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Production of cracking catalyst for preventing from heavy metal pollution

A cracking catalyst and anti-heavy metal technology, which is applied in the field of preparation of hydrocarbon cracking catalysts, can solve the problems of large investment and large equipment changes, and achieve the effect of high conversion rate and light oil yield

Active Publication Date: 2006-11-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heavy metal content in its raw materials is less than 10,000ppm nickel equivalent, which cannot meet today's demand
[0007] Three, there is also a passive nickel method, such as US4522704, US4504379 discloses that a special passivation zone is set between the reactor and the regenerator of the catalytic cracking unit, to reduce the impact of polluting metals on the catalyst, due to the equipment made The changes are large and require a lot of investment, so so far, there are no relevant application reports for domestic devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of catalyst provided by the invention comprises:

[0020] (1), preparation of clay slurry

[0021] Mixing the clay, deionized water and optional additives evenly to prepare a clay slurry, the amount of the additives added is 0-3.0% by weight based on the dry weight of the catalyst;

[0022] (2), preparation of molecular sieve slurry

[0023] Mix the molecular sieve, deionized water and optional additives uniformly to prepare a molecular sieve slurry, and the amount of the additive added is 0-1.0% by weight based on the dry weight of the catalyst;

[0024] (3), preparation of binder slurry

[0025] The binder, deionized water, alkaline earth metal compound and rare earth metal compound are uniformly mixed to prepare a binder slurry, and the alkaline earth metal compound and the rare earth metal compound account for 0.05-5 wt. %;

[0026] (4), mixing of slurry

[0027] The above clay slurry, molecular sieve slurry and binder slurry are mixed ev...

Embodiment 1

[0052] Add 1.4 kg of kaolin (dry basis weight, produced by China Kaolin Company) to a solution made of 20 g of sodium polyacrylate (produced by Shandong Heze Chemical Experimental Factory, molecular weight 4,000-10,000) and 1.0 kg of deionized water, and stir for 1.5 hours. A kaolin slurry is formed.

[0053] Take 1.0 kg of pseudo-boehmite (calculated as alumina, produced by Shandong Aluminum Plant), 0.4 kg of aluminum sol (calculated as alumina, produced by Qilu Catalyst Factory), mix them with 4.0 kg of deionized water, and add 91 ml of chlorine rare earth solution (homemade, RE 2 o 3 The concentration is 219 g / L, and the solid rare earth chloride is produced by Inner Mongolia Baotou Rare Earth Plant, RE 2 o 3 Content 46 wt%, RE 2 o 3 Composed of La 2 o 3 53.2% by weight, CeO 2 13.0% by weight, Pr 6 o 11 13.0% by weight, Nd 2 o 3 20.8% by weight, the same below) and 771 grams of MgCl 2 ·6H 2 In the aqueous solution of O (chemically pure, produced by Beijing Ch...

Embodiment 2

[0076] Add 1.3 kg of kaolin to a solution made of 20 g of sodium pyrophosphate (chemically pure, produced by Beijing Chemical Reagent Company) and 1.5 kg of deionized water, and stir for 1.5 hours to form a kaolin slurry.

[0077] Take 1.2 kg of pseudo-boehmite, 0.2 kg of aluminum sol, mix with 3.0 kg of deionized water, add 18 ml of rare earth chloride solution and 147 g of CaCl 2 2H 2 In the aqueous solution of O (chemically pure, produced by Beijing Chemical Reagent Company), add 140 milliliters of 36% by weight hydrochloric acid and mix and stir for 1.5 hours to complete the acidification process.

[0078] Take 1.2 kg of DASY 2.0 Molecular sieve (a REUSY zeolite, RE 2 o 3 Content 1.5 wt%, Na 2 The O content is 1.2% by weight, the silicon-aluminum ratio is 6.8 (produced by Qilu Catalyst Factory, the same below) and 1.5 kg of deionized water added with 15 g of sodium polyacrylate are mixed uniformly to obtain a molecular sieve slurry.

[0079] The above three slurries w...

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Abstract

It is a preparation method of cracking catalyst which can resist heavy metal pollution. Making clay, de-ionized water and optional additive well blended to get clay slurry. Making molecular screen de-ionized water and optional additive well blended to get molecular screen slurry. Making agglomerant, de-ionized water, alkali soil metal compound, rare earth compound and optional inorganic acid well blended to get agglomerant slurry. Uniform mixing three kinds of slurry mentioned before, and then drying the mixture. This kind of cracking catalyst has good resistivity to nickel and vanadium, and even when there is a high level of nickel in the catalyst, the cracking catalyst can work well.

Description

technical field [0001] The invention belongs to a preparation method of a hydrocarbon cracking catalyst. technical background [0002] Due to national conditions, most of my country's refineries have limited choice of raw material oils. For example, crude oil produced in Daqing, Shengli, Liaohe and other oil fields have encountered raw material oils with high nickel content. The nickel content has reached more than 15,000ppm. However, metal pollutants such as nickel, vanadium, iron, and copper contained in slagging crude oil will deposit on the surface of the catalyst, causing catalyst poisoning and deactivation, resulting in poor selectivity, reduced yield of light oil, and hydrogen and coke production. rate rises. [0003] Due to the limited hydrofining capacity of the refinery, it is far from meeting the needs of actual production, resulting in a high content of the above-mentioned heavy metals in the feed to the catalytic cracking (FCC) unit, an...

Claims

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Application Information

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IPC IPC(8): C10G11/08
Inventor 邱中红田辉平陆友宝朱玉霞龙军达志坚张久顺李才英张万虹王振波
Owner CHINA PETROLEUM & CHEM CORP
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