This disclosure relates to a vapor recovery system particularly adapted to recover volatile liquid vapors from a tank during the filling of a tank with the volatile liquid. The disclosure particularly relates to the operation of the vapor recovery system, particularly the absorber system thereof, at a low temperature whereby maximum efficiency can be obtained with low pressures. The absorber system is also improved by recirculating the absorbing liquid to minimize air absorption in the liquid st...

Ethylene amines are manufactured by a process wherein ethylene dichloride is reacted with ammonia and the mixture is stripped of unreacted ammonia. Sodium hydroxide equivalent to the chloride present is added and large quantities of sodium chloride result. Part of the ethylene amines product is lost when this salt is separated from the product amines. Recovery of the ethylene amines from the salt and production of a substantially amine-free salt is accomplished by the disclosed process involving...

Rhenium is recovered from solution by adsorption on activated carbon, followed by elution with a water-soluble alcohol or an alcohol-water mixture.

Disclosed is a method for recovering terpenes from a wet, gaseous stream containing terpene vapor and water vapor by condensing water from the stream by indirect heat exchange to produce an aqueous liquid terpene-lean condensate phase while leaving a first terpene-rich vapor phase. The aqueous terpene-lean condensate is disengaged from said vapor phase, subcooled and used as the indirect heat exchange medium at boiling for condensing additional terpene-lean condensate from the wet, gaseous strea...

Equipment and methods for recovering silver from a silver-containing solution. The equipment comprises a plastic container and rotatable spaced T-connectors comprising an influent liquid passage and an effluent liquid passage. A transparent U-shaped tube with an elevated aperture therein spans between the two T-connectors. The influent and effluent liquid passes through fittings in a lid which fittings are externally sealed adjacent respective openings in the lid. The circumference of the lid co...

Improvements in recovery operations for the recovery of hydrocarbons from subterranean formations are accomplished through the use of aqueous mediums comprising aqueous gels prepared in situ from water and cellulose ethers.

The alcohol, ether and hydrocarbon components of the reaction effluent from various etherifications of C.sub.4 or C.sub.5 isoolefins with an alcohol such as methanol or ethanol which produce MTBE, ETBE, TAME, or TAEE are separated using identical process equipment. The components are recovered by first removing a portion of the alcohol in a first water extraction step, then fractionating the ether, followed by the removal of additional alcohol in a second water extraction step and then fractiona...

A process for recovery of molybdenum from residual fractions derived from an epoxidation reaction of propylene with tertiary butyl hydroperoxide in liquid phase with tertiary butyl alcohol, in the presence of soluble molybdenum, which process comprises: Fractionating epoxidation reaction product for obtaining a liquid fraction containing essentially all molybdenum from the reaction product; Contacting the liquid fraction with anhydrous ammonia for forming a precipitate containing the major porti...

Optical clock recovery is performed on an optical signal containing both data and clock information by applying it to a photodetector and adding part of the resulting electrical signal to the bias of a self-pulsating laser diode so as to force its pulsation frequency to the frequency and phase of the clock component of the optical signal.

A process for the recovery of drilling fluid additives, including industrial carbon, calcium carbonate, natural and synthetic fibers, and other materials from a mixture. The mixture may include drilling fluids, drilled solids, and drilling fluid additives from a mud system. The process may include: separating at least a portion of the drilled solids from the mixture to form a first effluent and a drilled solids fraction; separating at least a portion of the drilling fluid additives from the firs...