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US 4,480,124 AGranted
Process for the purifying of polytetramethylene ether glycol or corresponding diester
AssigneeBASF SE
InventorHerbert Mueller
Life of this patent
Estimating the term…
Abstract
The subject invention relates to a process for purifying polytetramethylene ether glycol or the corresponding diester prepared by cationic polymerization of tetrahydrofuran comprising treating said glycol or diester with hydrogen in the presence of a hydrogen catalyst. The resulting products have a low color number.
Claims3
A process for purifying polytetramethylene ether glycol or its corresponding diester prepared by the cationic polymerization of tetrahydrofuran comprising treating said polytetramethylene ether glycol or diester with hydrogen in the presence of a hydrogenation catalyst.
Dependencies are inferred from the claim text.