Arsenic promoted vanadium-antimony-oxide based catalyst for selective paraffin ammoxidation.

    公开(公告)号:ZA200106072B

    公开(公告)日:2002-10-24

    申请号:ZA200106072

    申请日:2001-07-24

    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

    AMELIORATION OF AMMONIA BREAKTHROUGH IN AN ALKANE AMMOXIDATION PROCESS

    公开(公告)号:CA2416712A1

    公开(公告)日:2002-02-14

    申请号:CA2416712

    申请日:2001-05-15

    Abstract: The invention is a method for the reduction of ammonia breakthrough during t he 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 on e 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.

    14.
    发明专利
    未知

    公开(公告)号:BR0008070A

    公开(公告)日:2002-02-05

    申请号:BR0008070

    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

    AMELIORATION OF AMMONIA BREAKTHROUGH IN AN ALKANE AMMOXIDATION PROCESS

    公开(公告)号:CA2416712C

    公开(公告)日:2009-12-01

    申请号:CA2416712

    申请日:2001-05-15

    Abstract: The invention is a method for the reduction of ammonia breakthrough during t he 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 on e 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.

    METHOD FOR PREPARING IMPROVED VANADIUM ANTIMONY OXIDE BASED OXIDATION AND AMMOXIDATION CATALYSTS

    公开(公告)号:MY119391A

    公开(公告)日:2005-05-31

    申请号:MYPI9703372

    申请日:1997-07-24

    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° TO 950°C TO FORM THE CATALYST, WHEREIN THE MPROVEMENT 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.

    17.
    发明专利
    未知

    公开(公告)号:ES2208271T3

    公开(公告)日:2004-06-16

    申请号:ES00903329

    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

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