… action of sulphur vapours on burning carbon. Colourless, toxic liquid (specific gravity about 1.3). Not miscible with … either from natural sulphides, or from arsenic or arsenous oxide by treatment with sulphur or hydrogen sulphide. (a) … halogens (e.g., sulphur chlorides) ( heading 28.12 ). (b) Oxysulphides (e.g., of arsenic, carbon and silicon), and the …
… or resin acids in a solution of sodium or potassium hydroxides. The other inorganic resinates are generally … polyhydric alcohol, of rosin or resin acids or, of their oxidised, hydrogenated, disproportionated (dehydrogenated) …
… sacks or envelopes 8441.30 ‑ Machines for making cartons, boxes, cases, tubes, drums or similar containers, other than … for cutting, outlining or grooving paperboard for cartons, boxes, file covers, etc. (4) Machines for making paper …
… include compounds of hydrogen with the following elements : oxygen ( headings 22.01 , 28.45 , 28.47 and 28.53 ), … or by heating at a higher temperature a mixture of oxide and carbon in a current of nitrogen or ammonia gas. … sodium amide, or from hydrazine, ethyl nitrite and sodium hydroxide; colourless crystalline flakes. Soluble in water, …
… pickling, scraping and other processes to remove the oxide scale and crust formed during the heating of metal. … intended solely to protect products from rust or other oxidation, to prevent slipping during transport and to … (by various chemical processes, such as immersion in an oxidising solution), patina finishing, blueing (blue …
… for metal surfaces . These are preparations used to remove oxides, scale, rust or tarnish from the surface of metals, … the metal surfaces to be joined and the solder itself from oxidation. They have the property of dissolving the oxide …
… is designed to convert the bauxite into pure aluminium oxide (alumina). For this purpose the ground ore is calcined and then treated with sodium hydroxide to produce a solution of sodium aluminate; this is …
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