公开(公告)号：US5783731A

公开(公告)日：1998-07-21

申请号：US526338

申请日：1995-09-11

申请人： Darrell Andrew Fisher ,  Michael L. Karnilaw ,  Kenneth Paul Kidwell ,  Melchior Albert Meilchen ,  Valerie Santillan ,  Mark O. Scates ,  G. Paull Torrence ,  Richard F. Vogel, Jr. ,  R. Jay Warner

发明人： Darrell Andrew Fisher ,  Michael L. Karnilaw ,  Kenneth Paul Kidwell ,  Melchior Albert Meilchen ,  Valerie Santillan ,  Mark O. Scates ,  G. Paull Torrence ,  Richard F. Vogel, Jr. ,  R. Jay Warner

IPC分类号： C07C51/12 ,  C07B61/00 ,  C07C51/487 ,  C07C53/08

CPC分类号： C07C51/487

摘要： A process to reduce carbonyl impurities in a carbonylation reaction for the production of acetic acid is described. The methyl iodide recycle stream which is directed to a carbonylation reactor for carbonylating methanol or methyl acetate to acetic acid, is treated to remove carbonyl impurities by reacting the methyl iodide stream formed in the reaction with an aqueous amino compound which reacts with the carbonyls to form water soluble nitrogenous derivatives, separating an organic methyl iodide phase from an aqueous derivative phase and distilling the methyl iodide phase to remove heavier impurities. The treatment of the methyl iodide recycle stream to the carbonylation reactor has been found to greatly reduce the carbonyls present in the acetic acid product. The formation of nitrile from the nitrogenous derivative during distillation may be minimized by adding water to the system.

摘要翻译： 描述了在用于生产乙酸的羰基化反应中还原羰基杂质的方法。 通过使反应中形成的甲基碘流与与羰基反应形成的水性氨基化合物反应，将甲基碘循环流引导至用于使甲醇或乙酸甲酯转化为乙酸的羰基化反应器以除去羰基杂质 水溶性含氮衍生物，将有机甲基碘相与水相衍生物相分离并蒸馏甲基碘相以除去较重的杂质。 已经发现将甲基碘循环物流处理到羰基化反应器中大大减少了存在于乙酸产物中的羰基。 在蒸馏过程中从含氮衍生物形成腈可以通过向系统中加入水来最小化。