色が改善された水素化ポリマーを調製する方法

Title:

色が改善された水素化ポリマーを調製する方法

Document Type and Number:

Japanese Patent JP4458683

Kind Code:

B2

Abstract:

This invention is a process comprising the steps of contacting an alkali metal initiator and Group VIII metal hydrogenation catalyst residue containing polymer solution (which is often referred to as the polymer cement) with water and carbon dioxide or an aqueous solution of an inorganic acid such as phosphoric or sulfuric acid and further contacting the solution with ammonia wherein at least one mole of both water and carbon dioxide are added per mole of alkali metal, or at least one mole of acidic protons from the inorganic acid is added per mole of alkali metal, the water or the aqueous acid solution are added at less than 15 percent by weight based on the polymer solution in order to prevent fast settling, and ammonia is added so that the pH of the aqueous phase is between 9 and 12.

Inventors:

The Ellis, Litchiard

Application Number:

JP2000616249A

Publication Date:

April 28, 2010

Filing Date:

May 04, 2000

Export Citation:

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