Barium oxide/cresylic acid catalyzed ethoxylation
Patent 4210764 Issued on July 1, 1980. Estimated Expiration Date: 
May 4, 1999. 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.
May 4, 1999. 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 3475499 3644535 InventorsAssigneeApplicationNo. 06/036273 filed on 05/04/1979US Classes:568/618, Preparing from organic hydroxy containing compound (H of -OH may be replaced by a Group IA or IIA light metal)568/678Hydroxy containing (H of -OH may be replaced by a Group IA or IIA light metal)ExaminersPrimary: Mars, Howard T.Attorney, Agent or FirmInternational ClassesC07C 41/00 (20060101)C07C 41/03 (20060101) AbstractCresylic acid (phenol or alkylated phenols) is used to promote barium oxide or hydroxide which is used as an ethoxylation catalyst for the reaction of ethylene oxide and alkanols of all classes. The reaction is carried out at temperatures of from about 150° to about 200° C. to yield the ethoxylated product. The product obtained has a very narrow high adduct distribution with low levels of by-products and unreacted free alcohols. Calcium and magnesium oxides show negligible catalytic effect. |
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