公开(公告)号：WO2015013427A1

公开(公告)日：2015-01-29

申请号：PCT/US2014/047851

申请日：2014-07-23

Applicant: INVISTA TECHNOLOGIES S.à.r.l.

Inventor： TOZER, Ferdie J. ,  FORSYTH, Stewart

IPC: C07C209/48 ,  C07C211/09 ,  C07C211/12

CPC classification number: C07C209/48 ,  C07C211/12 ,  C07C211/09

Abstract: Disclosed is a process for extending the useful life of a hydrogenation catalyst for making diamines in which 2-methylglutaronitrile and adiponitrile are charged separately to the catalyst in sequence with an intervening step of contacting the catalyst with hydrogen and ammonia at elevated temperature.

Abstract translation: 公开了一种延长制备二胺的氢化催化剂的使用寿命的方法，其中将2-甲基戊二腈和己二腈分别加入到催化剂中，并在高温下使催化剂与氢气和氨接触的中间步骤。

公开(公告)号：WO2014099613A1

公开(公告)日：2014-06-26

申请号：PCT/US2013/074699

申请日：2013-12-12

Applicant: INVISTA TECHNOLOGIES S.À.R.L.

Inventor： FORSYTH, Stewart ,  LIU, Aiguo ,  RENNER, Martin, J. ,  STAHLMAN, Brent, J.

IPC: C01C3/02

CPC classification number: C01C3/0212

Abstract: The invention provides an oxygen Andrussow process for production of hydrogen cyanide from a methane-containing feedstock such as natural gas in the presence of oxygen and ammonia over a platinum catalyst, wherein the production of byproduct organonitrile impurities, such as acrylonitrile, is reduced. Limiting the content of C 2 + hydrocarbons in the methane feedstock in the oxygen Andrussow process, in contrast to the air Andrussow process, has been found to reduce formation of organonitriles, such as acrylonitrile. The organonitrile impurities can require additional processing for removal, cause fouling of equipment, and can also contribute to hydrogen cyanide polymerization. Reduction of C 2 + hydrocarbon levels to less than 2 wt%, or 1 wt%, or less than 0.1 wt%, in the methane can provide an improved yield of higher purity HCN. Reduction of C 2 + hydrocarbon levels also solves the problem of polymer buildup in process equipment, reducing downtime required for cleaning when higher C 2 + hydrocarbon levels are present in the reaction feed.

Abstract translation: 本发明提供了一种用于在铂催化剂上在氧和氨存在下从含甲烷的原料例如天然气生产氰化氢的氧气Andrussow方法，其中副产物有机腈杂质如丙烯腈的生产被还原。 已经发现，与空气Andrussow方法相反，限制了氧气Andrussow方法中甲烷原料中的C2 +烃的含量，以减少有机腈如丙烯腈的形成。 有机腈杂质可能需要额外的除去处理，造成设备污染，也可能导致氰化氢聚合。 在甲烷中将C2 +烃水平降低至小于2重量％，或1重量％或小于0.1重量％可提供更高纯度HCN的提高的产率。 降低C2 +烃水平也解决了工艺设备中聚合物积聚的问题，当反应进料中存在较高的C2 +烃含量时，可减少清洗所需的停机时间。