中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

46 records (took 0.023 seconds)

    Heat treated bismuth molybdate and phosphomolybdate-on-titania catalysts
    1.
    发明授权
    Heat treated bismuth molybdate and phosphomolybdate-on-titania catalysts 失效
    热处理双螺杆菌多糖和磷酸双酚A催化剂

    公开(公告)号：US3640900A

    公开(公告)日：1972-02-08

    申请号：US3640900D

    申请日：1969-03-06

    Applicant: DU PONT

    Inventor： MCCLELLAN WILLIAM ,  STILES ALVIN B

    IPC: B01J23/31 ,  B01J27/192 ,  C07C45/38 ,  B01J11/82

    CPC classification number: B01J27/192 ,  B01J23/31 ,  C07C45/38 ,  C07C47/04

    Abstract: A BISMUTH MOLYBDATE- OR BISMUTH PHOSPHOMOLYBDATEON-TITANIA CATALYST IS MADE BY MIXING A TITANIA SOL WITH COMPOUNDS TO GIVE AN AQUEOUS SLURRY WHICH PRODUCES, AFTER DRYING AND CALCINING, BISMUTH OXIDE, MOLYBDENUM OXIDE AND OPTIONALLY SILICON OXIDE AND PHOSPHORUS OXIDE, IN THE DESIRED PROPORTIONS. A PREFERRED METHOD OF PREPARING THE CATALYST IS TO ADD, PRIOR TO DRYING, AMMONIUM CARBONATE, OR AQUEOUS AMMONIA, TO THE SLURRY UNTIL THE PH IS IN THE RANGE OF 5-7.5. SUBSEQUENTLY THE CATALYST IS DRIED AND CALCINED AT TEMPERATURES ABOVE 600* BUT BELOW 700*C. THE RESULTING CATALYST HAS THE FORMULA:

    BIAPBMO12(TI1-XSIX)COD

    WHERE A IS EQUAL TO OR GREATER THAN 4, B IS 0 TO 2, C IS 6 TO 80, D IS 1.5A+2.5B+36+2C AND X IS 0 TO 0.5. THE CATALYST PRODUCED IS USEFUL IN VARIOUS OXIDATION REACTIONS, E.G. METHANOL TO FORMALDEHYDE.

    Conversion of methanol to formaldehyde using a bismuth molybdate on silica catalyst
    7.
    发明授权
    Conversion of methanol to formaldehyde using a bismuth molybdate on silica catalyst 失效
    使用二氧化硅催化剂上的双酚钾转化甲醛向甲醛

    公开(公告)号：US3678139A

    公开(公告)日：1972-07-18

    申请号：US3678139D

    申请日：1969-11-24

    Applicant: DU PONT

    Inventor： MCCLELLAN WILLIAM R ,  STILES ALVIN B

    IPC: C07C45/34 ,  C07C45/35 ,  C07C45/38 ,  C07C45/16

    CPC classification number: C07C45/35 ,  C07C45/34 ,  C07C45/38 ,  C07C47/22 ,  C07C47/04

    Abstract: A two-step process for the vapor phase conversion of methanol with oxygen to formaldehyde uses a conventional silver catalyst in the first step and an improved bismuth molybdate on silica catalyst in the second at temperatures between 450* and 600* C. The improved catalyst is made by mixing compounds to produce bismuth oxide, molybdenum oxide and, optionally, phosphorus oxide, in an aqueous slurry in the desired proportions, adding the slurry to an aqueous silica sol and then adding to the slurry ammonium carbonate or ammonium bicarbonate until the pH is in the range of 5 to 7.5, subsequently drying and calcining at 400* to 550* C. to produce the desired catalyst.

    Abstract translation: 将甲醇与氧气转化为甲醛的两步法在第一步中使用常规的银催化剂，并在二氧化硅催化剂中在二氧化硅催化剂中在450℃和600℃之间使用改进的钼酸铋。改进的催化剂是 通过将化合物混合以在所需比例的水性浆料中制备氧化铋，氧化钼和任选的氧化磷，将浆料加入到水性二氧化硅溶胶中，然后向浆料中加入碳酸铵或碳酸氢铵直至pH为 在5至7.5的范围内，随后在400℃至550℃下干燥和煅烧以产生所需的催化剂。

Patent Agency Ranking