754-12-1

Usage

Flammability and Explosibility

Flammable

Upstream product

• 367-57-7 1,1,1-Trifluoro-2,4-pentanedione 
• 400-54-4 propionyltrifluoroacetone 
• 812-30-6 1,1,2-trichloro-1,2,3,3,3-pentafluoropropane 
• 116-14-3 polytetrafluoroethylene 
• 593-53-3 Methyl fluoride 
• 421-73-8 2-chloro-1,1,1,2-tetrafluoropropane 
• 422-01-5 3-bromo-1,1,1,2,2-pentafluoropropane 
• 2730-62-3 2-chloro-1,1,1-trifluoropropene 
• 74-87-3 methylene chloride 
• 115-25-3 Octafluorocyclobutane 
• 34557-54-5 methane 
• 75-45-6 Chlorodifluoromethane 
• 64240-29-5 1,1,1,2,2-pentachloropropane 
• 23153-23-3 1,1,1,3,3-pentachloropropane 

Downstream Products

• 50-00-0 formaldehyd 
• 354-34-7 trifluoroacetyl fluoride 
• 2565-30-2 formyl chloride 
• 201230-82-2 carbon monoxide 
• 1226600-23-2 (Z)-1-chloro-4-(2,3,3,3-tetrafluoroprop-1-en-1-yl)benzene 
• 1226600-36-7 (Z)-1-methoxy-4-(2,3,3,3-tetrafluoroprop-1-en-1-yl)benzene 
• 1226600-29-8 (Z)-1-ethyl-4-(2,3,3,3-tetrafluoroprop-1-en-1-yl)benzene 
• 1226600-39-0 (Z)-1-(2,3,3,3-tetrafluoroprop-1-en-1-yl)-4-(trifluoromethyl)benzene 
• 1038923-60-2 (Z)-1-methyl-4-(2,3,3,3-tetrafluoroprop-1-en-1-yl)benzene 

Relevant academic research and scientific papers

Method for preparing 3, 3, 3-trifluoropropyne through gas-phase dehydrohalogenation

The invention discloses a method for preparing 3, 3, 3-trifluoropropyne through gas-phase dehydrohalogenation. The method comprises the following steps: taking 1-halogen-3, 3, 3-trifluoropropene or/and 2-halogen-3, 3, 3-trifluoropropene (halogen = F or Cl or Br or I) as a raw material, and carrying out gas-phase dehydrohalogenation reaction in the presence of a catalyst to obtain the 3, 3, 3-trifluoropropyne. The method disclosed by the invention is mainly used for producing the 3, 3, 3-trifluoropropyne in a gas-phase continuous circulation manner at a high conversion rate and high selectivity.

Activation of pentafluoropropane isomers at a nanoscopic aluminum chlorofluoride: Hydrodefluorination versus dehydrofluorination

The hydrofluorocarbon 245 isomers, 1,1,1,3,3-pentafluoropropane, 1,1,1,2,2- pentafluoropropane, and 1,1,1,2,3-pentafluoro-propane (HFC-245fa, HFC-245cb, and HFC-245eb) were activated through C-F bond activations using aluminium chlorofluoride (ACF) as a catalyst. The addition of the hydrogen source Et3SiH is necessary for the activation of the secondary and tertiary C-F bonds. Multiple C-F bond activations such as hydrodefluorinations and dehydrofluorinations were observed, followed by hydroarylation and Friedel-Crafts-type reactions under mild conditions.

PROCESS FOR THE PRODUCTION OF 2,3,3,3-TETRAFLUOROPROPENE

The present invention relates to a process for the production of 2,3,3,3-tetrafluoropropene comprising the stages: i) in a first reactor, bringing 2-chloro-3,3,3-trifluoropropene into contact with hydrofluoric acid in the gas phase in the presence of a catalyst, in order to produce a stream A comprising 2,3,3,3-tetrafluoropropene, HF and unreacted 2-chloro-3,3,3-trifluoropropene; and ii) in a second reactor, bringing hydrofluoric acid into contact, in the gas phase in the presence or absence of a catalyst, with at least one chlorinated compound selected from the group consisting of 1,1,1,2,3-pentachloropropane, 2,3-dichloro-1,1,1-trifluoropropane, 2,3,3,3-tetrachloropropene and 1,1,2,3-tetrachloropropene, in order to produce a stream B comprising 2-chloro-3,3,3-trifluoropropene, characterized in that the stream A obtained in stage i) feeds said second reactor used for stage ii); and in that the pressure at the inlet of said first reactor of stage i) is greater than the pressure at the inlet of said second reactor of stage ii).

Selective Copper Complex-Catalyzed Hydrodefluorination of Fluoroalkenes and Allyl Fluorides: A Tale of Two Mechanisms

The transition to more economically friendly small-chain fluorinated groups is leading to a resurgence in the synthesis and reactivity of fluoroalkenes. One versatile method to obtain a variety of commercially relevant hydrofluoroalkenes involves the catalytic hydrodefluorination (HDF) of fluoroalkenes using silanes. In this work it is shown that copper hydride complexes of tertiary phosphorus ligands (L) can be tuned to achieve selective multiple HDF of fluoroalkenes. In one example, HDF of the hexafluoropropene dimer affords a single isomer of heptafluoro-2-methylpentene in which five fluorines have been selectively replaced with hydrogens. DFT computational studies suggest a distinct HDF mechanisms for L2CuH (bidentate or bulky monodentate phosphines) and L3CuH (small cone angle monodentate phosphines) catalysts, allowing for stereocontrol of the HDF of trifluoroethylene.

Co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene

The invention discloses a co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The co-production method of the trans-1-chlorine-3,3,3-trifluoropropene and the 2,3,3,3-tetrafluoropropene comprises the following steps: mixing 1,1,1,3,3-pentachloropropane and 1,1,1,2,3-pentachloropropane according to proportion, introducing the mixture and hydrogen fluorideinto a first reactor, performing fluorination reaction under the action of a catalyst A to obtain trans-1-chlorine-3,3,3-trifluoropropene, cis-1-chlorine-3,3,3-trifluoropropene, 2-chlorine-3,3,3-trifluoropropene, hydrogen chloride and hydrogen fluoride, not separating the products and directly entering a second reactor, performing reaction under the action of a catalyst B to obtain a mixture of trans-1-chlorine-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene, hydrogen chloride and hydrogen fluoride, and performing separation to obtain the products, namely trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The co-production method adopts a cascade reaction mode, and is efficient, energy-saving and simple in process.

METHOD FOR PRODUCING AND PURIFYING 2,3,3,3-TETRAFLUOROPROPENE

The invention relates to a process for producing 2,3,3,3-tetrafluoropropene performed using a starting composition, comprising the steps of placing the starting composition in contact with HF, in the presence of a catalyst, to produce a composition A comprising 2,3,3,3-tetrafluoropropene (1234yf), intermediate products B consisting of 2-chloro-3,3,3-trifluoropropene (1233xf), 1,1,1,2,2-pentafluoropropane (245cb), and side products C consisting of E-1-chloro-3,3,3-trifluoro-1-propene (1233zdE), trans-1,3,3,3-tetrafluoro-1-propene (1234zeE) and 1,1,1,3,3-pentafluoropropane (245fa); recovery of said composition A and purification thereof to form and recover a first stream comprising 2,3,3,3-tetrafluoropropene (1234yf) and one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb); recycling into step a) of said one or more streams comprising 2-chloro-3,3,3-trifluoropropene (1233xf) and/or 1,1,1,2,2-pentafluoropropane (245cb).

PROCESS FOR PRODUCING A FLUORINATED ALKENE

The invention refers to a process for producing a fluorinated alkene, in particular X1n—CFmCF═CH2 comprising the steps of a) providing a at least one fluorinated alkene of the general formula (I) X1n—CFmCF═CF2, wherein n is 0, 1, 2, 3; X1 is H, substituted or unsubstituted C1-C5 alkyl, m is 1, 2 or 3, preferably 2 or 3, in at least one donor solvent; b) adding at least one reducing agent selected from the group of organic aluminum hydrides (alanes), gallium hydrides (gallanes) or boron hydrides (boranes); and c) reacting the mixture of the fluorinated alkene according to formula (I) and the at least one reducing agent.

Gallium Hydrides and O/N-Donors as Tunable Systems in C?F Bond Activation

The gallium hydrides (iBu)2GaH (1 a), LiGaH4 (1 b) and Me3N?GaH3 (1 c) hydrodefluorinate vinylic and aromatic C?F bonds when O and N donor molecules are present. 1 b exhibits the highest reactivity. Quantitative conversion to the hydrodefluorination (HDF) products could be observed for hexafluoropropene and 1,1,3,3,3-pentafluoropropene, 94 % conversion of pentafluoropyridine and 49 % of octafluorotoluene. Whereas for the HDF with 1 b high conversions are observed when catalytic amounts of O donor molecules are added, for 1 a, the addition of N donor molecules lead to higher conversions. The E/Z selectivity of the HDF of 1,1,3,3,3-pentafluoropropene is donor-dependent. DFT studies show that HDF proceeds in this case via the gallium hydride dimer–donor species and a hydrometallation/elimination sequence. Selectivities are sensitive to the choice of donor, as the right donor can lead to an on/off switching during catalysis, that is, the hydrometallation step is accelerated by the presence of a donor, but the donor dissociates prior to elimination, allowing the inherently more selective donorless gallium systems to determine the selectivity.

Co-production method of 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene

The invention discloses a co-production method of 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. A mixture of 1,1,1,2,2-pentachloropropane and 1,1,1,3,3-pentachloropropane and anhydrous hydrogen fluoride are preheated and then are introduced into a first reactor, reaction is performed under the effect of a La2O3-Cr2O3 catalyst to obtain a first reactor product; the first reactor product is directly introduced into a second reactor without separation, and catalytic fluorination reaction is performed under the effect of a Ga2O3-Y2O3-Cr2O3 catalyst to obtain a second reactorreaction product; the second reactor reaction product is separated, and then the products 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene are obtained. The co-production method has the advantages that the process is simple, device investment is small, the activity of the catalysts is good, the selectivity is high, the total service life is long, the proportions of the two products can be flexibly adjusted according to the market demands, and the like.