Abstract: Process using collectors for the flotation of minerals which allow the separation or enrichment of certain minerals, even at pH values around 7. These collectors are organic sulphides of the type R--S--R', in which the two groups R and R' are different and at least one of them preferably carries a substituent including oxygen or sulphur. The collectors are desirably used in a proportion of 10-100 ppm in relation to the weight of the mineral subject to flotation.

Abstract: A method of treating stored coal to prevent dusting and reduce moisture penetration of the coal, comprising forming a hardened crust of a hydrated calcium sulfate containing composition over the exposed surface of the coal pile. The calcium sulfate product produced from the fluid bed combustion of coal in the presence of limestone is particularly useful.

Abstract: Zinc sulfide is concentrated by a froth flotation process using a substituted benzotrifluoride compound as depressant for calcium fluoride. The benzotrifluoride compounds are substituted by hydrophilic groups such as hydroxy, carboxylic acid and amino.

Abstract: Certain condensation products of a fatty acid or fatty acid ester and a hydroxyalkylated alicyclic nitrogen-containing compound are useful as conditioners to improve the recovery of clean coal in a froth flotation process. The presence of these condensation products in the flotation medium is particularly effective to enhance the recovery of oxidized bituminous coal.

Abstract: A collector agent for use in froth flotation processes to recover metal values of sulphide ores is disclosed which agent comprises the reaction product resulting from mixing and reacting in the presence of visible light, heat, or both, a mixture of:(i) a mixture of hydrocarbons having from 5 to 10 (inclusive) carbon atoms,(ii) methyl isobutyl carbinol (MIBC),(iii) ethyl xanthyl ethylformic ester (EEF), and(iv) elemental sulphur (S).

Abstract: The invention relates to a biological activator for septic tanks. The biological activator is characterized by the fact it is in the form of a non-corrosive, non-toxic, finely-divided product having a significant specific surface constituting a base for the optional anaerobic microbic flora, permitting an increase in the density of bacterial saturation in the septic tank for an equivalent quantity of nutriment.

Abstract: A collector composition for use in concentrating metallic mineral ores by froth flotation which comprises a mixture of a mercaptan and an emulsifying or wetting agent adapted to improve the dispersion of the mercaptan into the pulp, and a froth flotation method for concentrating metallic mineral ores wherein the above collector composition is employed as the collector, are disclosed herein.

Abstract: A combination of conventional frothing agent and a particular amino-aldehyde resin provides better recovery of mineral values than can be obtained with either agent alone.

Abstract: The mixture of a hydrophobic alcohol and a nonionic surfactant is an effective dewatering aid for mineral concentrates, significantly lowering the moisture content.

Abstract: A conditioning agent comprising a frother and a bis(alkyl)ester of a sulfosuccinic acid salt provides high coal recovery with reduced ash content.

Abstract: Process for flotation of copper sulfide ones using a flotation reagent produced by the reaction of an alkali metal lower alkyl xanthate and 2-chloroisopropyl formate.

Abstract: A process is provided for the flotation of ores, wherein compounds of the formula RO-(C.sub.x H.sub.2x O).sub.n CH.sub.2 COOM, wherein R is an aliphatic residue of 8-18 carbon atoms or an alkylaryl residue having 6-12 carbon atoms in the alkyl moiety, n has an average value of 0-10 and x has a value of 2 or 3, and M is a monovalent cation, are used as collectors, together with the usual fatty acid type collectors, these collector mixtures possessing synergistic properties. Also collector mixtures for use in such a process are provided.

Abstract: Combinations of fatty acids and anionic perfluoroalkyl compounds are superior collectors in the froth flotation of non-sulfide minerals.

Abstract: A collector combination of a fatty acid and an N-sulfodicarboxylic acid aspartate provides boostering action in the recovery of non-sulfide minerals.

Abstract: A combination of a fatty acid and an alkylamidoalkyl monoester of a sulfosuccinic acid or salt thereof provides improved recovery of non-sulfide ores by froth flotation.

Abstract: A combination of fatty acid and a monoester of sulfosuccinic acid or salt thereof provides improved recovery of non-sulfide ores by froth flotation.

Abstract: The performance of xanthogen formates as reagents for the flotation of sulfide copper ores is significantly improved by reacting the xanthogen formate with an aromatic amine. In a preferred embodiment, up to about 20% of an aromatic diamine, most particularly o-phenylene diamine and o-toluene diamine, is used.

Abstract: Beneficiation of complex non-sulfide ores such as fluorspar is effected by flotation using organic compounds containing the CF.sub.3 group as selectivity agents.

Abstract: An improved gypsum dispersion frothing composition is presented comprised of a first component which is a neutralized sulfonic acid or neutralized sulfuric acid ester and a second component which is a neutralized dipropyl benzene sulfonate or a mixture of neutralized alkyl benzene sulfonates containing at least 50% neutralized dipropyl benzene sulfonate. The preferred member of the first component is neutralized alkyl benzene sulfonates having 10 to 14 alkyl carbon atoms, and the preferred second component is neutralized diisopropyl benzene sulfonate. The preferred neutralizing agents are sodium, ammonium ion, or triethanolamine. The frothing composition is preferably used at a concentration of 0.01 to 0.1 parts per 100 parts of gypsum.

Abstract: Cationic polyelectrolytes are formed by the polymerization in absence of oxygen of a monomer of the general formula: ##STR1## where x is 3 or more than 6 and Z is I, Br or Cl to form high charge density linear polymers. Segments of the linear polymer may be attached to or formed in the presence of polyfunctional reactive tertiary amines or halogen polymeric substrates or polyfunctional lower molecular reactive polyfunctional substrates to form branched or star polyelectrolytes by a quaternization polymerization reaction.

Abstract: The use of a secondary alcohol or an ethoxylated secondary alcohol in conjunction with conventional fatty acid in the flotation of non-sulfide minerals eliminates or reduces requirements for fuel oil usage.

Abstract: The quality of dialkyl dithiophosphates as flotation promoters is improved by addition to the neutralized acid of small quantities of a trialkyl amine. More important, promoters thus stabilized exhibit markedly increased storage life and substantially no tendency to corrode steel. Shipping and storage of these products is thus facilitated.

Abstract: A process for concentrating and recovering water soluble glycosides from aqueous solution by foaming the solution, collecting the foam as a concentrated-in-glycoside product.

Abstract: Surface active compositions useful as cationic emulsifiers, flotation agents, corrosion inhibitors and the like are provided in the form of an admixture of a long chain aliphatic primary mono-amine or a similarly substituted trimethylenediamine and an alkoxylated derivative of said mono-amine. Additionally disclosed are the alcoholic concentrates of the aforesaid compositions. Such compositions and concentrates thereof are characterized in being homogenous liquids further exhibiting freeze-thaw stability and excellent dispersibility in water at ambient temperatures for forming their acid salts.

Abstract: The quality of dialkyl dithiophosphates as flotation promoters is improved by addition to the neutralized acid of small quantities of a trialkyl amine. More important, promoters thus stabilized exhibit markedly increased storage life and substantially no tendency to corrode steel. Shipping and storage of these products is thus facilitated.

Abstract: Metal ions are effectively eliminated from aqueous solutions containing the ame by treating the solution with a metal sequestering agent which is a condensation product of a higher alkyl halide with a polyamine.