CATALYST COMPOSITIONS OF SCHEELITE CRYSTAL STRUCTURE CONTAINING VANADIUM,BISMUTH AND CATION VACANCIES

• US 3,843,554 A
• Filed: 10/04/1971
• Issued: 10/22/1974
• Est. Priority Date: 09/24/1970
• Status: Expired due to Term

• Current Assignee: Arthur W. Sleight, Aykan Kamran, Donald B. Rogers
• Original Assignee: Arthur W. Sleight, Aykan Kamran, Donald B. Rogers
• Inventors: AYKAN KAMRAN, Rogers, Donald B., Sleight, Arthur W.
• Application Number:
  US05/186,407
• Time in Patent Office: 1,114 Days
• US Class Current: 502/308
• CPC Class Codes: B01J 23/22 Vanadium
• CPC Class Codes: B01J 23/31 combined with bismuth
• CPC Class Codes: B01J 23/36 Rhenium
• CPC Class Codes: C07C 253/26 containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
• CPC Class Codes: C07C 255/08 Acrylonitrile; Methacrylonitrile
• CPC Class Codes: C07C 45/34 in unsaturated compounds
• CPC Class Codes: C07C 45/35 in propene or isobutene
• CPC Class Codes: C07C 47/22 Acryaldehyde; Methacryaldehyde
• CPC Class Codes: Y02P 20/52 using catalysts, e.g. selective catalysts
• CPC Class Codes: Y10S 502/502 Cystallinity
• CPC Class Codes: Y10S 585/906 Catalyst preservation or manufacture, e.g. activation before use

Abstract

1. A CATALYST WHICH HAS SCHEELITE-TYPE CRYSTAL STRUCTURE OF THE FORMULA A1-Z&Z BO4 WHEREIN A REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.9 TO ABOUT 1.6 *A, SOME OF WHICH ARE TRIVALENT BISMUTH, AND AT LEAST ONE OTHER IS SELECTED FROM THE GROUP CONSISTING OF LEAD, CALCIUM, STRONTIUM, BARIUM, ZIRCONIUM AND HAFNIUM; B REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.3 TO ABOUT 0.5* A COMPRISING VANADIUM OR VANADIUM AND MOLYBDENUM; $ REPRESENTS A CATION VACANCY IN THE CRYSTAL STRUCTURE; AND Z IS A POSITIVE NUMBER IN THE RANGE OF AOUT 0.001 TO ABOUT 0.15.

Claims

1. A CATALYST WHICH HAS SCHEELITE-TYPE CRYSTAL STRUCTURE OF THE FORMULA A1-Z&

Z BO4 WHEREIN A REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.9 TO ABOUT 1.6 *A, SOME OF WHICH ARE TRIVALENT BISMUTH, AND AT LEAST ONE OTHER IS SELECTED FROM THE GROUP CONSISTING OF LEAD, CALCIUM, STRONTIUM, BARIUM, ZIRCONIUM AND HAFNIUM;

B REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.3 TO ABOUT 0.5* A COMPRISING VANADIUM OR VANADIUM AND MOLYBDENUM;

$ REPRESENTS A CATION VACANCY IN THE CRYSTAL STRUCTURE;

AND Z IS A POSITIVE NUMBER IN THE RANGE OF AOUT 0.001 TO ABOUT 0.15.