摘要:
Di-, tri- and tetra-substituted epoxides are isomerized to allylic alcohols in the presence of a metal alkoxide catalyst in which the metal is selected from early transition metals of Groups 1VA and VA and in the absence of a solvent.
摘要:
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.
摘要:
Alkylene oxide adducts of organic compounds having an active hydrogen are prepared by a process in which an active hydrogen reactant and an alkylene oxide reactant are reacted in the presence of a catalytically effective amount of one or more bimetallic oxo compounds of the formula (RO).sub.n M--O--M'--O--M(OR).sub.n, wherein each R is (independently) an optionally-substituted organic moiety, M' is a divalent metal selected from the elements of Groups VIII, Ib, IIb, IIIb, and IVb of the Periodic Table, each M is (independently) a trivalent or tetravalent metal, and each n is 2 if the adjacent M is trivalent of 3 if the adjacent M is tetravalent. The products are useful, for instance, as nonionic surfactants in detergent formulations. In certain preferred embodiments, the process yields a product having a very desirable distribution of alkylene oxide adducts.
摘要:
Alkylene oxide adducts of organic compounds having an active hydrogen are prepared by a process in which an active hydrogen reactant and an alkylene oxide reactant are reacted in the presence of a catalytically effective amount of one or more bimetallic oxo compounds of the formula (RO).sub.n M--O--M'--O--M(OR).sub.n, wherein each R is (independently) an optionally-substituted organic moiety, M' is a divalent metal selected from the elements of Groups Va, VIa, and VIIa of the Periodic Table, each M is (independently) a trivalent or tetravalent metal, and each n is 2 if the adjacent M is trivalent of 3 if the adjacent M is tetravalent. The products are useful, for instance, as nonionic surfactants in detergent formulations. In certain preferred embodiments, the process yields a product having a very desirable distribution of alkylene oxide adducts.
摘要:
Thiol alkoxylates having utility, for instance, an nonionic surfactants in detergent formulations are prepared by the reaction of alkane thiols with alkylene oxides in the presence of a catalytically effective amount of one or more basic alkoxylation catalysts and additionally in the presence of as a reaction promoter added thiol alkoxylate having in the alkoxylate molecule from one to about 30 adducts of one or more alkylene oxides. The presence of the added thiol alkoxylate promoter improves the handling of the reaction mixture and facilitates the production of thiol alkoxylates having low content of polyalkylene glycol byproduct.
摘要:
Alkanol alkoxylates having utility, for instance, as nonionic surfactants in detergent formulations are prepared by the reaction of C.sub.6 to C.sub.30 alkanols with C.sub.2 to C.sub.4 alkylene oxides in the presence of a catalytically effective amount of one or more soluble basic compounds of magnesium and additionally in the presence of as a reaction activator at least about 2 percent by mole, calculated on moles of alkanol, of alkoxylates of one or more C.sub.1 to C.sub.30 alkanols having in the alkoxylate molecules from one to about 30 adducts of one or more alkylene oxides selected from the class consisting of C.sub.2 to C.sub.4 alkylene oxides.
摘要:
Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalytically effective amount of one or more compounds of one or more of the rare earth elements. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.
摘要:
Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalytically effective amount of one or more of the phosphate salts of the rare earth elements. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.
摘要:
Certain mixtures of the ethylene oxide adducts of higher carbon number tertiary thiols, having a reduced content of free thiols and lower (i.e., 1 to 3 mol) ethylene oxide adducts, exhibit improved detergency performance, particularly in high temperature laundry applications.
摘要:
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 phosphorus-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 2.5:1. 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.