Spent acid recycle in methacrylic acid or ester manufacture

Details Spent acid recycle in methacrylic acid or ester manufacture Spent acid recycle in methacrylic acid or ester manufacture

C - Chemistry, Metallurgy

07

C

260/482.6, 260/5

C07C 57/04 (2006.01) C07C 51/06 (2006.01) C07C 69/54 (2006.01) C07C 231/06 (2006.01)

Patent

CA 1332424

- 12 - TITLE SPENT ACID RECYCLE IN METHACRYLIC ACID OR ESTER MANUFACTURE ABSTRACT OF THE DISCLOSURE Improvement of yield and reduction in virgin sulfuric acid needs is methacrylamide formation during the two-stage preparation of methacrylic acid or its alkyl esters by recycling spent acid either as produced or after its water content has been reduced. - 12 -

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