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Preparation method of metal modified Y type molecular sieve

A metal modification, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, catalytic cracking and other directions, to achieve the effects of improving liquid yield, gasoline yield, and liquefied gas yield

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method for preparing a metal-modified Y-type molecular sieve with high hydrothermal stability in view of the problems existing in the existing metal-modified Y-type molecular sieves

Method used

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  • Preparation method of metal modified Y type molecular sieve
  • Preparation method of metal modified Y type molecular sieve
  • Preparation method of metal modified Y type molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] At room temperature, take 150g (dry basis) DASY (0.0) molecular sieve, mix it with 1500ml hydrochloric acid solution with a molar concentration of 1.0mol / L, stir for 30 minutes, filter, wash with 1500ml deionized water, and obtain Y molecular sieve after acid treatment. The sodium oxide content is 0.6% by weight; the Y molecular sieve obtained after the acid treatment is roasted at 300°C for 3 hours to obtain a molecular sieve with a solid content of 97% by weight, which is designated as FZ-1;

[0028] Get 12ml ethanol and add 180ml deionized water, add 5mol / L acetic acid aqueous solution 3ml, adjust solution pH value to 3.7 with 10mol / L ammonium hydroxide aqueous solution, then 30.4g Fe(NO 3 ) 3 9H 2 O was dissolved in the above buffer solution to obtain an impregnating liquid, and the above FZ-1 molecular sieve was mixed with the impregnating liquid evenly, left to stand for 12 hours, dried and roasted at 650°C and 100% water vapor for 2 hours to obtain the present i...

Embodiment 2

[0030] At room temperature, take 200g NaY molecular sieves (dry basis 75% by weight), mix them with 1500ml of hydrochloric acid solution with a molar concentration of 0.5mol / L, stir for 30 minutes, filter, and wash with 1500ml deionized water to obtain NaY molecular sieves after acid treatment. The content of sodium oxide is 1.5% by weight; the obtained NaY molecular sieve after acid treatment is roasted at 300°C for 3 hours to obtain a molecular sieve with a solid content of 96% by weight (water content 4% by weight), which is designated as FZ-2;

[0031] Get 12ml ethanol and add 180ml deionized water, add 5mol / L acetic acid aqueous solution 3ml, adjust solution pH value to 4.5 with 10mol / L ammonia water, obtain buffer solution, 37.6g Cr(NO 3 ) 3 9H 2 O is dissolved in the above buffer solution to obtain an impregnating liquid, and the above molecular sieve FZ-2 is mixed evenly with the impregnating liquid, left to stand for 12 hours, dried and roasted at 500°C and 100% wate...

Embodiment 3

[0033] Take 200g NaY molecular sieve (same as above), beat with 1500g of deionized water, add 45g of ammonium chloride and 33.5ml of RECl 3 solution (the concentration is 270g / L in terms of RE2O3), rare earth salts (in terms of RE 2 o 3 Calculated): ammonium salt: NaY molecular sieve: deionized water with a weight ratio of 0.06:0.3:1:10, adjust the pH value of the slurry to 3.8, heat up to 80°C for 2 hours, filter and rinse with water, and then filter the cake Baking at 600°C and 100% steam for 2 hours. The molecular sieve after roasting is mixed with the sulfuric acid solution 1500ml that the molar concentration is 0.2mol / L, stirs 30 minutes, filters, washes with 1500ml deionized water, obtains the Y molecular sieve after the acid treatment, and its sodium oxide content is 1.2% by weight; The resulting acid-treated Y molecular sieve was calcined at 350°C for 3 hours to obtain a molecular sieve with a solid content of 97% by weight, denoted as FZ-3;

[0034] Get 12ml ethano...

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Abstract

The invention discloses a preparation method of a metal modified Y type molecular sieve. The preparation method comprises the following steps: (1) treating the Y type molecular sieve with an acid solution; (2) dehydrating the treated Y type molecular sieve; (3) then dissolving a compound of modified metal elements in a buffer solution of ethyl alcohol-ammonium acetate-water so as to prepare impregnation liquid, mixing and impregnating the impregnation liquid and the molecular sieve obtained in the step (1), and calcining. Wherein modified metal is one or more of Fe, Cr, Ga, In, Tl, Sn and Co. The metal modified Y type molecular sieve obtained by the method is high in hydrothermal stability, and the productive rate for gasoline by cracking hydrocarbon oil is high.

Description

technical field [0001] The invention relates to a method for preparing a metal-modified Y-type molecular sieve, and more particularly relates to a method for preparing a metal-modified Y-type molecular sieve with high hydrothermal stability. Background technique [0002] At present, the research on metal modified molecular sieves mainly focuses on ZSM-, MCM-, TS-series and other high silicon molecular sieves. The synthesis of these metal-modified molecular sieves mostly adopts the hydrothermal synthesis method, that is, the corresponding metal compounds are added to the synthesis system during the conventional hydrothermal synthesis of molecular sieves. At present, metal-modified molecular sieves can be introduced into modified metals by hydrothermal synthesis or by hydrothermal synthesis of silica-alumina molecular sieves and then by post-modification. For example, the pH value of the ZSM-5 molecular sieve synthesis system is low, and metal heteroatoms can exist stably in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J29/08C10G11/05
Inventor 于善青田辉平王振波
Owner CHINA PETROLEUM & CHEM CORP
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