摘要:
Alkyl tert-alkyl ethers are cleaved into the corresponding isoolefins and alkanols by a process comprising acid-catalyzed reactive distilling an alkyl tert-alkyl ether fed into the reaction zone of a reactive distillation apparatus as an azeotrope of the alkyl tert-alkyl ether and the corresponding alkanol, wherein the reactive distillation apparatus is configured from bottom to top as a bottom zone, at least one distillation zone and a reaction zone. The process is suitable for the cleavage of primary, secondary and tertiary alkyl tert-alkyl ethers, in particular MTBE.
摘要:
A catalyst support comprising silicates is described. This catalyst support has a lower aluminum content than naturally occurring sheet silicates and can be used in the hydration of C2 and C3 olefins to produce C2 and C3 alcohols. A method for the production of the catalyst support and a process for hydrating C2 and C3 olefins are also described. One advantage of this catalyst support is the reduction in aluminum leaching that occurs when this catalyst is used in the presence of phosphoric acid.
摘要翻译:描述了包含硅酸盐的催化剂载体。 该催化剂载体的铝含量比天然存在的片状硅酸盐低,可用于C 2 O 3和C 3 O 3烯烃的水合以产生C 2 SUB和C 3醇。 还描述了制备催化剂载体的方法和水合C 2和C 3 O 3烯烃的方法。 该催化剂载体的一个优点是当在磷酸存在下使用该催化剂时,铝浸出的减少。
摘要:
What is claimed is a dealuminated catalyst carrier, a process for producing a catalyst carrier with reduced aluminum content based on naturally occurring lattice-layer silicates, such as, for example, montmorillonite, as well as a process for the hydration reaction of C2- or C3-olefins in which said catalyst carrier with reduced aluminium content is used. For acid-catalysed hydration reaction the catalyst carrier is impregnated with phosphoric acid. The improvements according to the invention of the hydration reaction compared to conventional processes include the fact that no aluminium is leached out of the carrier in the presence of the phosphoric acid. As a result no more blockage of the succeeding apparatus due to aluminium phosphate is expected.
摘要:
What is claimed is a dealuminated catalyst carrier, a process for producing a catalyst carrier with reduced aluminium content based on naturally occurring lattice-layer silicates, such as, for example, montmorillonite, as well as a process for the hydration reaction of C2- or C3-olefins in which said catalyst carrier with reduced aluminium content is used. For acid-catalysed hydration reaction the catalyst carrier is impregnated with phosphoric acid. The improvements according to the invention of the hydration reaction compared to conventional processes include the fact that no aluminium is leached out of the carrier in the presence of the phosphoric acid. As a result no more blockage of the succeeding apparatus due to aluminum phosphate is expected.
摘要:
Disclosed is a method for the preparation of cumene by reacting isopropanol or a mixture of isopropanol and propene with benzene in the presence of a β-zeolite catalyst having a SiO2/Al2O3 molar ratio greater than 10:1 that can be integrated in a process for preparing phenol, which comprises preparing cumene as described above, oxidizing cumene to cumene hydroperoxide, acid-catalyzed cleavage of cumene hydroperoxide to give phenol and acetone, and hydrogenating acetone to form isopropanol.
摘要翻译:公开了一种在具有SiO 2 Al 2 O 3摩尔比大于10:1的β-沸石催化剂存在下,使异丙醇或异丙醇和丙烯的混合物与苯反应来制备异丙基苯的方法,其可以与制备苯酚的方法相结合 ,其包括如上所述制备枯烯,将异丙基苯氧化成氢过氧化枯烯,酸催化裂解氢过氧化枯烯,得到苯酚和丙酮,并加氢丙酮以形成异丙醇。
摘要:
The present invention is directed to a process for the acid-catalyzed cracking of tertiary butyl alcohol in a reaction distillation column. The advantage of the process of the present invention compared with conventional processes is that the two-phase, liquid-liquid region of the tertiary system TBA/water/isobutene is avoided and a high space-time yield is achieved. This is achieved by the arrangement of the catalyst pack above the liquid phase zone (bottom) and by the use of a dephlegmator thus achieving the isolation of isobutene of high purity.