Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1981-01-30
1986-10-21
Garner, Vivian
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562536, 562538, 562545, 562548, 562600, 562608, 568470, 568471, 568476, 568492, C07C 5125, C07C 5148, C07C 5705, C07C 57055
Patent
active
046187090
ABSTRACT:
A process for separation of methacrylic acid from a methacrylic acid-containing, gaseous reaction mixture obtained by subjecting methacrolein or a compound which can afford methacrolein under reaction conditions and molecular oxygen to gas phase reaction in the presence of a catalyst for oxidation under the coexistence of an inert gas for dilution which comprises (a) cooling the gaseous reaction mixture from a reactor wherein the gas phase reaction has been effected to separate into condensable components including methacrylic acid, acetic acid and water vapor as a condensed liquor and non-condensable components including methacrolein as a non-condensed gaseous mixture, (b) eliminating contaminating methacrolein from the condensed liquor and (c) contacting the resulting condensed liquor with an organic solvent to extract methacrylic acid, followed by separation into an organic solvent solution including methacrylic acid and an aqueous solution as waste water, characterized in that (1) the inert gas for dilution is a non-condensable gas or its mixture with water vapor and (2) the aqueous solution ultimately separated is evaporated and the evolved vapor is subjected to catalytic combustion with molecular oxygen, whereby the amount of waste water to be discharged is much suppressed.
REFERENCES:
patent: 3781332 (1973-12-01), Sato et al.
"Make MMA from Spent-BB", by Hasuike et al., Hydrocarbon Processing, Feb. 1979, pp. 105-107.
Abe Tadashi
Ayano Masami
Kato Michio
Moriwaki Masanori
Sada Masao
Garner Vivian
Sumitomo Chemical Company Limited
LandOfFree
Waste water treatment in the production of methacrylic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Waste water treatment in the production of methacrylic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waste water treatment in the production of methacrylic acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1290943