Abstract: This invention related to a process for the deinking of office wastepaper stocks which includes: converting the wastepaper to a pulp, contacting the pulp with an aqueous medium of alkaline pH containing between about 0.05 and about 2 percent by weight, calculated on a dry weight basis of the pulp, of a deinking agent which is at least one fatty alcohol having in the range of from about 8 to about 18 carbon atoms, without the use of other deinking agents, and treating the resulting pulp-containing medium by washing or flotation to removed suspended ink therefrom.

Abstract: The invention therefore relates to a process for the deinking of wastepaper stocks which comprises:a) converting the wastepaper to a pulp and contacting said pulp with an aqueous medium of alkaline pH containing a surface active deinking agent, andb) subjecting the resulting pulp-containing medium to one or more flotation steps wherein said final flotation step is carried out at a pH of less than about 7 to remove suspended ink therefrom and to condition said pulp-containing medium for subsequent addition to a paper machine.

Abstract: The invention relates to a process for the deinking of wastepaper stocks comprising converting the wastepaper to a pulp and contacting said pulp with an aqueous medium having a pH of about 7 or less containing a surface active deinking agent, and thereafter subjecting the resulting pulp-containing medium to one or more wash and/or flotation steps which is carried out at a pH of about 7 or less to remove suspended ink therefrom and to condition said pulp-containing medium for subsequent addition to a paper machine.

Abstract: A process to produce a stable suspension of block copolymer particles in a water medium, and a stable suspension of block copolymer particles in a water medium is provided. The block copolymer is a polar functional group-containing vinyl aromatic/conjugated diolefin block copolymer which may optionally be hydrogenated. The use of C.sub.15 to C.sub.24 linear alkyl aromatic sulfonates has been found to be critical in preparation of these stable dispersions.

Abstract: A process to produce a stable suspension of block copolymer particles in a water medium, and a stable suspension of block copolymer particles in a water medium is provided. The block copolymer is a polar functional group--containing vinyl aromatic/conjugated diolefin block copolymer which may optionally be hydrogenated. The use of C.sub.15 to C.sub.24 linear alkyl aromatic sulfonates has been found to be critical in preparation of these stable dispersions.

Abstract: Improved gas foam flooding surfactants and gas foam-forming mixtures wherein the surfactants are enriched in olefin disulfonate. The surfactants may be used in either a gas drive or a gas soak process. Use of the disulfonate-enriched gas foam surfactants and mixtures in a gas flooding operation is also described.

Abstract: An improved process for recovering oil by flowing a mixture of steam and steam foam surfactant into an oil-containing subterranean reservoir, the improvement provided by using surfactants enriched in olefin disulfonate. The surfactants may be used in either a steam drive or a steam soak process. Disulfonate-enriched steam foam surfactants and mixtures are also described.

Abstract: This invention provides a process for the hydraulic fracturing of a subterranean formation, which comprises introducing into the formation under fracturing pressure a fracturing fluid comprising solid particulate suspended in a fluid dispersion comprising water, a specified gaseous or supercritical component, and a surfactant component selected from a certain class of polysaccharide compounds. For purposes of this invention, the gaseous or supercritical carbon dioxide and gaseous nitrogen, carbon dioxide and C.sub.1 to C.sub.3 hydrocarbons, and mixtures thereof. The polysaccharide component comprises one or more surfactants of the formula RO(R.sup.1 O).sub.x Sacc.sub.z, wherein R is a monovalent organic radical having a carbon number in the range from about 7 to 24, R.sup.1 represents a divalent hydrocarbon radical containing from about 2 to about 4 carbon atoms, x is a number having an average value in the range from 0 to about 12.0, and Sacc.sub.z represents an average number z between about 0.7 and 10.

Abstract: An improved process for recovering oil by flowing a mixture of steam and steam foam surfactant into an oil-containing subterranean reservoir, the improvement provided by using surfactants enriched in olefin disulfonate. The surfactants may be used in either a steam drive or a steam soak process. Disulfonate-enriched steam foam surfactants and mixtures are also described.

Abstract: An improved process for recovering oil by injecting a mixture of noncondensible gas and gas foam surfactant into an oil-containing subterranean reservoir, the improvement provided by using a surfactant enriched in olefin disulfonate. The sulfactant may be used in either a gas drive or a gas soak process. Disulfonate-enriched gas foam surfactants and mixtures are also described.

Abstract: The mobility of fluids in substantially oil-free zones of subterranean formations is controlled by introducing a composition comprising (a) water, (b) a fluid component selected from the group consisting of carbon dioxide, nitrogen, C.sub.1 to C.sub.3 hydrocarbons, and mixtures thereof, and (c) one or more polysaccharide surfactants of the formula RO(R.sup.1 O).sub.x Sacc.sub.z, wherein R is a monovalent organic radical having a carbon number in the range from about 7 to 24; R.sup.1 represents a divalent hydrocarbon radical containing from about 2 to 4 carbon atoms; x is a number having an average value in the range from 0 to about 12; and Sacc.sub.z represents an average number z between about 0.7 and 10 of moieties derived from reducing saccharides containing 5 or 6 carbon atoms. The resulting mixture of components (a), (b), and (c) forms a dispersion, or a "foam" as that term is commonly used in the art, which is resistant to fluid flow.

Abstract: A gas flooding process for displacing oil within a reservoir is improved by injections of a surfactant having a composition and concentration correlated with those of the brine used to remain substantially within the water phase of the injected fluid at a concentration below the critical micelle concentration of the surfactant.

Abstract: An improvement to a steam foam enhanced oil recovery process, whereby the time between injection of a surfactant and the resulting increase in steam injection pressure is reduced by initially injecting a rapidly-foaming surfactant, such as an internal olefin sulfonate, a vinylidene olefin sulfonate, or secondary alkane sulfonate, and subsequently injecting a typical steam foam surfactant that forms foam less rapidly.

Abstract: A process for enhancing the recovery of oil from a subterranean oil-containing reservoir having a temperature of at least about 40.degree. C., which comprises steps for(a) injecting into an injection well in the reservoir substantially liquid CO.sub.2 and an aqueous mixture containing between about 50 and 10,000 parts per million by weight, calculated on the weight of the water, of one or more surfactants of the formulaR--(OCH.sub.2 CH.sub.2).sub.x --Zwherein R represents an alkyl group of about 8 to 16 carbon atoms, x is an integer having an average value of about 5 to 20, and Z represents either a --OCOOM formate group or a --OCH.sub.2 COOM acetate group, with M representing a mono-valent inorganic cation, to displace oil from the reservoir, and(b) recovering the displaced oil from one or more recovery wells in the reservoir.The alcohol ethoxycarboxylate surfactants utilized in this process provide excellent control over the mobility of the CO.sub.

Abstract: A method of reducing the permeability of a subterranean formation comprising contacting the formation with an aqueous polymerizable composition comprising a polymerization monomer, a polymerization catalyst having a latent period, and an alcoholic compound selected from the group consisting of a cyclic ether containing a hydroxymethylene substituent on a carbon atom bonded to the ether oxygen, an aliphatic alcohol having a carbon-to-carbon double bond or a carbon-to-carbon triple bond, and mixtures thereof.

Abstract: A method of preventing or reducing the migration of fines in a permeable structure comprising contacting the fines with organic copolymers which can be either nonionic in a neutral media or can contain up to 95% by weight of a quaternary ammonium salt monomer.

Abstract: A method of stabilizing fines within a permeable earthen formation comprising contacting the fines with an effective amount of an organic copolymer. The organic polymer has a noncationic character in a liquid media having a pH of 7 or above and therefore can be utilized with other cationic or anionic chemicals without forming damaging percipitates or decomposing during its use.

Abstract: High density well drilling, completion and workover brines having low fluid loss to subterranean formations when in contact therewith are provided comprised of water, one or more inorganic salts, and an additive for reducing fluid loss. The additive is comprised of water soluble binary or ternary copolymers formed from vinyl monomers. Methods of use are also provided.

Abstract: A method of treating a permeable structure for the purpose of stabilizing fines in the structure using organic copolymers containing N-vinylpyrrolidone in the copolymer repeat unit.

Abstract: A method of treating a permeable structure for the purpose of stabilizing fines in the structure. The method is carried out by contacting the fines with an effective amount of nitrogen-containing cationic perfluorinated compounds.