MXPA03003856A - Eteres de celulosa y metodos para preparar los mismos. - Google Patents

Eteres de celulosa y metodos para preparar los mismos.

Info

Publication number
MXPA03003856A
MXPA03003856A MXPA03003856A MXPA03003856A MXPA03003856A MX PA03003856 A MXPA03003856 A MX PA03003856A MX PA03003856 A MXPA03003856 A MX PA03003856A MX PA03003856 A MXPA03003856 A MX PA03003856A MX PA03003856 A MXPA03003856 A MX PA03003856A
Authority
MX
Mexico
Prior art keywords
cellulose
mercerized
pulp
cellulose pulp
floc
Prior art date
Application number
MXPA03003856A
Other languages
English (en)
Inventor
Roger Bruce Harding
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 MXPA03003856A publication Critical patent/MXPA03003856A/es

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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

La presente invencion ha descubierto que la reologia de solucion de eteres de celulosa preparados a partir de pulpa de celulosa, se altera mercerizando y recuperando pulpa de celulosa antes de preparar los eteres de celulosa. Por ejemplo, la viscosidad de solucion de carboximetil celulosa (CMC) producida a partir de pulpa de celulosa mercerizada y recuperada es significativamente mayor a la producida a partir de pulpa de celulosa no mercerizada. La presente invencion proporciona un metodo para preparar eteres de celulosa que comprende los pasos de (a) obtener pulpa de celulosa mercerizada y recuperada, y (b) pulpa de celulosa recuperada en eteres de celulosa. De acuerdo con una modalidad, la pulpa de celulosa es material kraft de madera suave del sur y la pulpa de celulosa mercerizada tiene una viscosidad om-89 TAPPI 230 de cuando mucho 12 cP. Sin embargo, este metodo puede aplicar a todas las pulpas de celulosa, sin importar sus viscosidades, incluyendo aquellas que cuando se mercerizan tienen una viscosidad mayor a 12 cP. La pulpa de celulosa mercerizada normalmente esta substancialmente libre de celulosa III. La pulpa de celulosa mercerizada preparada a traves de este metodo tiene un porcentaje mayor de celulosa cristalina II y un area cristalina menor que la de la pulpa de celulosa no mercerizada. La presente invencion tambien proporciona un metodo para preparar un floculo de celulosa que comprende los pasos de (a) obtener pulpa de celulosa mercerizada y recuperada, y (b) tratar la pulpa mercerizada para formar el floculo de celulosa. Como alternativa, el metodo comprende mercerizar y recuperar un floculo de celulosa. El floculo de celulosa preparado a traves de este metodo tiene una mayor densidad de volumen que el floculo de celulosa preparado a partir de pulpa de celulosa no mercerizada similar. Ademas, la ganancia de densidad por volumen es mayor a la que se espera de la ganancia de grosor (peso por unidad de longitud de fibra) de la preparacion de un floculo de celulosa.
MXPA03003856A 2000-11-01 2001-10-31 Eteres de celulosa y metodos para preparar los mismos. MXPA03003856A (es)

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
MXPA03003856A true MXPA03003856A (es) 2004-04-20

Family

ID=22925053

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA03003856A MXPA03003856A (es) 2000-11-01 2001-10-31 Eteres de celulosa y metodos para preparar los mismos.

Country Status (11)

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

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Also Published As

Publication number Publication date
WO2002036636A1 (en) 2002-05-10
US20050250940A1 (en) 2005-11-10
EP1334132A1 (en) 2003-08-13
NO20031988L (no) 2003-07-01
US7022837B2 (en) 2006-04-04
CN1503807A (zh) 2004-06-09
AR031183A1 (es) 2003-09-10
JP2004536155A (ja) 2004-12-02
US20020103368A1 (en) 2002-08-01
AU2002220070A1 (en) 2002-05-15
JP4195289B2 (ja) 2008-12-10
CN1312184C (zh) 2007-04-25
BR0115388A (pt) 2005-01-04
NO20031988D0 (no) 2003-05-02
CA2427698A1 (en) 2002-05-10

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