Process for the preparation of acids

Details Process for the preparation of acids Process for the preparation of acids

1983-10-25

1989-08-01

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

260413, 562606, C07C 5112, C07C 5308, C07C 53126

Patent

active

048534820

ABSTRACT:
A carboxylic acid of formula RCO.sub.2 H where R is a C.sub.1 to C.sub.10 aliphatic hydrocarbyl group is prepared by heating under substantially anhydrous conditions an ester of formic acid of formula HCO.sub.2 R where R is as defined above in the presence of carbon monoxide and an effective amount of a catalyst system comprising a Group VIII metal, a halide and a compound containing a quaternary Group V atom. The quaternary Group V atom can be formed in situ by adding a compound containing a trivalent nitrogen, phosphorus or arsenic atom quaternizable under the reaction conditions and a quaternizing agent. Acetic acid is prepared by heating methyl formate in the presence of a catalyst system containing a rhodium compound, an iodide and a quaternary nitrogen-containing heterocyclic base.

REFERENCES:
patent: 3839428 (1974-10-01), Isogai

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