【発明の名称】リグニンの回収方法及びその方法により得られるリグニン並びにその回収装置

Title:

【発明の名称】リグニンの回収方法及びその方法により得られるリグニン並びにその回収装置

Document Type and Number:

Japanese Patent JP2526220

Kind Code:

B2

Abstract:

Lignin is precipitated in high yields and at high rates from a black liquor produced by pulping wood at high temperatures and pressures with an aqueous lower aliphatic alcohol solvent. The lignin is precipitated by diluting the black liquor with water and an acid to form a solution with a pH of less than 3, an alcohol content of less than 30% by volume and a temperature of less than 75 DEG C. The precipitated lignin, when subsequently dried, is in the form of a powder which requires little or no crushing to convert it into a fine uniform size suitable for use without further significant processing.

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Inventors:

Gyro Etch. Laura
Rafael Katzen
Marcolm Clonland
Chifeu

Application Number:

JP26208386A

Publication Date:

August 21, 1996

Filing Date:

November 05, 1986

Export Citation:

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Assignee:

Arcel Technologies, Inc.

International Classes:

C07D307/50; C07G1/00; C08H3/00; C08H7/00; D21C3/20; D21C11/00; (IPC1-7): C07G1/00

Domestic Patent References:

JP5836291A
JP5279560A

Other References:

【文献】米国特許4100016(US,A)

Attorney, Agent or Firm:

Hiroyuki Niwa

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