成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List Fluoroethylene carbonate
114435-02-8

Fluoroethylene carbonate synthesis

7synthesis methods
The preparation of Fluoroethylene carbonate is as follows:Add 114g of liquid ethylene carbonate at 50, 1.14g of palladium acetate (II) and 114g of dry acetonitrile (water 100ppm) to a 500ml Monel reactor containing the monophenyl iodine difluoride prepared in step (1) , Stir at 50°C for 0.5h, raise the temperature to 70°C and react for 5h (the molar ratio of ethylene carbonate to hydrogen fluoride in step (1) is 1.1:2.5, the molar ratio of ethylene carbonate to acetonitrile is 1.1:2.8, palladium acetate (II) The dosage is 1.0% of the mass of ethylene carbonate). The tail gas during the reaction was absorbed by potassium hydroxide solution with a mass fraction of 10%. After the reaction, vacuum distillation was carried out under the condition of 3mmHg. The 65-71°C fraction was collected to obtain 103.3g of fluoroethylene carbonate with a GC content of 99.3%. The yield of FEC was 75%.
-

Yield:114435-02-8 98.2%

Reaction Conditions:

with N-fluorobis(benzenesulfon)imide at 120; for 0.5 h;Sealed tube;Reagent/catalyst;

Steps:

2 example 2

Into a sealed reactor, 100 g of ethylene carbonate and 370 g of N-fluorobistrifluoromethanesulfonamide were added and stirred, and the temperature was raised to 120°C. HPLC analysis until the reaction time of ethylene carbonate was undetectable , the reaction time was 0.9 h, and the reaction was stopped. The fluoroethylene carbonate product was separated by distillation and had a purity of >99.9% and a yield of 97.8%.the chroma was 8 Hazen. Replace the above fluorinated reagent with 390 g of N-fluorobisbenzenesulfonamide. Under the same conditions, the complete reaction time was 1/2 h, the purity was >99.9%, the yield was 98.2%, and the chroma was 8 Hazen.

References:

CN108033943,2018,A Location in patent:Paragraph 0020; 0024; 0025

Fluoroethylene carbonate Related Search: