1.
    发明专利
    未知

    公开(公告)号:BR0113040A

    公开(公告)日:2003-07-08

    申请号:BR0113040

    申请日:2001-05-15

    Abstract: The invention is a method for the reduction of ammonia breakthrough during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propane and isobutane; ammonia and an oxygen-containing gas into a lower portion of a fluid-bed reactor containing an ammoxidation catalyst to react in the presence of said catalyst to produce acrylonitrile. The method comprises introducing into the reactor at least one C2 to C5 olefin which will react with at least a portion of the unreacted ammonia and oxygen present in the reactor to substantially reduce the amount of ammonia present in the reactor effluent exiting the reactor.

    ARSENIC PROMOTED VANADIUM-ANTIMONY-OXIDE BASED CATALYST FOR SELECTIVE PARAFFIN AMMOXIDATION

    公开(公告)号:CA2361688A1

    公开(公告)日:2000-08-10

    申请号:CA2361688

    申请日:2000-01-18

    Abstract: A process of manufacturing acrylonitrile or methacrylonitrile by the catalyt ic reaction in the vapor phase of a paraffin selected from propane and isobutan e with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of t he paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said cataly st has the elements in the proportions indicated by the empirical formula: VSbmAaDbQqRrOx where A is one or more of Ti, Sn, Fe, Cr and Ga; D is one or more of Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Zr, Cu, Ta, Bi, Ce, In, B and Mn ; Q is one or more of Mo, W, and Nb; R is one or more of As, Te, and Se; m equals 0.8 to 4; a equals 0.01 to 2; d is 0 to 2; 0

    PARAFFIN AMMOXIDATION USING VANADIUM ANTIMONY OXIDE BASED CATALYSTS WITH HALIDE PROMOTERS

    公开(公告)号:MY132231A

    公开(公告)日:2007-09-28

    申请号:MYPI9602154

    申请日:1996-06-03

    Abstract: THE PROCESS FOR THE AMMOXIDATION OF A C3 TO C5 PARAFFINIC HYDROCARBON TO ITS CORRESPONDING (ALPHA),ß-UNSATURATED HYDROCARBON COMPRISNG REACTING THE C3 TO C5 PARAFFINIC HYDROCARBON WITH AMMONIA AND OXYGEN IS A FLUID BED REACTOR AT A TEMPERATURE OF BETWEEN 250°C TO 600°C IN THE PRESENCE OF A CATALYST HAVING THE EMPIRICAL FORMULA AS FOLLOWS:VVSBMAADDOXWHEREIN A WHEN PRESENT IS SN AND/OR TID WHEN PRESENT IS ONE OR MORE OF LI, MG, NA, CA, SR, BA, CO,FE, CR, GA, NI, ZN, GE, NB, ZR, MO, W, CU, TE, TA, SE, BI, CE, IN, AS, B, AI, P AND MN; AND WHEREIN V IS 1, M IS 0.5-75, A IS 0 TO 25, D IS 0 TO 25, AND X IS DETERMINED BY THE OXIDATION STATE OF THE CATIONS PRESENT,AND A MINOR QUANTITY OF AN HALOGEN-CONTAINING COMPONENT, PREFERABLY CHARACTERIZED BY THE FOLLOWING FORMULA:R-X OR X2WHERE R=HYDROGEN, C1-C20 ALKYLAND X=F, C1, BR, I OR MIXTURES THEREOF.

    Paraffin ammoxidation using vanadium antimony oxide based catalysts with halide prometers

    公开(公告)号:ZA964551B

    公开(公告)日:1996-12-12

    申请号:ZA964551

    申请日:1996-06-03

    Abstract: The process for the ammoxidation of a C3 to C5 paraffinic hydrocarbon to its corresponding alpha , beta -unsaturated hydrocarbon comprising reacting the C3 to C5 paraffinic hydrocarbon with ammonia and oxygen in a fluid bed reactor at a temperature of between 250 DEG C to 600 DEG C in the presence of a catalyst having the empirical formula as follows: VvSbmAaDdOx wherein A when present is Sn and/or Ti D when present is one or more of Li, Mg, Na, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al, P and Mn; and wherein v is 1, m is 0.5-75, a is 0 to 25, d is 0 to 25, and x is determined by the oxidation state of the cations present, and a minor quantity of an halogen-containing component, preferably characterized by the following formula: R-X or X2 where R=Hydrogen, C1-C20 alkyl and X=F, Cl, Br, I or mixtures thereof.arbo

    Amelioration of ammonia breakthrough in an alkane ammoxidation process.

    公开(公告)号:ZA200300650B

    公开(公告)日:2003-11-04

    申请号:ZA200300650

    申请日:2003-01-23

    Abstract: The invention is a method for the reduction of ammonia breakthrough during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propane and isobutane; ammonia and an oxygen-containing gas into a lower portion of a fluid-bed reactor containing an ammoxidation catalyst to react in the presence of said catalyst to produce acrylonitrile. The method comprises introducing into the reactor at least one C2 to C5 olefin which will react with at least a portion of the unreacted ammonia and oxygen present in the reactor to substantially reduce the amount of ammonia present in the reactor effluent exiting the reactor.

    8.
    发明专利
    未知

    公开(公告)号:AT251122T

    公开(公告)日:2003-10-15

    申请号:AT00903329

    申请日:2000-01-18

    Abstract: A process of manufacturing acrylonitrile or methacrylonitrile by the catalytic reaction in the vapor phase of a paraffin selected from propane and isobutane with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of the paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said catalyst has the elements in the proportions indicated by the empirical formula: VSbmAaDbQqRrOx where A is one or more of Ti, Sn, Fe, Cr and Ga; D is one or more of Li, Mg, Ca, Sr, Ba, Co, Ni, Zn, Ge, Zr, Cu, Ta, Bi, Ce, In, B and Mn; Q is one or more of Mo, W, and Nb; R is one or more of As, Te, and Se; m equals 0.8 to 4; a equals 0.01 to 2; d is 0 to 2; 0

    10.
    发明专利
    未知

    公开(公告)号:ES2191813T3

    公开(公告)日:2003-09-16

    申请号:ES97305415

    申请日:1997-07-18

    Abstract: A method of making a catalyst having the following empirical formula: VSbmAaDdOx where A = Sn, Ti or mixtures thereof, D = at least one element selected from Li, Mg, Na, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Mo, W, Cu, Ti, Ta, Se, Bi, Ce, In, As, B, Al, and Mn, and wherein m = 0.5 to 10 a = 0 to 10 d = 0 to 10 x = number of oxygen atoms necessary to satisfy the valency requirements of the other elements, comprising reacting a monoperoxovanadium ion, VO(O2) , while in aqueous solution with a first portion of an Sb compound which contains Sb, having a valence of 3 , thereby reducing the average valence of the V to less than 5 and oxidizing Sb to a valence state of 5 , removing the water from the solution to form a dried catalyst precursor, and calcining the resulting dried precursor at a temperature in the range of 650 DEG to 950 DEG C to form the catalyst, wherein the improvement comprises adding at least a second portion of an Sb compound after the first portion of Sb compound has been added and has at least partially reacted with the monoperoxovanadium ion.

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