Title: Dihydro or tetrahydro-colophony made from pine gum by catalytic hydrogenation
Application Number: 93118671 Application Date: 1993.10.07
Publication Number: 1097448 Publication Date: 1995.01.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C09F1/04
Applicant(s) Name: Guangxi Univ. Address: 530004
Inventor(s) Name: Zhang Yunming, tang Yaxian
Attorney & Agent:
Abstract:
     Dihydro- or tetrahydro-colophony with stable properties and very light colour is prepared with the waste pine gum liquid from colophony plant through such steps as cooling crystalline, decolouring, dilution with solvent, catalytic hydrogenation, filter and low-temp. distillation. The process features lower reaction temp. and pressure, high quality of product and low cost.
Time: 4