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PROCESS FOR ETHYL ACETATE PRODUCTION

机译:乙酸乙酯的生产过程

摘要

PURPOSE: Oxidation of liquid ethanol in the presence of excess liquid ethanol and a supported oxidation catalyst provides a one step process for production of ethyl acetate. CONSTITUTION: A present invention provides a single step, single vessel conversion of ethanol to ethyl acetate. The first part of the process is the partial oxidation of part of the ethanol to acetic acid by oxygen (or air), and the second part is the esterification of the acetic acid with a second part of the ethanol. The first reaction is catalyzed by a palladium type catalyst, while the second reaction proceeds spontaneously or can be catalyzed by a solid ion exchange resin in the acid form. The catalysts can be mixed so that the reactions proceed in parallel, or separated so that the reactions proceed sequentially. The products of reaction are limited to ethyl acetate, acetic acid, acetaldehyde and water. The feed ethanol can be either pure ethanol or commercial ethanol (constant boiling or lower purity). The reaction system is well suited for a trickle bed catalytic type process. Because water is present, the oxidation reaction is enhanced if the oxidation catalyst, Pd, is supported on a hydrophobic carrier.
机译:目的:在过量液体乙醇和负载型氧化催化剂存在下,液体乙醇的氧化提供了一步法生产乙酸乙酯。组成:本发明提供了乙醇到乙酸乙酯的一步,单容器转化。该方法的第一部分是一部分乙醇被氧气(或空气)部分氧化为乙酸,第二部分是乙酸与第二部分乙醇的酯化反应。第一反应由钯型催化剂催化,而第二反应自发进行或可以由酸形式的固体离子交换树脂催化。可以混合催化剂以使反应平行进行,或分离以使反应顺序进行。反应产物限于乙酸乙酯,乙酸,乙醛和水。进料乙醇可以是纯乙醇或市售乙醇(恒沸或较低纯度)。该反应系统非常适合滴流床催化型工艺。因为存在水,所以如果将氧化催化剂Pd负载在疏水性载体上,则氧化反应会增强。

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