Reducing copper corrosiveness of organic polysulfides
AssigneeEthyl Petroleum Additives, Inc.
InventorsEdmund F. Perozzi, Andrew G. Papay
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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.
Claims33
A process of reducing the copper corrosiveness of dihydrocarbyl polysulfide that is corrosive toward copper which comprises treating such dihydrocarbyl polysulfide with an alkali metal-containing or alkaline earth metal-containing substance capable of dissolving elemental sulfur, such treatment being effected in a liquid reaction medium composed of a mixture of water and at least one water-soluble alcohol, whereby the treated dihydrocarbyl polysulfide is less corrosive toward copper.
In a process of treating dialkyl polysulfide with an alkaline inorganic substance capable of dissolving elemental sulfur, the improvement which comprises conducting such treatment in a liquid reaction medium comprising water and a water-soluble alkanol such that the resultant dialkyl polysulfide exhibits reduced copper corrosiveness.
Dependencies are inferred from the claim text.