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.

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.

The present invention relates to an improved process for manufacturing a purified aqueous hydrogen peroxide solution. The invention further relates to a plant for producing hydrogen peroxide in which the improved process for manufacturing a purified aqueous hydrogen peroxide solution according to the present invention is employed.

The present invention relates to an improved process for manufacturing a purified aqueous hydrogen peroxide solution. The invention further relates to a plant for producing hydrogen peroxide in which the improved process for manufacturing a purified aqueous hydrogen peroxide solution according to the present invention is employed.

The use of a single phase aqueous hydrogen peroxide composition, comprising from 5 to 75% by weight of hydrogen peroxide and from 3 to 150 mg/kg of at least one alkyl phosphate, the composition having a total organic carbon content from organic compounds other than alkyl phosphates of less than 200 mg/kg, reduces foam formation in a method for producing chlorine dioxide by reacting an alkali chlorate with hydrogen peroxide composition in an acidic aqueous medium boiling at sub-atmospheric pressure.

The use of a single phase aqueous hydrogen peroxide composition, comprising from 5 to 75% by weight of hydrogen peroxide and from 3 to 150 mg/kg of at least one alkyl phosphate, the composition having a total organic carbon content from organic compounds other than alkyl phosphates of less than 200 mg/kg, reduces foam formation in a method for producing chlorine dioxide by reacting an alkali chlorate with hydrogen peroxide composition in an acidic aqueous medium boiling at sub-atmospheric pressure.

An autoxidation process for producing hydrogen peroxide may be performed using a plant that includes at least two skid mounted modules selected from: a skid mounted module comprising at least one hydrogenator to hydrogenate an anthraquinone in a working solution; a skid mounted module comprising at least one oxidizer to oxidize the hydrogenated anthraquinone with oxygen to form hydrogen peroxide; optionally a skid mounted module configured to compress air to feed oxygen into the at least one oxidizer of the oxidizer skid, and when said air compressor skid is present, a further skid mounted module configured to recover solvent; a skid mounted module configured to extract the hydrogen peroxide from the working solution; and a skid mounted module comprising at least one means to deliver a hydrogen peroxide solution to a point of use and/or optionally to a storage tank.

Provided are a method and system for efficiently producing a purified aqueous hydrogen peroxide solution having a high purity. This method for producing a purified aqueous hydrogen peroxide solution comprises: step A for vaporizing a raw material containing a crude aqueous hydrogen peroxide solution; step B for condensing at least a portion of the gas and liquid obtained in step A, and separating the gas and liquid into a gas phase and a liquid phase; and step C for returning, into the raw material, at least a portion of a separation liquid which is the separated liquid phase, wherein step C further includes step D for adjusting the concentration of hydrogen peroxide in the separation liquid.

Provided are a method and system for efficiently producing a purified aqueous hydrogen peroxide solution having a high purity. This method for producing a purified aqueous hydrogen peroxide solution comprises: step A for vaporizing a raw material containing a crude aqueous hydrogen peroxide solution; step B for condensing at least a portion of the gas and liquid obtained in step A, and separating the gas and liquid into a gas phase and a liquid phase; and step C for returning, into the raw material, at least a portion of a separation liquid which is the separated liquid phase, wherein step C further includes step D for adjusting the concentration of hydrogen peroxide in the separation liquid.

The present disclosure relates to a hydrogen peroxide vapor decomposition and detoxification system including a hydrogen peroxide vapor suction unit which sucks hydrogen peroxide vapor in a target space to be sterilized, a hydrogen peroxide vapor decomposition and detoxification unit which decomposes the sucked hydrogen peroxide vapor, a vapor discharge unit which discharges decomposition products of the hydrogen peroxide vapor, and a control unit which controls an amount of vapor suction of the vapor suction unit, decomposition and detoxification of the hydrogen peroxide vapor decomposition and detoxification unit, and the vapor discharge unit.