Catalyst for purification of aromatic acids
AssigneeEngelhard Corporation
InventorJames Ferguson White
Life of this patent
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Abstract
One aspect of the invention relates to a catalyst composite containing an extruded catalyst support containing an extruded activated carbonaceous material having specifically a defined pore structure. For example, the extruded activated carbonaceous material may have pores wherein at least about 40 % of total Hg porosity occurs in pores having a diameter of about 200 Å and larger. Alternatively the extruded activated carbonaceous material may have a first set of pores having a pore diameter of at least about 40 Å and at most about 100 Å with a porosity of at least about 0.15 cc/g, and a second set of pores having a pore diameter of at least about 5,000 Å and at most about 20,000 Å with a porosity of at least about 0.3 cc/g.
Claims28
A catalyst composite comprising:
- an extruded catalyst support comprising an extruded activated carbonaceous material having pores and wherein at least about 40% of total Hg porosity occurs in pores having a diameter of about 200 Å and larger;
- and
- a precious metal catalyst.
A catalyst composite comprising:
- an extruded catalyst support comprising an extruded activated carbonaceous material having pores and wherein at least about 38% of total Hg porosity occurs in pores having a diameter of about 1,000 Å and larger;
- and
- a precious metal catalyst.
A catalyst composite comprising:
- an extruded catalyst support comprising an extruded activated carbonaceous material having pores and wherein at least about 34% of total Hg porosity occurs in pores having a diameter of about 5,000 Å and larger;
- and
- a precious metal catalyst.
A catalyst composite comprising:
- an extruded activated carbonaceous material comprising a first set of pores having a pore diameter of at least about 40 Å and at most about 100 Å with a porosity of at least about 0.15 cc/g, and a second set of pores having a pore diameter of at least about 5,000 Å and at most about 20,000 Å with a porosity of at least about 0.3 cc/g;
- and
- a precious metal catalyst.
A method of making a catalyst composite:
- mixing at least one carbonaceous material and a liquid to form a mixture;
- extruding the mixture into a shaped material;
- optionally drying the shaped material;
- heat treating the shaped material at a temperature from about 600° C. to about 1,500° C. to provide a catalyst support, wherein the catalyst support has at least about 40% of total Hg porosity in pores having a diameter of about 200 Å and larger;
- and
- contacting a precious metal catalyst with the catalyst support.
A method of purifying a crude polycarboxylic aromatic acid composition, comprising:
- contacting the crude polycarboxylic aromatic acid composition with a catalyst composite comprising
- an extruded activated carbonaceous material comprising a first set of pores having a pore diameter of at least about 40 Å and at most about 100 Å with a porosity of at least about 0.15 cc/g, and a second set of pores having a pore diameter of at least about 5,000 Å and at most about 20,000 Å with a porosity of at least about 0.3 cc/g;
- and
- a metal catalyst.
A method of purifying a crude polycarboxylic aromatic acid composition, comprising:
- contacting the crude polycarboxylic aromatic acid composition with a catalyst composite comprising
- an extruded activated carbonaceous material having pores and wherein at least about 40% of total Hg porosity occurs in pores having a diameter of about 200 Å and larger;
- and
- a metal catalyst.
A method of purifying a crude amine composition or a crude alkynol amine composition, comprising:
- contacting the crude amine composition or the crude alkynol amine composition with a catalyst composite comprising a catalyst support comprising
- an extruded activated carbonaceous material comprising a first set of pores having a pore diameter of at least about 40 Å and at most about 100 Å with a porosity of at least about 0.15 cc/g, and a second set of pores having a pore diameter of at least about 5,000 Å and at most about 20,000 Å with a porosity of at least about 0.3 cc/g;
- and
- a metal catalyst.
Dependencies are inferred from the claim text.