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。

公开(公告)号：EP2874946A1

公开(公告)日：2015-05-27

申请号：EP13735514.5

申请日：2013-06-24

Applicant: Invista Technologies S.à.r.l.

Inventor： MICKA, Thomas, A. ,  RENNER, Martin, J.

IPC: C01C1/12 ,  C01C3/02 ,  B01D53/14 ,  B01D53/58 ,  B01D53/96

CPC classification number: C01C1/12 ,  B01D53/14 ,  B01D53/1425 ,  B01D53/18 ,  B01D53/58 ,  B01D53/96 ,  B01D2251/60 ,  B01D2251/608 ,  B01D2251/61 ,  B01D2257/406 ,  C01C3/0212 ,  C01C3/022

Abstract: The present invention relates to reduction of corrosion. The present invention includes a method of decreasing corrosion during ammonia extraction. The method includes performing a process to extract ammonia using ammonia extraction equipment. The ammonia extraction equipment includes an ammonia absorber, an ammonia desorber, and an aqueous solution. The aqueous solution includes an acid or an ammonium salt thereof. The method also includes sparging an oxygen-containing gas into the solution in the ammonia absorber, the ammonia desorber, or therebetween. The invention also provides a system that can perform the method.

公开(公告)号：EP2935110A1

公开(公告)日：2015-10-28

申请号：EP13812439.1

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方法相比，限制了氧气Andrussow方法中甲烷原料中的C 2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处理以除去设备的结垢，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％可以提高更高纯度HCN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，减少反应进料中较高的C2 +烃含量时清洗所需的停机时间。

公开(公告)号：EP2935094A1

公开(公告)日：2015-10-28

申请号：EP13814358.1

申请日：2013-12-12

Applicant: Invista Technologies S.à.r.l.

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

IPC: C01B3/56 ,  C01C3/02

CPC classification number: B01D53/047 ,  B01D2253/102 ,  B01D2253/106 ,  B01D2253/108 ,  B01D2253/116 ,  B01D2256/16 ,  B01D2257/406 ,  B01D2257/408 ,  C01B3/56 ,  C01B2203/0233 ,  C01B2203/0405 ,  C01B2203/0415 ,  C01B2203/043 ,  C01B2203/0465 ,  C01B2203/0495 ,  C01B2203/1676 ,  C01C3/0212

Abstract: A method and a system for recovering hydrogen from a process for making hydrogen cyanide are described herein. In the method, hydrogen is recovered from a gaseous waste stream of an Andrussow process. The method comprises the following steps: (a) adjusting a reaction mixture comprising methane, ammonia and oxygen to provide the reaction mixture with sufficient oxygen to generate a gaseous waste stream that has at least 40% hydrogen after removal of ammonia and recovery of hydrogen cyanide; and(b) removing components from the gaseous waste stream to generate recovered hydrogen.

公开(公告)号：EP2935111A1

公开(公告)日：2015-10-28

申请号：EP13812442.5

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 ,  B01D53/86

CPC classification number: C01C3/0216 ,  C01C3/0212 ,  C01C3/022

Abstract: Processes and systems for the production of hydrogen cyanide via the Andrussow process are described. A reaction zone, wherein oxygen, ammonia, and methane can be allowed to react in the presence of a catalyst comprising platinum to provide hydrogen cyanide. A desulfurization zone, wherein a feed stream comprising sulfur and at least one of the oxygen, the ammonia, and the methane can be contacted with a desulfurization material to produce a sulfur- reduced feed stream that is provided to the reaction zone. In an example, the desulfurization material includes zinc oxide.

公开(公告)号：EP2935110B1

公开(公告)日：2017-10-04

申请号：EP13812439.1

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

公开(公告)号：EP2935112A1

公开(公告)日：2015-10-28

申请号：EP13812443.3

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 ,  B01D53/26 ,  F26B21/08

CPC classification number: C01C3/0212 ,  B01D53/26 ,  C01C3/022

Abstract: The system and methods described herein solve problems of inaccurate flow control, loss of optimum reactant gas feed ratios, and the associated inefficiencies brought on by variable humidity in reactant feedstream gases during production of hydrogen cyanide by an Andrussow process.

Abstract translation: 本文描述的系统和方法解决了通过安德鲁斯（Andrussow）工艺生产氰化氢期间反应物进料流中不可逆湿度引起的流量控制不正确，最佳反应气进料比的损失。