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Middle-oil type hydrocracking catalyst carrier and preparation method thereof

A catalyst carrier and hydrocracking technology, which is applied in the direction of catalyst carrier, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low selectivity of catalyst oil, lowering the freezing point of diesel fraction, and low selectivity of medium oil, etc., to achieve Appropriate acidity and acidity distribution, reduced diesel-steam ratio, and large specific surface area

Active Publication Date: 2017-10-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has excellent hydrocracking performance and hydrodewaxing performance, good catalyst activity, high selectivity to medium oil, suitable for hydrocracking process of prolific jet fuel and clean diesel, but low selectivity to medium oil
[0008] CN101578353A introduces a method for selective hydrocracking of β molecular sieves, in which Hβ molecular sieves are subjected to hydrothermal treatment at low temperature, and the silicon-aluminum ratio of the product is 30:1, SF 6 The adsorption capacity is about 28wt%, and the β molecular sieve obtained by this modification method is used as the cracking component, and the oil selectivity in the catalyst is not high
The catalyst prepared by using the β molecular sieve obtained by this modification method as a cracking component can greatly reduce the freezing point of the diesel fraction while maintaining a high diesel yield, but the medium oil yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 200g of Hβ molecular sieves (referred to as 1-1) in a four-necked flask, add 2.0L of deionized water, and stir to raise the temperature to 90°C. Prepare 500 g of ammonium fluorosilicate aqueous solution with a mass fraction of 6% wt, add it into the molecular sieve slurry at a constant speed within 2 hours, add 30 g of ammonium fluorosilicate in total, then stir at constant temperature and speed for 2 hours, filter and dry to obtain the target product number 1-2.

[0040] Take 100g 1-2 in a tube furnace, control the thickness of the molecular sieve material layer at 5mm, program the temperature to 570°C, pass the water vapor through the molecular sieve at 50L / hour per kilogram of molecular sieve, and control the system pressure at 0.1 through the back pressure valve Mpa, constant temperature treatment for 3 hours, after the hydrothermal treatment, take out the molecular sieve and put it into a closed flask with a reflux device, add 1.0mol / L (in the form of Al 3+ M...

Embodiment 2

[0042] Take 200g of Hβ molecular sieves (referred to as 1-1) in a four-necked flask, add 1.6L of deionized water, and stir to raise the temperature to 95°C. Prepare 500g of ammonium fluorosilicate aqueous solution with a mass fraction of 20%wt, add it into the molecular sieve slurry at a constant speed within 4 hours, add 100g of ammonium fluorosilicate in total, then stir at constant temperature and speed for 2 hours, filter and dry to obtain the target product number 1-4.

[0043] Take 100g of 1-4 in a tube furnace, control the thickness of the molecular sieve material layer at 8mm, program the temperature to 620°C, pass the water vapor through the molecular sieve at 50L / hour per kilogram of molecular sieve, and control the system pressure at 0.05 through the back pressure valve Mpa, constant temperature treatment for 4 hours, after the hydrothermal treatment, take out the molecular sieve and put it into a closed flask with a reflux device, add 2.0mol / L (in the form of Al 3...

Embodiment 3

[0045] Take 200g of Hβ molecular sieves (referred to as 1-1) in a four-necked flask, add 2.4L of deionized water, and stir to raise the temperature to 80°C. Prepare 500 g of ammonium fluorosilicate aqueous solution with a mass fraction of 4% wt, add it into the molecular sieve slurry at a uniform speed within 4 hours, add 20 g of ammonium fluorosilicate in total, then stir at constant temperature and speed for 4 hours, filter and dry to obtain the target product number 1-6.

[0046] Take 100g1-6 in a tube furnace, control the thickness of the molecular sieve material layer at 5mm, program the temperature to 550°C, pass the water vapor through the molecular sieve at 50L / hour per kilogram of molecular sieve, and control the system pressure at 0.2Mpa through the back pressure valve , constant temperature treatment for 1 hour, after the hydrothermal treatment, take out the molecular sieve and put it into a closed flask with a reflux device, add 0.1mol / L (in the form of Al 3+ Mola...

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Abstract

The invention discloses a high-activity middle-oil type hydrogenation catalyst carrier and a preparation method thereof. A beta molecular sieve obtained through modification has a balanced cracking performance. The catalyst carrier comprises the following components in percent by mass in terms of a catalyst dry basis: 5%-20% of the modified beta molecular sieve, 20%-50% of amorphous silica-alumina, 20%-50% of macroporous alumina and 10%-25% of small-pore alumina. A catalyst prepared by using the catalyst carrier has the characteristics that the catalytic activity and middle-oil selectivity are high, the low-temperature performance of middle-distillate products is good, the smoke point of aviation kerosene is high, and the cetane number of diesel is high.

Description

technical field [0001] The invention relates to a medium-oil type high-selectivity hydrocracking catalyst and a preparation method thereof. Modified β molecular sieve is used as the main cracking component, which has excellent catalytic activity, high medium-oil selectivity, and the middle distillate produced has the smoke point of aviation coal. High, low freezing point, high cetane number of diesel oil. Background technique [0002] In recent years, with the increasing scarcity of global oil resources, the inferior and heavy crude oil has become a huge challenge for refineries. Hydrocracking, as an important means of heavy oil lightening and low-quality oil hydrogenation upgrading, has the characteristics of flexible production plan, strong adaptability of raw materials, and good quality of target products. Hydrocracking technology has become an important method for heavy oil lightening. , One of the important means of upgrading inferior oil products. [0003] With frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J29/70B01J29/90C10G47/16
CPCB01J29/7007B01J29/90B01J32/00B01J2229/10B01J2229/16C10G47/16
Inventor 鲁旭赵秦峰袁晓亮王书芹朴佳锐葛少辉康宏敏鞠雅娜钟海军李阳姜增琨高卓然喻昊王飞徐华霍明辰
Owner PETROCHINA CO LTD
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