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A low-coking catalytic cracking catalyst and its preparation method

A catalytic cracking, low-coking technology, applied in the direction of catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of underdeveloped pore structure and low B/L acid ratio

Active Publication Date: 2021-05-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although a lot of research work has been carried out on catalyst supports, the existing technology still has the problems of low B / L acid ratio and underdeveloped pore structure.

Method used

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  • A low-coking catalytic cracking catalyst and its preparation method
  • A low-coking catalytic cracking catalyst and its preparation method
  • A low-coking catalytic cracking catalyst and its preparation method

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0036] The technical solutions of the present invention will be further described below through examples.

[0037] 1. Main analysis methods

[0038] Table 1 The main analytical methods involved in the present invention

[0039] project method Standard Code RE 2 o 3 ,m%

XRF method / Na 2 o

XRF method / Pore ​​volume, cm 3 .g -1

water drop method Q / SYLS0521-2002

[0040] 2. Catalyst evaluation:

[0041] The reaction performance was evaluated by ACE device, and the raw oil used was Xinjiang vacuum wide-distillation wax oil and Xinjiang vacuum residue, and the residue ratio was 30%. The properties of raw oil are shown in Table 2. The catalyst was aged at 800°C and 100% steam for 17 hours before evaluation.

[0042] Table 2 Catalyst Selectivity Evaluation Raw Oil Properties

[0043]

[0044]

Embodiment 1

[0046] Si-alumina material preparation

[0047] Take 20.1ml NaY zeolite directing agent and mix with 36ml 250g / l water glass evenly, add water to dilute to SiO 2 The concentration is 60g / L (as SiO 2 (the same below), raise the temperature to 70°C, add 4mol / L hydrochloric acid dropwise under strong stirring until the pH value of the system = 7, and continue aging at constant temperature for 2 hours under stirring; after aging, add 4mol / L hydrochloric acid dropwise to the pH Value = 5, then slowly add 1.6ml 90g / L (A1 2 o 3 After the addition, continue to stir for 1 hour; add ammonia water to adjust the pH to 8, raise the temperature to 85°C, and keep stirring for 1 hour. After the obtained product is filtered and washed, the resulting solid precipitate is ion-exchanged according to ammonium chloride: solid precipitate (dry basis): water = 1:0.3:6 to remove sodium ions, and the exchange is repeated twice, each time for 0.5h After each exchange, wash and filter with water, the...

Embodiment 2

[0056] Si-alumina material preparation

[0057] Take 12.1ml NaY zeolite directing agent and 26.8ml tetraethyl orthosilicate, mix evenly, add water to dilute to SiO 2 The concentration is 40g / L, the temperature is raised to 60°C, and 6mol / L sulfuric acid is added dropwise under strong stirring until the pH value of the system = 8, and the constant temperature aging is continued for 1.5h under stirring; after aging, 6mol / L sulfuric acid is added dropwise to pH value = 4, then slowly add 3.9ml 90g / L aluminum chloride solution under stirring conditions, continue stirring for 2 hours after the addition is complete; add 10wt% sodium hydroxide solution to adjust pH value = 7, raise the temperature to 90 ° C, keep stirring at a constant temperature of 1.5 h. After the obtained product is filtered and washed, the resulting solid precipitate is ion-exchanged according to ammonium nitrate: solid precipitate (dry basis): water = 1:0.5:8 to remove sodium ions, and the exchange is repeated...

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Abstract

The invention discloses a low-coking catalytic cracking catalyst and a preparation method thereof. The catalyst contains medium and macroporous silicon-aluminum materials, and its anhydrous chemical expression is: (0-0.3)Na based on the weight of oxides. 2 O:(2‑18)Al 2 o 3 :(82‑98)SiO 2 ; its pore volume is 0.8‑2mlg ‑1 , the specific surface area is 150‑350m 2 g ‑1 , the most probable pore size is 30-100nm, the B / L acid ratio is 0.8-2.0; the catalyst also contains phosphorus and rare earth modified Y-type molecular sieves, and the molecular sieves contain RE in weight percent 2 o 3 is 0.8-4.0wt%, P is 0.5-5.0wt%, the unit cell is 2.435-2.442nm, and the crystallinity is 45-55%. The catalyst of the invention has the characteristics of high total liquid yield and low coke yield.

Description

technical field [0001] The invention belongs to the field of oil refining catalysts, and in particular relates to a low-coking catalytic cracking catalyst and a preparation method thereof. Background technique [0002] China is the world's largest carbon emitter. On the issue of climate change, China's international pressure will increase day by day. In the course of future economic growth, China's energy consumption will be constrained by carbon dioxide emissions. To develop a low-carbon economy, on the one hand, it is to actively undertake environmental protection responsibilities and meet the requirements of the national energy conservation and consumption reduction targets; on the other hand, it is to adjust the economic structure, improve energy efficiency, develop emerging industries, and build an ecological civilization. China promised at the Copenhagen Conference that by 2020, my country's carbon dioxide emissions per unit of GDP will be reduced by 40%-45% compared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80B01J29/08B01J35/10B01J37/03B01J37/30B01J37/08C10G11/05
CPCB01J29/084B01J29/088B01J29/166B01J29/80B01J35/1019B01J35/1038B01J35/1042B01J35/1047B01J35/1061B01J35/1066B01J37/031B01J37/08B01J37/30C10G11/05C10G2300/1077
Inventor 熊晓云高雄厚张忠东胡清勋黄世英王久江刘宏海高永福孙雪芹侯凯军赵红娟王宝杰田爱珍张莉赵晓争
Owner PETROCHINA CO LTD
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