Process for the preparation of mercaptoalcohols

Details Process for the preparation of mercaptoalcohols Process for the preparation of mercaptoalcohols

1990-01-10

1991-01-15

Gray, Bruce

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

Organic compounds

Carboxylic acid esters

562432, 568 62, C07C33100

Patent

active

049855867

ABSTRACT:
This invention relates to improvement to a process for the preparation of mercaptoalcohols containing, more particularly, up to 24 carbon atoms and, preferably, more than 3 carbon atoms, by reaction of the corresponding vicinal epoxides with hydrogen sulphide.
The process comprises incorporating into the reaction mixture a catalyst comprising a guanidine and/or of organic derivatives of a guanidine, and/or of guanidine salts, in particular of guanidine salts. The catalyst can be either in liquid and/or solid form, depending on the nature of the catalyst and its solubility in the reaction mixture, or fixed and/or impregnated into various solid materials. The materials can be organic in nature such as neutral and/or basic polymer resins, polymers or copolymers, or can be inorganic in nature such as alumninas, silicas, aluminosilicates, zeolites, active charcoals, oxides and/or metal salts.
This process enables mercaptoalcohols to be obtained in a high overall yield while permitting relatively short reaction times.

REFERENCES:
patent: 3290383 (1966-12-01), Pflugfelder et al.
patent: 3394192 (1968-07-01), Jones
patent: 3462496 (1969-08-01), Fletcher et al.
patent: 3662004 (1972-05-01), Umbach et al.
patent: 3775463 (1973-11-01), Fischer et al.
patent: 4281202 (1981-07-01), Buchholz et al.
patent: 4398042 (1983-08-01), Kleemann et al.
patent: 4493938 (1985-01-01), Shimamoto et al.
patent: 4564710 (1985-06-01), Steger

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