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Catalyst for increasing yield of low-carbon olefins by directly catalytically cracking crude oil and preparation method thereof

A technology for catalytic cracking and low-carbon olefins, which is applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., and can solve the problem of low yield of low-carbon olefins

Pending Publication Date: 2021-09-14
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes a catalyst for directly catalytically cracking crude oil to increase the production of low-carbon olefins and a preparation method thereof, which solves the problem of low yield of low-carbon olefins in the process of cracking crude oil with existing catalysts

Method used

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  • Catalyst for increasing yield of low-carbon olefins by directly catalytically cracking crude oil and preparation method thereof
  • Catalyst for increasing yield of low-carbon olefins by directly catalytically cracking crude oil and preparation method thereof
  • Catalyst for increasing yield of low-carbon olefins by directly catalytically cracking crude oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 1.43 Kg of diammonium hydrogen phosphate, dissolve in an appropriate amount of deionized water, slowly add 26 Kg ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =38), let stand overnight, dry at 100°C for 10 h, place in a muffle furnace and bake at 650°C for 4 h to obtain modified P / ZSM-5; weigh 0.26 Kg of zirconium nitrate and dissolve it in an appropriate amount of deionized water, Slowly add the above-mentioned modified P / ZSM-5 molecular sieve under low temperature, let stand overnight, dry at 100°C for 10 h, and place in a muffle furnace for calcination at 650°C for 2 h to obtain modified P-Zr / ZSM-5;

[0030] Weigh 3.36 Kg USY molecular sieve and 13.86 Kg pseudo-boehmite, mix them evenly, and acidify them with hydrochloric acid, mix the aluminum phosphate, the acidified pseudo-boehmite sol and water for beating, stir well, and then add the modified P- Zr / ZSM-5 molecular sieve and 15.2Kg kaolin were mixed and beaten for 6 hours, dried at 100°C for 12 hours, calcined a...

Embodiment 2

[0032] Weigh 1.43 Kg of diammonium hydrogen phosphate, dissolve in an appropriate amount of deionized water, slowly add 26 Kg ZSM-5 molecular sieve (SiO 2 / Al 2 o 3=38), let stand overnight, dry at 100°C for 10 h, place in a muffle furnace and bake at 650°C for 4 h to obtain modified P / ZSM-5; weigh 0.4 Kg of zirconium nitrate, dissolve in appropriate amount of deionized water, and stir Slowly add the above-mentioned modified P / ZSM-5 molecular sieve under the conditions, let it stand overnight, dry at 100°C for 10 h, and place it in a muffle furnace for calcination at 650°C for 2 h to obtain the modified P-Zr / ZSM-5 molecular sieve;

[0033] Weigh 3.36 Kg USY molecular sieve and 13.86 Kg pseudo-boehmite, mix them evenly, and acidify them with hydrochloric acid, mix the aluminum phosphate, the acidified pseudo-boehmite sol and water for beating, stir well, and then add the modified P- Zr / ZSM-5 molecular sieve and 15.2 Kg kaolin were mixed and beaten for 6 hours, dried at 100°C ...

Embodiment 3

[0035] Weigh 1.43 Kg of diammonium hydrogen phosphate, dissolve in an appropriate amount of deionized water, slowly add 26 Kg ZSM-5 molecular sieve (SiO 2 / Al 2 o 3 =38), let it stand overnight, dried at 100°C for 10 h, and roasted at 650°C in a muffle furnace for 4 h to obtain modified P / ZSM-5; weighed 0.82 Kg of zirconium nitrate and dissolved it in an appropriate amount of deionized water, and put it under stirring conditions Slowly add the above-mentioned modified P / ZSM-5 molecular sieve under low temperature, let stand overnight, dry at 100°C for 10 h, and place in a muffle furnace for calcination at 650°C for 2 h to obtain modified P-Zr / ZSM-5;

[0036] Weigh 3.36 Kg USY molecular sieve and 13.86 Kg pseudo-boehmite, mix them evenly, and acidify them with hydrochloric acid, mix the aluminum phosphate, the acidified pseudo-boehmite sol and water for beating, stir well, and then add the modified P- Zr / ZSM-5 molecular sieve and 15.2Kg kaolin were mixed and beaten for 6 hour...

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PUM

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Abstract

The invention provides a catalyst for increasing the yield of low-carbon olefins by directly catalytically cracking crude oil and a preparation method thereof. The catalyst comprises, on the basis of dry base weight, 5%-20% of a Y-type molecular sieve, 20%-50% of a phosphorus and zirconium modified ZSM-5 molecular sieve, 10%-40% of a carrier and 5%-25% of a binder; the catalyst is characterized in that the phosphorus and zirconium co-modified ZSM-5 molecular sieve is used for regulating and controlling the acid amount of the catalyst and the pore distribution of the catalyst, and diffusion of reactants in the catalyst and generation of a target product are facilitated. The developed catalyst is used for inhibiting secondary reaction in the direct catalytic cracking process of crude oil, the yield of the low-carbon olefins in the product is increased, and the catalyst has a relatively good application prospect.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for directly catalytically cracking crude oil to increase the production of low-carbon olefins and a preparation method thereof. Background technique [0002] With the promotion of new energy vehicles, the production of refined oil has diminishing returns. On the other hand, the demand for basic chemical raw materials such as ethylene and propylene has grown rapidly. The petrochemical industry has begun to transform from the production of refined oil to high-value-added chemical products. The processes for producing low-carbon olefins mainly include petroleum catalysis / steam cracking, methanol-to-olefins, etc. The investment in methanol-to-olefins is large, the product structure is single, and the process CO 2 Emissions are very high (5.8 tons CO 2 per ton of olefins), which is about 7 times that of the naphtha-to-olefins process. Under the influence of the carbon-n...

Claims

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Application Information

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IPC IPC(8): B01J29/80C07C4/06C07C11/04C07C11/06C07C11/08
CPCB01J29/80C07C4/06B01J29/405B01J29/084B01J29/088C07C2529/80C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 王慧张国霞郝鹏波王红岩焦念明
Owner 郑州中科新兴产业技术研究院
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