Back to results
US 2001/0044559 A1Published application
Process for catalytic hydroxylation of benzene
AssigneeShell Oil Company
InventorDavid Morris Hamilton JR.
Life of this patent
Estimating the term…
Abstract
A process for hydroxylating benzene under catalytic distillation conditions to produce hydroxylated products such as phenol is provided. The process provides for direct hydroxylation of liquid phase benzene with an oxidant and a zeolite catalyst under conditions effective to prevent coke formation on the catalyst.
Claims49
A process comprising:
- continuously contacting, in a distillation column reactor comprising a reaction zone and a distillation zone, benzene with a zeolite catalyst effective to hydroxylate benzene and an oxidant at a temperature in the range of from above 100° C. to 270° C. thereby producing a hydroxylated product, wherein at least a portion of said benzene being in a liquid phase;
- continuously separating said hydroxylated product from the un-reacted benzene in the distillation zone under conditions effective to vaporize said un-reacted benzene and maintain said hydroxylated product in a liquid phase;
- and
- recovering the said hydroxylated product from the distillation column reactor.
1 more element
A process comprising
- continuously contacting, in a distillation column reactor comprising a reaction zone and a distillation zone, benzene with an oxidant in a distillation column reactor at a temperature in the range of from above 100° C. to 270° C. and a benzene partial pressure in the range of from about 0.1 atm to about 45 atm to form phenol wherein at least a portion of said benzene being in a liquid phase, said distillation column reactor comprising a zeolite catalyst effective to hydroxylate said benzene;
- and
- continuously separating said phenol from the un-reacted benzene in the distillation zone under conditions effective to vaporise said un-reacted benzene and maintain said phenol in a liquid phase;
- and
- recovering the said phenol from the distillation column reactor.
2 more elements
A process for catalytic hydroxylation of benzene comprising:
- continuously contacting, in a distillation column reactor comprising a reaction zone and a distillation zone, benzene with an oxidant in a distillation column reactor at a temperature in the range of from above 100° C. to 270° C. and a benzene partial pressure in the range of from about 0.1 atm to about 45 atm to form phenol wherein at least a portion of said benzene being in a liquid phase, said distillation column reactor comprising a zeolite catalyst effective to hydroxylate said benzene;
- and
- continuously separating said phenol from the un-reacted benzene in the distillation zone by fractional distillation;
- and
- recovering the said phenol from the distillation column reactor.
2 more elements
Dependencies are inferred from the claim text.