Method for oxidizing dimethyl sulfide
A technology of dimethyl sulfide and oxidant, which is applied in chemical instruments and methods, preparation of organic compounds, chemical industry, etc., can solve the problems that dimethyl sulfone application research has not yet been carried out well, and achieve high effective utilization rate of oxidant , reduce the probability of occurrence, and reduce the effect of separation costs
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Embodiment 1
[0101] use figure 1 The reaction device shown in the reaction, wherein, the number of theoretical plates of the reaction section is 70, and dimethyl sulfide is sent into the reaction section through three feeding points arranged at equal intervals, and dimethyl sulfide is used in the reaction section The flow direction in is used as a reference, the first feed point is located at the bottom of the reaction section, and the number of theoretical plates corresponding to the third feed point is 35.
[0102] The molding titanium-silicon molecular sieve TS-1 (titanium oxide content is 2.5% by weight in the titanium-silicon molecular sieve TS-1 as catalyst, and the average particle diameter of molding titanium-silicon molecular sieve TS-1 is 25 μ m, with the total of molding titanium-silicon molecular sieve TS-1 Based on the quantity, the content of titanium-silicon molecular sieve TS-1 is 75% by weight, the content of silicon oxide as a binder is 25% by weight), methanol as a solve...
Embodiment 2
[0109]Adopt the same method as Example 1 to oxidize dimethyl sulfide, the difference is that the shaped titanium-silicon molecular sieve TS-1 uses an equal amount of shaped hollow titanium-silicon molecular sieve (the content of titanium oxide in the hollow titanium-silicon molecular sieve is 2.5% by weight, The average particle size of the molded hollow titanium-silicon molecular sieve is 25 μm, based on the total amount of the molded hollow titanium-silicon molecular sieve, the content of the hollow titanium-silicon molecular sieve is 75% by weight, and the content of silicon oxide as a binder is 25% by weight) instead of .
[0110] After 0.5h and 180h of stable operation, samples were taken and analyzed respectively, and the conversion rate of dimethyl sulfide, the selectivity of dimethyl sulfoxide and the effective utilization rate of oxidant were calculated. The results are shown in Table 1.
Embodiment 3
[0112] Adopt the same method as Example 1 to oxidize dimethyl sulfide, the difference is that the molding titanium-silicon molecular sieve TS-1 uses an equivalent amount of molding titanium-silicon molecular sieve Ti-MCM-41 (oxidized in titanium-silicon molecular sieve Ti-MCM-41 The content of titanium is 3% by weight, and the average particle size of the shaped titanium-silicon molecular sieve Ti-MCM-41 is 25 μm. Based on the total amount of the shaped titanium-silicon molecular sieve Ti-MCM-41, the content of the titanium-silicon molecular sieve Ti-MCM-41 75% by weight, the content of silicon oxide as a binder is 25% by weight) instead. After 0.5h and 100h of stable operation, samples were taken and analyzed respectively, and the conversion rate of dimethyl sulfide, the selectivity of dimethyl sulfoxide and the effective utilization rate of oxidant were calculated. The results are shown in Table 1.
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