摘要:
The present invention provides a novel compound represented as ##STR1## The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic compounds.
摘要:
Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkane with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkane with hydrogen to produce a fluorine-containing olefin. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkanes comprising copper metal deposited on a support, and comprising palladium deposited on calcium fluoride, poisoned with lead and reducing the in the presence or absence of a dehydrochlorination catalyst under conditions effective to form a product stream comprising cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336).
摘要:
The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof More particularly, the invention relates to open-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a sterically hindered amine catalyst.
摘要:
Disclosed are fluorinated diene alcohols perferably having a fluorine content of at least about 45 weight percent and having a plurality of moieties of the formula CFx and a plurality of moieties of the formula CHx, where each x is independently 1, 2 or 3 and where each CFx moiety is not directly bonded to another CFx moiety. Methods of synthesizing fluorinated diene alcohol compounds are also disclosed comprising reacting at least one C2-C3 alkene halide with at least one reactant of the formula (II): where Z is OH, OR6, OC(O)R7, or a halogen, R6 is a C1-C6 branched or straight chain alkyl, and R7 is a C1-C6 branched or straight chain alkyl or fluoroalkyl,
摘要翻译:公开的氟化二烯醇优选具有至少约45重量%的氟含量并且具有多个式CF x X的部分和多个式CH x x的部分, 其中每个x独立地为1,2或3,并且其中每个CF x X部分不直接键合到另一个CF x X部分。 还公开了合成氟化二烯醇化合物的方法,包括使至少一种C 2 -C 3 -C 3烯烃卤化物与至少一种式(II)的反应物反应:其中Z 是OH,OR 6,OC(O)R 7或卤素,R 6是C 1 H 12 C 6 -C 6支链或直链烷基,R 7是C 1 -C 6 -C 6支链或直链烷基, 直链烷基或氟烷基,
摘要:
A non-aqueous cleaning process uses an organic solvent for removing soil or surface contamination from contaminated articles such as printed circuit boards which are cleaned by immersion into a sump compartment of a cleaning tank containing the organic cleaning solvent. The organic solvent is preferably a hydrocarbon solvent. The cleaned articles, now coated with the organic cleaning solvent, are then disposed in a rinsing sump containing a fluorocarbon based rinsing solvent having an affinity for the organic cleaning solvent. The organic solvent is thus removed from the articles which are then dried without waste water as in a conventional solvent vapor degreasing solvent process.
摘要:
Hydrofluoroalkanes useful as solvents, especially for vapor degreasing and solvent cleaning, are one or many of the following formulae: CHF.sub.2 --X--(CHF).sub.n --X--Y wherein X is selected from the group consisting of CHF, CF.sub.2 and CH.sub.2, Y is CH.sub.3, and n is 0, 1 or 2.
摘要:
The present invention relates to a process for the reductive dechlorination of ClCF.sub.2 CFClCF.sub.2 Cl to CF.sub.3 CHFCH.sub.2 F comprising the step of contacting 1,2,3-trichloropentafluoropropane and H.sub.2 in the presence of a catalyst selected from the group consisting of palladium, platinum, ruthenium, rhodium, iridium and mixtures thereof supported on alumina under reaction conditions sufficient to produce a product stream containing 1,1,1,2,3-pentafluoropropane.
摘要:
Disclosed is a process for preparing cis-1,1,1,4,4,4-hexafluorobutene comprising the steps of (a) reacting CCl4 with a compound having the formula CF3CX═CXH, where each X is independently halogen or hydrogen, to form a compound having the formula CF3CXClCXHCCl3; (b) fluorinating the compound formed in step (a) to form a compound having the formula CF3CXHCXHCF3; (c) converting the compound formed in step (b) by a reaction selected from the group consisting of dehydrohalogenation, dehalogenation and both reactions, to form a compound having the formula CF3C≡CCF3; and (d) catalytically reducing the compound formed in step (c) with hydrogen to form the compound having the formula:
摘要翻译:公开了一种制备顺式-1,1,1,4,4,4-六氟丁烯的方法,包括以下步骤:(a)使CCl4与具有式CF 3 C X = C X H的化合物反应,其中每个X独立地为卤素或氢, 形成式CF3CXClCXHCCl3的化合物; (b)氟化步骤(a)中形成的化合物以形成具有式CF 3 C XHCXHCF 3的化合物; (c)通过选自脱卤化氢,脱卤和两种反应的反应转化步骤(b)中形成的化合物,以形成具有式CF 3C≡CCF3的化合物; 和(d)用氢气将步骤(c)中形成的化合物催化还原以形成具有下式的化合物:
摘要:
The present invention provides a novel compound represented as ##STR1## The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic compounds.
摘要:
Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkane with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkane with hydrogen to produce a fluorine-containing olefin. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkanes comprising copper metal deposited on a support, and comprising palladium deposited on calcium fluoride, poisoned with lead and reducing the in the presence or absence of a dehydrochlorination catalyst under conditions effective to form a product stream comprising cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336).