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Preparation method for modified B-Beta zeolite-containing hydrocracking catalyst

A technology of hydrocracking and zeolite beta, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc. It can solve the problems of limited application range of catalysts, reactants cannot be removed in time, and large molecular hydrocarbons are not easy to enter. Reach the effect of reducing the total synthesis time, increasing the crystal synthesis and production speed, and less miscellaneous crystals

Active Publication Date: 2014-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, only chain-type and short-chain alkanes can enter the zeolite structure, that is, only straight-chain hydrocarbons can be converted to lower the freezing point of diesel and tail oil in the product, but due to the small pores, the reactants cannot be removed in time , resulting in excessive cracking, which reduces the selectivity of medium oil, and at the same time, it is difficult for macromolecular hydrocarbons to enter. When dealing with heavy hydrocarbon materials, the activity is low
Therefore, the application range of this type of catalyst is generally limited to the hydrogen decondensation process of light components

Method used

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  • Preparation method for modified B-Beta zeolite-containing hydrocracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Tetraethylammonium hydroxide (TEAOH) is used as template, and the raw materials are borax, sodium hydroxide and silica gel.

[0047] The molar ratio of feeding is:

[0048] SiO 2 / B 2 o 3 =30;TEAOH / B 2 o 3 =3.6; Al 2 o 3 / B 2 o 3 =0

[0049] Na 2 O / B 2 o 3 = 2; H 2 O / B 2 o 3 =200.

[0050] The first stage reaction conditions: 120°C, time: 20 hours

[0051] Second stage reaction conditions: 140°C, time: 40 hours

[0052] The third stage reaction condition: 180°C, time: 8 hours.

[0053] The synthetic sample is B-beta sample A.

Embodiment 2

[0055] Tetraethylammonium hydroxide (TEAOH) is used as a template, and the raw materials are boric acid, sodium hydroxide and water glass.

[0056] The molar ratio of feeding is:

[0057] SiO 2 / B 2 o 3 =55;TEAOH / B 2 o 3 =1.8; Al 2 o 3 / B 2 o 3 =0.5

[0058] Na 2 O / B 2 o 3 =12;H 2 O / B 2 o 3 =400.

[0059] The first stage reaction conditions: 140°C, time: 30 hours

[0060] Second stage reaction conditions: 150°C, time: 48 hours

[0061] The reaction condition of the third stage: 180°C, the time: 20 hours.

[0062] The main properties of the products obtained are listed in Table 1.

[0063] get sample B

[0064] Table 1 Main physicochemical properties of B-β products

[0065] sample

Embodiment 3

[0067]The invention synthesizes modified B-beta zeolite C. Take 2000ml of A sample slurry, containing 400g of solid phase (on a dry basis), dilute the solid-liquid volume ratio to 1:10 with clean water, then add ammonium nitrate to make the concentration of ammonium nitrate in the solution 2.0M, stir, and heat up to 90 Stir at ~95°C for 2 hours at a constant temperature, then cool down to 5-60°C for filtration, and perform a second exchange of the wet filter cake under the same conditions as the first. The B-beta zeolite that has been exchanged twice with ammonium salts is washed until the pH reaches 5-6, and then placed in a drying oven and dried at 110-120° C. for 6 hours (dry basis is 88% by weight). The dried B-β zeolite is placed in a muffle furnace and rapidly raised to 250°C, kept at a constant temperature for 2 hours, then rapidly raised to 400°C, kept at a constant temperature for 4 hours, and finally raised to 540°C, kept at a constant temperature for 10 hours. Afte...

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Abstract

The invention relates to a preparation method for a modified B-Beta zeolite-containing hydrocracking catalyst. Modified B-Beta zeolite is first prepared, the modified B-Beta zeolite and macroporous amorphous silica-alumina are uniformly mixed and added with bionder or peptizer, and after shaping, drying and baking, a catalyst carrier is prepared; the impregnation method is adopted to load hydrogenation active components, and after drying and baking, the hydrocracking catalyst is prepared. While taking account of catalyst activity and middle fraction oil selectivity, the hydrocracking catalyst prepared by the method also can be used for producing high-quality, low-freezing point diesel oil.

Description

technical field [0001] The present invention relates to a method for preparing a hydrocracking catalyst, especially a method for preparing a medium-oil type hydrocracking catalyst for the purpose of high-yield middle distillate oil, especially while taking into account catalyst activity and middle distillate oil selectivity, it can also A hydrocracking catalyst for producing high-quality low-condensation diesel oil and a preparation method thereof. Background technique [0002] Hydrocracking is an important means of petroleum processing, especially for the secondary processing of distillate oil to produce various petroleum products. The use of zeolite in hydrocracking catalyst is a qualitative leap in hydrocracking catalyst technology. It has changed the shortcomings of low activity and short operation period of amorphous hydrocracking catalysts in the past, and made the activity and stability of catalysts more stable. Good, longer life, so most of the hydrocracking industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/78B01J29/76B01J35/10C10G47/20
Inventor 谷明镝黄薇
Owner CHINA PETROLEUM & CHEM CORP
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