Preparation of methyltris(m-sulfonatophenyl) phosphonium iodide

Details Preparation of methyltris(m-sulfonatophenyl) phosphonium iodide Preparation of methyltris(m-sulfonatophenyl) phosphonium iodide

1994-01-06

1995-04-04

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

562522, C07C 5112, C07F 954

Patent

active

054039541

ABSTRACT:
In a process for preparing methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt, the sodium salt of trisulfonated triphenylphosphine and methanol are introduced as the initial charge, a solution of methyl iodide in methanol is added dropwise at elevated temperature, and after an additional reaction time the reaction product is evaporated to dryness in vacuo.
Methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt can be used to prepare carboxylic acids and/or their esters by carbonylation of saturated aliphatic alcohols having from 1 to 20 carbon atoms or their halo, ester or ether derivatives over a rhodium catalyst in the presence of water and methyl iodide under a CO partial pressure of from 0.3 to 200 bar at a temperature of from 100.degree. to 240.degree. C., provided methyltris(m-sulfonatophenyl)phosphonium iodide trisodium salt and carboxylic acid are added to the liquid phase prior to carbonylation.

REFERENCES:
patent: 4483804 (1984-11-01), Rizkalla
patent: 4536354 (1985-08-01), Drent
patent: 4625058 (1986-11-01), Fujiwa et al.
patent: 5026907 (1991-06-01), Wegman et al.
patent: 5214203 (1993-05-01), Koyama et al.

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