Patent classifications
C
CHEMISTRY; METALLURGY
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C01
INORGANIC CHEMISTRY
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C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
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25/00
Phosphorus; Compounds thereof
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C01B25/16
Oxyacids of phosphorus; Salts thereof
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C01B25/22
Preparation by reacting phosphate-containing material with an acid, e.g. wet process
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C01B25/222
with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
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