A kind of method for preparing methyl tert-amyl ether
A technology of methyl tert-amyl ether and methyl butene, which is applied in the field of preparation of methyl tert-amyl ether, can solve the problems of corrosion equipment, increase of by-products, easy falling off of sulfonic acid groups, etc., and achieve high conversion rate, Easy to operate and good stability
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[0029] In the preparation process of the above-mentioned titanium-based composite oxide, the reaction time is 3h-24h, preferably 5h-20h, most preferably 6h-12h. The drying temperature is from 100°C to 180°C, preferably from 100°C to 160°C, most preferably from 100°C to 120°C. The drying time is 8h-24h, preferably 6h-16h, most preferably 8h-12h. The calcination temperature is 400°C-600°C, preferably 400°C-550°C, most preferably 400°C-500°C. The calcination time is 8h-24h, preferably 8h-20h, most preferably 8h-16h.
[0030] The formed titanium-based composite oxide support is impregnated in a heteropolyacid solution according to a conventional impregnation method. The immersion time is 6h-24h, preferably 6h-16h, most preferably 8h-12h. The impregnation is dried at 100°C to 160°C for 6h to 12h, preferably at 100°C to 140°C for 6h to 10h, most preferably at 100°C to 120°C for 8h to 10h. The impregnated material is roasted at 350°C-650°C for 8h-24h, preferably at 400°C-550°C fo...
Embodiment 1
[0033] Prepare a certain amount of magnesium nitrate and a certain amount of titanium tetrachloride to prepare aqueous solution a, prepare potassium hydroxide alkaline solution b, add solution b dropwise to a under normal temperature and stirring state, and react for 10 hours to obtain a white paste After washing, filtering, and drying at 120°C for 10h, extruding according to the conventional method, and then calcining at 500°C for 8h to obtain a titanium-based composite oxide carrier.
[0034] Dissolve a certain amount of phosphomolybdic acid in deionized water, immerse the above-mentioned shaped and roasted catalyst carrier in the heteropoly solution for 8 hours, dry the impregnated material at 120°C for 10h, and roast at 450°C for 10h to prepare Obtain the catalyst, and the physical properties of the catalyst are shown in Table 1.
[0035] The etherification of 2-methylbutene and methanol is carried out in a Φ18mm×1200mm stainless steel fixed-bed reactor, and 30ml of the ab...
Embodiment 2
[0037] Other conditions are the same as in Example 1, except that the consumption of magnesium nitrate and phosphomolybdic acid is changed, the catalyst composition is shown in Table 1, and the reaction results are shown in Table 2.
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