Process for manufacturing a purified aqueous hydrogen peroxide solution
AssigneeSolvay SA
InventorsJuan-Teva Carlier, Pierre Dournel, Henk Venbrux, Hooghe Lieven
Life of this patent
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Abstract
A process includes preparing a crude aqueous hydrogen peroxide solution by auto-oxidation of at least one alkylanthraquinone in a working solution that includes at least one organic solvent and the at least one alkylanthraquinone; and washing the crude aqueous hydrogen peroxide solution with a mixture of at least one organic solvent and an organophosphorous chelating agent to create a purified aqueous hydrogen peroxide solution having less than 100 ppb Cr; wherein the organic solvent used for the washing is not part of the working solution and is not recycled into it.
Claims18
A process, comprising:
- preparing a crude aqueous hydrogen peroxide solution by auto-oxidation of at least one alkylanthraquinone in a working solution comprising at least one organic solvent and the at least one alkylanthraquinone;
- washing the crude aqueous hydrogen peroxide solution with a mixture of at least one organic solvent and an organophosphorous chelating agent to create a purified aqueous hydrogen peroxide solution having less than 100 ppb Cr;
- and
- reacting the purified aqueous hydrogen peroxide solution with propylene,
- wherein the organic solvent used for the washing is not part of the working solution and is not recycled into it.
A process for manufacturing propylene oxide (1,2-epoxypropane), comprising:
- reacting propylene with hydrogen peroxide;
- wherein the hydrogen peroxide is in an aqueous solution and is obtained by the auto-oxidation of at least one alkylanthraquinone, and
- wherein the hydrogen peroxide solution contains less than 100 ppb of Cr.
A process for manufacturing propylene oxide (1,2-epoxypropane), comprising:
- reacting propylene with hydrogen peroxide;
- wherein the hydrogen peroxide is in an aqueous solution and is obtained by the auto-oxidation of at least one alkylanthraquinone, and
- wherein the hydrogen peroxide solution contains less than 100 ppb of Al, less than 100 ppb of Fe, or less than 100 ppb of Al and less than 100 ppb of Fe.
A process, comprising:
- preparing a crude aqueous hydrogen peroxide solution by auto-oxidation of at least one alkylanthraquinone in a working solution comprising at least one organic solvent and the at least one alkylanthraquinone;
- and
- washing the crude aqueous hydrogen peroxide solution with a mixture of at least one organic solvent and an organophosphorous chelating agent to create a purified aqueous hydrogen peroxide solution having less than 100 ppb Cr;
- wherein the organic solvent used for the washing is not part of the working solution and is not recycled into it, and
- wherein the organophosphorus chelating agent is di-(2-ethylhexyl) phosphoric acid and the organic solvent is selected from the group consisting of trioctylphosphate, triethylhexylphosphate, dibutyl phosphoric acid, tributyl phosphate, trialkylphosphine oxides, and mixtures thereof.
Dependencies are inferred from the claim text.