2-Methylimidazole CAS 693-98-1

Imidazole is a five-membered aromatic heterocyclic compound containing two meta-position nitrogen atoms in its molecular structure. The unshared electron pair of the 1-position nitrogen atom in the imidazole ring participates in the cyclic conjugation, and the electron density of the nitrogen atom decreases, making this nitrogen atomic. The hydrogen on the atom easily leaves in the form of hydrogen ion. Its structure determines that it is not only acidic, but also basic, and can also form salts with strong bases. In addition, alkyl imidazoles are common and important compounds among imidazoles.

CN201711341304.4 proposes a preparation method of 1-ethyl-2-methylimidazole, wherein the method comprises the following steps: after adding 2-methylimidazole to a reactor, slowly adding an acid binding agent, and The aprotic solvent is continued to be added under stirring conditions; ethyl chloride is introduced into the mixed solution in the reaction kettle, and after fully reacting at a preset temperature for a first preset time, the mixed solution obtained after the reaction is filtered, The aprotic solvent in the filtrate is removed under normal pressure, and then the 1-ethyl-2-methylimidazole is obtained by distillation under reduced pressure.

In order to solve the existing problems of PVC heat stabilizer products on the existing market, CN201710025714.1 provides a 2-methylimidazole zinc salt and its preparation method and application, the prepared 2-methylimidazole zinc salt and stearic acid Calcium and calcium-zinc stearate are compounded to obtain a green calcium-zinc compound heat stabilizer with excellent initial and long-term thermal stability. The preparation method is as follows:

1. 23.79g (molecular weight 297.49, 80mmol) zinc nitrate hexahydrate and 105.20g deionized water were added to the reaction vessel, 13.14g (molecular weight 82.10, 160mmol) 2-methylimidazole was completely dissolved in 164.40g (mass fraction 25-28%) ammonia water was added to the above-mentioned reactor, the temperature was raised to 20 ° C, centrifuged after the reaction for 10 min, washed with deionized water until neutral, and dried at 65 ° C overnight to obtain a white solid 2-methylimidazole zinc salt;
2. Compounding 9.6g calcium stearate, 1.68g zinc stearate and 0.72g 2-methylimidazole zinc salt to obtain a calcium-zinc composite heat stabilizer.