TREA

Cracking 1-ethers over unmodified gamma-alumina

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Information

  • Patent Application
  • 20070203381
  • Publication Number
    20070203381
  • Date Filed
    February 21, 2007
    17 years ago
  • Date Published
    August 30, 2007
    17 years ago
Information
Abstract
1-Ethers may be cracked over untreated γ-alumina having a pore volume of more than 1.0 cc/g and an average pore diameter of more than 150 angstroms (Å) at a temperature from 250 to 350° C. and a pressure from 10 to 200 kPa at high conversions and good selectivity to produce the corresponding 1-alkene. The process is particularly useful to produce 1-octene from 1-methoxyoctane.
Description
Claims
  • 1. A process comprising passing a feed stream comprising not less than 90 weight % of a C1-4 ether of a C6-10 alkane, in the absence of a sweep gas over γ alumina having a pore volume of not less than 1.0 cc/g and an average pore diameter of more than 150 Å, which alumina has not been modified with a base at a WHSV from 8 to 20 hr−1, a temperature from 250° C. to 350° C., a pressure from 10 kPa to 200 kPa to produce the corresponding 1-alkene at a selectivity of not less than 90% and a conversion of the starting ether of not less than 50%.
  • 2. The process according to claim 1, wherein the pore volume of the γ-alumina is not less than 1.1 cc/g and an average pore diameter of more than 190 Å.
  • 3. The process according to claim 2, wherein the temperature is from 280° C. to 330° C.
  • 4. The process according to claim 3, wherein the pressure is from 10 kPa to 200 kPa.
  • 5. The process according to claim 4, the alkane is a C6-8 alkane.
  • 6. The process according to claim 5, wherein the ether is a C1-2 alkyl ether.
  • 7. The process according to claim 6, wherein the temperature is from 290° C. to 320° C.
  • 8. The process according to claim 7, wherein the pressure is from 10 kPa to 100 kPa.
  • 9. The process according to claim 8, wherein the selectivity to the corresponding 1-alkene is greater than 95%.
  • 10. The process according to claim 9, wherein the conversion of the starting ether is not less than 65%.
  • 11. The process according to claim 10 wherein the average pore diameter is greater than 200 Å.
  • 12. The process according to claim 11, wherein the starting ether is methyl octyl ether and the corresponding 1-alkene is 1-octene.
Priority Claims (1)
Number Date Country Kind
2,538,206 Feb 2006 CA national