Method for co-producing isopropylbenzene and propylene by using benzene and isopropanol
A technology of isopropyl alcohol and cumene, applied in the field of co-production of cumene and propylene, can solve problems such as life span reduction
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Embodiment 1
[0014] Synthesis of Beta molecular sieves with BEA topology. 600g 40wt.% silica sol, 38.9g sodium aluminate (alumina content 42wt.%), 70.6g 25wt.% tetraethylammonium hydroxide (TEAO hour), 5.0g diethylamine (DEA), 168.0g tetra Ethylammonium bromide (TEABr), 16.0g sodium hydroxide, 136.0g 25wt.% ammonium hydroxide, and 925.1g water were mixed, and stirred evenly at room temperature. Then transferred to a stainless steel autoclave, the crystallization temperature was 155°C, and reacted for 50 hours. After the reaction, the crystalline product was filtered, washed and dried. The crystalline product obtained by XRD powder diffraction analysis is Beta zeolite.
[0015] Take 50 g of dried powder sample, exchange 4 times with 1M ammonium nitrate, filter and dry. Afterwards, it is fully mixed with 20g of alumina, kneaded with 5wt% nitric acid, extruded into strips of φ1.6×2mm, dried at 120°C for 12 hours, and calcined at 500°C for 6 hours to produce the required catalyst.
Embodiment 2
[0017] Synthesis of MCM-22 molecular sieves with MWW topology. Sodium aluminate (Al 2 o 3 35.21wt%, Na 2 (21.12wt%) 14.5g is dissolved in 990g water, adds sodium hydroxide 6.18g and makes it dissolve, then adds organic amine templating agent hexamethyleneimine 49.5g under the situation of stirring, then adds silica sol (SiO 2 40wt%) 150g, put it into a stainless steel reaction kettle after stirring evenly, and crystallize at 150°C for 50 hours under stirring. It is then cooled, the crystallized solid product is filtered, and the mother liquor of crystallization is recovered. The above solid crystalline product was filtered, washed and dried. The obtained crystals were determined to be MCM-22 by X-ray diffractometer. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 18.
[0018] Take 50 g of dried powder sample, exchange 4 times with 1M ammonium nitrate, filter and dry. Afterwards, it is fully mixed with 20g of alumina, kneaded with 5wt% nitric a...
Embodiment 3
[0020] Synthesis of MCM-56 molecular sieves with MWW topology. Sodium aluminate (Al 2 o 3 35.21wt%, Na 2 (21.12wt%) 14.5g is dissolved in 990g water, adds sodium hydroxide 6.18g and makes it dissolve, then adds organic amine templating agent hexamethyleneimine 49.5g under the situation of stirring, then adds silica sol (SiO 2 40wt%) 150g, put it into a stainless steel reaction kettle after being stirred evenly, and crystallize at 140°C for 50 hours under stirring. It is then cooled, the crystallized solid product is filtered, and the mother liquor of crystallization is recovered. The above solid crystalline product was filtered, washed and dried. The obtained crystals were determined to be MCM-56 by X-ray diffractometer. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 20.
[0021] Take 50 g of dried powder sample, exchange 4 times with 1M ammonium nitrate, filter and dry. Afterwards, it is fully mixed with 20g of alumina, kneaded with 5wt% nit...
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