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Preparation method of inferior/heavy diesel hydrocracking catalyst

A hydrocracking and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as uneven mixing and affect component performance, and achieve low BMCI value, high aromatic potential, The effect of high hydrogenation selectivity

Active Publication Date: 2019-09-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst prepared by this method will affect the performance of each component due to the uneven mixing of various raw materials

Method used

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  • Preparation method of inferior/heavy diesel hydrocracking catalyst
  • Preparation method of inferior/heavy diesel hydrocracking catalyst
  • Preparation method of inferior/heavy diesel hydrocracking catalyst

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preparation example Construction

[0055] The preparation of the modified Y molecular sieve comprises the following steps: the modified Y molecular sieve is obtained through ammonium exchange, the first hydrothermal treatment, acid modification and the second hydrothermal treatment in sequence with a common commercially available NaY molecular sieve. Its specific preparation method is as follows:

[0056] (1) Ammonium exchange, NaY former powder ammonium exchange 3 times in the inventive method, ammonium exchange temperature 80~110 ℃, preferably 85~95 ℃, ammonium salt used is one or more of ammonium chloride, ammonium nitrate, ammonium sulfate species, preferably ammonium chloride, the ammonium salt concentration used is 0.1-2.0 mol / L, preferably 0.5-1.0 mol / L, the ammonium exchange liquid-solid mass ratio is 5:1-30:1, preferably 10:1-20:1, The ammonium exchange time is 0.5 to 3 hours, preferably 1 to 2 hours.

[0057] (2) Hydrothermal treatment, Y molecular sieve hydrothermal treatment 3 times in the present ...

Embodiment 1

[0059] Preparation of modified Y molecular sieve

[0060] (1) The commercially available NaY molecular sieve (silicon-aluminum ratio 4.2:1, Na 2 The O content is 12.5wt%, the packet constant is 2.468nm, and the relative crystallinity is 96%) mixed with ammonium chloride solution whose concentration is 0.5mol / L, the liquid-solid weight ratio is 10:1, the temperature is raised to 85°C, and ionization is carried out under stirring. Exchange for 1.0 hour, filter off the mother liquor, repeat washing with water 3 times, and filter with suction. Repeat the above process 3 times, filter and wash to obtain NH 4 Y molecular sieve.

[0061] (2) NH in step (1) 4 Y molecular sieves are treated under hydrothermal conditions. The hydrothermal treatment temperature is 550°C, the hydrothermal treatment time is 1.0 hour, the hydrothermal treatment pressure is 0.1MPa, and the water injection rate is 100ml / h. After the first hydrothermal treatment is completed, repeat step (1) for ammonium ...

Embodiment 2

[0063] Preparation of modified Y molecular sieve

[0064] (1) The commercially available NaY molecular sieve (silicon-aluminum ratio 4.2:1, Na 2 O content 12.5wt%, crystal bag constant 2.468nm, relative crystallinity 96%) is mixed with the ammonium chloride solution that concentration is 1.0mol / L, and the liquid-solid weight ratio is 20:1, is heated up to 95 ℃, carries out ionization under stirring Exchange for 2.0 hours, filter off the mother liquor, repeat washing with water 3 times, and filter with suction. Repeat the above process 3 times, filter and wash to obtain NH 4 Y molecular sieve.

[0065] (2) NH in step (1) 4 Y molecular sieves are treated under hydrothermal conditions. The hydrothermal treatment temperature is 650°C, the hydrothermal treatment time is 2.0 hours, the hydrothermal treatment pressure is 0.3MPa, and the water injection rate is 400ml / h. After the first hydrothermal treatment is completed, repeat step (1) for ammonium exchange, and then repeat the...

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Abstract

The invention discloses a white carbon black modified hydrocracking catalyst and a preparation method thereof. In the hydrocracking catalyst disclosed by the invention, a Y molecular sieve is used for acid cracking of components; the metal salts of groups VIB and VIII are adopted as hydrogenation components; white carbon black serves as a binder matrix; a finished product of the catalyst is prepared by combining kneading and impregnation. According to the experimental result, the white carbon black can perfectly reduce interaction between the metal components and the carrier. The catalyst is applied to the hydrocracking of inferior / heavy diesel to produce naphtha; moreover, apart from relatively high hydrogenation selectivity, the catalyst has the characteristics of high aromatic potential in heavy naphtha, low BMCI in tail gas and high yield of C5+ liquid.

Description

technical field [0001] The invention relates to a method for preparing a hydrocracking catalyst, in particular, adding white carbon black is used to weaken the interaction force between the catalyst carrier and the metal, and improve the hydrogenation activity and hydrogenation selectivity of the catalyst. Specifically, it relates to a catalyst for hydrocracking inferior and heavy diesel oil to produce high aromatic latent naphtha and low BMCI value hydrogenation tail oil and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's ethylene, PX, catalytic reforming and other devices, China's naphtha market as a whole is in short supply. In 2015, although China's naphtha import volume soared to 6.65 million tons (an increase of 80% year-on-year), China's naphtha supply gap remained at 4.19 million tons per year. Therefore, the shortage of chemical raw materials will become one of the main restrictive factors for ...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J29/16B01J37/02B01J37/10B01J37/30C10G47/20
CPCB01J37/0207B01J37/10B01J37/30B01J29/084B01J29/166C10G47/20C10G2300/1037B01J2229/42B01J2229/36B01J2229/18
Inventor 鲁旭赵秦峰王书芹兰玲葛少辉侯远东朴佳锐康宏敏李荣观
Owner PETROCHINA CO LTD
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