Catalyst for producing propylene by catalytic cracking of naphtha, preparation method thereof, and method for producing propylene by catalytic cracking of naphtha
A catalytic cracking and catalyst technology is applied in the catalyst field of naphtha catalytic cracking to produce propylene and naphtha catalytic cracking to produce propylene, which can solve the problems of small propylene output and achieve the effect of improving yield
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[0037] Catalysts that meet the aforementioned requirements of the present invention can all achieve the purpose of the present invention, and the present invention has no special requirements for its preparation method. According to a preferred embodiment of the present invention, the catalyst is prepared as follows: (1) molecular sieve and Aqueous solvents are mixed and ground to obtain a molecular sieve slurry;
[0038] (2) mixing the molecular sieve slurry with a matrix source to form an active component coating slurry;
[0039] (3) coating the regular structure carrier with the active component coating slurry and drying and roasting;
[0040] Wherein, the molecular sieve contains a first molecular sieve, a second molecular sieve and a third molecular sieve, the first molecular sieve is a molecular sieve with a MWW structure, the second molecular sieve is a molecular sieve with a twelve-membered ring channel structure, and the third molecular sieve is a molecular sieve with...
Embodiment 1
[0068] This example is used to illustrate the preparation method of the catalyst provided by the present invention and the method for producing propylene by catalytic cracking of naphtha.
[0069](1) Preparation of catalyst. Mix 10 grams of SAPO-34 molecular sieve (Tianjin Kaimesite Technology Development Co., Ltd., Si / Al molar ratio = 0.25:1) with 10 grams of deionized water, and wet ball mill to form a molecular sieve slurry. The particle diameter of the molecular sieve is d90 = 8 microns , The solid content is 50% by weight. Add 3 grams of aluminum sol (containing 22% by weight of alumina, produced by Sinopec Catalyst Qilu Branch) in the slurry, stir for 10 minutes, add 0.5 g of polyethylene glycol solution (the weight percent of polyethylene glycol solution is 2% by weight), Stirring for 20 minutes gave catalyst coating preparation mixture slurry (coating slurry) 1.
[0070] The active component coating slurry 1 is coated with a cordierite honeycomb carrier (the carrier ...
Embodiment 2
[0077] This example is used to illustrate the preparation method of the catalyst provided by the present invention and the method for producing propylene by catalytic cracking of naphtha.
[0078] (1) Preparation of catalyst. Mix 30 grams of ITQ-3 molecular sieve (Si / Al molar ratio = 10:1) with 60 grams of deionized water, and wet ball mill to form a molecular sieve slurry. The particle diameter of the molecular sieve is d90 = 8 microns, and the solid content is 33.3% by weight. Add 10 grams of silica sol (containing 21% by weight of silicon oxide, produced by Sinopec Catalyst Qilu Branch) to the slurry, stir for 10 minutes, add 4.5 grams of polyacrylic acid solution (the weight percent of polyacrylic acid solution is 1% by weight), and stir for 30 minutes to obtain Catalyst Coating Preparation Mixture Slurry (Coating Slurry) 1.
[0079] The active component coating slurry 1 is coated with a cordierite honeycomb carrier (the carrier pore density is 80 holes / square centimeter,...
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Abstract
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