Nova Patents
CA2837201C

Catalysts for petrochemical catalysis

Abstract

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogenous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed.

CA2837201C, drawing sheet 1
Sheet 1 of 37

Term

5.7 yearsleft in the term

Expires 24 May 2032.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Expires

31 claims: 15 independent, 16 dependent

  1. 1
    CLAIMS 1. A catalyst comprising an oxide of a rare earth element, the catalyst comprising:the formula Ln1 4 . x Ln2 x O 6 , wherein Ln1 and Ln2 are each independently a different lanthanide element, and x is a number ranging from greater than 0 to less than 4;and at least one doping element from groups 1-16, lanthanides and actinides, wherein the catalyst comprises a C 2 selectivity of greater than 50% and a methane conversion of greater than 20% when the catalyst is employed as a heterogenous catalyst in the oxidative coupling of methane at a temperature of 750°C or less.
  2. 6
    The catalyst of any one of claims 1 to 5, wherein the catalyst comprises a combination of at least two different doping elements.
  3. 13
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is lanthanum. 173 CA 2837201 2017-06-07
  4. 14
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is neodymium.
  5. 15
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is ytterbium.
  6. 16
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is europium.
  7. 17
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is samarium.
  8. 18
    The catalyst of any one of claims 1 to 12, wherein Ln1 or Ln2 is cerium.
  9. 19
    The catalyst of any one of claims 1 to 12, wherein Ln 1 or Ln2 is praseodymium.
  10. 20
    The catalyst of any one of claims 1 to 19, wherein the oxidative coupling of methane is performed at total reaction pressures ranging from 1 atm to 10 atm.
  11. 21
    The catalyst of any one of claims 1 to 20, wherein the C 2 selectivity is greater than 60% when the catalyst is employed as a heterogenous catalyst in the oxidative coupling of methane at a temperature of 750°C or less.
  12. 22
    The catalyst of any one of claims 1 to 20, wherein the C 2 yield is greater than 10% when the catalyst is employed as a heterogenous catalyst in the oxidative coupling of methane at a temperature of 750°C or less.
  13. 23
    The catalyst of any one of claims 1 to 22, wherein the oxidative coupling of methane is performed at a temperature of 700°C or less. 174 CA 2837201 2017-06-07
  14. 24
    The catalyst of any one of claims 1 to 23 in combination with a support material.
  15. 26
    A method for the preparation of ethane, ethylene or combinations thereof, the method comprising contacting a catalyst of any one of claims 1 to 25 with a gas comprising methane.