Title: Rosin catalyzed by rare-earth metal oxide and method of esterification of derivatives thereof
Application Number: 99116159 Application Date: 1999.04.28
Publication Number: 1235180 Publication Date: 1999.11.17
Approval Pub. Date: Granted Pub. Date: 2001.11.07
International Classifi-cation: C09F1/04
Applicant(s) Name: Guangzhou Chemistry Inst., Chinese Academy of Scie Address: 510650
Inventor(s) Name: Ha Chengyong, Hao Qiang
Attorney & Agent: li jilan
Abstract:
     The present invention relates to a process for esterifying rosin and its derivatives under the catalysis of rare-earth metal oxide and dicloses a catalyst. Said catalyst for esterifying rosin and its derivatives is the oxides of three-valence rure-earth metals, especially Nd2O3, Sm2O3, Gd2O3 and La2O3. The advantages of said catalyst include less consumption (0.08-2%), short reaction time, low reaction temp and uniform transparency and light colour of esterified products.
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