中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.018 seconds)

    2.
    发明专利
    未知

    公开(公告)号：DE3868731D1

    公开(公告)日：1992-04-09

    申请号：DE3868731

    申请日：1988-05-25

    Applicant: DEGUSSA

    Inventor： WITZEL MICHAEL DR ,  KLEINSCHMIT PETER DR ,  PFEIFER WOLF-DIETER DR ,  VOIGT CARL DR ,  ALBERS PETER DR

    IPC: B01J23/40 ,  C01C3/02

    Abstract: Prodn. of HCN under the conditions of the 'HCN-CH4-NH3' process, involves reacting 1-4 C aliphatic hydrocarbons (I) with NH3 in the presence of a catalyst (II). The novel features are that : (a) reaction is carried out initially with a catalyst precursor (IIA), consisting of alumina mouldings with Al ions and very small amts. of noble metal, pref. Pt ions applied to the surface from soln.; (b) (IIA) is dried and reduced with H2 before use; (c) (IIA) is placed in the HCN reactor, which is heated to 1000-1350 deg.C and charged with the usual mixt. of NH3 and (I) for this reaction, which is initiated by (IIA); and (d) after a short time, reaction is continued with the Al nitride film formed in situ on the surface of (IIA). Pref. (I) is CH4. (II) is a pref. tubular moulding prepd. from alpha-alumina by impregnation with H2PtCl6 soln. (pref. contg. 0.5-5 wt.% Pt ions) and an AlCl3, Al(NO3)3 or Al2(SO4)3 soln., pref. using a noble metal (Pt):Al molar ratio of 0.001-0.1:1, esp. 0.01-0.1:1.

    3.
    发明专利
    未知

    公开(公告)号：DE2254701A1

    公开(公告)日：1974-05-16

    申请号：DE2254701

    申请日：1972-11-09

    Applicant: DEGUSSA

    Inventor： ASINGER FRIEDRICH PROF DR ING ,  PFEIFER WOLF-DIETER DR ,  OFFERMANNS HERIBERT DR ,  SCHERBERICH PAUL DR ,  SCHREYER GERD DR

    IPC: C07D277/10 ,  C07D277/60 ,  C07D91/24

    Abstract: 2 AND 5 SUBSTITUTED THIAZOLINE-(3) COMPOUNDS OF THE FORMULA: HC=N R1¦¦R3 ANGLE CC ANGLE (I) ANGLE R2SR4 in which R1, R2, and R3 and R4 are the same or different, R1 and R2 are straight or branched chain lower alkyl, alkenyl or aralkyl groups or together are a straight or branched chain alkylene or ethylenically unsaturated divalent aliphatic hydrocarbon group which joins with the adjacent carbon atom to form a ring and R3 and R4 are similarly defined except R3 can also be hydrogen by reaching a 2,2' dioxodisulfide of the formula OO C ANGLE C ANGLE H R1¦H¦R1 ANGLE C---S-S---C ANGLE (II) R2R2 with an oxo compound of the formula R3 ANGLE C=O R4 and with ammonia and hydrogen sulfide in the presence of an amine and an ammonium salt.

Patent Agency Ranking