Method for preparing electronic grade dimethoxymethane through lateral-line reactive extraction rectifying
An extractive rectification and extractive rectification tower technology, which is applied in the field of side-line reactive extraction and rectification to prepare electronic grade methylal, can solve the problems of complicated purification process, low purity of reaction products, high utilization cost of by-products, and reduce energy consumption. , the process is simple, the effect of improving the purity and yield
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[0023] The method for preparing electronic grade methylal by side-line reaction extractive distillation of the present invention refers to figure 1 The process flow shown and the process condition parameters shown in Table 1 were performed. The experiment is carried out under normal pressure, the device such as figure 2 with image 3 As shown, the inner diameter of the tower is 22mm, and φ3*3θ type stainless steel packing is installed inside. The height of the iso-plate is 27mm through the standard system measurement.
[0024] The catalyst toluene sulfonic acid is added to the reactor of the reactive extraction distillation tower B1 at one time, the addition amount is 5.0kg, the excess methanol and formaldehyde solution are continuously added by ①, and the mass ratio of methanol and formaldehyde solution is 1.2~1.3:1.0. The extractant glycerin is continuously added from ②, with a flow rate of 100kg / h, and the two materials ① and ② are added into the tower at the same rate at the...
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