Process for producing aromatic sulfide polymer with alkaline earth metal oxide dehydrating agent
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsYukichika Kawakami, Zenya Shiiki, Yo Iizuka
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Abstract
The improvement in a process for producing an aromatic sulfide polymer from (A) hydrous sulfide of an alkali or alkaline earth metal and (B) a dihalo-aromatic compound is disclosed. The improvement is concerned with how the hydrous sulfide is dehydrated and comprises dehydrating the hydrous sulfide by the action thereon of (C) an alkaline earth metal oxide before substantial formation of the aromatic sulfide polymer.
Claims8
In a process for producing an aromatic sulfide polymer which comprises subjecting (A) a hydrous sulfide of a metal selected from the group consisting of alkali metals and alkaline earth metals and (B) a dihalo-aromatic compound to a reaction in an aprotic solvent to form the aromatic sulfide polymer, the improvement which comprises contacting in the aprotic solvent the hydrous sulfide (A) with an effective amount of (C) an alkaline earth metal oxide before said reaction between the reactants (A) and (B) is substantially initiated thereby to dehydrate the hydrous sulfide (A).
Dependencies are inferred from the claim text.