Title: Comprehensive extraction of gutta-percha
Application Number: 90101268 Application Date: 1990.03.15
Publication Number: 1054985 Publication Date: 1991.10.02
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C08C1/12,C08C2/06
Applicant(s) Name: Chemistry Inst., Chinese Academy of Sciences Address: 100080
Inventor(s) Name: Xue Zhaohong, Yan Ruifang
Attorney & Agent: YAN FANG
Abstract:
     The present invention refers to a method for the extraction of gutta-percha. It is an improvement of existing extraction method, i.e. retaining fermentation and steam-boiling and eliminating mechanical washing at early stage; performing solvent extraction of crude gutta-percha and purification at late stage. The said method prevents loss of fine gutta-percha and reduces equipment size and production cost.
Time: 7