Aminonitrile production
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0384811
(2003-03-10)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- E. I. Dupont de Nemours and Company
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
8 |
초록
Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and a fluoride additive.
대표청구항
▼
1. A process for the partial hydrogenation of a dinitrile to an aminonitrile, comprising the step of contacting the dinitrile with a hydrogen-containing fluid in the presence of (a) a solvent comprising liquid ammonia, an alcohol or both; (b) a hydrogenation catalyst comprising a transition metal se
1. A process for the partial hydrogenation of a dinitrile to an aminonitrile, comprising the step of contacting the dinitrile with a hydrogen-containing fluid in the presence of (a) a solvent comprising liquid ammonia, an alcohol or both; (b) a hydrogenation catalyst comprising a transition metal selected from the group consisting of iron, cobalt, nickel, rhodium and combinations thereof; and (c) an effective amount of additive comprising a fluoride compound. 2. The process of claim 1, wherein the dinitrile has the general formula R(cN)2, wherein R is a hydrocarbylene group selected from the group consisting of an alkylene, arylene, alkenylene, alkarylene and aralkylene group.3. The process of claim 2, wherein R is an alkylene group containing from 2 to 25 carbon atoms.4. The process of claim 1, wherein the dinitrile is selected from the group consisting of adiponitrile, methyiglutaronitrile and alpha, omega-dodecanedinitrile.5. The process of claim 1, wherein the solvent is liquid ammonia.6. The process of claim 1, wherein the catalyst further comprises one or more promoters selected from the group consisting of Group VIB and Group VII metals.7. The process of claim 1, wherein the hydrogenation catalyst is in sponge metal form.8. The process of claim 1, wherein the transition metal is supported on an inorganic support.9. The process of claim 1, wherein the fluoride compound is selected from the group consisting of amine fluorides, ammonium fluorides and the hydrates thereof.10. The process of claim 1, wherein the weight ratio of additive to hydrogenation catalyst is in the range of from about 0.001:1 to about 0.5:1.11. The process of claim 1, wherein the hydrogenation catalyst is precontacted with the additive.12. An improved process for preparing an aminonitrile from a corresponding dinitrile by contacting the dinitrile with a hydrogen-containing fluid in the presence of a solvent and a hydrogenation catalyst comprising a transition metal selected from the group consisting of iron, cobalt, nickel, rhodium and combinations thereof, wherein the improvement comprises contacting the dinitrile, hydrogen-containing fluid, solvent and hydrogenation catalyst in the further presence of an effective amount of an additive comprising a fluoride compound. 13. The improved process of claim 12, wherein the dinitrile is selected from the group consisting of adiponitrile, methylglutaronitrile and alpha, omega-dodecanedinitrile.14. The improved process of claim 12, wherein the hydrogenation catalyst is in sponge metal form.15. The improved process of claim 12, wherein the transition metal is supported on an inorganic support.16. The improved process of claim 12, wherein the fluoride compound is selected from the group consisting of amine fluorides, ammonium fluorides and the hydrates thereof.17. The improved process of claim 12, wherein the weight ratio of additive to hydrogenation catalyst is in the range of from about 0.001:1 to about 0.5:1.18. The improved process of claim 12, wherein the hydrogenation catalyst is precontacted with the additive.19. A method for improving the yield of and/or selectivity to an aminonitrile obtained by partially hydrogenating a corresponding dinitrile with a hydrogen-containing fluid in the presence of a solvent and a hydrogenation catalyst comprising a transition metal selected from the group consisting of iron, cobalt, nickel, rhodium and combinations thereof, comprising the step of partially hydrogenating the dinitrile in the further presence of an effective amount of an additive comprising a fluoride compound.
이 특허에 인용된 특허 (8)
-
Ziemecki Stanislaw Bogdan ; Ionkin Alex Sergey, Aminonitrile production.
-
Alan M. Allgeier ; Theodore A. Koch ; Sourav K. Sengupta, Environmentally friendly process for the hydrogenation of dinitriles.
-
Sanchez Kathryn M. (West Chester PA), Preparation of 6-aminocapronitrile.
-
Flick Klemens (Herxheim DEX) Melder Johann-Peter (Mannheim DEX) Schnurr Werner (Herxheim DEX) Ebel Klaus (Lampertheim DEX) Witzel Tom (Ludwigshafen DEX) Harder Wolfgang (Weinheim DEX) Rehfinger Alwin, Preparation of aliphatic alpha, omega-aminonitriles.
-
Schnurr Werner (Herxheim DEX) Fischer Rolf (Heidelberg DEX) Bassler Peter (Viernheim DEX) Harder Wolfgang (Weinheim DEX), Preparation of aliphatic alpha, omega-aminonitriles.
-
Galle James E. (Madison NJ) Mares Frank (Whippany NJ) Diamond Steven E. (Springfield NJ) Corsi Jeffrey (Andover NJ) Regina Francis J. (Brooklyn NY), Selective hydrogenation of aliphatic dinitriles to omega-aminonitriles in ammonia with supported, finely dispersed rhodi.
-
Diamond Steven E. (New Providence NJ) Mares Frank (Whippany NJ) Szalkiewicz Andrew (New York NY), Selective hydrogenation of dinitrile to omega-aminonitrile and supported rhodium-containing catalyst therefor.
-
Ziemecki Stanislaw B. (Wilmington DE), Selective low pressure hydrogenation of a dinitrile to an aminonitrile.
이 특허를 인용한 특허 (1)
-
Laprade, Jean-Paul; Albenice, Philip J.; Donatelli, Jean; Geurtsen, John W., Laminate with a heat-activatable expandable layer.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.