Abstract: A process for producing hydrogen peroxide with an oxidizing unit in an anthraquinone process can be performed. The process and oxidizing unit have a compressor for obtaining hot compressed oxygen containing gas. The hot compressed oxygen containing gas is utilized in a heat exchanger to increase the temperature of a compressed (cold) offgas obtained in an oxidizing step for the production hydrogen peroxide. Accordingly, the compressed and heated offgas can subjected to an expander without the formation of droplets or damaging the equipment. Moreover, the process and an oxidizing unit reduce the required amount of energy in the form of electrical power and steam, as well as the required amount of cooling medium in an anthraquinone process.

Abstract: An extraction method and a countercurrent liquid-liquid extraction column extracts a hydrogen peroxide containing oxidized working solution of an anthraquinone process. The extraction column includes a plurality of sieve trays, wherein at least one of said sieve trays is a valve sieve tray including a downcomer and at least one floating valve that includes a liftable opening member covering a valve hole in the valve sieve tray and can be lifted by the light phase below the sieve tray. A more stable operation of sieve tray extraction columns is possible by using a floating valve so that the flow rate of the oxidized working solution of an AO process and the daily production of hydrogen peroxide can be increased.

Abstract: A process and a facility for making hydrogen peroxide using the anthraquinone process can be performed. At least one steam turbine drives at least one rotating equipment and provides a steam flow with a pressure range of ?0.8 barg to 3 barg and a temperature range of 60 to 185° C. to an evaporator used in a distillation unit for concentrating an aqueous hydrogen peroxide extract.

Abstract: In a cyclic anthraquinone process for producing hydrogen peroxide, which comprises a distillation unit with vapor compression for concentrating hydrogen peroxide, aqueous condensate from the distillation unit is passed over a bed of a cation exchange resin in its protonated from to provide a purified condensate, and the purified condensate is used as extractant for extracting hydrogen peroxide in the anthraquinone process, as column reflux for the distillation unit or as a diluent for diluting an aqueous hydrogen peroxide solution.

Abstract: In a cyclic anthraquinone process for producing hydrogen peroxide, which comprises a distillation unit with vapor compression for concentrating hydrogen peroxide, aqueous condensate from the distillation unit is passed over a bed of a cation exchange resin in its protonated from to provide a purified condensate, and the purified condensate is used as extractant for extracting hydrogen peroxide in the anthraquinone process, as column reflux for the distillation unit or as a diluent for diluting an aqueous hydrogen peroxide solution.