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    • 4. 发明申请
    • High water content tolerant process for the production of polyethers
    • 用于生产聚醚的高耐水含量方法
    • US20080021191A1
    • 2008-01-24
    • US11490303
    • 2006-07-20
    • Jack R. ReeseEdward P. BrowneJose F. Pazos
    • Jack R. ReeseEdward P. BrowneJose F. Pazos
    • C08G18/00
    • C08G18/4866C08G65/2663C08G65/2696
    • The present invention provides a process for the production of a polyether involving establishing oxyalkylation conditions in an oxyalkylation reactor in the presence of from about 5 ppm to about 1,000 ppm, based on the final polyether weight, of a double metal cyanide (DMC) catalyst, continuously introducing into the reactor at least one alkylene oxide and a low molecular weight starter having a number average molecular weight of less than about 300 Daltons (Da) containing from about 200 ppm to about 5,000 ppm water and acidified with from about 10 ppm to about 2,000 ppm of at least one of an inorganic protic mineral acid and an organic acid, and recovering a polyether product having a number average molecular weight of from about 200 Da to about 4,000 Da, wherein the ppm (parts per million) of water and acid are based on the weight of the low molecular weight starter. The inventive process may allow for the use of low molecular weight starters containing higher levels of water at lower DMC catalyst levels than current processes.
    • 本发明提供了一种制备聚醚的方法,包括在烷氧基化反应器中,在最终的聚醚重量为约5ppm至约1,000ppm的情况下,制备双金属氰化物(DMC)催化剂, 连续向反应器中引入至少一种数均分子量小于约300道尔顿(Da)的环氧烷和低分子量起始物,其含有约200ppm至约5,000ppm的水并用约10ppm至约 2,000ppm的无机质子性无机酸和有机酸中的至少一种,并回收数均分子量为约200Da至约4,000Da的聚醚产物,其中ppm(ppm / ppm)的水和酸 基于低分子量起始物的重量。 本发明的方法可以允许使用含有比当前方法更低的DMC催化剂水平的较高水平的水的低分子量起动器。
    • 7. 发明授权
    • Process for suppressing the foaming of an aqueous system
    • 抑制水性体系发泡的方法
    • US07001634B2
    • 2006-02-21
    • US10289579
    • 2002-11-07
    • Edward P. Browne
    • Edward P. Browne
    • A23L1/03
    • B01D19/0404
    • The present invention relates to a process for suppressing the foaming of an aqueous system which involves combining water and at least one defoamer composition which has a hydroxyl equivalent molecular weight of at least 4000 Da and a cloud point less than or equal to 30° C. in 1% aqueous solution.The high hydroxyl equivalent molecular weight defoamers of the present invention exhibit excellent defoaming properties at a low cloud point. Additionally, defoamers of the present invention exhibit defoaming properties which are better than those of defoamers having the same cloud point which are based on polyoxyalkylene copolymers prepared in the presence of potassium hydroxide.The superior defoaming properties of the defoamers of the present invention are particularly useful in the manufacture or processing of food items.
    • 本发明涉及一种抑制含水体系发泡的方法,该方法包括将水和至少一种具有至少4000Da的羟基当量分子量和浊点小于或等于30℃的消泡剂组合物组合。 在1%水溶液中。