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    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
    2.
    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.

    METHOD FOR REMOVING ACROLEIN FROM THE PROCESS GAS OF A HETEROGENEOUSLY CATALYSED OXIDATION OF PROPENE
    5.
    发明专利
    METHOD FOR REMOVING ACROLEIN FROM THE PROCESS GAS OF A HETEROGENEOUSLY CATALYSED OXIDATION OF PROPENE 未知

    公开(公告)号：SG11201506145UA

    公开(公告)日：2015-09-29

    申请号：SG11201506145U

    申请日：2014-01-28

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： BÖCK WOLFGANG ,  TAUGNER WOLFGANG ,  GRUBER UDO

    IPC: C07C45/35 ,  C07C45/78 ,  C07C45/82 ,  C07C47/22

    Abstract: Producing acrolein comprises: (a) performing gas-phase oxidation of propene with air over a heterogeneous catalyst in the presence of a diluent gas; (b) quenching the acrolein-containing gas stream consisting of marsh, middle and headboard for the separation of by-products in the presence of water and an organic phase containing hardly water-soluble organic solvent; (c) absorbing the acrolein-containing gas stream in the presence of water and organic solvent; and (d) distillative separation of the acrolein from the organic phase containing aqueous acrolein solution. Producing acrolein comprises: (a) a performing gas-phase oxidation of propene with air over a heterogeneous catalyst in the presence of a diluent gas; (b) collecting the acrolein-containing gas stream obtained in step (a) consisting of marsh, middle and headboard and then quenching for the separation of by-products in the presence of water and an organic phase containing hardly water-soluble organic solvent; (c) collecting the acrolein-containing gas stream obtained in step (b) and then absorbing in the presence of water and the organic phase containing hardly water-soluble organic solvent to obtain an organic phase containing aqueous acrolein solution and a non-condensable gas stream and at least partially recycling the non-condensable gas stream as a diluent gas in step (a); and (d) distillative separation of the acrolein from the organic phase containing aqueous acrolein solution. The remaining amount of acrolein is discharged from the organic phase containing aqueous acrolein solution in step (e) so that an organic phase II is formed and is separated by phase separation II. The organic phase II is entered into a bottom part of the quenching step from which the organic phase II is separated by distillation and/or stripping with an aqueous component via a head portion so that an organic phase I is formed. The organic phase I is separated by phase separation I and is entered in a bottom part of the absorption step.

    9.
    发明专利
    未知

    公开(公告)号：DE59703011D1

    公开(公告)日：2001-03-29

    申请号：DE59703011

    申请日：1997-12-09

    Applicant: DEGUSSA

    Inventor： HOFEN WILLI ,  BOECK DR ,  RAUTENBERG DR ,  SAUER DR ,  ARNTZ DR ,  GOEDECKE DR ,  TAUGNER WOLFGANG ,  SONNENSCHEIN DR

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

    Abstract: A process for the continuous production of methyl-mercaptan (I) comprises (i) reacting a mixture of methanol and hydrogen sulphide (H2S) in the vapour phase at 300-500 degrees C and 5-15 bar on an alumina-based catalyst bed and (ii) separating (I) from the gas mixture obtained by absorption and distillation, with recycling of unreacted methanol and H2S, removal of inert gas and waste water, and replacement of used methanol and H2S. The starting gas mixture is obtained by (a) compressing fresh H2S to an intermediate pressure (P1) with addition of liquid methanol, (b) adding the recycled H2S and compressing the mixture to operating pressure (P2), (c) adding more methanol in the form of vapour to give a compressed mixture with a mol ratio of (H2S):(methanol) = 1.1-3, (d) preheating the gas mixture to 150-200 degrees C, (e) heating to reaction temperature using the heat of reaction released on the catalyst and (f) reaction on the catalyst bed.

    10.
    发明专利
    未知

    公开(公告)号：BR9706465A

    公开(公告)日：1999-06-01

    申请号：BR9706465

    申请日：1997-12-26

    Applicant: DEGUSSA

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

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

    Abstract: A process for the continuous production of methyl-mercaptan (I) comprises (i) reacting a mixture of methanol and hydrogen sulphide (H2S) in the vapour phase at 300-500 degrees C and 5-15 bar on an alumina-based catalyst bed and (ii) separating (I) from the gas mixture obtained by absorption and distillation, with recycling of unreacted methanol and H2S, removal of inert gas and waste water, and replacement of used methanol and H2S. The starting gas mixture is obtained by (a) compressing fresh H2S to an intermediate pressure (P1) with addition of liquid methanol, (b) adding the recycled H2S and compressing the mixture to operating pressure (P2), (c) adding more methanol in the form of vapour to give a compressed mixture with a mol ratio of (H2S):(methanol) = 1.1-3, (d) preheating the gas mixture to 150-200 degrees C, (e) heating to reaction temperature using the heat of reaction released on the catalyst and (f) reaction on the catalyst bed.

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