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Beta molecular sieve containing phosphorus and loading metal, and preparation method thereof

A technology of loading metals and molecular sieves, applied in the direction of molecular sieve catalysts, chemical instruments and methods, molecular sieves and base exchange compounds, etc., can solve problems affecting product distribution, etc., and achieve the effect of increasing conversion rate, increasing yield, and improving accessibility

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shape-selective effect of molecular sieves, when the kinetic size of the reactant molecules exceeds the pore size of the microporous molecular sieve, the reactant molecules cannot diffuse into the interior of the molecular sieve; Selective reactions, affecting product distribution

Method used

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  • Beta molecular sieve containing phosphorus and loading metal, and preparation method thereof
  • Beta molecular sieve containing phosphorus and loading metal, and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a method for preparing the phosphorus-containing and metal-loaded Beta molecular sieve provided by the present invention, the preparation method comprising: a, carrying out alkali treatment on the sodium-type Beta molecular sieve in an alkaline solution, and filtering and washing Finally, the alkali-treated molecular sieve is obtained; b, the alkali-treated molecular sieve obtained in step a is dealuminated in a complex acid dealumination agent solution composed of fluosilicic acid, organic acid and inorganic acid, and after filtering and washing, the obtained Dealuminated molecular sieve; c. After the dealuminated molecular sieve obtained in step b is subjected to phosphorus modification treatment, metal-loaded loading treatment and roasting treatment, the phosphorus-containing and metal-loaded Beta molecular sieve is obtained.

[0034] According to the present invention, the sodium-type Beta molecular sieve is well known to those ski...

Embodiment approach

[0039] A specific implementation manner, the phosphorus modification treatment and the loading treatment of the loaded metal can adopt the following three methods:

[0040] 1. The dealuminated molecular sieve and the calculated amount of phosphorus-containing compound aqueous solution are beaten and dried at room temperature to 95°C, and then roasted at 400-800°C, and then mixed with the calculated amount of Fe, Co, Ni, Cu, Mn, The aqueous solution of one of Zn and Sn compounds is uniformly mixed and dried at room temperature to 95°C.

[0041] 2. The dealuminated molecular sieve and the calculated amount of aqueous solution of phosphorus-containing compounds are beaten and dried at room temperature to 95°C, and then mixed with the calculated amount of aqueous solution of compounds containing one of Fe, Co, Ni, Cu, Mn, Zn, and Sn at room temperature. Mix and dry evenly at 95°C, and the order of impregnating the above two solutions can also be reversed;

[0042] 3. The mixed aq...

Embodiment 1

[0062] With 100gBeta molecular sieve (catalyst Qilu branch production, SiO 2 / Al 2 o 3 =25, the sodium oxide content is 4.5% by weight, the same below; dry basis mass) is added with water and beaten to obtain a molecular sieve slurry with a solid content of 10% by weight, and 11.43g of high alkali sodium metaaluminate solution (Na 2 O is 297g / L, Al 2 o 3 was 41g / L, solution density was 1.353g / mL), heated to 50°C and stirred at constant temperature for 0.5h, filtered and washed until neutral; the filter cake was beaten with water to obtain a molecular sieve slurry with a solid content of 20% by weight, and 5.3g Oxalic acid, then slowly add 51g hydrochloric acid (mass fraction 10%) and 17g fluosilicic acid (concentration 20%) dropwise at the same time, raise the temperature to 50°C and stir at a constant temperature for 1h, filter, wash and dry to obtain a filter cake; add water to beat the filter cake to obtain a solid content of 40 wt% molecular sieve slurry, 7.8gH 3 PO ...

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Abstract

The invention discloses a Beta molecular sieve containing phosphorus and loading metal, and a preparation method thereof. According to the invention, the distribution parameter D of Al in the molecular sieve is no less than 0.4 and no more than 0.8; the micropore specific area of the molecular sieve is 420 to 520 m<2> / g; the mesopore volume of the molecular sieve accounts for 30 to 70% of total pore volume; the amount of strong acids in the molecular sieve accounts for 65 to 80% of total acid amount; a ratio of the amount of the acid B to the amount of the acid L is 25 to 90; the phosphorus content of the molecular sieve is 0.3 to 10.0 wt% in terms of P<2>O<5> and on the basis of the dry base weight of the molecular sieve; and the content of the loading metal in the molecular sieve is 0.5to 10.0 wt% in terms of the oxide of the loading metal and on the basis of the dry base weight of the molecular sieve. A catalyst prepared with the Beta molecular sieve as an active component can improve the conversion rate of middle distillate and the yield of low carbon olefins when applied to catalytic cracking.

Description

technical field [0001] The invention relates to a Beta molecular sieve containing phosphorus and loaded metal and a preparation method thereof. Background technique [0002] In 1967, Wadlinger et al. of Mobile Company used sodium aluminate, silica gel, tetraethylammonium hydroxide (TEAOH) and water for mixed crystallization to synthesize Beta molecular sieve (beta molecular sieve). Beta molecular sieve has the characteristics of high silicon-aluminum ratio, and Si-Al has a wider modulation range. Marens et al. used decane as a probe reaction to reveal the 12-membered ring skeleton structure of Beta molecular sieves; in 1988, Newsam and Higgins et al. used structural models and simulated powder diffraction to determine the stacking fault structure of Beta molecular sieves for the first time. Beta molecular sieve has a twelve-membered ring intersecting channel structure, the twelve-membered ring pore diameter of the one-dimensional channel parallel to the (001) crystal plane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02B01J29/72
CPCB01J29/7215B01J29/7815C01B39/026C01P2006/12C01P2006/14C01P2006/16C01P2006/17
Inventor 欧阳颖庄立刘建强罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP