JPS5512109A - Preparation of chitosan - Google Patents

Preparation of chitosan

Info

Publication number
JPS5512109A
JPS5512109A JP8328078A JP8328078A JPS5512109A JP S5512109 A JPS5512109 A JP S5512109A JP 8328078 A JP8328078 A JP 8328078A JP 8328078 A JP8328078 A JP 8328078A JP S5512109 A JPS5512109 A JP S5512109A
Authority
JP
Japan
Prior art keywords
alkali solution
chitosan
chitin
water
polymer
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.)
Granted
Application number
JP8328078A
Other languages
Japanese (ja)
Other versions
JPS58441B2 (en
Inventor
Seiichi Mima
Masaru Miya
Susumu Yoshikawa
Reikichi Iwamoto
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP8328078A priority Critical patent/JPS58441B2/en
Publication of JPS5512109A publication Critical patent/JPS5512109A/en
Publication of JPS58441B2 publication Critical patent/JPS58441B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/08—Polysaccharides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

PURPOSE:To prepare a chitosan useful as a raw material of a membrane without lowering the performances characteristic of a polymer, by repeating the processes comprising heating of chitin together with an alkali solution, removal of the alkali solution and washing with water, thereby effecting the deacetylation of chitin. CONSTITUTION:Non-powdered chitin is heated together with a 40-50% alkali solution at 60-120 deg.C for 30-120 min. to give a deacetylated chitosan. The chitosan is separated from the alkali solution, washed with water, and again heated together with the concentrated alkali solution to deacetylate. If desired, water washing and the treatment with the alkali solution are repeatedly carried out. The heating time is decreased below a half of the original by this process. Deacetylation degree of 78% is obtained in the first treatment, 91% in the second and 95.5% in the third. EFFECT:The time required to attain a desired deacetylation degree can be decreased and the performances of the chitosan as a polymer can be maintained due to the reduced heating time.
JP8328078A 1978-07-08 1978-07-08 How to produce chitosan Expired JPS58441B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8328078A JPS58441B2 (en) 1978-07-08 1978-07-08 How to produce chitosan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8328078A JPS58441B2 (en) 1978-07-08 1978-07-08 How to produce chitosan

Publications (2)

Publication Number Publication Date
JPS5512109A true JPS5512109A (en) 1980-01-28
JPS58441B2 JPS58441B2 (en) 1983-01-06

Family

ID=13797946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8328078A Expired JPS58441B2 (en) 1978-07-08 1978-07-08 How to produce chitosan

Country Status (1)

Country Link
JP (1) JPS58441B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001068714A1 (en) * 2000-03-15 2001-09-20 Cargill, Incorporated Chitosan and method of preparing chitosan
US6693188B2 (en) 2001-08-08 2004-02-17 Cargill Incorporated N-acetyl-D-glucosamine and process for producing N-acetyl-D-glucosamine
US7488812B2 (en) 2002-04-02 2009-02-10 Cargill, Incorporated Chitosan production
US7816514B2 (en) 2001-02-16 2010-10-19 Cargill, Incorporated Glucosamine and method of making glucosamine from microbial biomass
US7923437B2 (en) 2001-02-16 2011-04-12 Cargill, Incorporated Water soluble β-glucan, glucosamine, and N-acetylglucosamine compositions and methods for making the same
US8222232B2 (en) 2001-02-16 2012-07-17 Cargill, Incorporated Glucosamine and N-acetylglucosamine compositions and methods of making the same fungal biomass

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0334920Y2 (en) * 1986-06-30 1991-07-24

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4817806B1 (en) * 1965-06-16 1973-06-01
JPS4915699Y1 (en) * 1969-11-13 1974-04-19
JPS5129455Y1 (en) * 1970-12-16 1976-07-24

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4817806B1 (en) * 1965-06-16 1973-06-01
JPS4915699Y1 (en) * 1969-11-13 1974-04-19
JPS5129455Y1 (en) * 1970-12-16 1976-07-24

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001068714A1 (en) * 2000-03-15 2001-09-20 Cargill, Incorporated Chitosan and method of preparing chitosan
US6972284B2 (en) 2000-03-15 2005-12-06 Cargill, Incorporated Chitosan and method of preparing chitosan
US7413881B2 (en) 2000-03-15 2008-08-19 Cargill, Incorporated Chitosan and method of preparing chitosan
US7816514B2 (en) 2001-02-16 2010-10-19 Cargill, Incorporated Glucosamine and method of making glucosamine from microbial biomass
US7923437B2 (en) 2001-02-16 2011-04-12 Cargill, Incorporated Water soluble β-glucan, glucosamine, and N-acetylglucosamine compositions and methods for making the same
US8034925B2 (en) 2001-02-16 2011-10-11 Cargill, Incorporated Glucosamine and method of making glucosamine from microbial biomass
US8222232B2 (en) 2001-02-16 2012-07-17 Cargill, Incorporated Glucosamine and N-acetylglucosamine compositions and methods of making the same fungal biomass
US6693188B2 (en) 2001-08-08 2004-02-17 Cargill Incorporated N-acetyl-D-glucosamine and process for producing N-acetyl-D-glucosamine
US7488812B2 (en) 2002-04-02 2009-02-10 Cargill, Incorporated Chitosan production

Also Published As

Publication number Publication date
JPS58441B2 (en) 1983-01-06

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