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A kind of preparation method of catalyst for producing low-carbon olefins by catalytic diesel cracking

A technology for catalyzing diesel oil and catalysts, which is applied in the direction of catalyst activation/preparation, carbon compound catalysts, physical/chemical process catalysts, etc. It can solve problems such as poor stability, high reaction temperature, and low olefin yield, so as to improve wear performance and reduce Effects of production cost and olefin selectivity improvement

Active Publication Date: 2021-06-11
QINGDAO HUICHENG PETROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned catalysts generally have one or more deficiencies such as high cost, low olefin yield, high reaction temperature, too fast catalyst deactivation, and poor stability.

Method used

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  • A kind of preparation method of catalyst for producing low-carbon olefins by catalytic diesel cracking
  • A kind of preparation method of catalyst for producing low-carbon olefins by catalytic diesel cracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 0.62 kg of aluminum hydroxide, 2.2 kg of 85% phosphoric acid and 1 kg of water are mixed and beaten, heated up to 85°C, reacted for 2 hours, and set aside.

[0037] (2) 4.21 kilograms of ZSM-5 molecular sieves, 240ml zinc chloride solution, 144ml ferric chloride solution and 2.5 kilograms of water were mixed and beaten, filtered and roasted at 650°C for 2 hours to obtain ZSM-5 modified molecular sieves;

[0038] (3) Colloid made in (1), water, ZSM-5 modified molecular sieve made in (2), 2.54 kilograms of kaolin mixed beating;

[0039] (4) 0.56 kilograms of modified Y-type molecular sieves, 2.31 kilograms of pseudo-boehmite are beaten together with water, and hydrochloric acid is added to acidify, and stir;

[0040] (5) Quickly add the slurry in step (3) into the slurry in step (4), mix evenly, spray granulate, wash with water, and dry to prepare the catalyst, marked as SL-1.

Embodiment 2

[0042] (1) 0.54 kg of aluminum hydroxide, 2.2 kg of 85% phosphoric acid and 1 kg of water are mixed and beaten, heated to 80°C, reacted for 1.5 hours, and set aside.

[0043] (2) 3.16 kilograms of ZSM-5 molecular sieves, 220ml of zinc chloride solution, 122ml of ferric chloride solution and 2.5 kilograms of water were mixed and beaten, filtered and roasted at 600°C for 1 hour to obtain ZSM-5 modified molecular sieves;

[0044] (3) ZSM-5 modified molecular sieve made in (1), water, made in (2), 1.61 kilograms of kaolin mixed beating;

[0045] (4) 2.10 kilograms of modified Y-type molecular sieves, 2.77 kilograms of pseudo-boehmite are beaten together with water, and hydrochloric acid is added to acidify, and stir;

[0046] (5) Quickly add the slurry in step (3) into the slurry in step (4), mix evenly, spray granulate, wash with water, and dry to obtain the catalyst, marked as SL-2.

Embodiment 3

[0048] (1) 0.46 kg of aluminum hydroxide, 2.2 kg of 85% phosphoric acid and 1 kg of water are mixed and beaten, heated up to 85°C, reacted for 2 hours, and set aside.

[0049] (2) 2.63 kilograms of ZSM-5 molecular sieves, 100ml of zinc chloride solution, 120ml of ferric chloride solution and 2.5 kilograms of water were mixed and beaten, filtered and roasted at 550°C for 1.5 hours to obtain ZSM-5 modified molecular sieves;

[0050] (3) ZSM-5 modified molecular sieve made in (1), water, made in (2), 3.15 kilograms of kaolin mixed beating;

[0051] (4) 1.58 kilograms of modified Y-type molecular sieves, 2.46 kilograms of pseudo-boehmite are beaten together with water, and hydrochloric acid is added to acidify, and stir;

[0052] (5) Quickly add the slurry in step (3) into the slurry in step (4), mix evenly, spray granulate, wash with water, and dry to obtain the catalyst, marked as SL-3.

[0053] The analysis result of catalyst in the example is as follows

[0054] Table 1 cata...

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Abstract

The invention discloses a method for preparing a low-carbon olefin catalyst by catalyzing diesel oil cracking. The steps are as follows: (1) mixing aluminum hydroxide, phosphoric acid and water for beating, raising the temperature to 75-95° C., reacting for 1-3 hours, and waiting for use (2) ZSM-5 molecular sieve, water, zinc chloride, and ferric chloride are mixed and beaten, filtered and roasted at 550-650° C. for 0.5-2 hours to obtain ZSM-5 modified molecular sieve; (3) (1) Colloid made in, water, (2) ZSM-5 modified molecular sieve made in (2), kaolin mixed beating; (4) modified Y-type molecular sieve, pseudo-boehmite and water beating together, and adding hydrochloric acid to carry out acidification, Stir evenly; (5) quickly add the slurry in step (3) to the slurry in step (4), mix evenly, spray granulate, wash with water, and dry to prepare the catalyst. In the preparation method of the present invention, the modified molecular sieve improves the selectivity of low-carbon olefins and improves the wear index.

Description

Technical field: [0001] The invention relates to a preparation method of a catalyst for producing low-carbon olefins by catalytic cracking of diesel oil, in particular to a preparation method of a catalyst for producing ethylene, propylene and butene by catalytic cracking of catalytic diesel oil. Background technique: [0002] In recent years, the demand for ethylene, propylene, and butene, which are basic petrochemical raw materials, has grown rapidly. Ethylene is an important organic chemical raw material, which can be used to produce a variety of chemical products and ethylene-based plant growth regulators; propylene is used to produce a variety of important organic chemical raw materials, synthetic resins, synthetic rubbers, and various fine chemicals; N-butene is mainly used in the manufacture of butadiene, followed by the manufacture of methyl ethyl ketone, sec-butanol, butylene oxide and butene polymers and copolymers. Isobutylene is mainly used in the manufacture of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C07C4/06C07C11/04C07C11/06C07C11/08
CPCB01J29/084B01J29/46B01J29/80B01J37/0009B01J2229/18C07C4/06C07C2529/80C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 高明军杜文婷李凤叶红王鹏
Owner QINGDAO HUICHENG PETROCHEM TECH