Reducing copper corrosiveness of organic polysulfides

Details Reducing copper corrosiveness of organic polysulfides Reducing copper corrosiveness of organic polysulfides

1989-11-13

1992-12-29

Kyle, Deborah L.

Compositions

Preservative agents

Anti-corrosion

25238961, 25238962, 422 7, 568 21, C07C32112, C07C32114, C07C32120

Patent

active

051749220

ABSTRACT:
The invention provides a process of reducing the copper corrosiveness of dihydrocarbyl polysulfides by treating them with an alkali metal-containing or alkaline earth metal-containing substance capable of dissolving elemental sulfur (e.g., sodium hydroxide, sodium sulfide, etc.). The process is conducted in a liquid reaction medium composed of a mixture of water and at least one water-soluble alcohol. Experiments have shown that it is possible by use of this process to reduce the copper corrosiveness to a level below that exhibited by a product formed by treating the same initial dihydrocarbyl polysulfide in the same way but in a liquid medium composed solely of water.

REFERENCES:
patent: 2218997 (1940-10-01), Wasson
patent: 2521870 (1950-09-01), Proell
patent: 2708199 (1955-05-01), Eby
patent: 3471404 (1969-10-01), Myers
patent: 4645610 (1987-02-01), Born et al.
patent: 4827040 (1989-05-01), Labat et al.
patent: 4954274 (1990-09-01), Zaweski et al.

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