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Heavy metal resistant catalytic cracking adjuvant and process for preparing same

A catalytic cracking additive and anti-heavy metal technology, applied in catalyst activation/preparation, catalytic cracking, metal/metal oxide/metal hydroxide catalyst, etc. Poor stability and other issues

Active Publication Date: 2006-12-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The prior art has enhanced the function of the catalyst to trap heavy metal nickel vanadium to varying degrees, but the common disadvantage is that the prepared additives or poor stability of the catalyst will reduce the effective activity of the main catalyst during use. decrease, which will affect the reaction performance of the main catalyst

Method used

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  • Heavy metal resistant catalytic cracking adjuvant and process for preparing same
  • Heavy metal resistant catalytic cracking adjuvant and process for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add water to 5 kg (dry basis) of Suzhou kaolin with a median diameter of 2.6 μm to make a slurry with a solid content of 38%, add 1400 ml of sodium silicate as an additive, and add 250 g of light magnesia to form kaolin microspheres by spraying. Obtain 3.9 kg of kaolin spray microspheres, which are roasted in a muffle furnace at 980° C. for 3 hours to obtain roasted kaolin microspheres, which contain 10% mullite and have a wear index of 1.0%. Put 500g of calcined microspheres into a stainless steel reactor and mix with NaOH lye in a stirring state, raise the temperature to 90°C and keep the temperature constant for 2 hours, after the extraction, remove the mother liquor by filtration, wash until NaOH 2 O 0.63%, add 37.7g RECl in the washing material 3 The mixed rare earth chloride solution, adjust the pH value with ammonia water, pH = 6.9, temperature 60 ° C, time 30 min, the product is filtered and dried as auxiliary agent A.

Embodiment 2

[0063] Add water to 2kg (dry basis) of Hancheng kaolin with a median diameter of 2.2 μm to make a slurry with a solid content of 42%, add 240g of sodium pyrophosphate as an additive, and add 332g of magnesium chloride, and spray-form it into kaolin microspheres to obtain 1.7 kg of kaolin sprayed microspheres, the sprayed microspheres were roasted in a muffle furnace at 1050° C. for 2 hours to obtain roasted kaolin microspheres, which contained 12% mullite and had a wear index of 0.5%. Put 1500g of calcined microspheres into a stainless steel reactor and mix with NaOH lye in a stirring state, raise the temperature to 70°C and keep the temperature constant for 5 hours, after the extraction, remove the mother liquor by filtration, wash until Na 2 O 0.52%, add 67.9g RECl in the washing material 3 The mixed rare earth chloride solution, adjust the pH value with ammonia water, pH = 8.1, temperature 90 ° C, time 10 min, the product is filtered and dried as auxiliary agent B.

Embodiment 3

[0065] Add water to 4kg (dry basis) of Suzhou kaolin with a median diameter of 2.6 μm to make a slurry with a solid content of 35%, add 160ml of sodium silicate and 70g of sodium carbonate as additives, and add 116g of magnesium hydroxide, and spray into kaolin micro Balls, a total of 2.8kg of kaolin spray microspheres were obtained, and the spray microspheres were roasted in a muffle furnace at 990° C. for 3 hours to obtain roasted kaolin microspheres, which contained 8% mullite and had a wear index of 0.7%. Put 200g of calcined microspheres into a stainless steel reactor and mix with NaOH lye under stirring state, raise the temperature to 80°C and keep the temperature constant for 3 hours. 2 O 0.50%, add 24.2g RECl in the washing material 3 The mixed rare earth chloride solution, adjust the pH value with ammonia water, pH = 8.6, temperature 25 ° C, time 60 min, the product is filtered and dried as auxiliary agent C.

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Abstract

The invention relates to a FCC agent of solid anti-heavy metal and relative preparation, wherein it is characterized in that: the agent comprises Na2O at 0.3-0.8%, Al2O3 at 35-50%, MgO at 1-10% and RE2O3 at 1-10%; said agent has high specific surface and porous volume, stable structure and flexible application; the inventive preparation comprises: using caoline as raw material; when pulping caoline, adding additive and magnesia or its precursor, to be sprayed into micro balls; the micro ball is mainly at 40-80micrometer; the micro ball is baked at 900-1100Deg. C; the baked micro ball via alkali solution is extracted and washed to deposit sodium; processing it with rare earth precursor, to obtain the FCC agent. The invention can improve the reaction activity of FCC base agent.

Description

technical field [0001] The invention is a heavy metal-resistant catalytic cracking additive and a preparation method thereof, which is suitable for a catalytic cracking device with relatively high content of nickel and vanadium in the feed. Background technique [0002] As the world's crude oil is becoming increasingly heavy and inferior, refineries in various countries are vigorously developing fluid catalytic cracking (FCC) technology for blending or fully refining heavy oil and residual oil, in order to broaden the source of FCC feedstock oil and meet the global market's demand for light crude oil. Oil demand, to maximize economic benefits. Compared with conventional FCC feedstock oils (such as AGO and VGO), the content of Ni, V, Fe, Cu and other metals in residual oil or heavy oil is obviously higher, which seriously pollutes FCC catalysts, and the most influential ones are nickel and vanadium, which are deposited on the On the catalyst, the cracking activity of the cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J37/00C10G11/05
Inventor 郑淑琴高雄厚庞新梅段长艳赵连鸿马建刚刘蕴恒陆通
Owner PETROCHINA CO LTD
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