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

A hydrocracking and beta zeolite technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of limited application scope of catalysts, inability of reactants to be removed in time, and difficult access of macromolecular hydrocarbons, etc. Achieve the effect of reducing the total synthesis time, improving the crystal synthesis and production speed, and reducing the number of miscellaneous crystals

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

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

[0047] The molar ratio of feed 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℃, time: 20 hours

[0051] The second stage reaction conditions: 140℃, time: 40 hours

[0052] Reaction conditions of the third stage: 180°C, time: 8 hours.

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

Example Embodiment

[0054] Example 2

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

[0056] The molar ratio of feed 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℃, time: 30 hours

[0060] The second stage reaction conditions: 150℃, time: 48 hours

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

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

[0063] Get sample B

[0064] Table 1 Main physical and chemical properties of B-β products

[0065] Sample

Example Embodiment

[0066] Example 3

[0067] The present invention synthesizes modified B-β zeolite C. Take 2000ml of sample A 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 to 90 Stir at a constant temperature of ~95°C for 2 hours, then lower the temperature to 5 ~ 60°C and filter, and then exchange the wet cake for the second time under the same conditions as the first. The B-β zeolite that has undergone two ammonium salt exchanges is washed until the pH reaches 5-6, and then placed in a drying box and dried at 110-120°C for 6 hours (dry basis is 88% by weight). The dried B-β zeolite was put into a muffle furnace to quickly raise the temperature to 250°C for 2 hours, then continue to quickly raise the temperature to 400°C, then keep the temperature constant for 4 hours, and finally to 540°C and keep the temperature co...

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