摘要:
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.
摘要:
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.
摘要:
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.
摘要:
Methods of preparing viscous aqueous polymer solutions having improved viscosity and stability properties for use in the treatment of subterranean hydrocarbon-containing formations and in enhanced oil recovery processes are provided. Methods and systems for enhancing the recovery of oil from subterranean oil-containing formations are also provided. The viscous aqueous polymer solutions of the invention are prepared by polymerizing one or more water soluble polymerizable vinyl monomers in a substantially oxygen-free aqueous solvent and then further diluting the resultant concentrated solution in additional solvent. Such viscous aqueous polymer solutions have improved viscosity properties and increased compatibility with oil well treating fluid additives, especially clay stabilizers.
摘要:
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.
摘要:
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.
摘要:
A method of treating an earthen formation containing swelling clays or migrating fines or combinations thereof to reduce the loss of permeability in said formation. The method is carried out by contacting the swelling clays or fines with an effective amount of an organic polycationic polymer which contains three quaternary ammonium moieties in the monomer repeat unit.
摘要:
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.
摘要:
A method of stabilizing fines within a permeable subterranean formation comprising contacting the fines with an effective amount of an organic polycationic polymer which contain two quaternary ammonium moieties in the polymer repeating unit.
摘要:
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.