Catalytic cracking co-catalyst for producing diesel oil and its preparing method

A co-catalyst and catalytic cracking technology, which is applied in catalytic cracking, cracking, petroleum industry and other directions, can solve the problems of insufficient ability to increase diesel production, use, and cannot be used as a diesel auxiliary agent, etc., to increase the production of diesel components, increase dry gas production, The effect of total liquid recovery unchanged

Inactive Publication Date: 2005-10-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Patents US3367886, US3367887, and US3663165 proposed a process for preparing all-clay catalysts by in-situ crystallization of kaolin at a temperature above 900°C. The molecular sieve content is 20-30%. The FCC catalysts prepared by this process have good catalytic cracking performance and stable activity and anti-heavy metal pollution ability, but the ability to increase the production of diesel is insufficient, so it cannot be used as a diesel additive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of in-situ crystallization product microspheres:

[0040] Add water to 10Kg (dry basis) kaolin produced in Suzhou to make a slurry with a solid content of 35%, and add 2% sodium silicate as a dispersant or binder, and spray to obtain 8.5Kg of spray microspheres. The sprayed microspheres were roasted in a muffle furnace at 920° C. for 3 hours to obtain roasted microspheres, which contained about 8% mullite. Sodium silicate (containing 19.84% SiO 2 , 6.98% Na 2 (2) 452mL, sodium hydroxide solution (containing 14% NaOH) 756mL, guiding agent (containing 11.65% SiO 2 , 1.32% Al 2 o 3 , 12.89% Na 2 (0) 97 mL, 57 mL of deionized water, and 1000 g of calcined microspheres were put into a stainless steel reactor, heated to 90° C. and crystallized at a constant temperature for 24 hours. After the crystallization is completed, the mother liquor is removed by filtration, and the filter cake is washed and dried to obtain crystallized product microspheres. As d...

Embodiment 2

[0050] (1) Preparation of crystallization product microspheres:

[0051] All the reaction materials are the same as in Example 1, wherein the roasting conditions of the sprayed microspheres are 1040°C and 0.5 hours, and 2000 mL of sodium silicate, 4052 mL of sodium hydroxide solution, 485 mL of directing agent, and 5000 g of roasted microspheres are put into the stainless steel reactor in turn under stirring. , the temperature was raised to 92°C and crystallized at constant temperature for 20 hours. X-ray diffraction determined that the crystallized product contained 18% NaY zeolite, and the zeolite silicon-aluminum ratio was 4.94.

[0052] (2) Post-treatment of in-situ crystallization products to prepare co-catalysts:

[0053] Ammonium salt primary exchange: add deionized water 2.5Kg in the stainless steel kettle, drop into in situ crystallization product 500g and ammonium nitrate 250g [ammonium nitrate / crystallization product (mass ratio)=0.20] prepared by the above-mention...

Embodiment 3

[0061] (1) Preparation of crystallization product microspheres:

[0062] All reaction raw materials are the same as in Example 1, wherein the roasting conditions of sprayed microspheres are 980°C and 2 hours, and 400 mL of sodium silicate, 600 mL of sodium hydroxide solution, 88 mL of directing agent, and 1000 g of roasted microspheres are put into the glass reactor in turn under stirring. , after crystallization at 95° C. for 32 hours, it was determined that the crystallized product contained 8% NaY zeolite, and the zeolite silicon-aluminum ratio was 5.54.

[0063] (2) Post-treatment of in-situ crystallization products to prepare co-catalysts:

[0064] One exchange of ammonium salt: add 4 kg of deionized water in a stainless steel kettle, drop into 800 g of in-situ crystallization product prepared by the above method and 240 g of ammonium sulfate [ammonium sulfate / crystallization product (mass ratio)=0.30] under stirring, at pH =3.0~3.5, exchange at 90°C for 1 hour, remove t...

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PUM

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Abstract

The catalytic cracking co-catalyst for increasing diesel oil yield is prepared through roasting kaolin at over 900 deg.c for in-situ crystallization. The co-catalyst contains type-Y zeolite in 5-20 wt%, as well as magnesia 0.5-3 wt%, RE oxide 0.5-5 wt%, and sodium oxide less than 0.6 wt%, and the zeolite has Si/Al ratio of 4.0-6.0. Adding certain amount of the catalytic cracking co-catalyst without altering the main catalyst in the oil refining apparatus can raise diesel oil yield of FCC catalyzed apparatus, improve product distribution, raise available catalyst utilization, and improve the activity stability of the catalyst system and heavy metal resistance.

Description

technical field [0001] The invention relates to a catalytic cracking co-catalyst with the function of increasing diesel oil production and a preparation method thereof. More specifically, it is a kind of prolific diesel fuel FCC fuel with strong anti-heavy metal ability and good activity and stability prepared by using kaolin as the main raw material through a combination of special in-situ crystallization process and chemical element modification. agent and its preparation method. The additive can be used in combination with various existing catalysts, and under the existing conditions, it can improve the ability of the catalytic cracking refinery to increase diesel oil production and improve product distribution. Background technique [0002] In recent years, the rapid development of diesel vehicles in the world has led to a rapid increase in the demand for diesel. Since the diesel produced by catalytic cracking accounts for 40% of the total diesel production in refineri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 高雄厚刘宏海段长艳庞新梅郑淑琴王宝杰张莉孙艳波张艳慧
Owner PETROCHINA CO LTD
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