Process for producing maleic anhydride

Details Process for producing maleic anhydride Process for producing maleic anhydride

1990-01-19

1991-06-25

Dentz, Bernard I.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549203, 549258, 549259, 549262, C07D30760

Patent

active

050268767

ABSTRACT:
Crude maleic anhydride produced by catalytic oxidation is distilled and then n-propyl gallate, cuprous chloride and zinc chloride are added thereto.
Alternatively, crude maleic anhydride is distilled in the presence of tridecyl phosphite. Further, these procedures can be used in combination. Thermal stability and color stability of the maleic anhydride is improved.

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