On-line soft measurement method of pH value and H2 SO3 concentration in acrylonitrile polymerization system
A technology of H2SO3 and acrylonitrile, which is applied to the analysis of materials and instruments, and can solve problems such as the inability to understand the polymerization process, the comprehensive correlation equation that has not been found, and the unstable quality of subsequent spinning.
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[0040] 1. Detection data, using conventional detection devices to detect operating variables, the specific operating variables are methyl acrylate (MA), acrylonitrile (AN), recovered monomer (RM), oxidizing agent sodium chlorate (A2), reducing agent coke Sodium bisulfite (A3), sodium methacryl sulfonate (A1), β hydroxyethanethiol (A4) and pure water (DW) and other 8 kinds of material flows into the polymerization tank, and the reaction temperature of the polymerization tank (A5 );
[0041] 2. Data preprocessing, converting the detected operational variables into percentage concentrations and performing normalization processing. The above-mentioned detected operating variables can be sent to the computer, and the computer will convert the following variables:
[0042] ① Calculate the total flow;
[0043] ②Calculate the percentage concentration of sodium methacrylate (A1) in the polymerization kettle;
[0044] 3. Calculate the percentage concentration of oxidant sodium chlora...
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