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Catalytic cracking fluid bed catalyst containing molecular sieve

A fluidized bed catalyst and catalytic cracking technology, which is applied in molecular sieve catalysts, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of poor selectivity, high reaction temperature, and low activity of catalysts at low temperatures, and achieve good catalytic cracking and high The effect of ethylene propylene yield and good technical effect

Active Publication Date: 2007-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the problem of high reaction temperature, low catalyst activity at low temperature and poor selectivity in the production of ethylene and propylene by catalytic cracking in the prior art, and a new catalytic cracking fluidized bed catalyst containing molecular sieves is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 2 grams of ammonium nitrate are dissolved in 100 milliliters of water, put into 20 grams of ZSM-5 molecular sieves (silicon aluminum molar ratio SiO 2 / Al 2 o 3 It is 400) original powder. After exchange at 90°C for 2 hours, filter to obtain a filter cake.

[0030] Get ferric nitrate 16.2 grams, cobalt nitrate 7.86 grams, chromium nitrate 12.23 grams, lanthanum nitrate 2.4 grams they are dissolved in 250 milliliters of water together, obtain solution A. Dissolve 4.65 g of diammonium hydrogen phosphate in 100 ml of water, pour it into solution A, and stir evenly to obtain slurry B.

[0031] Heat the slurry B on a water bath at 70-80°C, add the above-mentioned exchanged molecular sieves, reflux for 5 hours, and dry the slurry with a spray drying device.

[0032] The dried powder was placed in a muffle furnace and heated to 740°C for 5 hours. The catalyst is obtained after cooling, and then the catalyst is passed through a 100-mesh sieve.

[0033] The catalyst chemic...

Embodiment 2

[0037] 2 grams of ammonium nitrate are dissolved in 100 milliliters of water, put into 20 grams of Y molecular sieves (silicon aluminum molar ratio SiO 2 / Al 2 o 3 For 20) former powder. After exchange at 90°C for 2 hours, filter to obtain a filter cake.

[0038] Take 7.27 grams of nickel nitrate, 8.48 grams of chromium nitrate, and 5.44 grams of cerium nitrate, and dissolve them in 250 milliliters of water to obtain solution A. Dissolve 6.54 g of diammonium hydrogen phosphate in 100 ml of water, pour it into solution A, stir evenly, and obtain slurry B.

[0039] Put the molecular sieve that has been exchanged into the slurry B, and others are the same as in Example 1, and the catalyst chemical formula obtained is:

[0040] Ni0.07 Cr 0.06 Ce 0.09 P 0.08 o x +ZSM-5 molecular sieve 41.9%

[0041] Catalyst evaluation is the same as in Example 1, and the cracked product distribution and diene yield are shown in Table 3.

[0042] product

Embodiment 3

[0044] 2 grams of ammonium nitrate are dissolved in 100 milliliters of water, put into 20 grams of ZSM-5 molecular sieves (silicon aluminum molar ratio SiO 2 / Al 2 o 3 It is 120) former powder. After exchange at 90°C for 2 hours, filter to obtain a filter cake.

[0045] Take 5.49 grams of cobalt nitrate, 5.60 grams of zinc nitrate, 5.44 grams of cerium nitrate, and 6.30 grams of copper nitrate, and dissolve them in 250 ml of water to obtain solution A. Dissolve 6.54 g of diammonium hydrogen phosphate in 100 ml of water, pour it into solution A, stir evenly, and obtain slurry B.

[0046] The molecular sieves that have been exchanged are put into the slurry B, and the others are the same as in Example 1.

[0047] The chemical formula of the catalyst is: Co 0.06 Zn 0.06 Cu 0.08 Ce 0.09 P 0.08 o x +ZSM-5 molecular sieve 40.5% by weight

[0048] Product yields are shown in Table 4.

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PUM

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Abstract

A fluidized-bed catalyst containing molecular sieve for preparing ethene or propene from petroleum naphtha is composed of the molecular sieve as carrier and AaBbPcOx as active component. It has low reaction temp and high activity and selectivity.

Description

technical field [0001] The invention relates to a catalytic cracking fluidized bed catalyst containing molecular sieves, in particular to a fluidized bed catalyst containing molecular sieves for preparing ethylene propylene from naphtha catalytic cracking. Background technique [0002] At present, the most important method of producing ethylene propylene is steam thermal cracking. The most used raw material is naphtha. However, steam thermal cracking of naphtha has the disadvantages of high reaction temperature, harsh process conditions, high requirements for equipment, especially furnace tube materials, and large losses. For this reason, people have carried out various meaningful researches, among which catalytic cracking is the most attractive and promising one. The goal is to find a suitable cracking catalyst, improve the selectivity of ethylene propylene, reduce the reaction temperature, and at the same time have certain flexibility in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05C07C4/06C07C4/10C07C11/04C07C11/06C07C5/32
CPCB01J29/166C10G11/18B01J29/7676B01J29/80B01J35/0006B01J2229/42B01J29/7615C10G2400/20B01J27/188B01J37/031B01J29/46B01J29/084B01J29/40C10G11/05B01J27/187B01J37/0045B01J29/48B01J27/1853B01J35/19B01J27/185B01J23/70B01J23/10C10G11/04
Inventor 谢在库姚晖马广伟肖景娴陈亮杨为民
Owner CHINA PETROLEUM & CHEM CORP
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