Process for preparing a catalyst and use thereof
The present invention provides a process for preparing a catalyst, wherein said process comprises:—(i) preparing a mixture of one or more aromatic alcohol monomers and/or non-aromatic monomers, solvent, polymerization catalyst, crosslinking agent, suspension stabilizing agent and one or more metal salts, under conditions sufficient to produce polymeric beads doped with one or more metals or salts thereof; (ii) carbonizing, activating and then reducing the polymeric beads produced in step (i) to produce metal nanoparticles-doped porous carbon beads; (iii) subjecting the metal nanoparticles-doped porous carbon beads produced in step (ii) to chemical vapour deposition in the presence of a carbon source to produce metal nanoparticles-doped porous carbon beads comprising carbon nanofibers; and (iv) doping the metal nanoparticles-doped porous carbon beads comprising carbon nanofibers produced in step (iii) with an oxidant; catalyst prepared by said process; and a process for treating waste water from an industrial process for producing propylene oxide, which process comprises subjecting the waste water to a catalytic wet oxidation treatment in the presence of said catalyst.
1. A process for preparing a catalyst, wherein said process comprises:—
(i) preparing a mixture of one or more aromatic alcohol monomers and/or non-aromatic monomers, solvent, polymerization catalyst, crosslinking agent, suspension stabilizing agent and one or more metal salts, under conditions sufficient to produce polymeric beads doped with one or more metals or salts thereof;
(ii) carbonizing, activating and then reducing the polymeric beads produced in step (i) to produce metal nanoparticles-doped porous carbon beads;
(iii) subjecting the metal nanoparticles-doped porous carbon beads produced in step (ii) to chemical vapour deposition in the presence of a carbon source to produce metal nanoparticles-doped porous carbon beads comprising carbon nanofibers; and
(iv) doping the metal nanoparticles-doped porous carbon beads comprising carbon nanofibers produced in step (iii) with an oxidant by mixing the beads with an aqueous solution comprising the oxidant at a temperature in the range of from 40 to 60° C.
2. The process according to claim 1 , wherein the carbon source is selected from acetylene, benzene, xylene and toluene.
3. The process according to claim 1 , wherein the aromatic alcohol monomers and non-aromatic monomers are selected from one of more of phenol, vinyl benzyl alcohol, cresol, butylphenol and methyl (MMA).
4. The process according to claim 1 , wherein the suspension stabilising agent is selected from one or more of poly vinyl alcohol (PVA), gum acacia powder (GAP) and poly vinyl pyrrolidone.
5. The process according to claim 1 , wherein the oxidant is selected from one or more of KMnO 4 , K 2 S 2 O 8 and (NH 4 ) 2 S 2 O 8 .
6. The process according to claim 1 , wherein the metal is selected from one or more of aluminium, iron, nickel, copper, silver, cobalt, molybdenum, gold and platinum.
7. The process according to claim 6 , wherein the metal is selected from one or more of iron, nickel, copper and cobalt.
8. A catalyst prepared according to the process of claim 1 .
9. A process for treating waste water from an industrial process for producing propylene oxide, which process comprises subjecting the waste water to a catalytic wet oxidation treatment in the presence of a catalyst, wherein said catalyst is according to claim 8 .
10. The process according to claim 9 , wherein the waste water treatment is carried out at a temperature in the range of from 120 to 300° C. and a pressure in the range of from 2 to 15 MPa.