中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

24 records (took 0.019 seconds)

    CONTINUOUS PRODUCTION OF METHYLMERCAPTAN
    1.
    发明专利
    CONTINUOUS PRODUCTION OF METHYLMERCAPTAN 失效

    公开(公告)号：JPH10195040A

    公开(公告)日：1998-07-28

    申请号：JP35662197

    申请日：1997-12-25

    Applicant: DEGUSSA

    Inventor： HOFEN WILLI ,  BOECK WOLFGANG DR ,  RAUTENBERG STEPHAN DR ,  SAUER JOERG DR ,  ARNTZ DIETRICH DR ,  GOEDECKE RALF DR ,  TAUGNER WOLFGANG ,  SONNENSCHEIN RAYMUND DR

    IPC: B01J21/04 ,  B01J23/30 ,  C07B61/00 ,  C07C319/08 ,  C07C321/04

    Abstract: PROBLEM TO BE SOLVED: To provide a continuous method for producing methylmercaptan useful as a synthetic intermediate for methionine, etc., capable of reducing operation energy cost by treating specific starting substance mixture under specify conditions. SOLUTION: Hydrogen sulfide-newly produced gas 20 is compressed until an intermediate pressure under addition of liquid methanol and circulated hydrogen sulfide gas is mixed with the newly produced gas and the mixture is compressed to operation pressure and further, methanol is fed to compressed gas mixture in the form of methanol vapor 24 to produce a starting substance mixture 25 having 1.1-3 molar ratio of hydrogen sulfide to methanol and the starting substance gas mixture is heated to 150-200 deg.C preheating temperature and further, the starting substance gas mixture 25 is thermally exchanged with reaction heat generated in a catalyst bed to heat the gas mixture to reaction temperature and methanol and hydrogen sulfide are reacted with the gas mixture in contact with a catalyst bed to provide methylmercaptan. It is preferable to inject excess liquid methanol and circulate unvaporized content.

    SEPARATION OF PRODUCT GAS MIXTURE OF CATALYTIC SYNTHESIS OF METHYLMERCAPTAN
    3.
    发明专利
    SEPARATION OF PRODUCT GAS MIXTURE OF CATALYTIC SYNTHESIS OF METHYLMERCAPTAN 失效

    公开(公告)号：JPH10195041A

    公开(公告)日：1998-07-28

    申请号：JP35662297

    申请日：1997-12-25

    Applicant: DEGUSSA

    Inventor： HOFEN WILLI ,  BOECK WOLFGANG DR ,  RAUTENBERG STEPHAN DR ,  SAUER JOERG DR ,  ARNTZ DIETRICH DR ,  GOEDECKE RALF DR ,  TAUGNER WOLFGANG ,  SONNENSCHEIN RAYMUND DR

    IPC: C07C319/02 ,  C07C319/28 ,  C07C321/04

    Abstract: PROBLEM TO BE SOLVED: To separate methylmercaptan, etc., in high purity and obtain a synthetic intermediate for methionine, etc., by treating a specific product gas mixture under specific conditions. SOLUTION: (i) A product gas stream is separated into an aqueous condensate 33 containing methanol and water, an organic condensate 34 containing hydrogen sulfide, methylmercaptan and dimethylsulfide and a residual gas stream 35 containing hydrogen sulfide and methylmercaptan by particle dondensation at two stages and (ii) methylmercaptan and dimethysulfide are absorbed from the residual gas stream 35 by first cleaning and (iii) hydrogen sulfide is absorbed from a released gas stream 36 by a second cleaning using methanol and (iv) hydrogen sulfide is separated from residual component of product gas mixture 27 produced in distillate fraction as a crude product of gas and (v) the crude product is distilled to separate the crude product into methylmercaptan, dimethylsulfide, dimethyl ether, polysulfide, methanol and water component.

    CATALYST AND SYNTHETIC METHOD OF ALKYL MERCAPTAN AND PRODUCTION OF THIS CATALYST
    4.
    发明专利
    CATALYST AND SYNTHETIC METHOD OF ALKYL MERCAPTAN AND PRODUCTION OF THIS CATALYST 失效

    公开(公告)号：JPH1099683A

    公开(公告)日：1998-04-21

    申请号：JP25840097

    申请日：1997-09-24

    Applicant: DEGUSSA

    Inventor： SAUER JOERG DR ,  VON HIPPEL LUKAS DR ,  ARNTZ DIETRICH DR ,  BOECK WOLFGANG DR

    IPC: B01J23/04 ,  B01J23/30 ,  B01J37/02 ,  C07B61/00 ,  C07C319/00 ,  C07C319/08 ,  C07C321/04

    Abstract: PROBLEM TO BE SOLVED: To produce a catalyst consisting of aluminum oxide which contains alkyl metal tungstate for a promotor on activated aluminum oxide and is used for synthesis of methyl mercaptan. SOLUTION: The catalyst is produced by firstly covering aluminum oxide by impregnation in an excess amount of an aqueous impregnation solution in a first part of a promotor and thereafter drying aluminum oxide at the raised temperature and then using impregnation into pore volume to apply a second part of the promotor on aluminum oxide and thereby depositing the promotor on activated aluminum oxide at two times and newly drying the catalyst precursor obtained by such a method as this at the raised temperature and thereafter finally calcining it at 200-600 deg.C. Thereby, activity and selectivity are improved in comparison with the already-known catalyst in the case of small molar ratio of hydrogen sulfide to methanol.

    PRODUCTION OF NICOTINIC ACID
    5.
    发明专利
    PRODUCTION OF NICOTINIC ACID 失效

    公开(公告)号：JP2000086634A

    公开(公告)日：2000-03-28

    申请号：JP24351899

    申请日：1999-08-30

    Applicant: DEGUSSA

    Inventor： HEINZ DIETER ,  HOELDERICH WOLFGANG ,  KRILL STEFFEN ,  BOECK WOLFGANG DR ,  HUTHMACHER KLAUS DR

    IPC: C07D213/79 ,  C07D213/80 ,  C07D213/803 ,  C07D213/807

    Abstract: PROBLEM TO BE SOLVED: To provide an improved method for producing nicotinic acid, capable of profitably producing the nicotinic acid in a high yield by the direct oxidation of β-picoline by separately feeding the β-picoline and water into a reactor. SOLUTION: This method for producing nicotinic acid comprises separately feeding β-picoline and water into a reactor filled with a TiO2 support catalyst containing vanadium. This heterogeneous catalyst preferably contains anatase having a specific surface area of >100 m2/g as the support. The anatase support is preferably produced by a sulfate salt method. The titanium dioxide support preferably contains a sulfate salt in an amount of >0.1%. The catalyst preferably has a vanadium dioxide content of 5-50%. The reaction temperature is preferably 150-450 deg.C. The ratio of the acid/starting substance is preferably 5/1 to 40/1. The ratio of the water/starting substance is preferably 15/1 to 100/1. WHSV is preferably 0.02 to 5 h-1.

    8.
    发明专利
    未知

    公开(公告)号：DE59008886D1

    公开(公告)日：1995-05-18

    申请号：DE59008886

    申请日：1990-09-11

    Applicant: DEGUSSA

    Inventor： BOECK WOLFGANG DR ,  ARNTZ DIETRICH DR ,  PRESCHER GUENTER DR ,  BURKHARDT WERNER

    IPC: B01J23/88 ,  B01J23/883 ,  B01J27/192 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C45/28 ,  C07C45/34 ,  C07C45/35 ,  C07C47/22

    Abstract: The invention relates to a process for producing acrolein by catalytic gas-phase oxidation of propene with air in the presence of steam and inert gas or waste gas from the reaction, the feed stocks being passed in defined quantitative ratios at 300 - 380 DEG C and 1.4 - 2.2 bar over a catalyst containing the MoFeCoNiBiP(As)K(Rb,Cs)SmSiO element combination in the form of a bed of individual particles, the catalyst particles meeting defined geometrical conditions and a number of essential physical-chemical parameters, and a specific loading of 2 - 8 mol of propene/dm of catalyst bed/hour being set.

    9.
    发明专利
    未知

    公开(公告)号：DE3930534A1

    公开(公告)日：1991-03-21

    申请号：DE3930534

    申请日：1989-09-13

    Applicant: DEGUSSA

    Inventor： BOECK WOLFGANG DR ,  ARNTZ DIETRICH DR ,  PRESCHER GUENTER DR ,  BURKHARDT WERNER

    IPC: B01J23/88 ,  B01J23/883 ,  B01J27/192 ,  B01J35/02 ,  B01J35/10 ,  C07B61/00 ,  C07C45/28 ,  C07C45/34 ,  C07C45/35 ,  C07C47/22

    Abstract: The invention relates to a process for producing acrolein by catalytic gas-phase oxidation of propene with air in the presence of steam and inert gas or waste gas from the reaction, the feed stocks being passed in defined quantitative ratios at 300 - 380 DEG C and 1.4 - 2.2 bar over a catalyst containing the MoFeCoNiBiP(As)K(Rb,Cs)SmSiO element combination in the form of a bed of individual particles, the catalyst particles meeting defined geometrical conditions and a number of essential physical-chemical parameters, and a specific loading of 2 - 8 mol of propene/dm of catalyst bed/hour being set.

    10.
    发明专利
    未知

    公开(公告)号：DE19639520C2

    公开(公告)日：1998-10-01

    申请号：DE19639520

    申请日：1996-09-26

    Applicant: DEGUSSA

    Inventor： SAUER JOERG DR ,  HIPPEL LUKAS VON DR ,  ARNTZ DIETRICH DR ,  BOECK WOLFGANG DR

    IPC: B01J23/04 ,  B01J23/30 ,  B01J37/02 ,  C07B61/00 ,  C07C319/00 ,  C07C319/08 ,  C07C321/04

    Abstract: In an aluminium oxide (I) catalyst for the synthesis of methyl mercaptan containing 5-25 wt.% potassium tungstate (II) as promoter with respect to active (I), (II) is deposited in 2 portions. (I) is first coated with the first portion of (II) by impregnation in excess aqueous solution, then dried at elevated temperature. Then the second portion is applied by pore volume impregnation. The catalyst precursor is then dried at elevated temperature and calcined at 200-600 degrees C.

Patent Agency Ranking