A production method and production system for preparing isoprene by using catalyst carbon-deposited methyl tert-butyl ether and formaldehyde
A technology of methyl tertiary butyl ether and production method, applied in chemical instruments and methods, catalysts, carbon compound catalysts, etc., can solve the problems of uncontrollable carbon deposition reaction, uncontrollable and uncontrollable carbon content and carbon composition, etc.
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Embodiment 1
[0169] see figure 1 , figure 1 A simplified process flow diagram of the isoprene production system provided by the present invention.
[0170] On the riser reactor, with MoP / SiO 2 Be catalyzer, catalyst circulation rate is 3kg / h, and reactor temperature is 320 ℃, and MTBE enters reactor from feed inlet 1, and feed rate is 10kg / h, and heating section 1 temperature is 280 ℃, and catalyzer and MTBE contact time ( The time from feed port 1 to feed port 3) is 1.4s, the pre-coke content of the catalyst is 2.6wt%, the auxiliary gas flow rate is 50L / h, the formaldehyde feed rate is 2kg / h, and the contact time between the catalyst and aldehydes and alkenes It is (the time from feed port 3 to the separator) 1.0s, the regenerator temperature is 550°C, the air flow rate is 3000L / h, the residence time of the catalyst in the regenerator is 40min, and the carbon content of the regenerated catalyst is 4.6wt%. , the reaction continued for 10h, the average conversion rate of MTBE was 96%, th...
Embodiment 2
[0180] On the riser reactor, with CrP / SiO 2 It is a catalyst, the catalyst circulation rate is 5.8kg / h, the reactor temperature is 350°C, MTBE enters the reactor from the feed port 1, the feed rate is 8kg / h, the temperature of the heating section I is 300°C, the contact time between the catalyst and MTBE (the time from feed port 1 to feed port 3) is 1.6s, the pre-coke content of the catalyst is 1.9wt%, the auxiliary gas flow rate is 0L / h, the formaldehyde feed rate is 1.2kg / h, the catalyst and aldehyde, olefin The contact time is (the time from feed port 3 to the separator) 1.0s, the regenerator temperature is 500°C, the air flow rate is 3200L / h, the residence time of the catalyst in the regenerator is 40min, and the carbon content of the regenerated catalyst is 5.3 wt%, the reaction continued for 10h, the average conversion rate of MTBE was 92%, the average selectivity was 86%, the average conversion rate of formaldehyde was 95%, and the average yield of product isoprene was ...
Embodiment 3
[0182] On the riser reactor, with Mo-V-P / SiO 2 It is a catalyst, the catalyst circulation rate is 5.5kg / h, the reactor temperature is 290°C, MTBE enters the reactor from the feed port 1, the feed rate is 10kg / h, the heating section I temperature is 250°C, the catalyst and MTBE contact time (the time from feed port 1 to feed port 3) is 1.8s, the pre-coke content of the catalyst is 3.5wt%, the auxiliary gas flow rate is 100L / h, the formaldehyde feed rate is 1.8kg / h, the catalyst and aldehyde, alkene The contact time is (the time from feed port 3 to the separator) 2s, the regenerator temperature is 520°C, the air flow rate is 2600L / h, the residence time of the catalyst in the regenerator is 60min, and the carbon content of the regenerated catalyst is 5.2wt %, the reaction continued for 10h, the average conversion rate of MTBE was 89%, the average selectivity was 85%, the average conversion rate of formaldehyde was 96%, and the average yield of product isoprene was 58% (in formald...
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