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Light oil type hydrocracking catalyst with composite molecular sieve as well as preparation method and application thereof

A composite molecular sieve and hydrocracking technology, which is applied in the field of hydrocracking catalyst and its preparation, can solve the problem of low catalyst activity and achieve high catalytic cracking performance, enhanced hydrophobicity, and outstanding isomerization performance

Active Publication Date: 2015-06-17
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by this technology has high light oil selectivity and nitrogen resistance, and the activity of the catalyst is not very high

Method used

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  • Light oil type hydrocracking catalyst with composite molecular sieve as well as preparation method and application thereof
  • Light oil type hydrocracking catalyst with composite molecular sieve as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The commercially available NaY molecular sieve (relative crystallinity 90%, unit cell constant 2.470nm, SiO 2 / Al 2 o 3 Molar ratio is 5.1, Na 2 The O content is 10.9wt%, the following examples and comparative examples are the same) mixed with the ammonium nitrate solution with a concentration of 2.0mol / L, the liquid-solid weight ratio is 10, the temperature is raised to 95°C, ion exchange is carried out under stirring for 1.5 hours, and the Remove the mother liquor, repeat the exchange once, filter and wash to obtain Na 2 NH with an O content of 2.9 wt% 4 NaY molecular sieve sample;

[0031] (2) Weigh 500 grams (dry basis) NH 4 NaY molecular sieves were placed in a three-necked flask, and 1M NH 4NO 3 2.5 liters, stirred and heated to 98 ° C, and then at a speed of 7.25 ml / min (NH 4 ) 2 SiF 6 Add 870ml of the aqueous solution into the three-necked flask, and continue to stir and react for 1 hour after the addition. Then stop stirring, let it stand for 10 ...

Embodiment 2

[0035] Take 100 grams of commercially available NaY molecular sieves and exchange them with 800ml of 1.5N ammonium nitrate solution at 90°C for 1.5 hours, filter off the mother liquor, repeat the exchange once, wash the filter cake with deionized water, put it back into the exchange tank and use 1.5N ammonium nitrate solution 800ml of ammonium nitrate solution was beaten, heated up to 95°C, and 1.2M (NH 4 ) 2 SiF 6 Add 150ml of aqueous solution into the exchange tank at a constant speed for 1.5 hours, then continue to react for 1.5 hours, stop stirring, let stand for 5 minutes, export the upper molecular sieve slurry, filter, wash, and dry to a moisture content of 15%; the sample is placed in a hydrothermal treatment furnace , the temperature of the control system is 580°C, the water vapor pressure is 0.08MPa, and the hydrothermal treatment is 2.0 hours; the sample is exchanged with 0.8 liters of 1.0N ammonium chloride solution (adjusted to pH=2.8 with hydrochloric acid) at 9...

Embodiment 3

[0037] Take SiO 2 / Al 2 o 3 300 g of HZSM-23 molecular sieve with a molar ratio of 60 was placed in a hydrothermal treatment furnace, the temperature of the control system was 500 ° C, the water vapor pressure was 0.05 MPa, and the hydrothermal treatment was carried out for 1.0 hour to obtain modified ZSM-23 molecular sieve A2. The physical and chemical properties are listed in Table 1.

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Abstract

The invention discloses a light oil type hydrocracking catalyst with a composite molecular sieve. The hydrocracking catalyst comprises the composite molecular sieve consisting of a modified Y-molecular sieve and a modified ZSM-23 molecular sieve, a carrier composed of micropore aluminum oxides, and a hydrogenation activity component composed of a VIB group metal and a VIII group metal. The hydrocracking catalyst is characterized in that the composite molecular sieve comprises the modified Y-molecular sieve and the modified ZSM-23 molecular sieve, and the Y-molecular sieve is modified and dealuminized, so that heat stability and hydrothermal stability are stably enhanced, the hydrophobicity is enhanced, the absorption and desorption properties of the molecular sieve are improved, and the catalyst achieves a high catalytic cracking property. The pore passages of the modified SM-23 molecular sieve are unobstructed, the number of the acid sites is small, the isomerism property is outstanding, and the octane value of the molecular sieve is increased because of light naphtha components. The modified Y-molecular sieve and the modified ZSM-23 molecular sieve are mixed and used according to a formula ratio of the hydrocracking catalyst, so that both the cracking activity and the isomerism property are considered, and the final catalyst achieves an ideal catalytic effect.

Description

technical field [0001] The present invention relates to a hydrocracking catalyst and its preparation method and application, in particular to a light oil hydrocracking catalyst containing composite molecular sieves suitable for the hydrocracking process of producing light distillate oil and its preparation method and application. Background technique [0002] At present, the world's oil resources are becoming more and more tense, and the crude oil produced by existing oil fields has also become heavier and worse. With the development of society, people's demand for light fuel oil is increasing day by day, and the environment's requirements for fuel oil are becoming increasingly stringent. The quantity and quality of the primary processing of petroleum cannot meet people's needs. The conversion of heavy distillate oil into high-quality light fuel through secondary processing of petroleum not only makes full use of limited petroleum resources, but also alleviates the burden o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G47/20
Inventor 齐邦峰甘为民孟繁梅
Owner CHINA NAT OFFSHORE OIL CORP
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