Process for preparation of dithiols

Details Process for preparation of dithiols Process for preparation of dithiols

1988-12-22

1990-07-24

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

568 57, 568 70, C07C14800

Patent

active

049436627

ABSTRACT:
The invention relates to the synthesis of dithiols and more particularly that of .alpha.,.omega.-dithiols having 5 to 20 carbon atoms.
The process according to the invention comprises reacting a di-(tertiary-alkylthio)alkane with hydrogen sulphide in the presence of a solid acid catalyst. The alkane dithiol is obtained selectively and a tertiary-alkyl mercaptan is obtained as by-product. It is possible to reuse the latter in a cyclical process to produce the original di-(tertiary-alkylthio)alkane.

REFERENCES:
patent: 3069472 (1962-12-01), Loev et al.
patent: 3591475 (1971-07-01), Griesbaum et al.
patent: 3686326 (1972-08-01), Oswald et al.
patent: 4140604 (1979-02-01), Dimmig
patent: 4233128 (1980-11-01), Allivier et al.
patent: 4313006 (1982-01-01), Hager
patent: 4396778 (1983-08-01), Hager

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