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    • 8. 发明授权
    • Process for preparing acrylic acid from methanol and acetic acid
    • 从甲醇和乙酸制备丙烯酸的方法
    • US09593065B2
    • 2017-03-14
    • US14794955
    • 2015-07-09
    • BASF SE
    • Lukas SchulzNicolai Tonio WoerzTim BlaschkeMarco HartmannFrank Huetten
    • C07C51/347B01J23/50B01J27/198C07C57/04C07C45/38C07C51/353C07C45/32C07C45/78
    • C07C51/347B01J23/50B01J27/198C07C45/32C07C45/38C07C45/783C07C51/353C07C57/04C07C47/04
    • A process for preparing acrylic acid from methanol and acetic acid, comprising (i) contacting a gaseous stream S0 comprising methanol, oxygen and inert gas with an oxidation catalyst to obtain a gaseous stream S1 comprising formaldehyde and inert gas; (ii) removing at least a portion of the inert gas present in S1 from at least a portion of the formaldehyde present in S1 by absorbing this formaldehyde in an absorbent to obtain a gaseous stream S2 comprising the portion of the inert gas removed, and to obtain a stream S3 comprising absorbent and absorbate comprising formaldehyde; (iii) optionally removing a portion or the entirety of the absorbent present in stream S3, such that a stream S3a remains from stream S3, and producing a stream S4 from at least stream S3 or stream S3a and a stream S5 comprising acetic acid; and (iv) contacting stream S4 in gaseous form with an aldol condensation catalyst to obtain a gaseous stream S6 comprising acrylic acid.
    • 一种从甲醇和乙酸制备丙烯酸的方法,包括(i)使包含甲醇,氧气和惰性气体的气流S0与氧化催化剂接触以获得包含甲醛和惰性气体的气流S1; (ii)通过在吸收剂中吸收该甲醛从S1中存在的甲醛的至少一部分除去S1中存在的至少一部分惰性气体,以获得包含去除部分惰性气体的气流S2,并且 获得包含含甲醛的吸收剂和吸收剂的流S3; (iii)任选地除去流S3中存在的吸收剂的一部分或全部,使得流S3a从流S3保留,并从至少流S3或流S3a和包含乙酸的流S5产生流S4; 和(iv)将气态的流S4与醛醇缩合催化剂接触以获得包含丙烯酸的气流S6。