Patent GB-395421-A (GB)
Title: Improvements in and relating to the protection of solid compounds
IPC: C01B32/942
Filed: 1932-01-20
Abstract: Carbides (including calcium, magnesium, and calcium-magnesium carbides) are impregnated with a composition comprising (a) a distillation product, boiling at 175 DEG  C. or above, of a carbonaceous material such as petroleum, bituminous schists, wood tar, coal, brown coal, lignite, or their cracking or hydrogenation products, (b) a substance having, as such or in solution, a lower surface tension than water, and (c) a water-soluble mono-, di- or tri-hydric alcohol or a ketone.  As substances having, as such or in solution, a lower surface tension than water, mention is made of aliphatic esters, including animal and vegetable oils and fats, alkali salts of aliphatic acids, including soaps, saponin, aminoacids and their esters, casein, camphor, and animal and vegetable gums. The treatment protects the carbides against water vapour during storage or after use, and also restrains and regularizes their reaction with water.  The following examples of impregnating compositions are given: (1) fuel oil, coal tar oil boiling between 200 and 275 DEG  C., higher ketones, and olein; (2) coal tar oil free from phenol and naphthalene and boiling between 200 and 275 DEG  C., alcoholic soap solution, and butyl ricinoleate.  The Specification as open to inspection under Sect. 91 includes an example of an impregnating composition comprising gas oil, denatured alcohol, cetyl alcohol, and glyceryl stearate.  This subject-matter does not appear in the Specification as accepted.ALSO:Solid compounds which react with aqueous liquids are impregnated with a composition comprising (a) a distillation product boiling at 175 DEG  C. or above, of a carbonaceous material such as petroleum, bituminous schists, wood tar, coal, brown coal, lignite, or their cracking or hydrogenation products, (b) a substance having, as such or in solution, a lower surface tension than water, and (c) a water-soluble mono-, di- or tri-hydric alcohol or a ketone.  As substances having, as such or in solution, a lower surface tension than water, mention is made of aliphatic esters, including animal and vegetable oils and fats, alkali salts of aliphatic acids, including soaps, saponin, amino-acids and their esters, casein, camphor, and animal and vegetable gums.  The treatment protects the solids against water vapour during storage or after use, and also restrains and regularizes the reactions of the solids with aqueous liquids.  The treatment may be applied to sulphides, silicides, carbonates, peroxides, nitrides, phosphides, hydrides, and carbides (including calcium, magnesium, and calcium-magnesium carbides).  The following examples of impregnating compositions are given: (1) fuel oil, coal tar oil boiling between 200 and 275 DEG  C., higher ketones, and olein; (2) coal tar oil free from phenol and naphthalene and boiling between 200 and 275 DEG  C., alcoholic soap solution, and butyl ricinoleate.  The Specification as open to inspection under Sect. 91 refers to the impregnation of solids in general, and includes an example of an impregnating composition comprising gas oil, denatured alcohol, cetyl alcohol, and glyceryl stearate.  This subject-matter does not appear in the Specification as accepted.