公开(公告)号：US3855078A

公开(公告)日：1974-12-17

申请号：US40864573

申请日：1973-10-23

Applicant: HOECHST AG

Inventor： SCHMIDT A ,  FRIEDRICH G ,  HECK G

IPC: C07C27/28 ,  C07C27/00 ,  C07C27/32 ,  C07C29/84 ,  C07C67/00 ,  C07C69/145 ,  C07C69/15 ,  C08F6/04 ,  C08F6/10 ,  B01D3/40 ,  C07C67/06

CPC classification number: C07C29/84 ,  B01D3/40 ,  C07C67/54 ,  Y10S203/10 ,  C07C31/04 ,  C07C69/15

Abstract: A process for the separation of mixtures of vinyl acetate and methanol containing minor amounts of impurities is provided. Vinyl acetate is separated from the mixture by extractive distillation with a benzene or napthalene hydrocarbon derivative whereas methanol is recovered from the overhead product by distillation.

Abstract translation: 提供了分离含有少量杂质的乙酸乙烯酯和甲醇的混合物的方法。 通过用苯或萘烃衍生物萃取蒸馏将乙酸乙烯酯与混合物分离，通过蒸馏从塔顶馏出物中回收甲醇。

公开(公告)号：DE2252276C2

公开(公告)日：1974-10-03

申请号：DE2252276

申请日：1972-10-25

Applicant: HOECHST AG

Inventor： SCHMIDT A ,  FRIEDRICH G ,  HECK G

IPC: C07C69/15 ,  C08F6/04 ,  C08F6/10 ,  C07C69/14 ,  C08F1/96

公开(公告)号：DE2252276B1

公开(公告)日：1974-01-31

申请号：DE2252276

申请日：1972-10-25

Applicant: HOECHST AG

Inventor： SCHMIDT A ,  FRIEDRICH G ,  HECK G

IPC: C07C69/15 ,  C08F6/04 ,  C08F6/10 ,  C07C69/14

Abstract: Recovery of vinyl acetate (I) from mixts. of (I) and MeOH contaminated with MeOAc and MeCHO by extractive distn. comprises : (a) separating the mixt., opt. also contg. H2O, into a top prod. of MeOH, MeOAc, MeCHO and small amts. of extractant (II) and (I) and a sump. prod. of (II) and (I), (II) being a benzene or naphthalene deriv. contg. only C and H, which is liq. at normal temp., boils above 100 degrees C and contains a polymerisation inhibitor (III), and (b) separating the sump prod. into (I) as top prod. and (II) as sump prod. (I) is obtd. in very pure form, which is esp. free from aldehydes and (III) and thus is suitable for the mfr. of high mol. polyvinyl acetate. Partic. suitable reagents are (II) 1,2,4-trimethylbenzene, (III) phenthizine.