Olefin isomerization catalyst and preparation method thereof
A technology of olefin isomerization and catalyst, which is applied in the field of olefin isomerization catalyst and its preparation, and can solve problems such as the complexity of the reaction process
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[0019] The preparation method of the catalyst provided by the present invention includes mixing molecular sieves and binders, drying and roasting to obtain a carrier, and then impregnating with a modified compound and an organic solution. Set aside to dry.
[0020] The molecular sieve is preferably one or any two of ZSM-35, ZSM-22 and SAPO-11, and the binder is preferably alumina.
[0021] The method of mixing molecular sieve and binder in the method of the present invention is extruding, dropping ball, rolling ball or tableting method, preferably extruding. The extruding method is as follows: uniformly mix the molecular sieve with the binder or its precursor, add an appropriate amount of extrusion aid and / or peptizer and knead, and then extrude. The extrusion aid is preferably squash powder, and the peptizing agent is preferably an inorganic acid, such as hydrochloric acid or nitric acid. After the wet strip is cut into pellets, the carrier is obtained by drying and roastin...
example 1
[0033] Mix 10,788 grams of HZSM-35 molecular sieve with a molar ratio of silica and alumina of 25, and 1,637.8 grams of pseudoboehmite (manufactured by Condea, Germany, with a dry basis alumina content of 74% by mass), and add 65.5 grams of % concentrated nitric acid and 10770 grams of water, extruded into a trefoil strip with a diameter of 1.1 mm with a twin-screw extruder, pelletized, then dried at 120°C for 4 hours, and roasted at 550°C for 2 hours to obtain the carrier S 1 , wherein the content of HZSM-35 molecular sieve is 90% by mass, and the content of alumina is 10% by mass.
[0034] Take 2000 grams of carrier S 1, with 1939 ml of n-heptane solution containing 136.7 g (1.264 mol) o-cresol, saturated impregnation at 25 ° C for 0.5 hours, and then dried at 90 ° C and 0.01 MPa for 2 hours to obtain catalyst C 1 , whose weight is 2133.2 g, indicating that the catalyst C 1 Contains 133.2 grams of o-cresol, o-cresol and carrier S 1 The mass ratio is 0.067.
example 2
[0036] Take 2000 grams of carrier S 1 , with 1939 ml of n-heptane solution containing 287.8 g (2.661 mol) of o-cresol, saturated impregnation at 25 ° C for 0.5 hours, and then dried at 90 ° C and 0.01 MPa for 2 hours to obtain catalyst C 2 , whose weight is 2283.3 g, indicating that the catalyst C 2 Contains 283.3 grams of o-cresol, o-cresol and carrier S 1 The mass ratio is 0.14.
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