Preparation method for catalyst used for preparing dimethyl ether through methanol dehydration
A methanol dehydration and catalyst technology, applied in the chemical field, can solve the problems of high cost, high temperature carbon deposition, low temperature activity and other problems, and achieve significant environmental protection benefits and economic benefits, cost reduction, and low cost effects
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Embodiment 1
[0024] Take 10 grams of bentonite and add it to 100 ml of nitric acid solution with a concentration of 1 mol / L, stir at room temperature for 1 hour, filter, wash, dry the filter cake at 120°C, and roast at 290°C for 5 hours. Immerse with heteropolyacid solution overnight, dry at 120°C, and bake at 290°C for 5 hours to obtain a catalyst, wherein the content of heteropolyacid is 14wt%.
[0025] Take 0.4 g of such a catalyst of 60-80 mesh and add it to a fixed bed reactor, then feed nitrogen gas at a rate of 100 ml / min, while adjusting the temperature of the reactor to 220 ° C, and methanol with a mass space velocity of 1 h -1 The rate passed through the catalyst bed, during which the reactor was kept at normal pressure and 220°C. The results are shown in Table 1:
Embodiment 2
[0027] The catalyst used is the same as in Example 1, except that the heteropolyacid content is 10 wt%. As in Example 1, the experimental determination of methanol dehydration to dimethyl ether was carried out. The results are shown in Table 1:
Embodiment 3
[0029] The catalyst used is the same as in Example 1, except that the heteropolyacid content is 4 wt%. As in Example 1, the experimental determination of methanol dehydration to dimethyl ether was carried out. The results are shown in Table 1.
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