Abstract: The methods apparatuses described herein involve recovering of glycol from an aqueous phase to form a stream of recovered glycol and a glycol recovery system. The aqueous phase is fed to the top of a lower theoretical stage in a distillation column. An overhead vapor stream is drawn from the distillation column overhead of an upper theoretical stage, and a bottom stream comprising a stream of regenerated glycol is drawn from the distillation column via a bottom outlet configured below the lower theoretical stage. The stream of recovered glycol comprises the regenerated glycol. In addition, a first middle theoretical stage is situated within the distillation column gravitationally above the lower theoretical stage and below the upper theoretical stage. A side stream of liquid water is drawn from the bottom of the upper theoretical stage in the distillation column.

Abstract: Capturing a target gas includes contacting a gas mixture including a target species with an aqueous solution including a buffer species, and transferring some of the target species from the gas mixture to the aqueous solution. The target species forms a dissolved target species in the aqueous solution, and the aqueous solution is processed to yield a first aqueous stream and a second aqueous stream, where the equilibrium partial pressure of the target species over the second aqueous stream exceeds the equilibrium partial pressure of the target species over the first aqueous stream. At least some of the dissolved target species in the second aqueous stream is converted to the target species, and the target species is liberated from the second aqueous stream. The target species can be collected and/or compressed for subsequent processing or use.

Abstract: A system and process are disclosed for selective removal and recovery of H2S from a gaseous volume, e.g., from natural gas. Anhydrous organic, sorbents chemically capture H2S gas to form hydrosulfide salts. Regeneration of the capture solvent involves addition of an anti-solvent that releases the captured H2S gas from the capture sorbent. The capture sorbent and anti-solvent are reactivated for reuse, e.g., by simple distillation.

Abstract: Process for the dehydration of gases, comprising: absorbing water vapor by means of a hygroscopic liquid consisting essentially of one or more C2-C8 glycols and an additive capable of forming a minimum type azeotrope with water; distilling the glycol/water/additive mixture to obtain a top product consisting mainly of the water/additive azeotropic mixture and a bottom product consisting mainly of glycol and additive (hygroscopic liquid); recycling the regenerated hygroscopic liquid to the absorption stage.

Abstract: The invention provides a process and an apparatus for scrubbing vapours generated during the vacuum stripping step of fatty glycerides, said process comprising bringing said vapours in contact with their liquid condensate and extracting said liquid condensate with a polar extraction solvent or solvent mixture.

Abstract: Process for the dehydration of gases, comprising: absorbing water vapour by means of a hygroscopic liquid consisting essentially of one or more C2-C8 glycols and an additive capable of forming a minimum type azeotrope with water; distilling the glycol/water/additive mixture to obtain a top product consisting mainly of the water/additive azeotropic mixture and a bottom product consisting mainly of glycol and additive (hygroscopic liquid); recycling the regenerated hygroscopic liquid to the absorption stage.

Abstract: Provided are azeotrope-like compositions comprising iodine heptafluoride and hydrogen fluoride and uses thereof, including methods for separating iodine heptafluoride or hydrogen fluoride from a mixture comprising iodine heptafluoride and hydrogen fluoride by removing an azeotrope-like composition of the present invention therefrom.

Abstract: A method for removing acidic gases from waste gases is disclosed. The invention relates to a method for removing acid gases, in particular from SO2 and NOx, by contacting the waste gas with an emulsion of water in organic sulfoxides, in particular of water in oil-derived-sulfoxides. The organic sulfoxide phase can be regenerated after the emulsion is loaded with polluants, by letting the emulsion to settle down and separate into two phases. The aqueous phase obtained after the separation contains sulfate and nitrate ions which can be collected and used as valuable chemicals.

Abstract: An exhaust gas recovery method and apparatus including: a first process in which volatile organic compound gas in exhaust gas from a exhaust gas discharging source is absorbed into water by a scrubber; a second process in which water including the volatile organic compound, which is obtained in the first process, is frozen and the volatile organic compound herein concentrated such that the water including the volatile organic compound is separated into water including a high concentration of the volatile organic compound, level of concentration being higher than that of the water including the volatile organic compound which is obtained in the first process, and ice; a third process in which cold of the ice obtained in the second process is used; and a fourth process in which the water including a high concentration of the volatile organic compound, which is obtained in the second process, is reused, is provided.

Abstract: Described is a process for preparing beclomethsaone dipropionate Freon® clathrate comprising the use of an agent which selectively binds methanol to selectively remove methanol from a mixture of methanol and Freon® 11 containing beclomethasone dipropionate.

Abstract: A process is provided for removing CO2 and/or H2S from a gas mixture containing as impurities CO2 and/or H2S and at least one other impurity selected from the group consisting of a cyanide and ammonia. The process includes contacting at least a portion of the reflux stream from the overhead vapor from a stripping column of an acid gas removal solvent (i.e., alkanolamine) treatment plant with an anion exchange resin to remove corrosive impurities. The ion-exchanged reflux stream is then recycled to the top of the stripping column or into the bulk circulating acid gas removal solvent (i.e., alkanolamine) passing from the bottom of the stripping column.

Abstract: A wet gas compression device combining the following stages: a separation stage providing a gas phase and a liquid phase; a conversion stage for converting a gas phrase and a liquid phase; a conversion stage for converting the liquid phase provided by the separation stage to a vapor phase by heat exchange; a compression stage for compressing the gases from the separation stage and the conversion stage and for providing a portion of gas for use in the heat exchange of the compression stage.

Abstract: A process for the reclamation of spent aqueous alkanolamine solutions by contacting a spent aqueous alkanolamine solution with a strong base ion exchange resin for time sufficient to sorb from the aqueous alkanolamine solution at least a portion of the accumulated ions and after a high concentration of ions accumulate on the resin, regenerating the strong base ion exchange resin by: a) purging the resin with water or nitrogen, b) contacting the strong base ion exchange resin with a sodium chloride solution for a time sufficient to remove the ions, c) purging the resin to remove the sodium chloride solution, d) contacting the resin with an alkali metal hydroxide solution, preferably sodium hydroxide, for a time sufficient to convert the resin to a substantially hydroxide form; and e) purging the resin, wherein the ion sorption capacity of the resin is maintained at a substantially constant value.

Abstract: When a vapor-phase mixture is brought in contact with a liquid absorbent kept at a temperature above the condensation temperature of the vapor-phase mixture, the vapor-phase mixture becomes concentrated for those components which are absorbed by the absorbent in small or negligible amounts. In the method according to the invention, the regeneration of the absorbent essentially utilizes the heat of absorption of the absorbed components. The actual absorption process can be isothermal or adiabatic or a combination of these. The method is particularly suited to the separation of vapor-phase mixtures of minimum boiling point azeotropes.

Abstract: A process for treating spent aqueous emulsion material formed from a non-volatile hydrocarbon organic portion having a paint solids content greater than about 10% by weight in which the spent emulsion is broken and the organic phase is admixed with sufficient amounts of a hydrocarbon solvent extractant to extract organic portions of the aqueous emulsion. The hydrocarbon solvent extractant and the organic portion/solvent extractant mixture can then be distilled to provide essentially pure hydrocarbon solvent extractant and the hydrocarbon organic portion of the emulsion essentially free from paint solids. The organic portion of the material can then be admixed with quantities of water to reform a reclaimed emulsion. Examples of the paint overspray treatment emulsion on which the process of the present invention is highly effective is one which contains a hydrocarbon such as an alcohol ester, an alcohol ester derivative or mixtures of the two in combination in its organic phase.