GB1490691A - Process for the decolourising of effluents - Google Patents

Process for the decolourising of effluents

Info

Publication number
GB1490691A
GB1490691A GB2847/76A GB284776A GB1490691A GB 1490691 A GB1490691 A GB 1490691A GB 2847/76 A GB2847/76 A GB 2847/76A GB 284776 A GB284776 A GB 284776A GB 1490691 A GB1490691 A GB 1490691A
Authority
GB
United Kingdom
Prior art keywords
polymers
groups
cationic
anionic
silica
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2847/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB1490691A publication Critical patent/GB1490691A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents

Abstract

1490691 Decolourizing aqueous solutions BAYER AG 26 Jan 1976 [27 Jan 1975] 02847/76 Heading ClC An aqueous solution containing a watersoluble anionic organic dyestuff is decolourized by precipitating the dyestuff with a watersoluble cationic or ampholytic polymer, which polymer has a molecular weight of 10<SP>3</SP> to 10<SP>7</SP>, contains at least 30 mol. per cent of monomer units carrying ionic groups and has a molar ratio of cationic to anionic groups of 100 : 0 to 30 : 70 or mixture of such polymers. The cationic polymers preferably contain groups of the formulµ -NR 1 R 2 or -NR 1 R 2 R 3 wherein R 1 , R 2 and R 3 are each hydrogen, alkyl, cycloalkyl, aralkyl or aryl, and the ampholytic polymers preferably contain the above cationic groups together with carboxylic or sulphonic acid groups. The polymers are preferably polymers of aminoalkyl esters of acrylic acid and methacrylic acid, dialkylamino-alkyl-acrylamides and methacrylamides and copolymers thereof with anionic and/or non-ionic monomers. Additional coagulants which may be used are iron (II), iron (III) and aluminium (III) salts, calcium oxide, silica, lignite, active charcoals, bentonite, Fuller's earth, silica gel, activated alumina, silica sols, zeolites, ion exchangers and adsorption resins.
GB2847/76A 1975-01-27 1976-01-26 Process for the decolourising of effluents Expired GB1490691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752503169 DE2503169B1 (en) 1975-01-27 1975-01-27 SEWAGE REMOVAL PROCESS

Publications (1)

Publication Number Publication Date
GB1490691A true GB1490691A (en) 1977-11-02

Family

ID=5937372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2847/76A Expired GB1490691A (en) 1975-01-27 1976-01-26 Process for the decolourising of effluents

Country Status (7)

Country Link
JP (1) JPS51101372A (en)
AT (1) AT339223B (en)
BE (1) BE837922A (en)
DE (1) DE2503169B1 (en)
FR (1) FR2298514A1 (en)
GB (1) GB1490691A (en)
SE (1) SE7600769L (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425238A (en) 1981-03-25 1984-01-10 Basf Aktiengesellschaft Removal of anionic compounds from water
CN111389378A (en) * 2020-03-27 2020-07-10 重庆大学 Amphoteric self-floating adsorbent, preparation method and application
CN111943340A (en) * 2020-06-15 2020-11-17 中国纺织科学研究院有限公司 Purification method of Lyocell spinning coagulation bath recovery liquid

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2508246A1 (en) * 1975-02-26 1976-09-09 Bayer Ag PROCESS FOR THE REMOVAL OF WATER-SOLUBLE IONIC COMPOUNDS FROM AQUATIC SOLUTIONS BY ULTRAFILTRATION
GB8512937D0 (en) * 1985-05-22 1985-06-26 Allied Colloids Ltd Water treatment
DE19725096C2 (en) * 1997-06-13 2001-05-10 Saechsisches Textilforsch Inst Process for the elimination of reactive dyes and their hydrolyzates from waste water
CN111153482A (en) * 2020-01-14 2020-05-15 广东碧清环保科技股份有限公司 Wastewater zero-discharge sewage treatment technology for garment dry printing production

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1471426A (en) * 1965-03-11 1967-03-03 Ici Ltd Process for clarifying and decolorizing aqueous systems containing suspended particles
GB1424702A (en) * 1972-04-27 1976-02-11 Kanebo Ltd Method of decolourizing waste coloured aqueous liquid
US3843585A (en) * 1972-04-28 1974-10-22 Dow Chemical Co Coacervation of anion-containing aqueous disperse systems with amphoteric polyelectrolytes
CH572449A5 (en) * 1972-06-23 1976-02-13 Ciba Geigy Ag

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425238A (en) 1981-03-25 1984-01-10 Basf Aktiengesellschaft Removal of anionic compounds from water
CN111389378A (en) * 2020-03-27 2020-07-10 重庆大学 Amphoteric self-floating adsorbent, preparation method and application
CN111943340A (en) * 2020-06-15 2020-11-17 中国纺织科学研究院有限公司 Purification method of Lyocell spinning coagulation bath recovery liquid

Also Published As

Publication number Publication date
SE7600769L (en) 1976-07-28
FR2298514A1 (en) 1976-08-20
BE837922A (en) 1976-07-27
ATA51176A (en) 1977-01-15
FR2298514B1 (en) 1979-08-24
DE2503169B1 (en) 1976-06-16
JPS51101372A (en) 1976-09-07
AT339223B (en) 1977-10-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee