Title: Preparation process of phosphotriaromatic ester
Application Number: 89106790 Application Date: 1989.08.29
Publication Number: 1049848 Publication Date: 1991.03.13
Approval Pub. Date: Granted Pub. Date: 1993.09.15
International Classifi-cation: C07F9/12
Applicant(s) Name: Changchun Inst. of Applied Chemistry, Chinese Acad Address:
Inventor(s) Name:
Attorney & Agent: CAO GUIZHEN SONG TIANPING
Abstract:
     The present invention relates to a preparation process of phosphotriaromatic ester which belongs to organic synthesis. The said process is that the phenol or its homologue and phasphorus oxychloride are severely stirred and fed by two steps or multiple steps in the aqueous solution with 20% of NaOH and in the presence of a small amount of methylbenzene, and after the above-materials are reacted at 25 deg.C, the temp. is further raised to 50-60 deg.C so as to make them continuously react, and through the processes of depressurization and dehydration, and finally the phosphotriaromatic ester whose quality is up to film utilization grade is obtained and the yield approximates to 90%.
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