GB481934A - Improvements in and relating to sulphidised materials obtained from naturally occurring resins - Google Patents

Abstract

Sulphidized oils, useful as flotation agents and in the production of insecticides, fungicides &c., are made by sulphidizing oils derived from the distillation of naturally occurring resins other than the resins derived from the sap of the genera Pinus, Abies, Picea, Larix, and Truga. The oil which is sulphidized preferably is one having a relatively high iodine number, and is preferably obtained by distilling the resin in the presence of a basic material such as lime; the oil thus obtained may be further distilled or cracked before sulphidizing; and after sulphidizing the oil may be separated into fractions. A sulphidized oil may be prepared by gradually heating a mixture of Congo Copal and quicklime for 4 hours to incipient red heat, collecting the oil by passing the evolved vapours through a water-cooled condenser, adding 20 gms. of sulphur to 200 cc. of this oil, and heating the mixture gently to a temperature of about 200 DEG C. for 30 minutes under a reflux condenser. Specification 480,436 is referred to.ALSO:Sulphidized products, useful as flotation agents and in the production of insecticides, fungicides, &c., are made by sulphidizing oils derived from the distillation of naturally occurring resins other than the resins derived from the sap of the genera Pinus, Abies, Picca, Larix, and Touga. The oil which is sulphidized preferably is one having a relatively high iodine number, and is preferably obtained by distilling the resin in the p presence of a basic material such as lime; the oil thus obtained may be further distilled or cracked before sulphidizing; and after sulphidizing the oil may be separated into fractions. A sulphidized product may be prepared by gradually heating a mixture of Congo Copal and quicklime for 4 hours to incipient red heat, collecting the oil by passing the evolved vapours through a water-cooled condenser, adding 20 gms. of sulphur to 200 cc. of this oil and heating the mixture gently to a temperature of about 200 DEG C. for 30 minutes under a reflux condenser. Specification 480,436, [Group XII], is referred to.ALSO:Products which can be employed alone or in association with disseminating or distributing agents as, or in the production of, insecticides, fungicides, &c., are made by sulphidizing oils derived from the distillation of naturally occurring resins other than the resins derived from the sap of the Geneva Pinus, Abies, Picea, Larix, and Tsuga. The oil which is sulphidized preferably is one having a relatively high iodine number, and is preferably obtained by distilling the resin in the presence of a basic material such as lime; the oil thus obtained may be further distilled or cracked before sulphidizing; and after sulphidizing the oil may be separated into fractions. Specification 480,436, [Group XII], is referred to.ALSO:Products which are particularly useful as flotation agents are obtained by sulphidizing oils derived from the distillation of naturally occurring resins other than the resins derived from the sap of the genera Pinus, Abies, Picea, Larix and Tsuga. The sulphidizing may be effected by heating with sulphur under a reflux condenser. The oil which is sulphidized preferably is one having a relatively high iodine number, and is preferably obtained by distilling the resin in the presence of a basic material such as lime; the oil thus obtained may be further distilled or cracked before sulphidizing; and after sulphidizing the oil may be separated into fractions. The products act as collectors for sulphide minerals, artificially sulphidized minerals, and metallic minerals such as native copper, silver or gold; they may be used in conjunction with frothers and with other collectors such as xanthates or aerofloat. They may be dissolved in caustic alkali and the solution added to the pulp, or they may be added as emulsions, made for example with emulsifying agents such as soap or in the presence of protective colloids such as a solution of copal dust in caustic soda. In some cases the frothing agent, e.g. pine oil or cresol, may be added to the sulphidized oil before emulsifying. A substance soluble in both the oil and the water, e.g. ethyl alcohol, may be added when making the emulsion. The treatment of a copper ore, a synthetic galena-quartz mixture, and a gold ore containing pyrite, arsenopyrite, free gold, graphite, quartz, sericite, tourmaline, and felspars, is described, sulphidized oil being used in conjunction with pine oil and, in some cases, calcium polysulphide or sodium sulphide. A sulphidized oil may be prepared by gradually heating a mixture of Congo Copal and quicklime for 4 hours to incipient red heat, collecting the oil by passing the evolved vapours through a water-cooled condenser, adding 20 gms. of sulphur to 200 cc. of this oil, and heating the mixture gently to a temperature of about 200 DEG C. for 30 minutes under a reflux condenser. The sulphidized products may be employed alone or in association with disseminating or distributing agents as, or in the production of insecticides, fungicides, &c. Specification 480,436 is referred to.