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US 4,721,816 AGranted
Preparation of nonionic surfactants
AssigneeShell Oil Company
InventorCharles L. Edwards
Life of this patent
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AssigneeShell Oil Company
InventorCharles L. Edwards
Estimating the term…
Alkylene oxide adducts of higher alkanols are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more C.sub.2 to C.sub.4 vicinal alkylene oxides with an alkanol reactant comprising one or more C.sub.6 to C.sub.30 alkanols in the presence of a catalytically effective amount of a catalyst which combines (i) one or more sulfur-containing acids with (ii) one or more aluminum compounds selected from the group consisting of aluminum alcoholates and aluminum phenolates, the relative molar ratio of component (i) to component (ii) being in the range from about 0.1:1 to 1:1. Alkanol alkoxylates, and particularly alkanol ethoxylates, prepared in this manner are characterized by a relatively narrow-range distribution of alkylene oxide adducts and by a relatively low content of residual alkanol. The products of this process are nonionic surfactants, particularly useful as components of detergent formulations.
A process for the preparation of an alkanol alkoxylate product characterized by a narrow-range alkylene oxide adduct distribution and by a low content of residual alcohol, which comprises contacting and reacting an alkylene oxide reactant comprising one or more C.sub.2 to C.sub.4 vicinal alkylene oxides with an alkanol reactant comprising one or more C.sub.6 to C.sub.30 alkanols in the presence of a catalytically effective amount of a catalyst prepared by contacting (i) one or more sulfur-containing acids selected from the group consisting of sulfuric acid, sulfur trioxide, and C.sub.1 to C.sub.30 alkyl sulfuric acids, and (ii) one or more aluminum compounds selected from the group consisting of aluminum alcoholates and aluminum phenolates, the molar ratio of (i) to (ii) being in the range from about 0.1:1 to 2:1.
A process for the preparation of an alkanol ethoxylate product characterized by a narrow-range alkyle oxide adduct distribution and by a low content of residual alcohol, which comprises contacting and reacting an alkylene oxide reactant consisting essentially of ethylene oxide with an alkanol reactant consisting essentially of one or more C.sub.8 to C.sub.20 primary mono-hydric alkanols in the presence of a catalytically effective amount of a catalyst prepared by contacting (i) one or more sulfur-containing acids selected from the group consisting of sulfuric acid, sulfur trioxide, and C.sub.1 to C.sub.30 alkyl sulfuric acids, and (ii) one or more aluminum compounds of the formula ##STR5## wherein at least one of X.sup.1, X.sup.2, and X.sup.3 represents an --OR moiety, wherein R is selected from the group consisting of C.sub.1 to C.sub.30 alkyl, phenyl and alkyl substituted phenyl moieties, the molar ratio of (i) to (ii) being in the range from about 0.3:1 to 1:1.
A process for the preparation of an alkanol ethoxylate product characterized by a narrow-range ethylene oxide adduct distribution and by a low content of residual alkanol, which comprises contacting and reacting ethylene oxide with an alkanol reactant comprising one or more C.sub.9 to C.sub.18 primary mono-hydric alkanols in the presence of a catalytically effective amount of a catalyst prepared by contacting (i) one or more sulfur containing acids selected from the group consisting of sulfuric acid, sulfur trioxide, and C.sub.1 to C.sub.30 alkyl sulfuric acids and (ii) one or more aluminum compounds selected from the group consisting of aluminum alcoholate compounds of the formula Al(OR).sub.3, wherein each R represents an alkyl moiety having a carbon number in the range from 1 to about 30, the molar ratio of (i) to (ii) being in the range from about 0.3:1 to 1:1.
Dependencies are inferred from the claim text.