摘要:
A continuous process for the production of dichlorohydrin by the reaction of allyl chloride, water and chlorine having substantially lower energy requirements than conventional processes, wherein the reaction mixture is subjected to reverse osmosis to concentrate the dichlorohydrin and to provide a permeate stream substantially free of dichlorohydrin, which permeate stream is recycled to the reaction.
摘要:
In a multistage reaction system for the preparation of dichlorohydrin by the reaction of allyl chloride, water and chlorine and where the hydrochloric acid by-product is removed by electrodialysis, increased efficiency for acid removal by electrodialysis results from at least partial neutralization of the acid in the electrodialysis concentrate receiving stream, enabling the use of smaller electrodialysis membrane area and or lower energy consumption.
摘要:
A continuous process for the production of dichlorohydrin by the reaction of allyl chloride, water and chlorine enabling several options for improving yields, lowering operating costs and having reduced effluent treating requirements which multi-stage reaction zone process employs electrodialysis and post reaction reverse osmosis, with integrated recycled streams therebetween.
摘要:
A continuous process for the production of dichlorohydrin by the reaction of chlorine, water and allyl chloride, having reduced water consumption wherein the dichlorohydrin formed is extracted into an inert organic solvent and the remaining aqueous reaction product is electrodialyzed, and at least a portion of the resulting diluate is recycled to the reaction.
摘要:
Polyethercyclicpolyols are prepared by thermally condensing a polyol having at least three hydroxyl groups of which at least two of the hydroxyl groups are vicinal, precursors of the polyol, cyclic derivatives of the polyol, or mixtures thereof, and controlling process conditions to avoid substantial undesirable degeneration. Lower molecular weight polyethercyclicpolyols are copolymerized with epoxy resins to form higher molecular weight polyethercyclicpolyols.
摘要:
An invert oil emulsion drilling fluid containing oil, an emulsifier such as a fatty acid soap, clay or polymer, and an alcohol such as glycerol or cyclicetherpolyol as the internal phase of the emulsion. A method using substantially water-free drilling fluid and monitoring the influx of formation water into the drilling fluid.
摘要:
Coal can be freed of ion-exchangeable sodium by contacting it with aqueous solutions of CO.sub.2 or formic or acetic acids at a mine mouth or contacting it with aqueous CO.sub.2 while transporting it in a pipeline.
摘要:
A continuous process for the production of dichlorohydrin by the reaction of chlorine, water and allyl chloride, having reduced water consumption wherein the dichlorohydrin formed is extracted into an inert organic solvent and the remaining aqueous reaction product is subjected to reverse osmosis, and at least a portion of the resulting permeate is recycled to the reaction.
摘要:
A process for recovery of glycerine from saline waters-containing glycerine comprises evaporating the water to precipitate a major amount of any salts present, separating the liquid phase and diluting it with water to low viscosity, electrodialysing the diluted liquid phase to obtain, (1) a concentrate stream which is recycled to the evaporative step, and (2) a diluate stream which is subjected to fractionation distillation to obtain glycerine as an overhead fraction.