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Acrylic fiber physical properties and production of high-tenacity acrylic fibers / Mahdi Ketabchi in CHEMICAL FIBERS INTERNATIONAL, (10/2014)
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Titre : Acrylic fiber physical properties and production of high-tenacity acrylic fibers Type de document : texte imprimé Auteurs : Mahdi Ketabchi, Auteur ; Mahmoud Khodarahmi, Auteur ; Shamsollah Alijanlou, Auteur Année de publication : 2014 Article en page(s) : p. 62-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coagulation
Diméthylformamide
Fibres acryliques
Fibres textiles synthétiques
Filature au mouilléProcédé dans lequel une solution de substance fibrogène est extrudée dans un milieu liquide de coagulation où le polymère est régénéré, comme dans la fabrication de la viscose ou de la rayonne cuproammoniacale.
Polyacrylonitrile
Solutions de polymère
Solvants organiquesIndex. décimale : 677.4 Textiles artificiels Résumé : One of the most important parameters for acrylic fibers is tenacity, which is a basic customer demand in the textile industry. There are different methods to increase tenacity in co-polymer preparation (increasing solid percentage in dope, changing in viscisity etc.) and in spinning operation (changing the operating condition of coagulation bath, dryer etc.). But in an industrial, mass, steady production process there are serious limitations. In this article, the effect of determining parameters especially final stretch, shrinkage and coagulation in industrial production process to reach improved tenacity is investigated. The process in Acrylic II factory of Polyacryl Company is based on solution polymerization with DMF as solvent followed by wet spinning method to produce fibers. Note de contenu : - Material
- Theory
- Parameters related to spinning conditions
- Composition of the coagulation bathEn ligne : https://drive.google.com/file/d/1oIgn5GAFBNLKGI9SCi9No1KuJGpydfi_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22199
in CHEMICAL FIBERS INTERNATIONAL > (10/2014) . - p. 62-64[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16593 - Périodique Bibliothèque principale Documentaires Disponible Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
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Titre : Alternative treatments for footwear industry liquid effluents - Part 1 - Classical approach Type de document : texte imprimé Année de publication : 2002 Article en page(s) : p. 96-100 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Caractérisation
Charbon actif
Chaussures -- Industrie -- Aspect de l'environnement
Coagulation
Cuirs et peaux
Déchets industriels -- Elimination
Eaux usées -- Epuration
Eaux usées -- Recyclage
FloculationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The footwear industry generates small volumes of non-biodegradable liquid effluents from finishing operations which have a high organic load, mainly due to pigments, organic acids and organic solvents. In consequence, these effluents must be treated to accomplish regulatory requirements before discharge. One of the treatment alternatives is coagulation/flocculation, a well-known treatment for removing fine particles and colloids. Tests carried out using lime, aluminum sulphate, ferric chloride and ferric sulphate as coagulants gave chemical oxygen demand (COD) and 5-day biochemica1 oxygen demand (BOD5) removals over 80-90 %. However, despite this efficiency, some of the effluent characteristics are still higher than those imposed for discharge to surface waters, land or sewage systems. A polishing step using activated carbon adsorption is then required to permit the discharge to sewage systems, but the quantities of adsorbent required casts some doubt on the feasibility of the process. Note de contenu : - Characterisation of the effluents
- Coagulation/flocculation
- Activated carbon adsorption
- Table 1 : Characteristics of the effluents according to their residence time at the finishing system-
- Table 2 : Characteristics of the one-week-old sample B of effluent
- Table 3 : Jar tests with effluent sample B
- Table 4 : Selected conditions for coagulation/flocculation of A, B and C effluent samples
- Table 5 : Results of coagulation/flocculation on effluent A
- Table 6 : Results of coagulation/flocculation on effluent B
- Table 7 : Results of coagulation/flocculation on effluent C
- Table 8 : FeCl3 dose optimisation
- Table 9 : Results of coagulation/flocculation on effluent D
- Table 10 : Activated carbon treatment resultsEn ligne : https://drive.google.com/file/d/1_YusTO_2yqec69S27ZP60VA4rVk38bcV/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39922
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 96-100[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
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Titre : Chemical treatment Type de document : texte imprimé Auteurs : Karl Flowers, Auteur Année de publication : 2020 Article en page(s) : p. 40-44 Langues : Anglais (eng) Catégories : Coagulation
Déchets industriels -- Elimination
Eaux usées -- Epuration
Eaux usées -- Recyclage
Floculation
pH
Précipitation (chimie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The removal of pollutants from a tannery wastewater is an elementary requirement. Whether it is in the tanner's owen effluent treatment plant (ETP), a communal/common effluent treatment plant (CETP), or a municipal effluent plant will use a combination of methods in the treatment process to achieve this. The three broad categories of these treatments are physical, biological and chemical. These could also be hybridised into treatment systems that use more than one type of treatment. Physical removal methods like one type of tratment. Physical removal methods like screens, brushes, flow velocity fluctuations, pipe pressures or membrane filtration, can force pollutants out of a strem. Physico-chemical methods like electrolysis or reverse osmosis add a physico-chemical attribute to the separation.
Biological systems that are plentiful in tanneries where the weather permits rapid growth of bacteria, algae and other micro-organisms, play a role in removal of pollutants through the action of their enzymes or through bioaccumulation of the effluent chemistry into their biomass. A chemical method that is not going to be detailed in this article is the chemical inclusion of oxygen into the effluent ; a method known as aeration. Other chemical methods are detailed below.Note de contenu : - pH modification
- Coagulation
- Flocculation
- Precipitation (clarification) or flotation
- Fig. 1 : A soluble chemical is often a charged molecule that can electrostatically interact with the polar solvent
- Fig. 2 : By changing the pH or by adding a counterion, the solubility is decreased, and the solute will precipitate or float
- Fig. 3 : When a solute has one charge, it generally repels similar molecules and remains in solution and with a low particle size
- Fig. 4 : If a polymer is added to a solution of a specific charge, the polymer could cause the solute to precipitate and floc together to form very large particle sized aggregates (easili removed)
- Fig. 5 : In a flotation system instead of precipitating and allowing thesludge to sink, dissolved air flotation precipitates the floc and the air bubbles carry the aggregate upwards - to be skimmed offEn ligne : https://drive.google.com/file/d/1e4N2UD9XyhXfrFAOjW4rtqoZB65Ot6zy/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33708
in INTERNATIONAL LEATHER MAKER (ILM) > N° 40 (03-04/2020) . - p. 40-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21606 - Périodique Bibliothèque principale Documentaires Disponible Coagulation et floculants organiques de synthèse / Ciba (1996)
Titre : Coagulation et floculants organiques de synthèse Type de document : texte imprimé Editeur : Ciba Année de publication : 1996 Importance : Pagination multiple Présentation : ill. Format : 30 cm Note générale : Annexes - Bibliogr. Langues : Français (fre) Catégories : Coagulation
Colloides
Floculation
Polyélectrolytes
Solutions de polymèreIndex. décimale : 541.34 Solutions Note de contenu : - I. Polymères constitutifs des coagulants de synthèse
- II. Polymères constitutifs des floculants de synthèse
- III. Présentation de la gamme allied colloids
- IV. Domaines d'utilisation des floculants
- V. Utilisation des floculants dans les ERU
- VI. Emploi des floculants allied colloids en déshydratation des boues
- VII. Utilisation des floculants allied colloids en eau potable
- VIII. Mode de sélection d'un floculant / coagulant
- IX. Système automatique de préparation des solutions de polymèrePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6181 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 2664 541.34 COA Monographie Bibliothèque principale Documentaires Disponible Coagulation - Floculation / Ciba (1995)
Titre : Coagulation - Floculation Type de document : texte imprimé Editeur : Ciba Année de publication : 1995 Importance : Pagination multiple Présentation : ill. Format : 30 cm Note générale : Annexes - Bibliogr. Langues : Français (fre) Catégories : Coagulation
Colloides
FloculationIndex. décimale : 541.34 Solutions Note de contenu : - COAGULATION - FLOCULATION : I. Considérations sur la taille des particules en suspension et leur décantabilité - II. Charges électriques des particules colloïdales et double couche - III. Théorie de la coagulation - IV. Théorie de la floculation - V. Paramètres et équations régissant la floculation/coagulation - VI. Coagulants et floculants - VII. Mélangeur et floculateur
- COAGULATION SUR FILTRE
- COAGULANTS ET FLOCULANTS ALLIED COLLOIDSPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6180 Réservation
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Code-barres Cote Support Localisation Section Disponibilité 2663 541.34 COA Monographie Bibliothèque principale Documentaires Disponible Controlled coagulation of emulsion polymers / Edward Kostansek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 1 (01/2004)
PermalinkEffect of leather chemicals on Cr(III) removal from post tanning wastewater / Yuling Tang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 3 (03/2018)
PermalinkEfficient paint coagulation in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 11, N° 2 (2018)
PermalinkEnhanced clarification of tannery wastewater / Bruce. M. Poole in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
PermalinkExploring the mechanisms of the interaction between a specific bioflocculant and tannery wastewater / Changqing Zhao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 2 (03-04/2018)
PermalinkGraphene oxide flakes bolster carbon fibre / Changsheng Xiang in JEC COMPOSITES MAGAZINE, N° 83 (08-09/2013)
PermalinkNew solution spinning lab for process and product development in the man-made fiber industry / Christian Wilms in CHEMICAL FIBERS INTERNATIONAL, Vol. 63, N° 3 (09/2013)
PermalinkRemediation of spent vegetable tannins from waste tanning liquor through coagulation and ultrasound pre-treatment : a sustainable approach / Resmi Mohan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 9 (09/2022)
PermalinkTannery wastewater treatment : conventional and promising processes, an updated 20-year review / Jun Zhao in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 4 (Année 2022)
PermalinkVers le rejet zéro : étude technico-économique / Bertrand Sancey in GALVANO ORGANO, N° 833 (11/2014)
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