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    • 5. 发明授权
    • Product recovery process in the filtration of polyether polyols
    • 产品回收过程中过滤聚醚多元醇
    • US09040754B2
    • 2015-05-26
    • US14233018
    • 2012-07-17
    • Robert B. OsborneWillard L. Quon
    • Robert B. OsborneWillard L. Quon
    • C07C41/34C07C41/46C08G65/20C08G65/30
    • C07C41/34C07C41/46C08G65/20C08G65/30
    • An improved method for recovering a purified polyether polyol comprising the steps of providing an aqueous solution of a polyether polyol containing an alkali metal catalyst residual formed from a transesterification process, contacting the aqueous solution with a stoichiometric excess of magnesium sulfate to form a second aqueous solution, removing water from said second aqueous solution at a temperature above the melt temperature of said polyether polyol to produce a dehydrated slurry containing a molten polyether polyol phase essentially free of residual alkali metal and a precipitated solid phase comprising sulfate and/or sulfite salts of the alkali metal catalyst, magnesium hydroxide, and excess magnesium sulfate and/or sulfide, passing the dehydrated slurry of through a filtration system comprising a filtration press to separate the molten polyether polyol phase from the precipitated solid phase, wherein the filtration press is treated with a filter aid that is essentially free of transition metal oxide content, separating the molten polyether polyol phase substantially free of water, residual alkali metal catalyst and transition metal contaminants from the precipitated solid phase and recovering polyether polyol from the separated polyether polyol phase.
    • 一种用于回收纯化的聚醚多元醇的改进方法,包括以下步骤:提供含有由酯交换方法形成的碱金属催化剂残余物的聚醚多元醇水溶液,使该水溶液与化学计量过量的硫酸镁接触以形成第二水溶液 在高于所述聚醚多元醇的熔融温度的温度下从所述第二水溶液中除去水,以产生含有基本上不含残余碱金属的熔融聚醚多元醇相的脱水浆料和包含硫酸盐和/或亚硫酸盐的沉淀固相 碱金属催化剂,氢氧化镁和过量的硫酸镁和/或硫化物,使脱水的浆料通过包括过滤机的过滤系统,以将熔融的聚醚多元醇相与沉淀的固相分离,其中过滤机用 基本上免费的助滤剂o f过渡金属氧化物含量,从沉淀的固相中分离基本上不含水的熔融聚醚多元醇相,残留的碱金属催化剂和过渡金属污染物,并从分离的聚醚多元醇相回收聚醚多元醇。
    • 6. 发明申请
    • PRODUCT RECOVERY PROCESS IN THE FILTRATION OF POLYETHER POLYOLS
    • 聚醚多元醇过滤中的产物回收过程
    • US20140303405A1
    • 2014-10-09
    • US14233018
    • 2012-07-17
    • Robert B. OsborneWillard L. Quon
    • Robert B. OsborneWillard L. Quon
    • C07C41/34
    • C07C41/34C07C41/46C08G65/20C08G65/30
    • An improved method for recovering a purified polyether polyol comprising the steps of providing an aqueous solution of a polyether polyol containing an alkali metal catalyst residual formed from a transesterification process, contacting the aqueous solution with a stoichiometric excess of magnesium sulfate to form a second aqueous solution, removing water from said second aqueous solution at a temperature above the melt temperature of said polyether polyol to produce a dehydrated slurry containing a molten polyether polyol phase essentially free of residual alkali metal and a precipitated solid phase comprising sulfate and/or sulfite salts of the alkali metal catalyst, magnesium hydroxide, and excess magnesium sulfate and/or sulfide, passing the dehydrated slurry of through a filtration system comprising a filtration press to separate the molten polyether polyol phase from the precipitated solid phase, wherein the filtration press is treated with a filter aid that is essentially free of transition metal oxide content, separating the molten polyether polyol phase substantially free of water, residual alkali metal catalyst and transition metal contaminants from the precipitated solid phase and recovering polyether polyol from the separated polyether polyol phase.
    • 一种用于回收纯化的聚醚多元醇的改进方法,包括以下步骤:提供含有由酯交换方法形成的碱金属催化剂残余物的聚醚多元醇水溶液,使该水溶液与化学计量过量的硫酸镁接触以形成第二水溶液 在高于所述聚醚多元醇的熔融温度的温度下从所述第二水溶液中除去水,以产生含有基本上不含残余碱金属的熔融聚醚多元醇相的脱水浆料和包含硫酸盐和/或亚硫酸盐的沉淀固相 碱金属催化剂,氢氧化镁和过量的硫酸镁和/或硫化物,使脱水的浆料通过包括过滤机的过滤系统,以将熔融的聚醚多元醇相与沉淀的固相分离,其中过滤机用 基本上免费的助滤剂o f过渡金属氧化物含量,从沉淀的固相中分离基本上不含水的熔融聚醚多元醇相,残留的碱金属催化剂和过渡金属污染物,并从分离的聚醚多元醇相回收聚醚多元醇。