Specification of David Forbes and Astley Paston Price : treating sewage and producing manure.

  • Forbes, David.
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Specification of David Forbes and Astley Paston Price : treating sewage and producing manure. Source: Wellcome Collection.

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    Forbes Sf Price's Impts. in Treating Sewage and Producing Manure. two parts by weight of tlie soluble phosphates of alumina to every one thousand parts by weight of sewage treated, but we do not limit ourselves to such proportions. This Invention consists, secondly, in subjecting such natural phosphates 5 of alumina as are herein-before referred to, to a preliminary treatment with hydrochloric acid so as to remove certain impurities, such, for example, as carbonate of lime, and then subjecting the residuum to the action of sulphuric acid in the manner and for the purposes described in the Specification of Letters Patent granted to us and bearing date the 10 Second March One thousand eight hundred and seventy, No. 607. Having now described and particularly ascertained the nature of our said Invention and the manner in which the same is or may be used or carried into effect we would observe in conclusion that what we consider to be novel and original and therefore claim as the Invention 15 secured to us by the herein-before in part recited Letters Patent is,— Pirst. The use of the natural phosphates of alumina for the treatment of sewage and for the production of manure, by firstly submitting the natural phosphates of alumina to the action of hydrochloric acid or 20 mixtures of hydrochloric and sulphuric acids, and the employment of such resulting products either alone or in conjunction with a base, such as lime or carbonate of lime, for the treatment of sewage, substantially in the manner herein-before described. Second. The subjecting of the herein-before mentioned natural plios- 25 phates of alumina to a preliminary treatment with hydrochloric acid for the purposes herein-before mentioned. In witness whereof, we, the said David Porbes and Astley Paston Price, have to this our Specification set our hands and seals, the Nineteenth day of October One thousand eight hundred and 3Q seventy. DAVID PORBES. (l.s.) ASTLfiY PASTON PRICE, (l.s.) LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen’s most Excellent Majesty. 1870.