Preparation method of catalyst for deeply desorbing trace olefins in aromatic hydrocarbon
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A catalyst and removal technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as kaolin treatment, and achieve the effects of low cost and simple process
Active Publication Date: 2011-04-06
CHINA NAT OFFSHORE OIL CORP +2
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[0010] CN1618932A discloses a refining method for reforming aromatic oil, the binder
Method used
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Examples
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Embodiment 1
[0041] Add 1000 grams of deionized water, 80 grams of Y molecular sieves, and 20 grams of attapulgite in the beaker successively, add 23 grams of citric acid after mixing, after mixing and beating for 0.5 hours, add 15% (mass concentration, The same below) adjust the pH value to 3 with sulfuric acid, raise the temperature to 80°C, and continue beating for 3 hours;
[0042] Cool the mixed slurry to filter, wash, and dry, add 2.7 grams of scallop powder, mix evenly, and extrude into Φ3 strips;
[0043] The above catalyst was calcined at 450° C. for 4 hours to obtain catalyst A2.
Embodiment 2
[0045] Add 1000 grams of deionized water, 80 grams of Y molecular sieve, and 20 grams of kaolin successively in the beaker, add 23 grams of citric acid after mixing, mix and beat for 0.5 hours, add 15% sulfuric acid in 0.5 hours to adjust the pH value to 3. Heat up to 80°C and continue beating for 3 hours;
[0046] Cool the mixed slurry to filter, wash, and dry, add 2.7 grams of scallop powder, mix evenly, and extrude into Φ3 strips;
[0047] The above catalyst was calcined at 450° C. for 4 hours to obtain catalyst A3.
Embodiment 3
[0049] Add 1000 grams of deionized water, 80 grams of Y molecular sieve, and 20 grams of diatomaceous earth in the beaker in sequence, and then add 23 grams of citric acid after mixing. After mixing and beating for 0.5 hours, add 15% sulfuric acid to adjust the pH within 0.5 hours. When the value reaches 3, heat up to 80°C and continue beating for 3 hours;
[0050] Cool the mixed slurry to filter, wash, and dry, add 2.7 grams of scallop powder, mix evenly, and extrude into Φ3 strips;
[0051] The above catalyst was calcined at 450° C. for 4 hours to obtain catalyst A4.
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Abstract
The invention discloses a preparation method of a catalyst for deeply desorbing trace olefins in aromatic hydrocarbon. The preparation method is characterized in that the catalyst comprises 50-90 percent by mass of active component and 50-10 percent by mass of caking agent component, wherein the active component is M, MCM-22 and SAPO series containing modified metals or not, X, Y, USY, beta, ZSM series molecular sieves; and the caking agent component is acidized natural porous clay. The preparation method comprises the following process steps of: (1) mixing the molecular sieves with the natural porous clay, adding a proper amount of deionized water and uniformly beating; (2) adding a proper amount of inorganic acid or organic acid, stirring and heating up to 60-140DEG C, treating for 0.5-5 hours, filtering, washing and drying; (3) adding the dried mixture in less than 5 percent of extrusion aid, reaming agent or strength additive; and after adding the modified compound, forming by extrusion or rolling; and (4) drying the formed catalyst and roasting the formed catalyst at the temperature of 300-700DEG C for 1-9 hours.
Description
technical field [0001] The invention provides a preparation method for a catalyst for deep removal of trace olefins in aromatics, in particular, a catalyst suitable for deep removal of trace olefins from reformed oil, pyrolysis gasoline, and linear alkylbenzene method of preparation. More specifically, the number of carbon atoms in the raw aromatic hydrocarbon is 6-20. Background technique [0002] Olefinic impurities are commonly found in naphtha cracking or reforming reaction products. In addition, olefinic impurities are also commonly found in aromatic hydrocarbon alkylation or isomerization products, such as the synthesis of linear alkylbenzene (LAB). The removal of these olefins is very necessary. One is the product’s requirement for the purity of olefin impurities. If these olefins are not removed, there will be a great possibility to react with aromatics to reduce the product grade, such as the formation of colored substances such as benzene sulfonate, etc.; the se...
Claims
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Application Information
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