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Expired
Application number
GB27016/19A
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Individual
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Individual
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Publication of GB138594ApublicationCriticalpatent/GB138594A/en
C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
C01G37/00—Compounds of chromium
C01G37/08—Chromium sulfates
C01G37/10—Chrome alum
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Chemical & Material Sciences
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Organic Chemistry
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Inorganic Chemistry
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Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means
(AREA)
Abstract
Chrome alum is obtained by dissolving ferro chrome in sulphuric acid, the ferro chrome being ground to a fine powder and the mixture well heated and stirred, and adding a soluble potassium salt to the resulting solution of chromic and ferrous sulphates, when pure chrome alum is crystallized out. The content of iron may be previously reduced in part by crystallizing out the ferrous sulphate. The Specification as open to inspection under Sect. 91 (3) (a) also states that the solution of ferro chrome in sulphuric acid proceeds more rapidly in leaden vessels. This subject-matter does not appear in the Specification as accepted.
GB27016/19A1919-02-061919-11-03Process for manufacturing chrome alum
ExpiredGB138594A
(en)