Method for producing propane and gasoline from alkane
A paraffin and propane technology, which is applied in the production of liquid hydrocarbon mixtures, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of low reaction temperature and low catalyst activity, and achieve the effect of reducing the content of olefins
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[0023] The preparation method of the catalyst provided by the present invention includes mixing ZSM series zeolite and binder precursor, extruding and forming, then drying, roasting, and then treating with steam at 420-500°C. The mass of steam used and the catalyst after roasting The ratio is 1.0-4.0, and the α value of the catalyst after steam treatment is 60-80, preferably 60-70.
[0024] In the above method, the ZSM series zeolite is selected from ZSM-5 or a mixture of ZSM-5 and ZSM-35, preferably hydrogen zeolite. The binder precursor is preferably pseudo-boehmite, boehmite or silica sol.
[0025] The molding method of the catalyst of the present invention is as follows: mixing ZSM series zeolite and binder precursor, adding appropriate amount of water and peptizer, kneading and extruding into rods. The peptizer is selected from nitric acid, hydrochloric acid, acetic acid or formic acid, preferably nitric acid. When using a peptizer, it is preferably diluted to a solution...
example 1
[0033] Catalysts used in the present invention are prepared.
[0034] Get 130 grams of silicon oxide / alumina mol ratios and be 35 HZSM-5 zeolite powder (Jianchang Molecular Sieve Factory production, the same below), 70 grams of aluminum hydroxide powder (Qilu Catalyst Factory production, dry base alumina content 75 mass %, The same below), adding 90 milliliters of water and 4 milliliters of nitric acid solution with a concentration of 1% by mass, kneading, extruding, drying at 110° C. for 4 hours, and roasting at 550° C. for 4 hours. Then put it into a tubular reactor, raise the temperature to 470° C. in an air flow under normal pressure, and pass in water vapor for 3 hours. The total water intake is 300 grams. The composition and α value of the prepared catalyst A are shown in Table 1, wherein the alumina is γ-Al 2 o 3 .
example 2
[0036] Get 130 grams of silicon oxide / alumina mol ratio and be 30 HZSM-35 zeolite powder (build factory molecular sieve factory production), 70 grams of aluminum hydroxide powders, add 90 milliliters of water and 4 milliliters of concentrations and knead the nitric acid solution of 1 mass %, Extrude, dry at 110°C for 4 hours, and bake at 550°C for 4 hours. Then put it into a tubular reactor, raise the temperature to 470° C. in the air flow under normal pressure, and pass in water vapor for 3 hours, with a total water intake of 300 grams. The composition and α value of the prepared catalyst B are shown in Table 1, wherein the alumina is γ-Al 2 o 3 .
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