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    REDUCTION OF ACETAL OR KETAL CONTENT IN REACTION MIXTURE
    1.
    发明专利
    REDUCTION OF ACETAL OR KETAL CONTENT IN REACTION MIXTURE 失效

    公开(公告)号：JP2000086557A

    公开(公告)日：2000-03-28

    申请号：JP24759899

    申请日：1999-09-01

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS DR ,  JAEGER BERND DR ,  SAUER JOERG DR ,  VANHEERTUM RUDOLF DR

    IPC: B01J23/44 ,  B01J23/46 ,  B01J23/755 ,  C07B61/00 ,  C07C29/132 ,  C07C29/90 ,  C07C31/20

    Abstract: PROBLEM TO BE SOLVED: To reduce the acetal or ketal in an aqueous phase reaction mixture containing a high-content of alcohol by catalytically hydrogenating the acetal or ketal with a heterogenous catalyst that is acidic or neutral at room temperature thereby further reducing the acetal or ketal without decomposition of alcohol. SOLUTION: Acetals other than formal or ketal in an aqueous phase reaction mixture containing at least 10 moles of monohydric or polyhydric alcohol per mole of acetal or ketal are reduced by catalytically hydrogenation in the presence of a catalyst of a noble metal on activated carbon heterogeneously at 80-250 deg.C, preferably 100-180 deg.C, under a hydrogen partial pressure of 0.5-30 MPa. This process is particularly suitable for removal of the acetals other than formal or ketals of α-hydroxycarbonyl compounds or β-hydroxycarbonyl compound, particularly removal of 1,3-dioxolane derivatives, particularly 1,3-dioxane derivatives.

    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 ALCOHOL
    5.
    发明专利
    PRODUCTION OF ALCOHOL 失效

    公开(公告)号：JP2000103751A

    公开(公告)日：2000-04-11

    申请号：JP27325599

    申请日：1999-09-27

    Applicant: DEGUSSA

    Inventor： HAAS THOMAS DR ,  JAEGER BERND DR ,  SAUER JOERG DR ,  VANHEERTUM RUDOLF DR

    IPC: B01J23/46 ,  B01J8/02 ,  C07B61/00 ,  C07C29/141 ,  C07C29/145 ,  C07C31/10 ,  C07C31/20 ,  C07C31/26

    Abstract: PROBLEM TO BE SOLVED: To produce an alcohol in high yield by catalytically hydrogenating a specific aldehyde or a ketone in an aqueous solution or an organic solvent at a specified temperature under a specific hydrogen pressure using a specified ruthenium catalyst. SOLUTION: (B) An aldehyde (except 3-hydroxypropionaldehyde) or a ketone is catalytically hydrogenated in an aqueous solution or an organic solvent at 0-200 deg.C temperature under 0.5-30 MPa H2 pressure while using (A) a ruthenium catalyst having 0.1-20 wt.% of ruthenium content and using the ruthenium on an oxide carrier (preferably TiO2 or SiO2) consisting of the group of TiO2, SiO2, ZrO2, MgO2, mixed oxides and silicic salts except zeolite as a catalyst. Furthermore, acetals and ketals which are by-products can be decomposed by conducting the above hydrogenation in the presence of an acidic catalyst.

    CONTINUOUS PRODUCTION OF METHYLMERCAPTAN
    6.
    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.

    METHOD FOR PRODUCING ISOPHORONEDIAMINE
    8.
    发明专利
    METHOD FOR PRODUCING ISOPHORONEDIAMINE 审中-公开

    公开(公告)号：JP2002226439A

    公开(公告)日：2002-08-14

    申请号：JP2001390387

    申请日：2001-12-21

    Applicant: DEGUSSA

    Inventor： OSTGARD DANIEL ,  BERWEILER MONIKA ,  ROEDER STEFAN ,  SAUER JOERG DR ,  JAEGER BERND DR ,  FINKE NORBERT ,  LETTMANN CHRISTIAN

    IPC: C07B61/00 ,  C07C209/48 ,  C07C209/52 ,  C07C211/36

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing isophoronediamine from isophoronenitrile, comprising hydrogenating in the presence of a Raney catalyst having a small apparent density and a good hydrogenation activity. SOLUTION: This method for producing the isophoronediamine from isophoronenitrile, isophoronenitrileimine and/or their mixture comprises hydrogenating into the isophoronediamine in the presence of at least ammonia, hydrogen, and a hollow type Raney hydrogenation catalyst based on at least cobalt, nickel, copper and/or iron. The production of the isophoronediamine in a high conversion and in an extremely good yield can be achieved using substantially small amounts of the catalyst materials, because the apparent density of the catalyst is small.

    PRODUCTION OF CYANO COMPOUND
    10.
    发明专利
    PRODUCTION OF CYANO COMPOUND 失效

    公开(公告)号：JPH10259177A

    公开(公告)日：1998-09-29

    申请号：JP31172397

    申请日：1997-11-13

    Applicant: DEGUSSA

    Inventor： HIPPEL LUKAS VON DR ,  SAUER JOERG DR ,  SCHUETTE RUEDIGER DR ,  SAUER MANFRED DR ,  ARNTZ DIETRICH

    IPC: C07D213/84 ,  B01J29/26 ,  C01B17/74 ,  C01C3/02 ,  C07B43/08 ,  C07B61/00 ,  C07C253/24 ,  C07C255/01 ,  C07D213/54

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a cyano compound by such an ammoxidation reaction as enabling to use one or more other ammonia sources instead of gaseous ammonia. SOLUTION: This method for producing a cyano compound comprises subjecting a cyano compound of the formula: R-CN (R is H or an organic group) as an ammoxidizable organic compound to an ammoxidation reaction with an ammonium salt as an ammonia source and with an oxygen source in the presence of an ammoxidation catalyst at a temperature of 100-700 deg.C. The employment of the solution of the ammonium salt enables improved fine dispersion, in its turn, improved contact, and gives the cyano compound of ammoxidation product in an enhanced yield.

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