Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Richard Wolffenstein
Oskar Boeters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of GB190628449ApublicationCriticalpatent/GB190628449A/en
Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water
(AREA)
Acyclic And Carbocyclic Compounds In Medicinal Compositions
(AREA)
Food Preservation Except Freezing, Refrigeration, And Drying
(AREA)
Abstract
28,449. Wolffenstein, R., and Boeters, I. O. Dec. 18, 1905, [date applied for under Patents Act, 1901]. Concentrating nitric acid.-Nitric acid is concentrated by treatment with water-binding nitrate such as calcium or magnesium nitrates. In the example, calcium nitrate is dehydrated by heat, partly cooled, and treated with the weak acid. On renewed heating, concentrated acid distils over. The calcium nitrate which remains is again dehydrated. It is advantageous to conduct the process by running the weak acid on to nitrate which has absorbed a considerable quantity of water, the stronger acid produced meeting nitrate containing less water, and so on.
GB190628449D1905-12-181906-12-13Improvements in Process for the Concentration of Dilute Nitric Acid.
ExpiredGB190628449A
(en)