685-63-2

Basic information

• Product Name: HEXAFLUORO-1,3-BUTADIENE
• Synonyms: HEXAFLUOROBUTA-1,3-DIENE;HEXAFLUOROBUTADIENE-1,3;HEXAFLUORBUTADIENE-1,3;HEXAFLUORO-1,3-BUTADIENE;1,1,2,3,4,4-Hexafluoro-1,3-butadiene;1,1,2,3,4,4-hexafluoro-3-butadiene;1,1,2,3,4,4-hexafluoro-buta-1,3-diene;1,1,2,3,4,4-hexafluorobuta-1,3-diene
• CAS NO: 685-63-2
• Molecular Formula: C₄F₆
• Molecular Weight: 162.03
• EINECS: 211-681-0
• Mol File: 685-63-2.mol
• Article Data: 47

Chemical Properties

• Melting Point: -132°C
• Boiling Point: 6-7°C
• Appearance: Colorless, odorless liquefied gas
• Density: 1.553
• Vapor Pressure: 954mmHg at 25°C
• Refractive Index: 1.378
• Water Solubility: 230.5mg/L at 20℃
• CAS DataBase Reference: HEXAFLUORO-1,3-BUTADIENE(CAS DataBase Reference)
• NIST Chemistry Reference: HEXAFLUORO-1,3-BUTADIENE(685-63-2)
• EPA Substance Registry System: HEXAFLUORO-1,3-BUTADIENE(685-63-2)

Safety Data

• Hazard Codes: F
• Statements: 11
• Safety Statements: 16-23-33
• RIDADR: 3161
• Hazardous Substances Data: 685-63-2(Hazardous Substances Data)

Usage

Flammability and Explosibility

Flammable

InChI:InChI=1/C4F6/c5-1(3(7)8)2(6)4(9)10

Upstream product

• 375-42-8 1,4-dibromo-2,3-dichloro-1,1,2,3,4,4-hexafluorobutane 
• 357-21-1 3,4-dichlorohexafluoro-1-butene 
• 376-42-1 3,4-dichloro-hexafluoro-adipic acid 
• 375-45-1 perfluoro-1,2,3,4-tetrachlorobutane 
• 375-27-9 1,2-dibromo-3,4-dichloro-1,1,2,3,4,4-hexafluoro-butane 
• 336-08-3 perfluoroadipic acid 
• 559-40-0 octaperfluorocyclopentene 
• 355-75-9 decafluorocyclohex-1-ene 
• 123-91-1 1,4-dioxane 
• 354-61-0 1,2-dichloro-1,2,2-trifluoro-1-iodoethane 
• 661-66-5 2,2-Dichlorotrifluoro-1-iodoethane 
• 811-97-2 1,1,1,2-tetrafluoroethane 
• 359-37-5 Iodotrifluoroethylene 
• 102682-87-1 trifluorovinyl copper 

Downstream Products

• 375-24-6 1,2,3,4-tetrabromo-hexafluoro-butane 
• 360-87-2 1,4-dibromohexafluoro-2-butene 
• 697-11-0 hexafluorocyclobut-1-ene 
• 98416-32-1 C₂₆H₁₄F₁₂O₂ 
• 148121-33-9 octadecafluoro<1-vinyl-2-(1-vinyl-2-cyclobutyl)cyclobutane> 
• 148978-76-1 1,2,3,3,4,4,5,6,6-Nonafluoro-5-(1,2,2,3,3,4-hexafluoro-4-trifluorovinyl-cyclobutyl)-cyclohexene 
• 380-40-5 hexafluoro-2,5-dihydrothiophene 
• 1588-28-9 hexafluorodithio-γ-butyrolactone 
• 1542-14-9 3,3,4,5,6,6-hexafluoro-3,6-dihydro-1,2-dithiin 
• 2377-85-7 1,2,3,3,4,4,5,6,7,7,8,8-dodecafluorotricyclo[3.3.0.0^2,6]octane 
• 692-50-2 hexafluoro-2-butyne 
• 1489-53-8 1,2,3-trifluorobenzene 
• 367-23-7 1,2,4-trifluorobenzene 
• 92818-42-3 1,2,2,5,6,6-hexafluorotricyclo<3.3.0.0^6,8>octane 

Relevant articles and documents

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METHOD FOR PRODUCING HEXAFLUORO-1,3-BUTADIENE

Provided is a method for producing hexafluoro-1,3-butadiene, and the method can produce hexafluoro-1,3-butadiene at an industrially sufficient level of yield. In a reaction liquid containing a halogenated butane represented by chemical formula, CF2X1—CFX2—CFX3—CF2X4 (X1, X2, X3, and X4 are each independently a halogen atom other than a fluorine atom), zinc, and an organic solvent, a reaction is conducted to eliminate the halogen atoms other than a fluorine atom, X1, X2, X3, and X4, from the halogenated butane, yielding hexafluoro-1,3-butadiene. During the reaction, the concentration of a zinc halide generated by the reaction, in the reaction liquid is not more than the solubility of the zinc halide in the organic solvent.

Preparation method of hexafluorobutadiene

The invention relates to a preparation method of hexafluorobutadiene, which comprises the following steps: respectively dehydrating a 3, 4-dichlorohexafluoro-1-butene raw material and an organic solvent, adding the dehydrated 3, 4-dichlorohexafluoro-1-butene raw material and the dehydrated organic solvent into a dechlorination reaction kettle together with zinc powder, carrying out a dechlorination reaction to obtain a dechlorination product, and carrying out rectification and catalytic conversion on the dechlorination product to obtain a hexafluorobutadiene product. Compared with the prior art, the method has the advantages that the by-product is rearranged into hexafluorobutadiene by using a catalyst, and rectification purification is combined, so that the purity of the obtained hexafluorobutadiene product is high, the content of impurities such as hexafluoro-2-butyne and hexafluorocyclobutene in the hexafluorobutadiene product is remarkably reduced, the difficulty of downstream production of high-purity hexafluorobutadiene can be reduced, and the purity requirement on 3, 4-dichlorohexafluoro-1-butene raw material is reduced from 99.95% to 99%, the requirement on the purity of the 3, 4-dichlorohexafluoro-1-butene raw material is reduced, the pressure of upstream production and investment is greatly reduced, and the height of a rectifying tower for producing the 3, 4-dichlorohexafluoro-1-butene can be greatly reduced.