Nonionic emulsifier and substituted succinic anhydride compositions therewith
This patent describes an emulsifier prepared by the process which comprises heating the reaction product of: a hydrocarbyl-substituted succinic anhydride having from 12 to 25 carbon atoms in the substituent; and a nonionic water-soluble compound having from 1 to 3 groups reactive to anhydrides, wherein the water-soluble compound has sufficient hydrophilic strength to give a balanced oil-in-water emulsifier; and wherein the reaction product contains a free carboxyl group and a substituted carboxyl group per each reacted anhydride molecule; under conditions sufficient to remove the free carboxyl group. A stable hydrocarbyl-substituted succinic anhydride/nonionic emulsifier composition comprising: 70 to 99.5% of a normally liquid hydrocarbyl-substituted succinic anhydride having from 12 to 25 carbon atoms in the substituent; and 0.5 to 30% of an emulsifier prepared by the process which comprises heating the reaction product of a hydrocarbyl-substituted succinic anhydride having from 12 to 25 carbon atoms in the substituent and a nonionic water-soluble compound having 1 to 3 groups reactive to anhydrides, wherein the water-soluble compound has sufficient hydrophilic strength to give as balanced oil-in-water emulsifier; and wherein the reaction product contains a free carboxyl group and a substituent carboxyl group per each reacted anhydride molecule; under conditions sufficient to remove the free carboxyl group.
- Assignee:
- Chevron Research Co., San Francisco, CA
- Patent Number(s):
- US 4849131
- Application Number:
- PPN: US 7-106741A
- OSTI ID:
- 5455145
- Country of Publication:
- United States
- Language:
- English
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