Physical processes > Sublimation > Sulfur > Patents

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Class Information
Number: 23/294S
Name: Chemistry: physical processes > Physical processes > Sublimation > Sulfur
Description:

Patents under this class:

Patent Number	Title Of Patent	Date Issued
4865693	Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride	Sep. 12, 1989
4865696	Recovery of metal chlorides from their complexes by molten salt displacement	Sep. 12, 1989
4650507	Wet and dry distillative freezing process for separating mixtures and apparatuses for use therein	Mar. 17, 1987
4578093	Wet and dry distillative freezing process for separating mixtures and apparatuses for use therein	Mar. 25, 1986
4451273	Distillative freezing process for separating volatile mixtures and apparatuses for use therein	May. 29, 1984
4391791	Low temperature sulfur recovery	Jul. 5, 1983
4378984	Distillative freezing process for separating volatile mixtures	Apr. 5, 1983
4368176	Desulfurizing roast of pyrite bearing polymetallic raw material	Jan. 11, 1983
4249921	Sulphur condensing apparatus	Feb. 10, 1981