Method for preparing isobutene by cracking methyl tert-butyl ether
A technology of methyl tertiary butyl ether and isobutylene, applied in the chemical industry, can solve the problems such as the reduction of the real yield of isobutylene, and achieve the effects of low cost, high purity and good product quality
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Embodiment 1
[0024] The cracking reaction of methyl tert-butyl ether is carried out in a low-bed tube reactor with a tube length of 3.5 meters, using ML-01 catalyst, and a specific gravity of 0.5g / cm 3 , White spherical silica series catalyst with a diameter of 3-4mm, the catalyst bed height is 2 meters, the reaction temperature is 240-270°C, the reaction pressure is 0.08MPa, the molar ratio of water to methyl tert-butyl ether is 1.0, Other operating conditions and results are shown in Table 1.
[0025] Table 1. Operating conditions and results
[0026] project
Embodiment 2
[0027] Example 2, the cracking reaction of methyl tert-butyl ether is carried out in a low bed tube reactor, the tube length is 3.5 meters, ML-01 catalyst is selected, and the stack specific gravity is 0.45g / cm 3 , A white spherical silica catalyst with a diameter of 3-4mm, the height of the catalyst bed is 2 meters, the reaction temperature is 240-270°C, the reaction pressure is 0.05MPa, and the molar ratio of water to methyl tert-butyl ether is 2.0, Other operating conditions and results are shown in Table 2.
[0028] Table 2. Operating conditions and results
[0029] project
Embodiment 3
[0039] The methyl tert-butyl ether cracking reaction is carried out in a low-bed tube reactor with a tube length of 3 meters, using ML-01 catalyst, and a specific gravity of 0.45g / cm 3 , White spherical silica series catalysts with a diameter of 3-4mm, the height of the catalyst bed is 2 meters, and the liquid phase space velocity is 6h -1 , the reaction temperature is 240-270°C, the reaction pressure is 0.06MPa, and the molar ratio of water to methyl tert-butyl ether is 3.0.
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