2,6-dimethylphenol composition
一种二甲基酚、组合物的技术，应用在有机化合物的制备、其他化学过程、运输和包装等方向，能够解决不能如希望地控制聚合活性或分子量分布、杂质含量不同等问题
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Embodiment 1
[0072] In a 50L jacketed reactor, the bottom is equipped with a distributor for introducing oxygen-containing gas, a stirring turbine and a baffle, and in the exhaust line at the upper part of the reactor, a reflux condenser with a drier is used to separate the adhering to the reflux condenser To the condensate at the bottom, add 3.3497g of cuprous oxide, 20.1484g of 47% aqueous hydrogen bromide, 39.0655g of di-n-butylamine, 99.0826g of dimethyl-n-butylamine, 8.0692g of N,N'-di tert-butylethylenediamine, 2.000 g of trioctylmethylammonium chloride, and 14730.3 g of toluene to prepare an initial stock solution. Under vigorous stirring, air was introduced from the sparger at a rate of 28 L / min. Simultaneously, start adding 2600 g of monomer solution into 2498.0 g of toluene by means of a plunger pump at a rate of 30 minutes to complete the feed. It was obtained by adjusting the content of m-cresol to 20 ppm. The polymerization temperature was maintained at 40°C by introducing a...
Embodiment 2
[0074] The reaction was performed in the same manner as in Example 1, except that the refined 2,6-dimethylphenol was adjusted to contain 80 ppm of m-cresol. The time and color index required for polyphenylene ether are also listed in Table 1.
Embodiment 3
[0076] The reaction was performed in the same manner as in Example 1, except that the refined 2,6-dimethylphenol was adjusted to contain 350 ppm of m-cresol. The time and color index required for polyphenylene ether are also listed in Table 1.
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