发明名称 |
Process for Producing Meth( Acrylic) Acid or (Meth) Acrolein |
摘要 |
A producing method of (meth)acrolein or (meth)acrylic acid where by use of a multi-tubular reactor that has a plurality of reaction tubes filled with a catalyst, catalytic gas phase oxidation of propylene, propane, isobutylene or (meth)acrolein is carried out in the presence of a composite oxide catalyst by use of molecular oxygen or a gas containing molecular oxygen, in which method (meth)acrolein or (meth)acrylic acid can be obtained stably in high yield for a long period of time without allowing the activity of the catalyst to decrease locally (disproportionately) and extremely. A temperature difference between a temperature of a heat medium at the beginning of operation and a peak temperature of the catalyst is set in a range of 20 to 80° C., and during operations a change of the peak temperature T of the catalyst in a tube axis direction is maintained in a definite range.
|
申请公布号 |
US2007208201(A1) |
申请公布日期 |
2007.09.06 |
申请号 |
US20040547004 |
申请日期 |
2004.10.27 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
OGAWA YASUSHI;YADA SHUHEI;SUZUKI YOSHIRO;TAKASAKI KENJI;JINNO KIMIKATSU |
分类号 |
C07C51/16;C07B61/00;C07C27/14;C07C45/35;C07C47/22;C07C51/215;C07C51/235;C07C51/25;C07C57/05;C07C57/055 |
主分类号 |
C07C51/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|