Method of inhibiting cuprene formation in ethynylation reaction

Details Method of inhibiting cuprene formation in ethynylation reaction Method of inhibiting cuprene formation in ethynylation reaction

1978-07-31

1979-04-10

Evans, Joseph E.

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

Organic compounds

Oxygen containing

C07C 2900

Patent

active

041490045

ABSTRACT:
When acetylene flow to the continuous, aqueous ethynylation reaction of formaldehyde and acetylene, using a copper acetylide complex as the catalyst, is interrupted, resulting cuprene formation can be inhibited by maintaining the reaction mass at a pH of 3.5-5 until normal acetylene flow is resumed.

REFERENCES:
patent: 3560576 (1971-02-01), Kirchner
patent: 4002694 (1977-01-01), Hort
patent: 4093668 (1978-06-01), Reiss et al.

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