A control method and system for polyester resin synthesis and esterification process
The technology of a polyester resin and a control method, which is applied in the field of chemical synthesis control, can solve the problems of large loss of raw material alcohol, high energy consumption, influence on synthesis effect, etc., and achieve the effect of reducing heat consumption and reducing loss.
Active Publication Date: 2022-02-22
GUANGZHOU KINTE IND
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Problems solved by technology
However, in the esterification process of polyester resin synthesis, the temperature and reflux ratio required for each stage are different, and both temperature and reflux ratio affect the synthesis effect. However, the above-mentioned control methods all have the following characteristics: only control the synthesis The temperature of the process or only the reflux ratio of the synthesis process is controlled, so that when using the existing synthesis control method to control the synthesis of polyester resin, the loss of raw material alcohol is large and the energy consumption is high
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[0061] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.
[0062] refer to figure 1 , the embodiment of the present invention provides a control method for polyester resin synthetic esterification process, which is applied to the main control module, and the main control module is connected with the synthetic device of polyester resin, such as figure 2 As shown, the synthesis device includes a reactor 1, a rectification tower 2, a condenser 3, a reflux control module and a concentration detection module, the reactor 1 is connected to the bottom of the rectification tower 2,...
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The invention discloses a method and system for controlling the synthetic esterification process of polyester resin. The method comprises the following steps: determining the stage of the synthetic esterification process of polyester resin; preset the heating rate and the preset reflux ratio according to the stage; Detect the alcohol concentration of the distillate; adjust the actual heating rate and the actual reflux ratio according to the alcohol concentration of the distillate, the preset heating rate and the preset reflux ratio. The present invention determines the stage of the synthetic esterification process of the polyester resin first, then presets different heating rates and reflux ratios according to the stages of the synthetic esterification process of the polyester resin, and finally presets the heating rate according to the alcohol concentration of the distillate and reflux ratio to adjust the actual heating rate and actual reflux ratio, so that the synthesis efficiency of polyester resin can be optimized, while reducing the loss of raw materials and reducing the heat consumption of the refluxed aqueous solution during the reaction process. The invention can be widely used in the technical field of chemical synthesis control.
Description
technical field [0001] The invention relates to the technical field of chemical synthesis control, in particular to a control method and system for polyester resin synthesis and esterification process. Background technique [0002] The first-stage reaction of polyester resin synthesis for powder coatings is an esterification reaction, which has a small equilibrium constant, and it is necessary to remove the water generated in the raw materials and the reaction to promote the positive shift of the equilibrium. Since the raw materials for polyester resin synthesis include polybasic acids and polyols, among them, neopentyl glycol (or 90% neopentyl glycol aqueous solution), ethylene glycol, methyl propylene glycol, etc. are mostly used in polyols. The boiling point of these alcohols is lower than that of water Close, usually miscible with water in any proportion, therefore, it is difficult to separate the alcohol in the raw material from the water in the system. Existing synthe...
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IPC IPC(8): B01J19/18C08G63/78B01D3/42B01D3/00
CPCB01J19/18B01D3/009C08G63/78B01D3/42
Inventor 曾定李勇程润刘亮王伟跃罗逸
Owner GUANGZHOU KINTE IND