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    SEPARATION OF PRODUCT GAS MIXTURE OF CATALYTIC SYNTHESIS OF METHYLMERCAPTAN
    1.
    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.

    CONTINUOUS PRODUCTION OF METHYLMERCAPTAN
    2.
    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.

    SHAPED PRODUCT OF CYANURIC CHLORIDE AND ITS PRODUCTION
    3.
    发明专利
    SHAPED PRODUCT OF CYANURIC CHLORIDE AND ITS PRODUCTION 失效

    公开(公告)号：JPH10120661A

    公开(公告)日：1998-05-12

    申请号：JP28015397

    申请日：1997-10-14

    Applicant: DEGUSSA

    Inventor： GOEDECKE RALF DR ,  HENTSCHEL KLAUS DR ,  MOELLER ROLF ,  EHRHARDT KNUT ,  SCHMIDT MANFRED DR ,  KISNER MICHAEL DR

    IPC: C07D251/28

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject shaped product having a thickness in a specific range, improved in the defects of conventional particulate cyanuric chloride, reduced in operation troubles and/or in problems on work hygiene, and capable of being easily treated. SOLUTION: This pellet or flake of cyanuric chloride has a thickness of 0.5-3mm. Especially, the pellet has a true diameter of 2-10mm, and the flake has an area of 10-50mm . The objective shaped product is obtained by applying the melted form of the cyanuric chloride to the surface of a substrate in the form of drops or stripes, cooling the surface and/or bringing the applied melted liquid into contact with a cooling gas to remove the melting heat, and subsequently taking up the coagulated shaped product from the surface.

    Method for producing methionine
    4.
    发明专利
    Method for producing methionine 有权
    甲磺酸生产方法

    公开(公告)号：JP2005225882A

    公开(公告)日：2005-08-25

    申请号：JP2005036873

    申请日：2005-02-14

    Applicant: Degussa Ag ,  デグサ アクチエンゲゼルシャフト

    Inventor： BUSS DIETER ,  STOCKFLETH RON ,  KOERFER MARTIN ,  STOCK JUERGEN ,  GOEDECKE RALF DR ,  HASSELBACH HANS JOACHIM DR ,  HORNUNG GUNDOLF

    IPC: C07C319/20 ,  C07C319/28 ,  C07C323/58

    CPC classification number: C07C319/28 ,  C07C319/20 ,  C07C323/58

    Abstract: PROBLEM TO BE SOLVED: To provide a practical and economical method for hydrolyzing methionyl-methionine in a suitable ratio, by avoiding undesirable side reaction and decomposition of an end product. SOLUTION: An improved method for producing methionine comprises rapidly converting the methionyl-methionine which is a by-product into the methionine which is the product through hydrolysis reaction. The method is conducted at a high temperature (200°C to 280°C) in a short residence time (20 sec to 200 sec). The method is suitable for increasing a final yield of the methionine which is the desired end product through processes for producing the methionine. An extremely high space-time yield is realized due to the high temperature, so that the method ensures an economical efficiency. COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：通过避免不期望的副反应和最终产物的分解，以适当的比例提供用于水解甲硫氨酰 - 甲硫氨酸的实用和经济的方法。 解决方案：一种改进的产生甲硫氨酸的方法包括将作为副产物的甲硫氨酰 - 甲硫氨酸迅速转化为通过水解反应产物的甲硫氨酸。 该方法在短时间（20秒至200秒）的高温（200℃至280℃）下进行。 该方法适用于通过生产甲硫氨酸的方法提高作为所需最终产物的甲硫氨酸的最终产率。 由于温度高，实现了极高的空时收益，从而确保了经济效益。 版权所有（C）2005，JPO＆NCIPI

    PRODUCTION OF SODIUM SULFIDE ANHYDRIDE
    5.
    发明专利
    PRODUCTION OF SODIUM SULFIDE ANHYDRIDE 失效

    公开(公告)号：JPH11236204A

    公开(公告)日：1999-08-31

    申请号：JP35468098

    申请日：1998-12-14

    Applicant: DEGUSSA

    Inventor： MAGIERA ROBERT DR ,  ALT CHRISTIAN HANS ,  RASIG GERHARD ,  MUENZENBERG JOERG ,  BATZ-SOHN CHRISTOPH DR ,  GOEDECKE RALF DR ,  DESCHLER ULRICH ,  KNAPP VOLKER ,  RUETZEL KARL-HEINZ

    IPC: C01B17/38

    Abstract: PROBLEM TO BE SOLVED: To prevent undesirable fusing of a dehydrated substance and to obtain an anhydride product by passing sodium sulfate having a specified water content through a device, continuously raising the temp. of the device from the entrance to the exit, and maintaining low pressure. SOLUTION: Sodium sulfide having 35 to 45% water content, especially 38 to 40% is carried by mixing and passing through a device. The temp. of the Na2 S hydrate supplied to the device (product temp.) is continuously increased in such a manner that the temp. is about 20 deg.C at the supply position of the solid and >180 deg.C at the exit of the solid. At the same time, low pressure as =90 min residential time in the drying device.

    7.
    发明专利
    未知

    公开(公告)号：AT509908T

    公开(公告)日：2011-06-15

    申请号：AT04003353

    申请日：2004-02-14

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： BUSS DIETER DR ,  STOCKFLETH RON DR ,  KOERFER MARTIN ,  STOCK JUERGEN DR ,  GOEDECKE RALF DR ,  HASSELBACH HANS-JOACHIM DR ,  HORNUNG GUNDOLF

    IPC: C07C319/20 ,  C07C319/28 ,  C07C323/58

    Abstract: The invention refers to an improved process for producing methionine where the by-product methionyl-methionine is quickly converted to the product methionine by a hydrolysis reaction. The invention is characterized in that the reaction is performed at high temperatures (200 DEG C to 280 DEG C) and short residence times (20 s bis 200 s). The process is suited to increase the final yield of the desired end product methionine during a process for producing methionine. Because of the higher temperatures significantly higher space-time yields can be achieved, whereby the economic efficiency of the process described by this invention can be guaranteed.

    8.
    发明专利
    未知

    公开(公告)号：BR9302030A

    公开(公告)日：1994-03-01

    申请号：BR9302030

    申请日：1993-05-24

    Applicant: DEGUSSA

    Inventor： EICKHOFF HUBERT ,  SCHIRMACHER RUDIGER ,  MANGARTZ KARL-HEINZ DR ,  HUBER HANS-MARTIN DR ,  GOEDECKE RALF DR

    IPC: B01D39/16 ,  B01D39/20 ,  B01D61/14 ,  B01D71/00 ,  B01J8/00 ,  C01B15/013 ,  C01B15/023 ,  B01D71/02 ,  B01D71/26

    Abstract: The invention relates to a process for the separation of catalyst-free working solution from working solution containing palladium black, of the hydrogenation cycle of the anthraquinone process for the preparation of hydrogen peroxide. The object of the invention was to improve the separation of a catalyst-free working solution from the hydrogenation cycle containing palladium black, which separation had previously been carried out using filter cartridges, and thus to reduce the process costs. The object is achieved by employing a microfilter which operates according to the cross-current principle and has a filter membrane made of ceramic material, especially alpha -alumina or polyolefin having a mean pore width in the range from 0.1 to 3.0 mu m; the cross-current velocity is in general from 0.5 to 5 m/sec.

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