申请人:E. I. Du Pont de Nemours and Company
公开号:US05112993A1
公开(公告)日:1992-05-12
A process for producing difluoromaleic anhydride by reacting sulfur trioxide with a fluorinated precursor selected from the group consisting of hexafluoro-2,5-dihydrofuran, hexafluoro-2,5-dihydrothiophene, difluoro-2,5-dihydrothiophene-2,5-dione and tetrafluoro-2,5-dihydrothiophene-2-one. Also disclosed are the compounds difluoro-2,5-dihydrothiophene-2,5-dione and tetrafluoro-2,5-dihydrothiophene-2-one. Difluoromaleic anhydride is useful for example as a component of fluoropolymers.
一种生产二氟马来酸酐的方法,包括将三氧化硫与来自以下组的氟化前体之一反应:六氟-2,5-二氢呋喃,六氟-2,5-二氢噻吩,二氟-2,5-二氢噻吩-2,5-二酮和四氟-2,5-二氢噻吩-2-酮。还披露了二氟-2,5-二氢噻吩-2,5-二酮和四氟-2,5-二氢噻吩-2-酮。二氟马来酸酐可用作氟聚合物的组分。