Patent GB-191327963-A (GB)
Title: Improvements in, and connected with, the Manufacture of Hydrogen.
Inventor: JOHNSON JAMES YATE
IPC: C01B3/16
Filed: 1913-12-04
Granted: 1915-07-15
Abstract: 27,963. Johnson, J. Y., [Badische Anilin & Soda Fabrik]. Dec. 4. [Cognate Application, 8029/14.] Catalytic agents; preparation, of; hydrogen, catalytic production of from steam and carbon monoxide.-Hydrogen is produced by passing a mixture of carbon monoxide and steam over a mixture containing a catalytic agent and a body which promotes the activity of the catalytic agent. Suitable catalytic mixtures consist of iron, nickel, or cobalt, or oxides thereof, mixed with oxygen compounds of chromium, thorium, uranium, beryllium, or antimony; iron mixed with less than its weight of nickel; iron oxide of low activity coated with finely divided iron oxide prepared at a low temperature; or zinc, lead, copper, vanadium, manganese, or titanium, together with a promoter. The efficiency of a given substance as a promoter may be determined by carrying out parallel tests with the catalyst with and without the substance in question. The contact masses may be in powder, porous lumps, &c., and binders, carriers, &c. may be added. The production of hydrogen is preferably effected at temperatures not exceeding 600‹ C. Any suitable gas mixture may be used, and the bulk of the carbon monoxide may be first removed therefrom catalytically, or otherwise, if desired; sulphuretted hydrogen &c. may be removed previously by means of copper &c. The presence of chlorine, phosphorus, boron, or silicon, in the catalytic mixture, should be avoided, if necessary. The following examples of the preparation of the catalytic mixtures are given:- a mixed solution of ferric and chromium nitrates, with or without aluminium nitrate, is precipitated by ammonia, and the hydroxides are filtered off and pressed into suitable shapes; a mixture of ferric nitrate, ammonium chromate, and thorium nitrate is heated to give the oxides; a mixed solution of ferric nitrate, nickel nitrate, and chromium nitrate is precipitated by potassium carbonate, the precipitate is filtered, washed, shaped, and dried; iron oxide produced at a high temperature is mixed with moist ferric hydroxide, made into lumps, and dried; fine-meshed iron wire netting is - treated with ferric nitrate solution, and heated to decompose the nitrate; chromium, nickel, or aluminium nitrate may also be added; zinc oxide is mixed with chromium nitrate and heated to decompose the nitrate; chromium nitrate or acetate is precipitated by ammonia, the hydroxide is mixed with precipitated zinc oxide, shaped, and dried ; beryllium oxide may also be used; a mixture of lead nitrate or acetate and uranium nitrate solution is precipitated with ammonia, the precipitate is filtered, made into lumps, and heated; copper and zirconium nitrate solution is precipitated by sodium or potassium carbonate, filtered, the alkali salt washed out partly or completely, and the product moulded and dried; mixtures of oxides of manganese and chromium, titanium and antimony, vanadium and chromium, or chromium and thorium, are also suitable; alumina, alkali carbonates, &c. may be added as binding agents or promoters; a solution containing cerium and' chromium nitrates is precipitated with ammonia, the precipitate filtered off. partly dried, made into a paste, shaped, and dried ; other rare earth salts may replace the cerium nitrate. Reference has been directed by the Comptroller to Specifications 27,955/12 and 8864/13.