Title: Process for preparing protein-removed natural rubber
Application Number: 99118693 Application Date: 1999.09.03
Publication Number: 1246485 Publication Date: 2000.03.08
Approval Pub. Date: Granted Pub. Date: 2002.10.09
International Classifi-cation: C08C1/04
Applicant(s) Name: Kunming Inst. of Phytology, Chinese Academy of Sci Address: 650204
Inventor(s) Name: Zeng Hing, Wang Dong
Attorney & Agent: ma xiaojing
Abstract:
     A process for preparing the protein-removed natural rubber uses the natural rubber milk as raw material and includes such steps as adding protease and surfactant, decomposing protein in rubber milk in alkaline condition, washing to remove the decomposed resultant, regulating viscosity with hydroxylamine sulfate, adding acid to neutralize the rubber milk acted by protease, and immidiate solidifying with steam. Obtained natural rubber has nitrogen content lower than 0.15%, ash content lower than 0.2% and PRI higher than 7.5. Its total recovery rate of dried rubber is not lower than 95%.
Time: 5
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