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ChemicalBook CAS DataBase List N-Vinylcaprolactam
2235-00-9

N-Vinylcaprolactam synthesis

5synthesis methods
Caprolactam and potassium hydroxide were added proportionally in a four-necked flask, evacuated and heated up to 140 ℃, and the potassium salt of caprolactam was produced while dehydrating. The caprolactam raw material, caprolactam potassium salt, polymer
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Yield:2235-00-9 81.9%

Steps:

2 Inventive

Example 2 Inventive Example 2 was carried out by adding 1% by weight of 1,4-diethoxybutane as cocatalyst. The amount of ethyne taken up was 0.87 mol per mole of ε-caprolactam. The distillative workup yielded N-vinyl-ε-caprolactam in a yield of 81.9%. A liquid distillation residue was obtained.

References:

US2003/28035,2003,A1

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