The present invention relates to a process for the separation of strong acid from its salts. In said process, a strong acid salt is reacted with organic weak base (OWB) in the presence of a hydrophilic solvent and CO.sub.2. The cation of the strong acid salt is precipitated to produce a carbonate/bicarbonate salt and the strong acid form a liquid salt with the OWB. The above process is performed in a solution comprising both the strong acid salt and the WBO. In the next step, the strong acid is released from its OWB liquid salt and the OWB is returned to a previous step.

A method for the wet-chemical polishing of molded zinc parts, the molded parts being brought in contact with an acid solution and said acid solution containing only sulfuric acid and phosphoric acid as the strong acids.

A method for the wet-chemical polishing of molded zinc parts, the molded parts being brought in contact with an acid solution and said acid solution containing only sulfuric acid and phosphoric acid as the strong acids.

Metal oxide particles, preferably crystalline transition metal oxide particles, made via a continuous process comprising application of a voltage across an electrolyte solution. The electrolyte solution includes a transition metal salt dissolved in water, and preferably also includes a compound for increasing the electrical conductivity of the electrolyte. The particles made by the processes disclosed herein, can have sizes in the micrometer or nanometer ranges. The oxide particles can have a variety of uses, including for charge storage devices. As an example, crystalline manganese oxide nanoparticles, and methods for making the same, are disclosed for a variety of uses including lithium ion batteries.

Disclosed is an apparatus for preparing phosphoric acid from a fume exiting the kiln in a kiln phosphoric acid process, the apparatus comprises a hydration tower and an acid solution cyclical spraying system, a fume inlet of the fume exiting the kiln is disposed at a lower portion of the hydration tower, a fume outlet after hydration and absorption is disposed at the top, a spraying device is disposed in a cavity of the hydration tower above the fume inlet, a liquid inlet of the acid solution cyclical spraying system is disposed on a bottom of the hydration tower, a liquid outlet of the acid solution cyclical spraying system is connected to a liquid intake pipe of the spraying device. The present invention has the advantages of simple structure, reasonable layout, strong adaptability, high raw material utilization rate, reduced contaminant emissions, and high recovery rate of phosphoric acid etc.

A method for removal and recovery of phosphorus includes a precipitation step for precipitating phosphorus from a liquid stream comprising at most 30 mg of phosphorus per litre and at most than 50 mg of suspended solids per litre, using a precipitation agent, to form a precipitate, to form a precipitate; a first separation step for separating the precipitate from the liquid stream; a dissolution step for dissolving the precipitate in phosphoric acid to obtain a first solution; and a second separation step for separating the phosphoric acid and the precipitation agent.

This invention relates generally to new findings to improve a method of thermal energy storage or heat pump, i.e. increase the thermal energy from an external heat source, using a reversible condensation reaction with an inorganic oxoacid compound. It accordingly provides components to be used in said improved process as well as the use thereof in the aforementioned method, including the use in the manufacture of products of the condensation products or in the manufacture of the hydrolysis products.

This invention relates generally to new findings to improve a method of thermal energy storage or heat pump, i.e. increase the thermal energy from an external heat source, using a reversible condensation reaction with an inorganic oxoacid compound. It accordingly provides components to be used in said improved process as well as the use thereof in the aforementioned method, including the use in the manufacture of products of the condensation products or in the manufacture of the hydrolysis products.

The present invention relates to a process for the separation of strong acid from its salts. In said process, a strong acid salt is reacted with organic weak base (OWB) in the presence of a hydrophilic solvent and CO.sub.2. The cation of the strong acid salt is precipitated to produce a carbonate/bicarbonate salt and the strong acid form a liquid salt with the OWB. The above process is performed in a solution comprising both the strong acid salt and the WBO. In the next step, the strong acid is released from its OWB liquid salt and the OWB is returned to a previous step.

It is introduced that a device of manufacturing lithium sulfate comprising: a reaction body in which a reaction of lithium phosphate and sulfuric acid is performed, the reaction body being divided into an upper space and a lower space; a pressurizer for applying pressure to the inside of the reaction body; a stirrer disposed in the upper space for stirring the lithium phosphate and sulfuric acid to produce a mixture containing lithium sulfate and phosphoric acid; and a filter disposed inside the reaction body and separating the filtrate containing the phosphoric acid into the lower space by filtering the mixture.