Title: Process for preparing disperser by improving lignin
Application Number: 00131005 Application Date: 2000.12.27
Publication Number: 1306026 Publication Date: 2001.08.01
Approval Pub. Date: Granted Pub. Date: 2004.02.04
International Classifi-cation: C08H5/02,C25B3/02
Applicant(s) Name: Guangzhou Inst of Chemistry, Chinese Academy of Sc Address: 510650
Inventor(s) Name: Wei Handao, Lu Zuomin
Attorney & Agent: li jilan
Abstract:
     A process for preparing disperser by modifying lignin includes electrically oxidizing lignin solution with 2-12 of pH value at 10-40 deg.C by applying DC 2-12 V to it, adding formaldehyde and sulfite, and sulfomethylating reaction at 100-175 deg.C for 1-5 hr. Its advantages include gentle reaction condition, high dispersity and no environmental pollution.
Time: 3