Method and apparatus for transforming chemical fluids using halogen or oxygen in a photo-treatment process
申请人:Tarancon Gregorio
公开号:US20050087434A1
公开(公告)日:2005-04-28
A method of treatment of reactant fluids such as hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), hydrochlorocarbons (HCCs), and hydrocarbons (HCs) for the production of new chemical fluids. Another method of treatment for the transformation of the reactant fluids having impurities present in the chlorofluorocarbons (CFCs) or fluorocarbons (FCs) for yielding a high quality chemical product. Reactant fluids with impurities present in used CFC or FC may form an azeotropic mixture. A photochemical reaction is used wherein the reactant fluids are molecules with hydrogen atoms in a hydrogen-carbon bond. The process is comprised of the following steps: placing the reactant fluids into a process compartment of the photochemical reactor; placing halogen fluid or oxygen fluid into the process compartment of the photochemical reactor, wherein the halogen fluid is selected from a group consisting of chlorine (Cl
2
), bromine (Br
2
) and iodine (I
2
); and irradiating the fluids and the halogen or oxygen fluid using radiant energy from lamps operating in the visible and ultraviolet light regions of the electromagnetic spectrum to conduct thermolysis, photolysis and photochemical treatment by halogenating or oxidizing the molecules of the reactant fluids with the halogen or oxygen fluids to form halogenated or oxidized fluids during a dwell time period.
Free radical chemistry. Part 5. [1] A new approach to the synthesis of perfluorinated ethers
作者:Richard D. Chambers、Brian Grievson、Frederick G. Drakesmith、Richard L. Powell
DOI:10.1016/s0022-1139(00)82331-3
日期:1985.9
Fluorinations of the free-radical adducts of fluorinated alkenes, to ethers, overcobalttrifluoride are described and perfluorinated ethers are obtained at temperatures in excess of 400°C. The effect of structure on the formation of perfluoroethers is outlined.
Free-radical chemistry. Part 8[1]. Electrochemical fluorination of partly fluorinated ethers
作者:Richard D. Chambers、Robert W. Fuss、Michael Jones、Peter Sartori、Alan P. Swales、Ralf Herkelmann
DOI:10.1016/s0022-1139(00)85035-6
日期:1990.9
Free-radical additions of hexafluoropropene to cyclic ethers may be carried out to achieve mono- or di-adducts and mixtures of isomers of di-adducts are formed. These adducts may be fluorinated, using electrochemical fluorination, to give the corresponding perfluoro-ethers and, in some cases, with surprising efficiency. Adducts of acyclic ethers are less efficiently fluorinated.
Thermal preactivation of gaseous precursor filled compositions
申请人:IMARX PHARMACEUTICAL CORP.
公开号:EP0901793A1
公开(公告)日:1999-03-17
The present invention describes, among other things, the surprising discovery that gaseous precursor filled compositions are profoundly more effective as acoustically active contrast agents when they are thermally preactivated to temperatures at or above the boiling point of the instilled gaseous precursor prior to their in vivo administration to a patient. Further optimization of contrast enhancement is achieved by administering the gaseous precursor filled compositions to a patient as an infusion. Enhanced effectiveness is also achieved for ultrasound mediated targeting and drug delivery.
PROCESSES FOR THE RECOVERY AND RECYCLING OF BORON TRIFLUORIDE OR COMPLEXES THEREOF
申请人:Idemitsu Kosan Co., Ltd.
公开号:EP1557221A1
公开(公告)日:2005-07-27
The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydro fluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.
本发明提供的催化剂回收工艺适用于以三氟化硼或其络合物为催化剂的反应,即 (I) 一种催化剂回收工艺,包括使用含有氢氟碳化合物和/或含氧氢氟碳化合物的溶剂作为反应溶剂,并在反应完成后将反应溶剂从反应混合物中分离出来;以及 (II) 一种催化剂回收工艺,包括在反应完成后使用氢氟碳化合物和/或含氧氢氟碳化合物从反应混合物中提取三氟化硼或其络合物;(II) 一种催化剂回收工艺,该工艺包括在反应完成后,使用氢氟碳化合物和/或含 氧氢氟碳化合物作为萃取溶剂,从反应混合物中萃取三氟化硼或其络合物。根据这些工艺,用作催化剂的三氟化硼或其络合物可以很容易地从反应混合物中分离出来并重复使用。