A calcination and cement production apparatus comprising a calciner configured to be heated by combustion of a carbon based fuel and a hydrogen peroxide oxidant composition is disclosed.

A calcination and cement production apparatus comprising a calciner configured to be heated by combustion of a carbon based fuel and a hydrogen peroxide oxidant composition is disclosed.

The present invention relates to a process for the purification of an aqueous hydrogen peroxide solution, comprising at least one treatment on a reverse osmosis membrane and at least one electrodeionization treatment. The invention also relates to a process for the preparation of an aqueous hydrogen peroxide solution, comprising at least one stage of synthesis of an aqueous hydrogen peroxide solution, at least one treatment on a reverse osmosis membrane and at least one electrodeionization treatment of said solution. The invention also relates to an aqueous hydrogen peroxide solution capable of being obtained by the purification process or the preparation process, as are defined above.

The present invention relates to a new process configuration for the purification of an aqueous hydrogen peroxide (H.sub.2O.sub.2) solution containing organic impurities.

A photothermal catalytic method for production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule is provided. The method includes the following steps: uniformly mixing a porphyrin-based supermolecule photocatalyst with a concentration of 0.3-1.5 g/L with ultrapure water, conducting irradiation with a visible light for a period of time under stirring at a temperature of 40-80 C. and an O.sub.2 flow rate of 50-150 mL/min, and then filtering and concentrating a reaction liquid to obtain an aqueous hydrogen peroxide solution with a high concentration. The method is simple in operation, mild in reaction conditions and high in production of the hydrogen peroxide.

A photothermal catalytic method for production of hydrogen peroxide without a sacrificial reagent on the basis of a porphyrin-based supermolecule is provided. The method includes the following steps: uniformly mixing a porphyrin-based supermolecule photocatalyst with a concentration of 0.3-1.5 g/L with ultrapure water, conducting irradiation with a visible light for a period of time under stirring at a temperature of 40-80 C. and an O.sub.2 flow rate of 50-150 mL/min, and then filtering and concentrating a reaction liquid to obtain an aqueous hydrogen peroxide solution with a high concentration. The method is simple in operation, mild in reaction conditions and high in production of the hydrogen peroxide.