公开(公告)号：CA2293010A1

公开(公告)日：2000-06-24

申请号：CA2293010

申请日：1999-12-22

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： VELLOSO ANTONIO AUGUSTO M ,  WAGNER MATTHEW LINCOLN ,  ECHEGARAY DIEGO FERNANDEZ

IPC: C07D201/06 ,  C07D201/10 ,  C07D223/10

Abstract: A method for production of caprolactam. The method involves: (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide; (b) oxidizing at least a portion of the nitric oxide to nitrogen dioxide to produce an NO x-rich process gas stream; (c) reactively absorbing the NO x-rich gas stream with phosphoric acid containing solution in an absorption zone to form nitrate ions; (d) contacting the nitrate ions with air in a degassing zone to produce a nitrate-rich aqueous process stream; (e) reducing the nitrate-rich aqueous stream with hydrogen in the presence of phosphoric acid to produce hydroxylammonium phosphate; (f) oximating the hydroxylammonium phosphate with cyclohexanone to produce cyclohexanone oxime; and (g) converting the cyclohexanone oxime to caprolactam. According to the invention, supplemental oxygen is added downstream of the ammonia conversion zone to increase the quantity and rate of formation of nitrogen dioxide in the NO x-rich process gas stream.

公开(公告)号：PL305815A1

公开(公告)日：1996-05-13

申请号：PL30581594

申请日：1994-11-09

Applicant: ZAKLADY AZOTOWE W TARNOWIE MOS

Inventor： MALINOWSKA MAGDALENA ,  JANICKA DANUTA ,  MACISZEWSKI LESZEK ,  KURAS ANTONI ,  MALEC JOZEF

IPC: C07D201/06 ,  C07D223/10

公开(公告)号：ES2048098B1

公开(公告)日：1995-11-16

申请号：ES9200849

申请日：1992-04-22

Applicant: QUIMICOS DEL MEDITERRANEO S A

Inventor： GARCIA ZURBANO LUIS ,  DEL PINO PEREZ MIGUEL

IPC: C07D201/06 ,  C07D223/10 ,  C07D225/02

公开(公告)号：DE3363337D1

公开(公告)日：1986-06-12

申请号：DE3363337

申请日：1983-02-12

Applicant: STAMICARBON

Inventor： FRENKEN PETRUS MATHIAS GERARDU

IPC: C07D201/04 ,  B01J21/16 ,  B01J29/04 ,  B01J29/40 ,  B01J29/86 ,  B01J37/30 ,  C07B61/00 ,  C07C1/00 ,  C07C2/00 ,  C07C2/76 ,  C07C15/00 ,  C07C67/00 ,  C07D201/06

Abstract: Disclosed is a method for selectively deactivating catalytically active sites which occur only on the surface of a zeolite of boralite catalyst. Active sites occurring on the interior of the pores are masked by saturating the catalyst with an organic compound which fills substantially the whole of the catalyst pore volume. The catalyst so treated is then exposed to a deactivating agent, such as a solution of an alkali metal salt which is substantially immiscible with, substantially insoluble in, and which is otherwise unreactive to said pore-filling compound. The catalyst is then treated to drive off the pore-filling compound, yielding a catalyst selectively deactivated only on the external surface, but which is not deactivated within the pores. The treatment enables the catalyst to be used for e.g. hydrocarbon conversion for long time periods without carbon buildups around the pore entrances, which buildup would otherwise either restrict entry into the pores by reactants or exit therefrom by product.

公开(公告)号：CA1190203A

公开(公告)日：1985-07-09

申请号：CA421750

申请日：1983-02-16

Applicant: STAMICARBON

Inventor： FRENKEN PETRUS M G

IPC: C07D201/04 ,  B01J21/16 ,  B01J29/04 ,  B01J29/40 ,  B01J29/86 ,  B01J37/30 ,  C07B61/00 ,  C07C1/00 ,  C07C2/00 ,  C07C2/76 ,  C07C15/00 ,  C07C67/00 ,  C07D201/06 ,  B01J29/28

Abstract: Disclosed is a method for selectively deactivating catalytically active sites which occur only on the surface of a zeolite of boralite catalyst. Active sites occurring on the interior of the pores are masked by saturating the catalyst with an organic compound which fills substantially the whole of the catalyst pore volume. The catalyst so treated is then exposed to a deactivating agent, such as a solution of an alkali metal salt which is substantially immiscible with, substantially insoluble in, and which is otherwise unreactive to said porefilling compound. The catalyst is then treated to drive off the pore-filling compound, yielding a catalyst selectively deactivated only on the external surface, but which is not deactivated within the pores. The treatment enables the catalyst to be used for e.g. hydrocarbon conversion for long time periods without carbon buildups around the pore entrances, which buildup would otherwise either restrict entry into the pores by reactants or exit therefrom by product.

公开(公告)号：GT198302734A

公开(公告)日：1984-12-25

申请号：GT198302734

申请日：1983-07-04

IPC: C07D501/00 ,  A01N43/44 ,  A61K20060101 ,  A61K31/395 ,  A61K31/46 ,  A61K31/545 ,  A61K31/546 ,  C07D20060101 ,  C07D201/06 ,  C07D201/14 ,  C07D205/08 ,  C07D241/08 ,  C07D501/12 ,  C07D501/24 ,  C07D501/34 ,  C07D501/36 ,  C07D501/56

公开(公告)号：DE2837793A1

公开(公告)日：1980-03-13

申请号：DE2837793

申请日：1978-08-30

Applicant: BASF AG

Inventor： FUCHS HUGO DIPL CHEM DR ,  BRAND UWE ING GRAD ,  GROSSKINSKY OTTO-ALFRED DIPL C ,  SCHMITZ RUEDIGER DIPL ING

IPC: C07D201/04 ,  C07D201/06

公开(公告)号：NL159965C

公开(公告)日：1979-09-17

申请号：NL6716887

申请日：1967-12-12

Applicant: BAYER AG

IPC: B01J27/02 ,  B01J27/053 ,  B01J27/18 ,  C07D201/04 ,  C07D201/06

公开(公告)号：BG23323A1

公开(公告)日：1977-08-10

申请号：BG3140575

申请日：1975-11-04

IPC: C07D201/06

公开(公告)号：FR1419308A

公开(公告)日：1965-11-26

申请号：FR405

申请日：1964-12-30

Applicant: STAMICARBON

IPC: C07D201/06

Abstract: Oximes are prepared by reacting carbonyl compounds with hydroxylammonium sulphate solution, obtained by reducing SO2 with nitritebisulphite solution, which contains such an amount of ammonium sulphate that during the reaction the medium is buffered at pH 1.5-3. The preparation of cyclohexanone oxime is exemplified.