- Type of paper
: Book
Title:
- Authors:
- Ivekovi), H.
- Kunst, Branko (24706)
- Ivi), S.
Publisher: HAZU
ISBN: 953-154-002-0
Year: 1995
Number of pages: 195
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- Sambrailo, Dubravko (42293)
- Kunst, Branko (24706)
Journal: Desalination
Number: 81
Year: 1991
Pages: from 209 to 218
Number of references: 11
Language: engleski
- Type of paper
: Paper in journal
Title:
- Authors:
- Kaštelan-Kunst, Lucija (20410)
- Sambrailo, Dubravko (42293)
- Kunst, Branko (24706)
Journal: Desalination
ISSN: 0011-9164
Volume: 83
Year: 1991
Pages: from 331 to 342
Number of references: 19
Language: engleski
Summary: The effect of casting dope parameters like a dioxane to
acetoneratio and a maleic acid content in the process of
asymmetriccellulose triacetate membrane preparation were investigated.
Theresults were considered in terms of possible pore sizedistribution in
the membranes skin. It was found that the secondparameter, the maleic acid
content, played a significant role inthe formation process, affecting
strongly the performance ofmembranes.
- Type of paper
: Paper in journal
Title: Particle Size Distribution Function: Selection and
Successful Application
- Authors:
- Hraste, Marin (16553)
Journal: Kemija u Industriji
Number: 2
ISSN: 0022-9830
Volume: 41
Year: 1992
Pages: from 49 to 53
Number of references: 24
Language: hrvatski
Summary: The behaviour and the properties of particulate materials
are to large degree dependent on their distributions. Frequently
theparticle size distributions obtaine dby experiment are
consideredinsufficient and one strives for approximate the measured
valuesby an analytic function. It is believed that a successfulapplication
of a distribution function should depend not only onthe simplicity of the
function but also on the aggrement betweenthe properties of a real particle
size distribution and themathematical properties of the function. Any
function proposedfor describing particle size distribution should satisfy
theboundary conditions that come from physical considerations.
- Type of paper
: Paper in journal
Title: Deep Bed Filtration
- Authors:
- Glasnović, Antun (13493)
Journal: Kemija u Industriji
Number: 5
ISSN: 0022-9830
Volume: 41
Year: 1992
Pages: from 163 to 176
Number of references: 55
Language: hrvatski
Summary: Deep bed filtration is an engineering practice of long
standingand is usually employed to remove fine and colloidal particlesfrom
dilute suspension. The investigation of deep bed filtrationhas been
developed in two directions: to provide a morefundamental understanding of
the deposition mechanisms, and topredict dynamic behaviour of deep bed
filters.
A review of published investigations and the recenr theories ofdeep bed
filtration was presented here.
- Type of paper
: Paper in journal
Title:
- Authors:
- Gambiroža, Nikola (183832)
- Hraste, Marin (16553)
- Mencer, Jasna Helena
Journal: New Polymeric Materials
Number: 1
ISSN: 0169-6424
Volume: 4
Year: 1993
Pages: from 13 to 18
Number of references: 17
Language: engleski
Summary: The interdependence of the relative viscosity of a
polyurethanecomposite propellent in relation to the mass fraction of
ammoniumperchlorate as a filler has been investigated. The fillerparticles
were of defined sizes, particle size distributions andparticle shapes.
Keywords: composite propellent, relative viscosity, dynamic mechanical properties, particle properties, glass transition temperature.
- Type of paper
: Paper in journal
Title:
- Authors:
- Dragičević, Tomislav
- Hraste, Marin (16553)
Journal: Chem.Biochem.Eng.Quarterly
Number: 2
ISSN: 0352-9568
Volume: 7
Year: 1993
Pages: from 89 to 95
Number of references: 24
Language: engleski
Summary: This study was undertaken to make a systematic research
ofdependence of silica particle size distribution on operatingvariables
during the neutralisation of fluosilicic acid.
The laboratory apparatus was used for preparation of silicasamples which
were immediately analysed by a Sedigraph 5000E. Theparticle size
distributions were defined by the parameters of theRRSB distribution
function.
During the experiments only one single parameter observed at atime was
varied.
It has been found that the raising of residence time, fluosilicicacid
concentration, pH and temperature cause the formation oflarger silica
particles.
The combination of these parameters with the rate of agitationgives silica
particle size distribution of determined size.
Keywords: particle, silica, fluosilicic acid.
- Type of paper
: Paper in journal
Title:
- Authors:
- Hraste, Marin (16553)
- Husnjak, Mirko
Journal: Chem.Biochem.Eng.Quarterly
Number: 2
Volume: 9
Year: 1995
Pages: from 105 to 106
Number of references: 6
Language: engleski
Summary: In this paper is confirmed that the well known Kneuležs
correlation may be applied with certainty for prediction of complete
suspension of solid particles in agitated tank in the range of critical
diameter ratio.
Keywords: suspension correlation, particle size, vessel diameter
- Type of paper
: Paper in journal
Title:
- Authors:
- Dragičević, Tomislav
- Hraste, Marin (16553)
Journal: Chem.Biochem.Eng.Quarterly
Number: 3
Volume: 8
Year: 1994
Pages: from 141 to 143
Number of references: 7
Language: engleski
Summary: The influence of PH value and acid concentration on surface
area of silica produced by neutralization of fluosilicic acid with gaseous
ammonia is analysed in this study. The amorphous structure of silica is
confirmed. The silica surface area has been determined by BET method and
the chrystal structure by x-ray diffraction analysis.
Keywords: surface area, silica, fluosilicic acid
- Type of paper
: Paper in journal
Title:
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Journal: Chem.Biochem.Eng.Quarterly
Number: 4
Volume: 8
Year: 1994
Pages: from 177 to 181
Number of references: 20
Language: engleski
Summary: In this work, the proposed equation for filter coefficient
determination was modified on the basis of the Adin's attachment-
detachment model. The quantitative influence of attachment and detachment
effects on filter coefficient values was established.
Keywords: deep bed filtration, filter coefficient, attachment effect, detachment effect
- Type of paper
: Paper in journal
Title:
- Authors:
- Prekop, Jadranka
- Mijatović, Ivan (30874)
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Journal: Chem.Biochem.Eng.Quarterly
Number: 4
Volume: 9
Year: 1995
Number of references: 15
Language: engleski
Summary: One of the most significant factors for an efficient
filtration process is chemical pretreatment of suspension. This procedure
is carried out to destabilize electrically charged solid particles. In this
paper the bentonite suspension with different polyelectrolyte
concentrations were filtrated. The filter coefficient was taken as an
efficiency parameter, which enables prediction of optimal destabilization
conditions, as well as good filtration. Furthermore, the changes of
particle size distribution during filtration runs were measured to explain
which polymer interaction is dominant and how the suspension dispersity
affects filtration efficiency.
Keywords: deep bed filtration, filter coefficient, zeta potential, flocculation, coagulation
- Type of paper
: Paper in journal
Title: The Frictional Pressure Drop Estimation of Two Phase
Horizontal Flow in Transition Hydrodynamics Region
- Authors:
- Katanec, Sonja
- Frankovi), Robert
- Glasnović, Antun (13493)
Journal: Kemija u Industriji
Number: 3
Volume: 44
Year: 1995
Pages: from 137 to 140
Number of references: 7
Language: hrvatski
- Type of paper
: Paper in journal
Title:
- Authors:
- Kaštelan-Kunst, Lucija (20410)
- Danani), Vladimir
- Kunst, Branko (24706)
- Košutić, Krešimir
Journal: Journal of Membrane Science
Language: engleski
Summary: The good cellulose triacetate reverse osmosis membranes
have been prepared by the phase separation technique. The membrane
properties were influenced by the membrane casting dope composition, mostly
by the dioxane/acetone ratio and the maleic acid content in the casting
dope.The distinctive membrane performances were caused by different pore
size distributions and various numbers of pores in the membranesž skin. The
improved pore size distribution analysis and the calculation of both the
effective number of pores and the active part of the membranesž surface
area have shown a wide spectrum of the network pore size and usually one
size group of bigger aggregate pores.
- Type of paper
: Paper in proceedings
Title: The application of kinetic equation for prediction of deep
bed filtersefficiency
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
- Editors
- Glavič, Peter
- Slovensko kemijsko društvo,
Proceedings title: Zbornik referatov s posavetovanja Separacijski procesi v heterogenih sistemih
Language: slovenski
Place: Maribor, Slovenija
Year: 1992
Pages: from 8 to 17
Meeting: Separacijski procesi v heterogenih sistemih
Held: from 10/13/92 to 10/14/92
Summary: The aim of this work was predicting of dynamic behaviour of
deepbed filter using varying working conditions and processparameters. The
simulated values of specific deposit for varyingprocess parameters have
been calculated on the basis of estimatedfilter coefficients obtained from
kinetic equation.
The results show that a good agreement has been obtained and thatthe
proposed mathematical model is applicable for design of deepbed filters.
- Type of paper
: Paper in proceedings
Title: Scale Up Problems in Filtration Process
- Authors:
- Latas, Jadranka
- Grozdek, Zdravka
- Ćorić, Miljenko
- Hraste, Marin (16553)
- Editors
- Slovensko kemijsko društvo,
- Glavič, Peter
Proceedings title: Zbornik referatov s posavetovanja Separacijski procesi v heterogenih sistemih
Language: slovenski
Place: Maribor, Slovenija
Year: 1992
Pages: from 18 to 24
Meeting: Separacijski procesi v heterogenih sistemih
Held: from 10/13/92 to 10/14/92
Summary: The size of filter required for a duty is calculated
usingclassical filtration equations which take into account thespecific
filtration resistance. There is always need for anadditional factor in the
final sizing. This scale up factor isnot safety factor.
The aim of this work is to analyze the relation between thefiltration
resistance and the scale up factor on three vacuumNutshes of different
sizes.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Gambiroža, Nikola (183832)
- Hraste, Marin (16553)
- Editors
- Behrens, D.
Proceedings title: Preprints of IV World Congress of Chemical Engineering
Language: engleski
Place: Karlsruhe, Njemačka
Year: 1991
Pages: from 4 to 12
Meeting: DECHEMA
Held: from 06/16/91 to 06/21/91
Summary: By correlation of experimental results the
functionalrelationship of storage modulus, loss modulus and loss
tangentevs. against median value at glass transition temperature fordefined
particle systems is expressed by a general equation.
- Type of paper
: Paper in proceedings
Title: The influence of transport mechanisms on the collector
efficiency in deep bed filtration
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Proceedings title: Interfiltra '92.
Language: francuski
Place: Pariz, Francuska
Year: 1992
Pages: from 1 to 8
Meeting: Interfiltra
Held: from 10/05/92 to 10/09/92
Summary: The aim of this work was to provide the information
abouttransport mechanisms in deep bed filtration in definedpolydisperse
system, and their influence on collector efficiency.The calculated values
of macroscopic parameters have beenconected with microscopic parameters
which describe thosemechanisms.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Husnjak, Mirko
- Hraste, Marin (16553)
Proceedings title: Proceedings of VI Mediterranean Congress on Chemical Engineering
Language: engleski
Place: Barcelona, Španjolska
Year: 1993
Pages: from 104 to 106
Meeting: VI Mediterranean Congress on Chemical Engineering
Held: from 10/18/93 to 10/20/93
Summary: There are two limiting laws describing the suspension
process:the off-bottom state ang generation of homogenous suspension.
Thefirst law applies to large particles in a small stirred vesseland the
second to small particles in a large agitated tank.Equating the two
suspension criteria a critical diameter ratio ofparticle size to vessel
diameter is obtained. A question ariseswhich suspension correlation fits
the best the experimentalresults in the range of critical diameter ratio.
The results showthat the Kneule's correlation fits the best.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Prekop, Jadranka
- Mijatović, Ivan (30874)
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
- Editors
- Prekop, Jadranka
Proceedings title: VI Mediterranean Congress on Chemical Engineering
Language: engleski
Place: Barcelona, Španjolska
Year: 1993
Pages: from 193 to 195
Meeting: VI Mediterranean Congress on Chemical Engineering
Held: from 10/18/93 to 10/20/93
Summary: In this work the influence of flocculants on the change
ofsuspended particle size distribution and in this manner on theparticle
removal was investigated. The results show that theconcentration of
cationic polyelectrolite has the influence onboth particle size and degree
of dispersity ( which are definedby parameters of LN function ).
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Proceedings title: VI Mediterranean Congress on Chemical Engineering
Language: engleski
Place: Barcelona, Španjolska
Year: 1993
Pages: from 183 to 185
Meeting: VI Mediterranean Congress on Chemical Engineering
Held: from 10/18/93 to 10/20/93
Summary: In deep bed filtration, suspended particles of different
sizesare removed by passing the fluid through a granular bed. But,while it
has long been recognized that particle size isimportant, little attention
has been paid to particle sizedistribution. The aim of this work was to
explain the influenceof particle size distribution on the mechanisms of
deep bedfiltration and on characteristic macroscopic parameters.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Proceedings title: Proceed.of the 6th Symposium on Particle Size Analysis, Environ.and Powder Techn
Language: engleski
Place: Gjor, Madžarska
Year: 1995
Pages: from 21 to 25
Meeting: 6th Symposium on Particle Size Analysis, Environmental and Powder Technology
Held: from 06/07/95 to 06/08/95
- Type of paper
: Summary in proceedings
Title: The application of kinetic equation in deep bed filtration
process
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Proceedings title: Sinopsisi radova XII Sastanka kemičara Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 266 to 0
Meeting: XII Sastanak kemičara Hrvatske
Held: from 02/11/91 to 02/13/91
- Type of paper
: Summary in proceedings
Title: Mixing of solid suspension in transition hydrodynamic
regions
- Authors:
- Osmak, Snježana (158994)
- Hraste, Marin (16553)
- Husnjak, Mirko
Proceedings title: Sinopsisi radova XII Sastanka kemičara Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 312 to 0
Meeting: XII Sastanak kemičara Hrvatske
Held: from 02/11/91 to 02/13/91
- Type of paper
: Summary in proceedings
Title: The study of deep bed filtration mechanisms in the
presence of flocculants
- Authors:
- Prekop, Jadranka
- Osmak, Snježana (158994)
- Mijatović, Ivan (30874)
- Glasnović, Antun (13493)
Proceedings title: XIII Skup hrvatskih kemičara
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 315 to 0
Meeting: XIII Skup hrvatskih kemičara
Held: from 02/08/93 to 02/10/93
- Type of paper
: Summary in proceedings
Title: Reverse osmotic asymmetric triacetate membranes
- Authors:
- Košutić, Krešimir
- Kunst, Branko (24706)
Proceedings title: XIII Skup hrvatskih kemičara
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 288 to 0
Meeting: XIII Skup hrvatskih kemičara
Held: from 02/08/93 to 02/10/93
- Type of paper
: Summary in proceedings
Title: The comparison of different technics for measuring of
particle size distribution
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
- Hraste, Marin (16553)
Proceedings title: Od uzorka do podatka i informacije
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 96 to 0
Meeting: Od uzorka do podatka i informacije
Held: from 10/20/93 to 10/23/93
- Type of paper
: Summary in proceedings
Title: The estimation of deep bed filter efficiency on the basis
of defined particle size distribution
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
- Hraste, Marin (16553)
Proceedings title: Od uzorka do podatka i informacije
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 96 to 0
Meeting: Od uzorka do podatka i informacije
Held: from 10/20/93 to 10/23/93
- Type of paper
: Summary in proceedings
Title: Pore size distribution functions
- Authors:
- Osmak, Snježana (158994)
- Špirić, Zdravko
- Glasnović, Antun (13493)
- Hraste, Marin (16553)
Proceedings title: Od uzorka do podatka i informacije
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 98 to 0
Meeting: Od uzorka do podatka i informacije
Held: from 10/20/93 to 10/23/93
- Type of paper
: Summary in proceedings
Title: Hydrolysis of Asymetric Cellulose Acetate Membranes
- Authors:
- Košutić, Krešimir
- Kunst, Branko (24706)
Proceedings title: XIV. Skup hrvatskih kemiČara i IV. hrvatski simpozij o kemiji i tehnologiji makr
Language: hrvatski
Place: Zagreb
Year: 1995
Pages: from 320 to 320
Meeting: XIV. Skup hrvatskih kemiČara i IV. hrvatski simpozij o kemiji i tehnologiji makromolekula
Held: from 02/06/95 to 02/08/95
- Type of paper
: Summary in proceedings
Title: The Influence of Characteristics of Suspension on the
Efficiency of Deep Bed Filter
- Authors:
- Osmak, Snježana (158994)
- Glasnović, Antun (13493)
Proceedings title: XIV.Skup hrvatskih kemiČara i IV. hrvatski simpozij o kemiji i tehnologiji makro
Language: hrvatski
Place: Zagreb
Year: 1995
Pages: from 323 to 323
Meeting: XIV. Skup hrvatskih kemiČara i IV. hrvatski simpozij o kemiji i tehnologiji makromolekula
Held: from 02/06/95 to 02/08/95
- Type of paper
: M.A.
Title: The study of deep bed filtration mechanisms
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Date of defense: 07/05/91
Language: hrvatski
Number of pages: 123
Summary: The possibility of the application of Adin's
phenomenologicalmodel to the understanding of transport and attachment
mechanismsin deep bed filtration has been investigated. The
calculatedvalues of Adin's macroscopic parameters have been connected
withmicroscopic parameters which describe those mechanisms.
Series of experimental runs of deep bed filtration were conductedwith solid
suspension of defined particle size distribution andconcentration. Filter
medium was polymer "Amberlite IR-120L" ofspherical particles.
On the basis of experimental data the attachment and detachmentcoefficients
and filter coefficient have been calculated. Fromexperimental values of the
filter coefficient the collectorefficiency has been calculated, what
provide description oftransport and attachment mechanisms.
The result show that the experimental values of filtercoefficient and
collector efficiency are compatible with thetheoretical ones.
Keywords: deep bed filtration, collector efficiency, filter coefficient, detachment mechanism, attachment mechanism, specific deposit.
- Type of paper
: M.A.
Title: Change of Transport Characteristics of Cellulose Acetate
Membranes Due to Hydrolysis
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Author: KOŠUTIĆ KREŠIMIR
Date of defense: 07/07/95
Language: hrvatski
Number of pages: 79
Summary: One of the factors that influences porous structure of
asymmetric cellulose acetate membranes as well as their chemical stability
is acetyl content (AC).
In this work, alkaline hydrolysis (ph=9.85) of CA and CTA membranes in
reverse osmosis equipment, under real conditions, was studied.
The changes of transport characteristics of membranes (A,(Dam/Kd),k) due to
hydrolysis were measured with a sodium chloride solution. An increase of
the measured values was observed as a result of the hydrolysis. The
findings can be attributed to the increase of the average pore size in the
skin layer.
The membranes were also tested with solutions of different markers (
nonpolar, spherical organic molecules).
To determine the pore size distribution in the membranesž skin layer,
before and after hydrolysis, the "Surface Force-Pore Flow" model for RO/UF
transport was applied.
The results indicate the polydispersity of pore. The pore size distribution
curves confirm an increase in the pore size due to hydrolysis.
All the results have shawn that in the investigated range of pH, CTA
membranes are chemicallymore stable than CA membranes. Therefore, the
former are more suitable for application.
Keywords: reverse osmosis, asymmetric membrane, cellulose acetate, cellulose triacetate, hydrolysis, transport characteristics of membrane, the pore size distribution
- Type of paper
: Mentorship
Title: The study of deep bed filtration mechanisms
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Date of defense: 07/05/91
Number of pages: 123
Author: Osmak Mr. Snježana
Degree level: M.A.
- Type of paper
: Mentorship
Title: The separation properties of amorphous silica
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Mentor: ADLER NEVENKA
Date of defense: 04/26/93
Number of pages: 116
Author: Dragičević Tomislav
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: The Study of Flocculants Concentration on Deep Bed
Filtration Mechanisms
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Mentor: GLASNOVIĆ ANTUN
Date of defense: 01/28/94
Number of pages: 111
Author: Prekop Jadranka
Degree level: M.A.
- Type of paper
: Mentorship
Title: Change of Transport Characteristics of Cellulose Acetate
Membranes Due to Hydrolysis
Faculty: Fakultet kemijskog inženjerstva i tehnologije Sveučilište u Zagrebu
Mentor: KUNST BRANKO
Date of defense: 07/07/95
Number of pages: 79
Author: Košutić Krešimir
Degree level: M.A.
