JPS56113732A - Preparation of methacrylic acid - Google Patents

Preparation of methacrylic acid

Info

Publication number
JPS56113732A
JPS56113732A JP1575480A JP1575480A JPS56113732A JP S56113732 A JPS56113732 A JP S56113732A JP 1575480 A JP1575480 A JP 1575480A JP 1575480 A JP1575480 A JP 1575480A JP S56113732 A JPS56113732 A JP S56113732A
Authority
JP
Japan
Prior art keywords
methacrylic acid
gas
reactor
isobutylene
concentration
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.)
Granted
Application number
JP1575480A
Other languages
Japanese (ja)
Other versions
JPS6217580B2 (en
Inventor
Yoshiaki Kimura
Shigeru Mogi
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.)
Nippon Kayaku Co Ltd
Original Assignee
Nippon Kayaku Co 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 Nippon Kayaku Co Ltd filed Critical Nippon Kayaku Co Ltd
Priority to JP1575480A priority Critical patent/JPS56113732A/en
Publication of JPS56113732A publication Critical patent/JPS56113732A/en
Publication of JPS6217580B2 publication Critical patent/JPS6217580B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To reduce the amount of steam, specify the concentration of fine solid particles in the inlet gas of a reactor in the former stage and prolong the life of a catalyst, by circulating part of the outlet gas of a reactor as a diluent in obtaining methacrylic acid through the catalytic vapor phase oxidation of isobutylene, etc. in two stages.
CONSTITUTION: Isobutylene or a hydrocarbon mixture consisting of the isobutylene essentially or t-butyl alcohol is oxidized in the vapor phase catalytically in two stages to prepare methacrylic acid. After the reaction, the outlet gas from a reaction in the latter stage is fed into a condensing apparatus to collect condensible components, e.g. methacrylic acid or water. The remaining waste gas is partly circulated through the oxidation reactor in the former stage instead of steam. The concentration of fine solid particles in the inlet gas of the reactor is adjusted to 0.5g/Nm3 or below, preferably 0.1g/Nm3 or below. The volume of the gas to be circulted for use is usually 5W90% based on the outlet gas. The concentration of the fine solid particles, e.g. methacrylic acid, adjusted to the value described above prevents the adsorption of the fine particles to the surface of the catalyst.
COPYRIGHT: (C)1981,JPO&Japio
JP1575480A 1980-02-12 1980-02-12 Preparation of methacrylic acid Granted JPS56113732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1575480A JPS56113732A (en) 1980-02-12 1980-02-12 Preparation of methacrylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1575480A JPS56113732A (en) 1980-02-12 1980-02-12 Preparation of methacrylic acid

Publications (2)

Publication Number Publication Date
JPS56113732A true JPS56113732A (en) 1981-09-07
JPS6217580B2 JPS6217580B2 (en) 1987-04-18

Family

ID=11897555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1575480A Granted JPS56113732A (en) 1980-02-12 1980-02-12 Preparation of methacrylic acid

Country Status (1)

Country Link
JP (1) JPS56113732A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925981A (en) * 1982-01-22 1990-05-15 Nippon Shokubai Kagaku Kogyo Co., Ltd. Method of isolating methacrylic acid
US4954650A (en) * 1988-07-11 1990-09-04 Sumitomo Chemical Company, Ltd. Method for production of methacrylic acid
JP2001163828A (en) * 1999-12-06 2001-06-19 Nippon Shokubai Co Ltd Method for preventing scale from adhering

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925981A (en) * 1982-01-22 1990-05-15 Nippon Shokubai Kagaku Kogyo Co., Ltd. Method of isolating methacrylic acid
US4954650A (en) * 1988-07-11 1990-09-04 Sumitomo Chemical Company, Ltd. Method for production of methacrylic acid
JP2001163828A (en) * 1999-12-06 2001-06-19 Nippon Shokubai Co Ltd Method for preventing scale from adhering

Also Published As

Publication number Publication date
JPS6217580B2 (en) 1987-04-18

Similar Documents

Publication Publication Date Title
CS138091A3 (en) Process for removing nitrogen from waste gases at simultaneous obtaining nitrogen acid
CN107010709A (en) Method for purifying high-concentration phenol-containing wastewater in production process of o/hydroquinone
JPS56113732A (en) Preparation of methacrylic acid
EP0873967A3 (en) Method of and apparatus for removing carbon monoxide from gaseous media
DE60012546D1 (en) METHOD FOR PURIFYING ACRYLIC ACID PRODUCED BY OXIDATION OF PROPYLENE AND / OR ACROLEIN
JPS54119371A (en) Removing method for malodor
JPS5422319A (en) Prepaeation of methacrylic acid
JPS57102835A (en) Preparation of acetic acid from ethanol or acetaldehyde
JPS5896039A (en) Manufacture of isobutyric acid or alkyl ester thereof
JPS5315314A (en) Production of acrylic acid by catalytic vapor phase oxidation of propylene
JPS5586584A (en) Wet oxidizing treatment of waste water
JPS5515611A (en) Multistage spray tower
JPS5742654A (en) Preparation of dimethyl oxalate
SU766626A1 (en) Method for purifying off-gases from methanol
JPS565119A (en) Activated carbon tower
JPS54151932A (en) Preparation of ubiquinone
NO992412D0 (en) Process for the preparation of saturated carboxylic acids having 1-4 C atoms and apparatus for use in the process
JPS534774A (en) Apparatus for regeneration of absorption solution in wet hydrogen sulfide-removal unit
JPS58146899A (en) Method of processing radioactive ion exchange resin waste
JPS5594624A (en) Deodorizing method for malodorant
JPS55134695A (en) Treatment in urine/feces sanitation tank sewage
JPS577443A (en) Separation of 3-pentenoic ester
JPS5712825A (en) Reaction apparatus
JPS5444605A (en) Preparation of methanol
JPS54151560A (en) Co containing air cleaner