Process of quenching reaction product gas containing methacrylic acid and method of treating quenched liquid.
摘要
<p>To recover methacrolein and/or methacrylic acid by quenching a reaction product gas obtained by catalytic oxidation of isobutylene or the like, the reaction product gas is charged into a quench column through a double-wall pipe and is then brought into contact with a condensate as a cooling medium. Deposition of terephthalic acid and the like inside the column is prevented by controlling the temperature of a bottom in the quench column and that of an overhead gas of a quench column unit. An aromatic carboxylic acid, aromatic aldehyde and/or metal powder such as stainless steel powder is added to an aqueous solution of methacrylic acid, which contains terephthalic acid and the like, so that the terephthalic acid and the like are caused to precipitate for their removal.</p>
申请公布号
EP0297788(A2)
申请公布日期
1989.01.04
申请号
EP19880305764
申请日期
1988.06.24
申请人
MITSUI TOATSU CHEMICALS, INCORPORATED;KYOWA GAS CHEMICAL INDUSTRY CO., LTD.