Method for preserving microshpere catalyst for oxygen-containing compound conversion to produce olefine
A technology of catalysts and compounds, which is applied in the field of preservation of catalysts for conversion of oxygenated compounds to olefin microspheres, and can solve problems such as delays in the production process of the factory, long time consumption, and losses
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Embodiment 1
[0014] The microsphere catalyst (containing 30% SAPO-34 molecular sieve, 1% cinnamon powder) was raised from room temperature to 500°C (3°C / min) under 15ml / min nitrogen atmosphere, and kept at this temperature for 1h, and then Cool down to room temperature. The carbon-containing catalyst is gray-black in appearance, and thermal analysis shows that the obtained carbon-containing catalyst has a weight loss on calcination of 2.1 wt%. Carbon-containing catalysts are stored at room temperature in an open container.
Embodiment 2
[0018] The microsphere catalyst (containing 30% SAPO-34 molecular sieve, 1% fenugreek powder) was raised from room temperature to 400°C at a heating rate of 3°C / min under 15ml / min nitrogen atmosphere, and kept at this temperature for 2h, and then the catalyst was Cool down to room temperature under a nitrogen atmosphere. The catalyst is gray-black in appearance, and thermal analysis shows that the weight loss on calcination of the obtained carbon-containing catalyst is 2.9 wt%. Carbon-containing catalysts are stored at room temperature in an open container.
Embodiment 3
[0019] Embodiment 3 (reaction of methanol conversion to olefins)
[0020] Reaction conditions: fixed-bed reactor, 2.5 grams of 20-40 mesh granular catalyst samples, first activated at 550° C. with nitrogen for 1 hour, and then cooled to 500° C. for reaction. Feed by micropump, 40% methanol aqueous solution, methanol weight space velocity 2.0h -1 . The composition of the reaction products was analyzed by online gas chromatography.
[0021] The samples stored for 30 days and 300 days in Example 1 were calcined at 600°C under an air atmosphere to completely remove carbon residues or hydrogen-deficient compounds contained in the catalyst to obtain white catalyst samples, which were respectively designated as CMTO1-30 and CMTO1-300. The freshly calcined catalysts and the samples stored for 30 days in Comparative Example 1 are denoted as WMTO-0 and WMTO-30, respectively. The samples preserved for 30 days and 500 days in Example 2 were roasted at 600° C. under a nitrogen atmospher...
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