Process for preparing nonionic surfactants-oxyalkylation with calcium and/or strontium catalysts
Patent 4453022 Issued on June 5, 1984. Estimated Expiration Date: 
April 21, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 21, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3100750 3328306 Barium oxide/cresylic acid catalyzed ethoxylation Ethoxylation with strontium bases Inorganic catalyst for alkoxylation of alcohols Patent #: 4302613 InventorsApplicationNo. 06/370204 filed on 04/21/1982US Classes:568/618, Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal)568/619, From polyhydroxy containing compound568/620, And cyclic ether568/622, Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal)568/623, Polyhydroxy containing568/624, Plural diverse oxyalkylene groups containing568/625Plural diverse oxyalkylene groups containingExaminersPrimary: Mars, Howard T.Attorney, Agent or FirmInternational ClassesC07C 41/00 (20060101)C07C 41/03 (20060101) C08G 65/00 (20060101) C08G 65/26 (20060101) AbstractThe process for preparing nonionic surfactants wherein a narrower molecular weight distribution is obtained by the use of a calcium and/or strontium catalyst which comprises reacting a reactive hydrogen compound selected from the group consisting of monohydric alcohols having from about 8 to about 20 carbon atoms and a difunctional polypropylene oxide polymer having an average molecular weight in the range of 1000 to 5000 with an alkylene oxide having 2 to 4 carbon atoms at a temperature at which the reaction proceeds in the presence of at least a catalytic amount of a basic salt of calcium and/or strontium selected from the group consisting of hydroxide, alkoxide and phenoxides and a catalytic amount of an oxyalkylation catalyst promoter. |
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