Corrosion and scale inhibitor L-403 is composed of organic copolymer, azole, etc. It has good chelating and dispersing effect on calcium and magnesium ions in water, and has good corrosion inhibition effect on carbon steel and copper.
According to Simon’s Electrolytic Fluorination Method 27~30], long carbon chain fluoride was obtained for the first time, and it was first commercialized by 3M Company in the United States in 1950. In this process, the acid chloride or sulfonyl chloride of the hydrocarbon chain alkyl can be directly replaced with the corresponding perfluoroalkyl acyl fluoride or sulfonyl fluoride product.
C, Hz+1COX+(2n+2) HF–C.F 2+1C OF
X is Cl, F, OH
C, H?n+i SOX+(2n+2) HF→C, Fen iS OF
X is CI, F
Because the electrolytic fluorination reaction is very fierce and the CC bond is prone to rupture, in addition to the formation of perfluorinated compounds with the same carbon number as the raw material ptfe powder mixer, there are short-chain perfluorinated compounds and other types of by-products. Therefore, the yield of the daily standard product is very low. Using this reaction to produce fluorine-containing active surfactants are 3M Company in the United States, Dainippon Ink Company and Tohoku Fertilizer Company in Japan, etc.
Using this method, two key intermediates, perfluorocarboxylic acid fluoride and perfluorosulfonyl fluoride, can be prepared, and a series of fluorocarbon surfactants for different purposes can be synthesized by using them.
The fluoroolefin telomerization reaction was first proposed by the British Professor Has zeldin e method 1-ad.
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