摘要:
Disclosed are compositions useful in a wide variety of applications, including heat transfer fluids which possess a highly desirable and unexpectedly superior combination of properties, and heat transfer systems and methods based on these fluids. The preferred heat transfer fluid comprises from about 1 to about 40 percent, on a weight basis, of carbon dioxide (CO2) and from about 99 to about 60 percent, on a weight basis, of a compound having the Formula I XCFzR3-z (I), where X is a C2 or a C3 unsaturated, substituted or unsubstituted, alkyl radical, each R is independently Cl, F, Br, I or H, and z is 1 to 3. A preferred compound of Formula I is tetrafluoropropene, particularly 1,1,1,3-tetrafluoropropene and/or 1,1,1,3-tetrafluoropropene.
摘要翻译:公开了可用于各种应用的组合物,包括具有非常理想和意想不到的优异组合的传热流体,以及基于这些流体的传热系统和方法。 优选的传热流体包含以重量为基准的约1至约40重量%的二氧化碳(CO 2)和约99至约60重量%的具有式I XCF z R 3-z( I),其中X是C2或C3不饱和的取代或未取代的烷基,每个R独立地是Cl,F,Br,I或H,z是1至3.优选的式I化合物是四氟丙烯, 特别是1,1,1,3-四氟丙烯和/或1,1,1,3-四氟丙烯。
摘要:
An azeotrope-like composition consisting essentially of 1,1,1,2,3-pentachloropropane and hydrogen fluoride is provided, as well as methods that involve such an azeotrope-like composition.
摘要:
Provided are azeotropic and azeotrope-like compositions of 2,3-dichloro-3,3-difluoropropene (HCFO-1232xf) and hydrogen fluoride (HF). Such azeotropic and azeotrope-like compositions are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).
摘要:
The invention provides a method for separating halocarbons. In particular, a method for separating 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) from 2-chloro-3,3,3-trifluoropropene (HCFC-1233xf) by adding a third component and then separating via conventional distillation. More particularly the invention pertains to a method for separating HCFC-244bb from HCFC-1233xf which are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).
摘要:
A composition including an effective amount of trans-1,3,3,3-tetrafluoropropene component combined with an effective amount of an alcohol selected from the group of methanol, ethanol, propanol, isopropanol, tert-butanol, isobutanol, 2-ethyl hexanol and any combination thereof, where the composition has azeotropic properties.
摘要:
The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
摘要:
The present invention provides compositions comprising pentafluoropropane, a second component selected from the group consisting of decafluoropropane, perfluorobutyl methyl ether and combinations of these, and a third component selected from the group consisting of methanol, 1,2-trans-dichloroethylene and combinations of these. The present invention further provides for refrigerants, blowing agents, foam compositions, polyol premixes, closed-cell foams, sprayable compositions, and the like, comprising the present compositions.
摘要:
Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluorobutane, water and a hydrocarbon selected from the group consisting of n-pentane, isopentane, cyclopentane, n-hexane, and isohexane., said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
摘要:
Disclosed are azeotrope-like compositions comprising 1,1,1,3,3-pentafluoropropane and at least one C3 or C4 hydrocarbon, and optionally water, said compositions are environmentally desirable for use as refrigerants, aerosol propellants, metered dose inhalers, blowing agents for polymer foam, heat transfer media, and gaseous dielectrics.
摘要:
An azeotrope-like mixture consisting essentially of a binary azeotrope-like mixture consisting essentially of trans-1-chloro-3,3,3-trifluoropropene (trans-HFO-1233zd) and a second component selected from the group consisting of 2,3,3,3-tetrafluoropropene (HFO-1234yf) and trans-1,3,3,3-tetrafluoropropene (trans-HFO-1234ze), and combinations of these and various uses thereof.