JPS5446712A - Treatment of reaction vessel for preparation of maleic acid anhydride - Google Patents

Treatment of reaction vessel for preparation of maleic acid anhydride

Info

Publication number
JPS5446712A
JPS5446712A JP11221677A JP11221677A JPS5446712A JP S5446712 A JPS5446712 A JP S5446712A JP 11221677 A JP11221677 A JP 11221677A JP 11221677 A JP11221677 A JP 11221677A JP S5446712 A JPS5446712 A JP S5446712A
Authority
JP
Japan
Prior art keywords
reaction vessel
preparation
maleic anhydride
carbon steel
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11221677A
Other languages
Japanese (ja)
Inventor
Yoshio Umemura
Kyoji Odan
Fumihiko Sakai
Yasuo Bando
Masataka Fujinaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP11221677A priority Critical patent/JPS5446712A/en
Publication of JPS5446712A publication Critical patent/JPS5446712A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain maleic anhydride in high yield inhibiting oxidation of the starting material and the product be wetting the inner part of the reaction vessel made of carbon steel used for preparation of the maleic anhydride with an aqueous solution of phosphoric acid or its salt.
CONSTITUTION: Maleic anhydride is prepard by the catalytic gaseous oxidation of an unsaturated or saturated-hydrocarbon in the presence of molecular oxygen in a reaction vessel packed with a catalyst for the preparation of maleic anhydride, wherein the inner part of the reaction vessel made of carbon steel (including carbon steel pipes for piping, pressure piping, etc.) is treated with 0.5W15wt%, preferably 1W10wt% aqueous solution of phosphoric acid or its salt (e.g. Fe(Zn) phosphinate, Mg phosphate, etc.) at normal temp. to 100°C, preferably 50W95°C for ca. 10min.
COPYRIGHT: (C)1979,JPO&Japio
JP11221677A 1977-09-20 1977-09-20 Treatment of reaction vessel for preparation of maleic acid anhydride Pending JPS5446712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11221677A JPS5446712A (en) 1977-09-20 1977-09-20 Treatment of reaction vessel for preparation of maleic acid anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11221677A JPS5446712A (en) 1977-09-20 1977-09-20 Treatment of reaction vessel for preparation of maleic acid anhydride

Publications (1)

Publication Number Publication Date
JPS5446712A true JPS5446712A (en) 1979-04-12

Family

ID=14581153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11221677A Pending JPS5446712A (en) 1977-09-20 1977-09-20 Treatment of reaction vessel for preparation of maleic acid anhydride

Country Status (1)

Country Link
JP (1) JPS5446712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5326886A (en) * 1991-12-09 1994-07-05 The Standard Oil Company Maintaining VPO catalyst performance by aluminizing reactor internals in oxidation of butane to maleic anhydride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5326886A (en) * 1991-12-09 1994-07-05 The Standard Oil Company Maintaining VPO catalyst performance by aluminizing reactor internals in oxidation of butane to maleic anhydride

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