Title:
【発明の名称】セルロース誘導体の製造法
Document Type and Number:
Japanese Patent JP2002510354
Kind Code:
A
Abstract:
PCT No. PCT/EP98/03907 Sec. 371 Date Feb. 14, 2000 Sec. 102(e) Date Feb. 14, 2000 PCT Filed Jun. 26, 1998 PCT Pub. No. WO99/02568 PCT Pub. Date Jan. 21, 1999Samples of commercial cellulose having high crystallinity (>80%) and a degree of polymerization of approximately 1500 were pretreated enzymatically under various conditions with commercial endoglucanases, before the chemical conversion to substituted cellulose derivatives was carried out. The enzymatically pretreated cellulose samples exhibited a significantly higher substitution, up to 222% higher, in comparison with control samples which had been treated with buffer without enzyme. The increase in substitution during the chemical reaction could be observed in the presence of various amounts of alkali, but fell as the amounts of alkali decreased. At the same degree of substitution of the cellulose derivative, the use of cellulose pretreated with endoglucanase significantly reduced the amount of alkali required by 60%, as compared with the use of cellulose pretreated only with buffer. Furthermore, by reducing the amount of water used in the reaction mixture in the chemical reaction, it was possible further to increase the substitution of enzymatically pretreated cellulose.
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Inventors:
Kotsuho, Reinhard
Berendes, frank
Huoster, Jiyoung
Last, Hans-Georg
Engelhard, Jurgen
Neubauer, Jerck
Kotsuho, Wolfgang
Stu Abrikowski, Klaus
Berendes, frank
Huoster, Jiyoung
Last, Hans-Georg
Engelhard, Jurgen
Neubauer, Jerck
Kotsuho, Wolfgang
Stu Abrikowski, Klaus
Application Number:
JP50806399A
Publication Date:
April 02, 2002
Filing Date:
June 26, 1998
Export Citation:
Assignee:
WOLFF WALSRODE AKTIENGESELLSCHAFT
International Classes:
C08B1/00; C08B1/06; C08B11/08; C12P19/14; C12S3/04; (IPC1-7): C08B1/00
Attorney, Agent or Firm:
Heiyoshi Odashima (1 person outside)