Patent GB-243394-A (GB)
Title: Improvements in or relating to the production of alkali polysulphides containing sulphur in a colloidal form
IPC: C01B17/34
Filed: 1924-05-23
Abstract: Alkali polysulphides containing sulphur in colloidal form are obtained by mixing with water sulphur or a sulphur-containing substance, a compound of boron, and a compound of sodium or potassium, heating the mixture to between 100 and 200 DEG  C. and straining the liquor obtained.  Soluble compounds of sodium, potassium, or boron may be used, for example the carbonate, bicarbonate, or hydroxide of sodium or potassium, soda ash or pearl ash, and borates such as orthoborates, metaborates, and pyroborates, and particularly borax, sodium orthoborates, and sodium metaborate. Boric oxide and boric acid may also be employed.  In an example, flowers of sulphur, borax, soda ash, and water are mixed together and ground to a thick sludge.  The mixture is then transferred to a steam-heated vessel, preferably of glass, porcelain, or aluminium, and heated to about 130 DEG  to 140 DEG  C. and filtered.  The liquor obtained may be diluted with water without precipitating the sulphur, or the sulphur may be obtained by precipitation with acid.  The liquor may contain up to 50 per cent by weight of sulphur.  The process may be applied to the extraction of sulphur from sulphur-bearing ores, oil-bearing shale containing sulphur, or sulphur-containing oils and hydrocarbons.ALSO:Alkali polysulphides containing sulphur in colloidal form are obtained by mixing, if necessary with water, sulphur-containing oils and hydrocarbons or oil-bearing shale, a compound of boron and a compound of sodium or potassium, heating the mixture to between 100 and 200 DEG  C. and straining the liquor obtained. Soluble salts of sodium, potassium or boron may be used, for example the carbonate, bicarbonate, or hydroxide of sodium or potassium, soda ash or pearl ash, and borates such as orthoborates, metaborates, and pyroborates, and particularly borax, sodium orthoborate, and sodium metaborate.  Boric oxide and boric acid may also be employed.ALSO:Alkali polysulphides containing sulphur in colloidal form are obtained by mixing with water sulphur or a sulphur containing substance, a compound of boron and a compound of sodium or potassium, heating the mixture to between 100 and 200 DEG  C. and straining the liquor obtained.  Soluble salts of sodium, potassium or boron may be used, for example the carbonate, bicarbonate, or hydroxide of sodium or potassium, soda ash or pearl ash, and borates such as orthoborates, metaborates, and pyroborates, and particularly borax, sodium orthoborate, and sodium metaborate. Boric oxide and boric acid may also be employed.  In an example, * 50 parts by weight of flowers of sulphur, 25 parts of borax, 25 parts of soda ash and 100 parts of water are mixed together and ground to a thick sludge.  The mixture is then transferred to a steam-heated vessel, preferably of glass, porcelain or aluminium, and heated to about 130 DEG  to 140 DEG  C and filtered.  The liquor obtained may be diluted with water without precipitating the sulphur, or the sulphur may, if desired, be obtained by precipitation with acid.  The liquor may contain up to 50 per cent by weight of sulphur.  The process may be applied to the extraction of sulphur from sulphur-bearing ores, oil-bearing shale containing sulphur, or the like, or sulphur-containing oils and hydrocarbons.