Publication

Sulfur-free mineral acids

Albert Renken
1977
Patents

Abstract

SO2 is removed from mineral acids, e.g., HCl, in an exchange column consisting of an absorption section with 5-10 plates, a cooling section, and a stripping section with 10-15 plates at the bottom. The choice of stripping gas is detd. by the subsequent treatment of the SO2. Thus, when a 50:50 gaseous mixt. of HCl and SO2 is fed into the absorption section (70-85 Deg) at 120 L/h with air (stripping gas) fed at 40 L/h into the stripping section (15 Deg) and water at a rate to give a 30 or 20% concn. of HCl, the purified acid contains SO2

Official source

https://infoscience.epfl.ch/entities/publication/c5354438-719d-47ae-87ae-c5148fa924a6

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Albert Renken
1977
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c5354438-719d-47ae-87ae-c5148fa924a6

About this result

Related concepts (32)

Waste

Waste (or wastes) are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention that raises a waste product's value above zero. Examples include municipal solid waste (household trash/refuse), hazardous waste, wastewater (such as sewage, which contains bodily wastes (feces and urine) and surface runoff), radioactive waste, and others.

Waste-to-energy

Waste-to-energy (WtE) or energy-from-waste (EfW) is the process of generating energy in the form of electricity and/or heat from the primary treatment of waste, or the processing of waste into a fuel source. WtE is a form of energy recovery. Most WtE processes generate electricity and/or heat directly through combustion, or produce a combustible fuel commodity, such as methane, methanol, ethanol or synthetic fuels. The first incinerator or "Destructor" was built in Nottingham, UK, in 1874 by Manlove, Alliott & Co.

Sulfur

Sulfur (also spelled sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals.

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Sulfur-free mineral acids

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