Preparation of organic polysulfide polymers using heavy residues

Details Preparation of organic polysulfide polymers using heavy residues Preparation of organic polysulfide polymers using heavy residues

1975-07-07

1977-05-24

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 336R, 260 338R, 260 37R, 260 79, 427388R, 428450, C08G 7516

Patent

active

040254950

ABSTRACT:
A process for abating a waste disposal problem in the manufacture of vinyl chloride wherein 1,2 dichlorethane is an intermediate and a heavy residue is recovered as still bottoms, said process comprising reacting said heavy residue at 50.degree. to 100.degree. C., in aqueous medium with an alkali metal or an alkaline earth metal polysulfide, the proportion of polysulfide being equal at least to 30% by weight of the molar theoretical quantity, the average sulfur rank of polysulfide being more than 1 and up to and including 5, the pH of the reaction medium not exceeding 10.5 when the reaction is completed, and the obtained precipitate being separated from the reaction mother liquor, said precipitate being valuable organic polysulfide polymers containing 4-80% by weight of sulfur.

REFERENCES:
patent: 2466963 (1949-04-01), Patrick et al.
patent: 3111545 (1963-11-01), Nobis et al.

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