Provided is a method of efficiently producing a solution composition containing a monoetherified product (III) using a hydroquinone compound (I) and a hydroxyl group-containing etherifying agent (II). The method of producing a solution composition includes: a step (1) of reacting a hydroquinone compound (I) and a hydroxyl group-containing etherifying agent (II) in a two-phase system including an alkaline aqueous solution and a hydrophobic ether solvent, and in the absence of a phase transfer catalyst and a hydrophilic organic solvent; and a step (2) of separating and removing an aqueous phase of a two-phase reaction liquid by liquid separation, and washing an organic phase using an aqueous solution containing a neutral inorganic salt and a hydroxide of an alkali metal, or the like.

There is disclosed an extraction process for recovering aminoalcohols and glycols from aqueous streams of taurine production. The aqueous streams which contain aminoalcohols and/or glycols are first mixed with a base to increase pH and then extracted with C.sub.3-C.sub.6 alcohols, ketones, and ethers. The aqueous streams are then returned to their respective cyclic process for the production of taurine.

There is disclosed an extraction process for recovering aminoalcohols and glycols from aqueous streams of taurine production. The aqueous streams which contain aminoalcohols and/or glycols are first mixed with a base to increase pH and then extracted with C.sub.3-C.sub.6 alcohols, ketones, and ethers. The aqueous streams are then returned to their respective cyclic process for the production of taurine.

There is disclosed an extraction process for recovering aminoalcohols and glycols from aqueous streams of taurine production. The aqueous streams which contain aminoalcohols and/or glycols are first mixed with a base to increase pH and then extracted with C.sub.3-C.sub.6 alcohols, ketones, and ethers. The aqueous streams are then returned to their respective cyclic process for the production of taurine.

This disclosure relates to a process for extracting a perfluoropolyether. The process involves: (a) contacting a solvent comprising a liquid or supercritical carbon dioxide with a lubricating grease comprising a thickener and the perfluoropolyether in an extraction zone to form an extraction solution comprising an extracted perfluoropolyether; and (b) recovering the extracted perfluoropolyether from the extraction solution; wherein the recovered extracted perfluoropolyether comprises no more than about 2 wt % of the thickener.

This disclosure relates to a process for extracting a perfluoropolyether. The process involves: (a) contacting a solvent comprising a liquid or supercritical carbon dioxide with a lubricating grease comprising a thickener and the perfluoropolyether in an extraction zone to form an extraction solution comprising an extracted perfluoropolyether; and (b) recovering the extracted perfluoropolyether from the extraction solution; wherein the recovered extracted perfluoropolyether comprises no more than about 2 wt % of the thickener.

This disclosure relates to a process for extracting a perfluoropolyether. The process involves: (a) contacting a solvent comprising a liquid or supercritical carbon dioxide with a lubricating grease comprising a thickener, an extraction aid material, and the perfluoropolyether in an extraction zone to form an extraction solution comprising an extracted perfluoropolyether; and (b) recovering the extracted perfluoropolyether from the extraction solution; wherein the recovered extracted perfluoropolyether comprises no more than about 2 wt % of the thickener.

This disclosure relates to a process for extracting a perfluoropolyether. The process involves: (a) contacting a solvent comprising a liquid or supercritical carbon dioxide with a lubricating grease comprising a thickener, an extraction aid material, and the perfluoropolyether in an extraction zone to form an extraction solution comprising an extracted perfluoropolyether; and (b) recovering the extracted perfluoropolyether from the extraction solution; wherein the recovered extracted perfluoropolyether comprises no more than about 2 wt % of the thickener.

A process for continuous preparation of halogenated alkoxyethane of general formula XCIHCCF.sub.2OR, where X is Cl or F and OR is C.sub.1-4 alkoxy, the process comprising a step of introducing in a plate reactor reaction components comprising (i) a compound of general formula XCIHCCYF.sub.2, where each of X and Y is independently Cl or F, (ii) a base, and (iii) a C.sub.1-4 alkanol, wherein (a) the plate reactor comprises a fluidic module defining one or more fluidic path(s) through which the reaction components flow as a reaction mixture, and (b) the halogenated alkoxyethane is formed at least upon the reaction components mixing, with the so formed halogenated alkoxyethane flowing out of the plate reactor in a reactor effluent, and (c) the base is one that forms a salt soluble in the alkanol during formation of the halogenated alkoxyethane.

A process for continuous preparation of halogenated alkoxyethane of general formula XCIHCCF.sub.2OR, where X is Cl or F and OR is C.sub.1-4 alkoxy, the process comprising a step of introducing in a plate reactor reaction components comprising (i) a compound of general formula XCIHCCYF.sub.2, where each of X and Y is independently Cl or F, (ii) a base, and (iii) a C.sub.1-4 alkanol, wherein (a) the plate reactor comprises a fluidic module defining one or more fluidic path(s) through which the reaction components flow as a reaction mixture, and (b) the halogenated alkoxyethane is formed at least upon the reaction components mixing, with the so formed halogenated alkoxyethane flowing out of the plate reactor in a reactor effluent, and (c) the base is one that forms a salt soluble in the alkanol during formation of the halogenated alkoxyethane.