Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1988-06-02
1990-06-12
Mars, Howard T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568620, C07C 4103
Patent
active
049335022
ABSTRACT:
An improved process for the preparation of narrow-range alkanol alkoylates by the addition reaction of higher alkanols with alkylene oxides, particularly ethylene oxide. U.S. Pat. No. 4,721,816 describes a process in which alkylene oxides are added to alkanols by reaction in the presence of a catalyst prepared by contacting a sulfur-containing acid such as sulfuric acid with one or more aluminum compounds selected from the group consisting of aluminum alcoholates and aluminum phenolates. Under the present invention, that process is improved by carrying out the process in the further presence of water, provided that certain critical restrictions are placed upon the proportions of the water and of the sulfuric acid and aluminum catalyst components. The process improvement of the invention offers substantial improvement in alkoxylation reaction rate and/or selectivity of the reaction to the desired alkanol alkoxylate products, rather than to by-products such as polyalkylene glycols. The narrow-range alkanol alkoxylate products of the process of the invention have utility, for instance, as nonionic surfactant components of detergent formulations.
REFERENCES:
patent: 4721816 (1988-01-01), Edwards
Mars Howard T.
Shell Oil Company
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