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Expired
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GB10503/29A
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IG Farbenindustrie AG
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IG Farbenindustrie AG
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Publication of GB309090ApublicationCriticalpatent/GB309090A/en
C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G23/00—Compounds of titanium
C01G23/008—Titanium- and titanyl sulfate
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Developing Agents For Electrophotography
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Abstract
309,090. I. G. Farbenindustrie Akt.- Ges. April 4, 1928, [Convention date]. Titanium sulphate.-Concentrated titanyl or titanic sulphate solutions, having a low content of free sulphuric acid, are produced by introducing into a moderately heated solution of metatitanic acid in sulphuric acid, the temperature of which should not exceed 60‹ C., first meta-titanic acid until saturation is reached, and then orthotitanic acid, and concentrating the solution in vacuo. The titanic acid can be added in the solid form, or as an aqueous solution.
Improved cyclic process forthe recovery of sulphates andiron compounds from solutions of ferrous sulphate and sulphuric acid, especially waste pickle liquors
Improved cyclic process forthe recovery of sulphates andiron compounds from solutions of ferrous sulphate and sulphuric acid, especially waste pickle liquors