MANUFACTURE OF UNSATURATED ALDEHYDE FROM CORRESPONDING ALKANE,申请号JP19830066282-传众专利搜索

MANUFACTURE OF UNSATURATED ALDEHYDE FROM CORRESPONDING ALKANE

申请公布号：JPS58189130(A)

申请号：JP19830066282

申请日期：1983.04.14

申请公布日期：1983.11.04

申请人：

HALCON INTERN INC

发明人：SAAJISU KUUBIAA

分类号：C07C45/34;B01J23/00;B01J27/192;B01J27/199;C07B61/00;C07C5/333;C07C45/00;C07C45/33;C07C45/35;C07C45/37;C07C47/21;C07C47/22;C07C51/25;C07C67/00

主分类号：C07C45/34

摘要：Isobutane is converted to methacrolein in an integrated two-step process wherein isobutane is dehydrogenated in a first step to isobutylene, hydrogen, and by-products and the reaction effluent is passed directly into a second step where isobutylene is oxidized to methacrolein without significant oxidation of the hydrogen and by-products. The methacrolein and by-products may be separated and the unreacted isobutylene and isobutane recycled to the first step. Alternatively, the effluent from the second step may be used as feed to a further oxidation step for conversion of methacrolein to methacrylic acid. In one embodiment, the hydrogen produced in the first step is oxidized using the excess oxygen from the second step under conditions selected to avoid loss of the C4 components. In an alternative embodiment, the unreacted isobutane and isobutylene are absorbed and separated from the remaining components before being recycled to the first step.