ChemicalBook CAS DataBase List 1,1-DIFLUOROETHYLENE

1,1-DIFLUOROETHYLENE synthesis

7synthesis methods

Product Name:1,1-DIFLUOROETHYLENE
CAS Number:75-38-7
Molecular formula:C2H2F2
Molecular Weight:64.03

2837-89-0
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811-97-2
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$45.00/25 g

75-38-7
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$225.00/100 g

359-11-5 Synthesis

359-11-5
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Yield:-

Reaction Conditions:

in water at 350 - 820; under 300.03 Torr; for 8.33333E-05 h;Autoclave;

Steps:

2
The preheater 2a of stainless steel tubing in an electric furnace in the set at a temperature 350 ° C. oven, introducing HCFC-124 continuously, and heated to HCFC-124 to 350 ° C.. The furnace temperature 750 ° C. is heated by the heating steam generator 3a is an electrical furnace set at the water (water vapor) was supplied to the internal pressure (gauge pressure) reactors managed in an internal temperature of 770 ° C. at 0.04 MPa. Moreover, the HCFC-124 which is adjusted to the temperature being preheated, feed rate of water vapor to the total gas feed rate (water vapor / (HCFC-124 + water vapor)) was fed to the reactor so as to become 93 mol% . As the residence time of the mixed gas in the reactor (HCFC-124 and water vapor) is 0.31 seconds, by controlling the flow rate of the mixed gas (supply amount per unit time), the gas in the reaction mixture reactor It was taken out from the outlet. Measured value of the reactor temperature was 770 ° C., measured value of the reactor pressure was 0.04 MPa. Note that the gas in the reaction mixture taken out from the outlet of the reactor, in addition to generating or-product gas by the reaction, HCFC-124 and steam unreacted also included. Then, the gas in the reaction mixture taken out from the outlet of the reactor, and cooled below 100 , after dehydration treatment after performing collection and alkali cleaning of steam and acidic solution in order, the exit gas obtained with gas chromatography and analyzed to calculate the molar composition of the gas contained in the outlet gas. The results, shown in Table 1 together with the conditions of the reaction.

References:

ASAHI GLASS COMPANY LIMITED;TAKEUCHI, YU;FURUTA, SHOJI JP2015/209397, 2015, A Location in patent:Paragraph 0056-0058; 0064

75-68-3 Synthesis