Title:
ACTIVE CARBON FOR REFINING DRY CLEANING SOLVENT
Document Type and Number:
Japanese Patent JP3519850
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an active carbon suppressing adsorption of soap from a dry cleaning solvent and selectively adsorbing the soiling by using the active carbon having specific fine pores and being specific in the fine pore volume.
SOLUTION: A carbon starting material such as coal and palm shell coal is pulverized with a ring roller, etc., and compared. Next, this compacted product is cracked conforming to the particle size of the final product with a cracker and sieved. Besides, the product regulated in particle size is carbonized in an inactive atmosphere and activated in a steam atmosphere. The product having ≥0.19cc/cc fine pore volume of 10-300&angst fine pore diameter and having ≤0.04cc/cc fine pore volume of 20-500&angst fine pore diameter, when measured by a nitrogen adsorption method, is used as the active carbon for this purpose. This product suppresses soap adsorption performance without degrading the decoloring performance.
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Inventors:
Matsuura, Kazushi
Akihiro I.
Maeda, Takashi
Akihiro I.
Maeda, Takashi
Application Number:
JP2047696A
Publication Date:
April 19, 2004
Filing Date:
January 11, 1996
Export Citation:
Assignee:
MITSUBISHI CHEM CORP
KYORITSU KOGYO KK
KYORITSU KOGYO KK
International Classes:
B01D15/00; B01J20/20; B01J20/28; C01B31/08; C11D7/50; D06F43/08; (IPC1-7): B01J20/20; B01D15/00; B01J20/28; C01B31/08; D06F43/08
Attorney, Agent or Firm:
岡田 数彦