BR0115388A - éteres de celulose e método de preparação dos mesmos - Google Patents

éteres de celulose e método de preparação dos mesmos

Info

Publication number
BR0115388A
BR0115388A BR0115388-9A BR0115388A BR0115388A BR 0115388 A BR0115388 A BR 0115388A BR 0115388 A BR0115388 A BR 0115388A BR 0115388 A BR0115388 A BR 0115388A
Authority
BR
Brazil
Prior art keywords
cellulose
pulp
mercerized
flake
prepared
Prior art date
Application number
BR0115388-9A
Other languages
English (en)
Inventor
Roger Bruce Harding
Susan L H Crenshaw
Paul Eugene Gregory
Denise Hartnett Broughton
Original Assignee
Bki Holding Corp
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 Bki Holding Corp filed Critical Bki Holding Corp
Publication of BR0115388A publication Critical patent/BR0115388A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/02—Alkyl or cycloalkyl ethers
    • C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • C08B1/06—Rendering cellulose suitable for etherification
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • C08B1/08—Alkali cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/02—Alkyl or cycloalkyl ethers
    • C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
    • C08B11/10—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
    • C08B11/12—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals substituted with carboxylic radicals, e.g. carboxymethylcellulose [CMC]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)

Abstract

"éTERES DE CELULOSE E MéTODO DE PREPARAçãO DOS MESMOS". A presente invenção descobriu que a reologia de solução de éteres de celulose preparados de polpa de celulose é alterada pela mercerização e recuperação da polpa de celulose antes da preparação dos éteres de celulose. Por exemplo, a viscosidade da solução de carboximetil celulose (CMC) produzida de polpa de celulose mercerizada e recuperada é significativamente maior que aquela produzida de polpa de celulose não mercerizada. A presente invenção provê um método para a preparação de éteres de celulose compreendendo as etapas de (a) obtenção de polpa de celulose mercerizada e recuperada, e (b) recuperação da polpa de celulose em éteres de celulose. De acordo com uma configuração, a polpa de celulose é tipo kraft de madeira macia do sul e a polpa de celulose mercerizada possui uma viscosidade TAPPI 230 om-89 de no máximo 12 cP. Este método, entretanto, pode ser aplicado a todas as polpas de celulose, independente de suas viscosidades, incluindo aquelas que, quando mercerizadas, possuem uma viscosidade maior que 12 cP. A polpa de celulose mercerizada é tìpica e substancialmente isenta de celulose III. A polpa de celulose mercerizada preparada por este método possui uma porcentagem maior de celulose cristalina II e uma área cristalina menor que aquela de polpa de celulose não mercerizada. A presente invenção também provê um método para preparação de um floco de celulose compreendendo as etapas de (a) obtenção de polpa de celulose mercerizada e recuperada, e (b) tratamento da polpa mercerizada para formar o floco de celulose. Alternativamente, o método compreende a mercerização e recuperação de um floco de celulose. O floco de celulose preparado por este método possui uma densidade em massa maior que aquela do floco de celulose preparado de polpa de celulose similar não mercerizada. Além do mais, o ganho de densidade em massa é maior que aquele esperado do ganho de aspereza (peso por unidade de comprimento de fibra) da preparação de um floco de celulose.
BR0115388-9A 2000-11-01 2001-10-31 éteres de celulose e método de preparação dos mesmos BR0115388A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24503700P 2000-11-01 2000-11-01
PCT/US2001/045482 WO2002036636A1 (en) 2000-11-01 2001-10-31 Cellulose ethers and method of preparing the same

Publications (1)

Publication Number Publication Date
BR0115388A true BR0115388A (pt) 2005-01-04

Family

ID=22925053

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0115388-9A BR0115388A (pt) 2000-11-01 2001-10-31 éteres de celulose e método de preparação dos mesmos

Country Status (11)

Country Link
US (2) US7022837B2 (pt)
EP (1) EP1334132A1 (pt)
JP (1) JP4195289B2 (pt)
CN (1) CN1312184C (pt)
AR (1) AR031183A1 (pt)
AU (1) AU2002220070A1 (pt)
BR (1) BR0115388A (pt)
CA (1) CA2427698A1 (pt)
MX (1) MXPA03003856A (pt)
NO (1) NO20031988L (pt)
WO (1) WO2002036636A1 (pt)

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Also Published As

Publication number Publication date
NO20031988L (no) 2003-07-01
CN1312184C (zh) 2007-04-25
AU2002220070A1 (en) 2002-05-15
CA2427698A1 (en) 2002-05-10
EP1334132A1 (en) 2003-08-13
AR031183A1 (es) 2003-09-10
NO20031988D0 (no) 2003-05-02
WO2002036636A1 (en) 2002-05-10
JP2004536155A (ja) 2004-12-02
US7022837B2 (en) 2006-04-04
CN1503807A (zh) 2004-06-09
US20020103368A1 (en) 2002-08-01
MXPA03003856A (es) 2004-04-20
US20050250940A1 (en) 2005-11-10
JP4195289B2 (ja) 2008-12-10

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