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BR9813550A - "processo para tratamento de licor contendo lama vermelha de processo bayer e para preparação de copolìmeros em emulsão de alto peso molecular por meio de polimerização via radicais livres de monÈmeros, e, emulsão de um copolìmero de alto peso molecular formado por polimerização via radicais livres de monÈmeros." - Google Patents

"processo para tratamento de licor contendo lama vermelha de processo bayer e para preparação de copolìmeros em emulsão de alto peso molecular por meio de polimerização via radicais livres de monÈmeros, e, emulsão de um copolìmero de alto peso molecular formado por polimerização via radicais livres de monÈmeros."

Info

Publication number
BR9813550A
BR9813550A BR9813550-3A BR9813550A BR9813550A BR 9813550 A BR9813550 A BR 9813550A BR 9813550 A BR9813550 A BR 9813550A BR 9813550 A BR9813550 A BR 9813550A
Authority
BR
Brazil
Prior art keywords
molecular weight
monomers
high molecular
emulsion
free radicals
Prior art date
Application number
BR9813550-3A
Other languages
English (en)
Other versions
BR9813550B1 (pt
Inventor
Radhakrishnan Selvarajan
Everett C Phillips
Michael G Strominger
James Adrian Counter
Original Assignee
Nalco Chemical Co
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
Priority claimed from US08/991,103 external-priority patent/US6036869A/en
Priority claimed from US09/074,706 external-priority patent/US6048463A/en
Application filed by Nalco Chemical Co filed Critical Nalco Chemical Co
Publication of BR9813550A publication Critical patent/BR9813550A/pt
Publication of BR9813550B1 publication Critical patent/BR9813550B1/pt

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
    • C02F1/56—Macromolecular compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/0646—Separation of the insoluble residue, e.g. of red mud
    • C01F7/0653—Separation of the insoluble residue, e.g. of red mud characterised by the flocculant added to the slurry

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

"PROCESSOS PARA TRATAMENTO DE LICOR CONTENDO LAMA VERMELHA DE PROCESSO BAYER E PARA PREPARAçãO DE COPOLìMEROS EM EMULSãO DE ALTO PESO MOLECULAR POR MEIO DE POLIMERIZAçãO VIA RADICAIS LIVRES DE MONÈMEROS, E, EMULSãO DE UM COPOLìMERO DE ALTO PESO MOLECULAR FORMADO POR POLIMERIZAçãO VIA RADICAIS LIVRES DE MONÈMEROS" A presente invenção refere-se às melhorias no processo de mineração Bayer, usado para a recuperação de alumina de minério de bauxita. Polímeros em emulsão aquosa contínua são vantajosamente empregados para melhorar a clarificação, filtração e controle de incrustação da lama vermelha contendo licores gerados durante o processo Bayer. Polímeros de alto peso molecular preferidos são poli(acrilato de metila/ácido acrílico), poli(acrilato de metila), poli(acetato de vinila/ácido acrílico/acrilato de mentila) e uma combinação de poli(acrilato de metila/ácido acrílico) de alto peso molecular com um poli(acrilato de metila/ácido acrílico) de baixo peso molecular.
BRPI9813550-3A 1997-12-12 1998-12-10 processo para preparação de copolìmeros de alto peso molecular em emulsão, processo para floculação de sólidos suspensos no licor contendo lama vermelha do processo bayer, emulsão de um copolìmero de alto peso molecular, e, processo para inibir a formação de incrustação em equipamento de processo bayer. BR9813550B1 (pt)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/991,103 US6036869A (en) 1997-12-12 1997-12-12 Water continuous methyl acrylate emulsion polymers for improved flocculation of red mud in the Bayer process
US09/074,706 US6048463A (en) 1997-12-12 1998-05-08 Water continuous methyl acrylate emulsion polymer combinations and methyl acrylate emulsion homopolymers for improved flocculation of red mud in the bayer process
US09/203,314 US6086771A (en) 1997-12-12 1998-11-30 Water continuous emulsion polymers for improving scale control in the bayer process
PCT/US1998/026207 WO1999030794A1 (en) 1997-12-12 1998-12-10 Water continuous emulsion polymers for improving the efficiency of filtration, clarification and scale control in the bayer process

Publications (2)

Publication Number Publication Date
BR9813550A true BR9813550A (pt) 2000-10-10
BR9813550B1 BR9813550B1 (pt) 2009-05-05

Family

ID=27372530

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9813550-3A BR9813550B1 (pt) 1997-12-12 1998-12-10 processo para preparação de copolìmeros de alto peso molecular em emulsão, processo para floculação de sólidos suspensos no licor contendo lama vermelha do processo bayer, emulsão de um copolìmero de alto peso molecular, e, processo para inibir a formação de incrustação em equipamento de processo bayer.

Country Status (6)

Country Link
US (1) US6086771A (pt)
EP (1) EP1051227B1 (pt)
AU (1) AU746403B2 (pt)
BR (1) BR9813550B1 (pt)
CA (1) CA2314946A1 (pt)
WO (1) WO1999030794A1 (pt)

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US6527959B1 (en) 2001-01-29 2003-03-04 Ondeo Nalco Company Method of clarifying bayer process liquors using salicylic acid containing polymers
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US20080107578A1 (en) * 2006-11-07 2008-05-08 Jing Wang The recovery of alumina trihydrate during the bayer process using a water continuous polymer
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US9416490B2 (en) 2010-03-10 2016-08-16 Nalco Company Cross-linked glycerol based polymers as digestion aids for improving wood pulping processes
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CN109437217A (zh) * 2018-10-30 2019-03-08 东北大学设计研究院（有限公司） 一种赤泥处理及氧化铝生产的方法
CN110217811A (zh) * 2019-06-27 2019-09-10 沈阳铝镁设计研究院有限公司 一种串联法氧化铝生产工艺

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Also Published As

Publication number Publication date
CA2314946A1 (en) 1999-06-24
EP1051227B1 (en) 2006-03-08
AU1813699A (en) 1999-07-05
AU746403B2 (en) 2002-05-02
EP1051227A1 (en) 2000-11-15
US6086771A (en) 2000-07-11
EP1051227A4 (en) 2001-11-28
WO1999030794A1 (en) 1999-06-24
BR9813550B1 (pt) 2009-05-05

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Legal Events

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B25A Requested transfer of rights approved

Free format text: ONDEO NALCO COMPANY (US)

B25D Requested change of name of applicant approved
B25G Requested change of headquarter approved
B25D Requested change of name of applicant approved
B25L Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled
B25G Requested change of headquarter approved
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 30/06/2009, OBSERVADAS AS CONDICOES LEGAIS.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE A 16A ANUIDADE.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2284 DE 14-10-2014 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.