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US H1,703 HGranted
Removal of lithium from polymer cements
AssigneeShell Oil Company
InventorsJohn David Wilkey, Zaida Diaz, Dale Lee Handlin, Jr.
Life of this patent
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Abstract
A process for preparing a polymer cement which is relatively free of alkali metal salt by preparing the polymer cement with a polymerization terminating agent which is an acid which leaves alkali metal salt in the cement which is readily removable by centrifugation.
Claims9
A process for removing alkali metal compounds from a polymer cement comprising:
- preparing polymer cement of conjugated dienes with a polymerization terminating agent which is an acid selected from 2-ethylhexanoic acid, 12-hydroxyl stearic acid, oxalic acid, benzoic acid, and succinic acid and which leaves alkali metal salt in the cement;
- and
- removing the alkali metal salt from the polymer cement.
Dependencies are inferred from the claim text.