Continuous production technology of fluorine-containing surfactant without perfluorocaprylic acid
A surfactant, perfluorooctanoic acid technology, applied in organic chemistry, carboxylate preparation, carboxylate preparation, etc., can solve the problem that chemical characteristics cannot be characterized by any molecular chain or group in its structural formula, vary widely, and are Amplification and other problems, to achieve the effect of good surface activity characteristics, low yield, and avoid hidden dangers of production safety
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Embodiment 1
[0056] This embodiment proposes a continuous production process for a fluorosurfactant that does not contain perfluorooctanoic acid, comprising the following steps:
[0057] A: Perfluoroalkene, oxygen and a third monomer (such as chloroacetylene) continuously enter the photooxidation reaction loop at a temperature of 0°C and a pressure of 0.1Mpa, and produce terminal products containing acyl fluoride after photooxidation;
[0058] B: Send the product containing acyl fluoride end group to the hydrolysis unit, after hydrolysis and separation, obtain a fluorine-containing low polymer with a carboxylic acid group at one end;
[0059] C: Feed the fluorine-containing low polymer with a carboxylic acid group at one end obtained in step B into the salt-forming configuration unit, and after the salt-forming configuration, the finished fluorine-containing surfactant is obtained, and the finished fluorine-containing surfactant is sent to finished product storage tanks for storage,
[00...
Embodiment 2
[0068] The continuous production process of the fluorosurfactant not containing perfluorooctanoic acid involved in this embodiment comprises the following steps:
[0069] A: Perfluoroolefins, oxygen and a third monomer (such as vinylidene fluoride) continuously enter the photooxidation reaction loop at a temperature of 20°C and a pressure of 0.5Mpa, and produce terminal products containing acyl fluoride after photooxidation;
[0070] B: Send the product containing acyl fluoride end group to the hydrolysis unit, after hydrolysis and separation, obtain a fluorine-containing low polymer with a carboxylic acid group at one end;
[0071] C: Feed the fluorine-containing low polymer with a carboxylic acid group at one end obtained in step B into the salt-forming configuration unit, and after the salt-forming configuration, the finished fluorine-containing surfactant is obtained, and the finished fluorine-containing surfactant is sent to finished product storage tanks for storage,
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Embodiment 3
[0080] The difference between this example and Example 1 is that in step A involved in this example, the mass ratio of perfluoroolefin to the third monomer is 1:1.
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