Reaction device and method for synthesizing phthalic anhydride
A phthalic anhydride, reaction device technology, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve the problems of unstable operation, large floor space, large equipment investment, etc., and achieve equipment investment. The effect of large size, large floor space and high processing energy consumption
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Embodiment 1
[0027] A reaction device for synthesizing phthalic anhydride, comprising a reactor 1 and a heating device 3 for heating the reactor 1, the upper surface of the heating device 3 is provided with a container 2 for holding a heating medium, the Reactor 1 is a "U" type reactor composed of feed pipe 101, secondary reaction chamber 102, main reaction chamber 103 and discharge pipe 104. Said secondary reaction chamber 102 is arranged outside container 2, said main reaction chamber 103 is arranged in the container 2, and the two ends of the reaction tube extend to the outside of the container 2. By adjusting the lengths of the secondary reaction chamber 102 and the main reaction chamber 103, the reaction liquid is fully contacted with the solid catalyst and then left for a required reaction time before flowing out.
Embodiment 2
[0029] This embodiment synthesizes bio-based phthalic anhydride, and the reaction steps are as follows:
[0030] Step 1: Filling of the solid catalyst: take two 0.6g Amberlyst-15 solid catalysts and fill them in the secondary reaction chamber 102 and the main reaction chamber 103 respectively.
[0031] Step 2: 0.4000g acetic anhydride, 0.0202g internal standard sulfolane, 0.0204g purified furan and the cycloaddition intermediate product of maleic anhydride Diels-Alder reaction are made into a reaction liquid, and input from the feed pipe port with a pipette gun In the reaction chamber, the ratio of the feed pipe 101, the secondary reaction chamber 102, the main reaction chamber 103 and the discharge pipe 104 is 0.5:3:0.5:0.5, and the timing begins when the first drop of the reaction solution touches the reaction chamber, until the first The drop reaction solution flows out of the reaction chamber, which is the retention time of the reaction solution in the reaction chamber. Th...
Embodiment 3
[0045] The method for synthesizing bio-based phthalic anhydride in this embodiment is basically the same as the method in Example 2, and the specific operation steps are as follows:
[0046] Step 1: Filling of the solid catalyst: take two 0.6g Amberlyst-15 solid catalysts and fill them in the secondary reaction chamber 102 and the main reaction chamber 103 respectively.
[0047] Step 2: 0.4000g acetic anhydride, 0.0202g internal standard sulfolane, 0.0206g purified furan and the cycloaddition intermediate product of maleic anhydride Diels-Alder reaction are made into a reaction liquid, and input from the feed pipe port with a pipette gun In the reaction chamber, the ratio of the feed pipe 101, the secondary reaction chamber 102, the main reaction chamber 103 and the discharge pipe 104 is 0.5:2:1:0.5, and the timing begins when the first drop of the reaction solution touches the reaction chamber, until the first drop of the reaction liquid touches the reaction chamber. The drop...
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