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1. WO1996005361 - FLOTATION DEINKING OF WASTEPAPER USING A FROTH CONTROLLING AGENT

Publication Number WO/1996/005361
Publication Date 22.02.1996
International Application No. PCT/US1995/010248
International Filing Date 10.08.1995
Chapter 2 Demand Filed 05.03.1996
IPC
B03D 1/008 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
001Flotation agents
004Organic compounds
008containing oxygen
D21B 1/32 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
1Fibrous raw materials or their mechanical treatment
04by dividing raw materials into small particles, e.g. fibres
12by wet methods; by the use of steam
30Defibrating by other means
32of waste paper
D21C 5/02 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
02Working-up waste paper
CPC
B03D 1/008
BPERFORMING OPERATIONS; TRANSPORTING
03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
DFLOTATION; DIFFERENTIAL SEDIMENTATION
1Flotation
001Flotation agents
004Organic compounds
008containing oxygen
D21B 1/325
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
1Fibrous raw materials or their mechanical treatment
04by dividing raw materials into small particles, e.g. fibres
12by wet methods, by the use of steam
30Defibrating by other means
32of waste paper
325de-inking devices
D21C 5/027
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
02Working-up waste paper
025De-inking
027Chemicals therefor
Y02W 30/646
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
30Technologies for solid waste management
50Reuse, recycling or recovery technologies
64Paper recycling
646Wet methods for dividing waste paper into small particles
Y02W 30/648
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
30Technologies for solid waste management
50Reuse, recycling or recovery technologies
64Paper recycling
648Recovery of cellulose by working-up waste paper
Y10S 162/03
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
162Paper making and fiber liberation
03Wetting agent
Applicants
  • PPG INDUSTRIES, INC. [US/US]; One PPG Place Pittsburgh, PA 15272, US
Inventors
  • LI, Chin; US
  • LONGHINI, David, A.; US
  • VIJAYENDRAN, Bhima, R.; US
Agents
  • STEIN, Irwin, M.; PPG Industries, Inc. One PPG Place Pittsburgh, PA 15272 , US
Priority Data
08/289,07211.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FLOTATION DEINKING OF WASTEPAPER USING A FROTH CONTROLLING AGENT
(FR) DESENCRAGE PAR FLOTTATION DE VIEUX PAPIERS AU MOYEN D'UN AGENT ABAT-MOUSSE
Abstract
(EN)
Describes flotation deinking of secondary fiber using a froth moderating agent, a composition of the froth moderating agent with flotation deinking chemicals, and reducing the amount of stickies in separated secondary fiber. The froth moderating agent is selected from the group consisting of: (a) nonionic surfactant material represented by the formula: R-C6H4O-(C2H4O)m-(C3H6O)n-(C4H8O)p-R1, wherein R is an aliphatic hydrocarbon group containing from about 5 to 20 carbon atoms, R1 is selected from the group consisting of chloro, C1-C3 alkyl, C1-C5 alkoxy and phenoxy, m, n, and p are each a number of between 0 and about 50, and the sum of m, n, and p is between about 1 and 50; (b) fatty acid esters of sorbitan; (c) certain alkoxylated fatty acid esters of sorbitan; (d) polypropylene glycol being at least 50 weight percent soluble in water; and (e) a combination of at least two of the materials selected from the group consisting of (a), (b), (c) and (d). Also described is the use of a froth controlling amount of nonionic surfactant material (a) alone or in combination with flotation deinking chemicals or other froth moderating agents in reducing the amount of stickies and enhancing the removal of electrostatic inks in the flotation deinking process.
(FR)
L'invention concerne le désencrage par flottation de fibres secondaires au moyen d'un agent abat-mousse, la composition de ce dernier à base de produits chimiques de désencrage par flottation, et la réduction du taux de grumeaux dans les fibres secondaires séparées. L'agent abat-mousse est choisi dans le groupe constitué de: (a) un matériau tensioactif non ionique représenté par la formule: R-C6H4O-(C2H4O)m-(C3H6O)n-(C4H8O)p-R1, dans laquelle R représente un groupe hydrocarbure aliphatique contenant environ 5 à 20 atomes de carbone, R1 est choisi dans le groupe consistant en chloro, alkyle C1-C3, alcoxy C1-C5 et phénoxy, m, n et p valent chacun entre 0 et 50, et la somme de m, n et p est comprise entre environ 1 et 50; (b) esters d'acide gras de sorbitane; (c) certains esters d'acide gras alcoxylés de sorbitane; (d) du polypropylène glycol soluble dans l'eau à raison d'au moins 50 % en poids; et (e) une combinaison d'au moins deux des matériaux sélectionnés dans le groupe constitué de (a), (b), (c) et (d). L'invention porte également sur l'utilisation d'une dose supprimant la mousse d'agent tensioactif non ionique (a) seul ou combiné à des produits chimiques de désencrage par flottation ou d'autres agents abat-mousse pour réduire le volume de grumeaux et augmenter l'efficacité d'extraction des encres électrostatiques dans le procédé de désencrage par flottation.
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