Preparation method for hydrodewaxing catalyst and catalyst prepared by using same, and application of catalyst
A hydrodewaxing and catalyst technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex process start-up process, and achieve the effect of high yield and high isomerization selectivity.
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[0027] The present invention provides a method for preparing a hydrodewaxing catalyst, the method comprising: a. first impregnating a molecular sieve-inorganic oxide carrier with an ammonium salt solution and drying to obtain an impregnated carrier; wherein the molecular sieve has a A molecular sieve with a one-dimensional elliptical pore structure, the minor axis of the one-dimensional elliptical pore structure is The major axis of the one-dimensional elliptical hole structure is The ratio of the ammonium salt to the molecular sieve-inorganic oxide carrier is 0.01-0.2 mol / 100 g, preferably 0.02-0.05 mol / 100 g; b, mixing the hydrogenation active metal salt with water to obtain the hydrogenation-containing A solution of an active metal salt; using at least one selected from ammonia, ammonium carbonate and urea to adjust the pH of the solution containing the hydrogenation active metal salt to 10.0-12.0 to obtain an impregnating solution; c. The obtained impregnated support is...
specific Embodiment approach
[0030] According to a specific embodiment of the method of the present invention, the preparation method of the molecular sieve-inorganic oxide carrier may be: mixing the molecular sieve with the matrix, extruding, drying and calcining. When forming by extrusion molding, an appropriate amount of extrusion aid and / or adhesive can be added, and then extruded. The type and amount of the extrusion aid and peptizer are well known to those skilled in the art, and will not be repeated here. The drying temperature is preferably 100-200°C, more preferably 120-150°C, and the drying time is preferably 1-20 hours, more preferably 2-10 hours. The calcination temperature is preferably 400-650°C, more preferably 500-600°C, and the calcination time is preferably 1-15 hours, more preferably 2-10 hours.
[0031] According to the method of the present invention, the ammonium salt in step a may be an inorganic ammonium salt, such as at least one selected from ammonium nitrate, ammonium chloride,...
Embodiment 1
[0043] Describe the catalyst provided by the invention and its preparation method.
[0044] After mixing the organic template, the silicon source and the aluminum source, the crystallization was carried out in a stainless steel reaction kettle at 400 Rpm at 160° C. for 96 hours to obtain 100% ZSM-22 molecular sieve. Among them, the organic template is ethyl pyridinium bromide, and the aluminum source is Al 2 (SO4) 3 16H 2 O, the silicon source is silica sol (SiO 2 Content is 30% by weight), the SiO of feeding 2 / Al 2 o 3 60, H 2 O / SiO 2 40,OH - / SiO 2 0.3, K + / SiO 2 is 0.43, template / SiO 2 The molar ratio of silicon to aluminum of ZSM-22 molecular sieve is 55. Gained molecular sieve 100 grams to contain 20% by weight NH 4 NO 3 1000 ml of the solution was treated at 90° C. for 4 hours, filtered, and treated 3 times with the above method. Dry the treated molecular sieve at 120° C. for 4 hours to obtain hydrogen ZSM-22 molecular sieve.
[0045] Mix the hydrogen-...
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