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High activity medium oil type hydrocracking catalyst and its preparation method

A technology for hydrocracking and high-medium oil, which is applied in the fields of hydrocarbon oil cracking and petroleum industry. It can solve the problems of low catalyst hydrocracking activity, high catalyst hydrocracking activity, and weak catalyst nitrogen resistance, etc., and achieve cracking activity. And the effect of good stability, reduced metal loss, and excellent performance

Active Publication Date: 2007-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent ZL98114489.6 provides a heavy hydrocarbon hydrocracking catalyst prepared by a co-gel method. The molecular sieve used is the modified Y-type molecular sieve reported in ZL96119840.0, but this Y-type molecular sieve is a strong acid type molecular sieve. Therefore, the hydrocracking activity of the catalyst is high, and the selectivity of medium oil is poor
[0005] Chinese patent ZL00123131.6 also provides a selective hydrocracking catalyst for high and medium oil prepared by co-gelation method. The molecular sieve used is a modified Y-type molecular sieve. This Y-type molecular sieve has low acid center strength and belongs to Weak acid type molecular sieve, so the catalyst has low hydrocracking activity and high selectivity for medium oil
CN1253859A discloses a high and medium oil type hydrocracking catalyst, the catalyst contains 4-40% of Y zeolite and 10-50% of amorphous silica-alumina and other components, because the zeolite of the catalyst is not resistant to nitrogen with low crystallinity The superhydrophobic Y zeolite, so the nitrogen resistance of the catalyst is not strong, it can only be used in the hydrocracking process with pre-refining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Catalyst A is the catalyst prepared by the inventive method, and catalyst weight is composed of: WO 3 22.0%, NiO 9.0%, ZrO 2 7% SiO 2 33%, Al 2 o 3 29%, of which the molecular sieve content is 20%, and the specific surface area is 240m 2 / g, the pore volume is 0.34ml / g.

[0021] Concrete preparation steps are as follows:

[0022] (1) Prepare Al-containing 2 o 3 600 ml of aluminum chloride solution with a concentration of 90 g / l, containing NiO 200 ml of nickel chloride solution with a concentration of 140 g / l, containing ZrO 2 150ml of 140g / l zirconium oxychloride solution was mixed in a 5 liter container and diluted with 2000ml of clean water.

[0023] (2) Prepare dilute water glass solution, containing SiO 2 550 milliliters of water glass solution of 75g / l, under stirring situation, (2) is added in (1);

[0024](3) Add ammonia water to the mixture of (1) and (2) under stirring until the pH value is 5.2;

[0025] (4) Prepare 1000 ml of sodium tungstate s...

example 2

[0033] It is the hydrocracking catalyst B of the present invention, and the preparation method is the same as that of Example 1, except that 25% of the Y-type molecular sieve modified by hydrothermal treatment is added before aging, and the molecular sieve Y-B prepared by ZL96119840.0 Example 2 is used as a raw material for the molecular sieve, and the Hydrothermal treatment, hydrothermal treatment conditions are temperature 800 ° C, pressure 0.3 MPa, time 22 hours, to obtain modified molecular sieve Y-B 1 , Y-B and Y-B 1 The properties are shown in Table 3. Catalyst weight composition is: WO 3 21.0%, NiO 7.5%, ZrO 2 6.5% SiO 2 30%, Al 2 o 3 35%, the specific surface is 260m 2 / g, the pore volume is 0.36ml / g.

example 3

[0035] It is the hydrocracking catalyst C of the present invention, and the preparation method is the same as Example 1, except that the Y-type molecular sieve modified by hydrothermal treatment is added before aging to be 17%, and the molecular sieve Y-C prepared by ZL96119840.0 embodiment 3 is used as a raw material for the molecular sieve, and the Hydrothermal treatment, hydrothermal treatment conditions are temperature 700 ° C, pressure 0.5 MPa, time 28 hours, to obtain modified molecular sieve Y-C 1 , Y-C and Y-C 1 The properties are shown in Table 3. Catalyst weight composition is: WO 3 23.6%, NiO 7.4%, ZrO 2 7% SiO 2 31%, Al 2 o 3 31%, the specific surface is 270m 2 / g, the pore volume is 0.31ml / g.

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Abstract

The invention relates to a hydrocracking catalyst with high activity and oil selectivity, which comprises: amorphous alumina silica as carrier; and special modified Y-shape molecular screen as acid constituent that has high crystallinity, low cell parameter, riched secondary pores, large superficial area, belongs to medium strength acid center, and has strong nitrogen-resistant and ring-splitting capacity. This invention has well activity and stability for middle distillate oil in heavy hydrocarbon single-section hydrocracking technique.

Description

technical field [0001] The invention relates to a high-activity, high-medium oil selectivity hydrocracking catalyst and a preparation method thereof, in particular to a high-activity, high-medium oil selectivity hydrocracking catalyst containing modified Y-type molecular sieves and a preparation method thereof. Background technique [0002] At present, the shortage of oil resources in the world, crude oil becomes heavier and worse, the demand for middle distillates increases, the upgrading of petrochemical products and the stricter environmental regulations all greatly promote the lightening of heavy oil, and constitute the accelerated development of hydrogenation. Powerful driving force of technology, hydrocracking is an effective means to increase the production of middle distillate oil. With atmospheric and vacuum distillate oil, vacuum distillate oil and secondary processed light oil as raw materials, high-quality diesel oil and jet fuel can be produced after hydrocrackin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/12
Inventor 徐学军刘东香周长兴冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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