| abstract |
The invention naphtha (naphtha) of 1,3-butadiene in the mixed C 4 stream (mixed C 4-s) produced in the cracking process of maleic anhydride and [2 + 4 Diels-Alder selectively to (Diels-Alder) reaction Removal to produce C 4 fraction-1 (C4 raffinate-1) in which isobutylene in the mixed C 4 class is available, while the useful product of Diels-Alder reaction 1,2,3,6-tetrahydro anhydride Phthalic acid (1,2,3,6-tetrahydrophthalic anhydride). |