【発明の名称】リグノセルロース材料のアセチル化方法

Title:

【発明の名称】リグノセルロース材料のアセチル化方法

Document Type and Number:

Japanese Patent JPH0622801

Kind Code:

B2

Abstract:

Reaction of lignocellulosic material with acetic anhydride greatly improves dimensional stability and resistance to biological attack and is, according to the invention, made in the absence of any cosolvent or added catalyst and in a simple way. Partially dried or dry lignocellulosic material is treated with liquid acetic anhydride for a short period of time, the time being adapted to the dimension of the material used. In a following step, any excess anhydride not impregnated into the material is removed. The impregnated lignocellulosic material is then placed in a heated chamber to yield acetylation to a predetermined weight gain. After a short period of time, again adapted to the dimension of the material, unconsumed acetic anhydride and byproduct acetic acid are removed from the heated chamber and recovered.

Inventors:

ROGAA EMU ROERU

Application Number:

JP20121186A

Publication Date:

March 30, 1994

Filing Date:

August 27, 1986

Export Citation:

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Assignee:

EI SERU ASECHIRU SERUROSHIKUSU AB

International Classes:

B27K3/36; B27K5/00; C08B3/06; D21C9/00; (IPC1-7): B27K5/00; C08B3/06

Domestic Patent References:

JP5933133A
JP60253503A

Attorney, Agent or Firm:

Hideo Dobashi (1 outside)

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