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    • 8. 发明授权
    • Production by distillation of acetone cyanhydrin and method for producing methacrylic ester and subsequent products
    • 通过蒸馏丙酮氰醇生产和生产甲基丙烯酸酯及其后续产品的方法
    • US08143434B2
    • 2012-03-27
    • US12517673
    • 2007-08-31
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • C07C253/00
    • C07C253/00C07C67/20C07C231/06C07C231/14C07C69/54C07C255/16C07C233/09
    • The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture; C. discharging at least a portion of the acetone cyanohydrin obtained from the reactor; D. continuously distilling the discharged acetone cyanohydrin obtained to obtain an acetone cyanohydrin bottom product and an acetone top product in a distillation column; E. recycling at least a portion of the acetone top product into step A, the acetone top product being kept at less than 60° C. during the recycling, to a process for preparing an alkyl methacrylate, to a process for preparing methacrylic acid, to an apparatus for preparing alkyl methacrylates, to a process for preparing polymers based at least partly on alkyl methacrylates, to the use of the alkyl methacrylates obtainable from the process according to the invention in chemical products, and to chemical products based on the alkyl methacrylates obtainable by the processes according to the invention.
    • 本发明总体上涉及制备丙酮氰醇的方法,其包括如下步骤:A.在反应器中使丙酮和氢氰酸接触,得到反应混合物,使反应混合物循环,得到丙酮氰醇; B.冷却至少一些反应混合物; C.排出从反应器获得的至少一部分丙酮氰醇; D.在蒸馏塔中连续蒸馏得到的丙酮氰醇,得到丙酮氰醇底部产物和丙酮顶部产物; E.将至少一部分丙酮顶部产物再循环到步骤A中,丙酮顶部产物在回收期间保持在低于60℃,制备甲基丙烯酸烷基酯的方法,制备甲基丙烯酸的方法, 涉及制备甲基丙烯酸烷基酯的装置,至少部分地基于甲基丙烯酸烷基酯制备聚合物的方法,可以使用可从化学产品中得到的本发明方法得到的甲基丙烯酸烷基酯,以及基于甲基丙烯酸烷基酯的化学产物 可通过根据本发明的方法获得。
    • 10. 发明申请
    • PRODUCTION BY DISTILLATION OF ACETONE CYANHYDRIN AND METHOD FOR PRODUCING METHACRYLIC ESTER AND SUBSEQUENT PRODUCTS
    • 乙腈氰化氢的生产及生产甲基丙烯酸酯及其后续产品的方法
    • US20100069594A1
    • 2010-03-18
    • US12517673
    • 2007-08-31
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • Udo GroppRobert WeberThomas SchaeferAndreas PerlRudolf SingThomas Mertz
    • C08F20/10C07C253/30C07C67/22C07C51/06B01J19/00
    • C07C253/00C07C67/20C07C231/06C07C231/14C07C69/54C07C255/16C07C233/09
    • The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture; C. discharging at least a portion of the acetone cyanohydrin obtained from the reactor; D. continuously distilling the discharged acetone cyanohydrin obtained to obtain an acetone cyanohydrin bottom product and an acetone top product in a distillation column; E. recycling at least a portion of the acetone top product into step A, the acetone top product being kept at less than 60° C. during the recycling, to a process for preparing an alkyl methacrylate, to a process for preparing methacrylic acid, to an apparatus for preparing alkyl methacrylates, to a process for preparing polymers based at least partly on alkyl methacrylates, to the use of the alkyl methacrylates obtainable from the process according to the invention in chemical products, and to chemical products based on the alkyl methacrylates obtainable by the processes according to the invention.
    • 本发明总体上涉及制备丙酮氰醇的方法,其包括如下步骤:A.在反应器中使丙酮和氢氰酸接触,得到反应混合物,使反应混合物循环,得到丙酮氰醇; B.冷却至少一些反应混合物; C.排出从反应器获得的至少一部分丙酮氰醇; D.在蒸馏塔中连续蒸馏得到的丙酮氰醇,得到丙酮氰醇底部产物和丙酮顶部产物; E.将至少一部分丙酮顶部产物再循环到步骤A中,丙酮顶部产物在回收期间保持在低于60℃,制备甲基丙烯酸烷基酯的方法,制备甲基丙烯酸的方法, 涉及制备甲基丙烯酸烷基酯的装置,至少部分地基于甲基丙烯酸烷基酯制备聚合物的方法,可以使用可从化学产品中得到的本发明方法得到的甲基丙烯酸烷基酯,以及基于甲基丙烯酸烷基酯的化学产物 可通过根据本发明的方法获得。