Method for preparing non-noble metal catalyst for light fraction conversion of C10<+> heavy aromatics

A technology for lightening heavy aromatics and non-precious metals, applied in the field of petrochemicals, can solve the problems of low hydrogenation activity, limit technology application, increase catalyst cost, etc., achieve the effect of improving catalyst activity, reducing aggregation, and reducing catalyst cost

Active Publication Date: 2017-11-24
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high calcination temperature of traditional nickel phosphide catalysts leads to the aggregation of active phases and low hydrogenation activity. The alumina in the carrier will also react with phosphorus to form aluminum phosphate, which greatly reduces the reactivity of the catalyst and cannot meet the requirements of C. 10 + Demand for Lightening Heavy Aromatics
[0007] It can be seen from the prior art that the high hydrogenation activity of noble metals is mainly used to increase the C 10 + The conversion rate of heavy aromatics and the stability of the catalyst will greatly increase the cost of the catalyst and limit the application of the technology

Method used

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  • Method for preparing non-noble metal catalyst for light fraction conversion of C10&lt;+&gt; heavy aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Mix 65g HY molecular sieve (dry basis) with 25g pseudo-boehmite (dry basis) 4g sesame powder, add a dilute nitric acid solution with a mass concentration of 3%, and extrude the product into the form of Φ2 extrusion material. After air-drying, it was dried at 125°C for 15 hours, and then the temperature was programmed to 550°C and calcined for 8 hours to prepare a catalyst carrier. The water absorption rate of the carrier was measured to be 105%.

[0038] (2) Add the prepared catalyst carrier to 350ml of deionized water, heat the water bath to 50°C, add 39g of nickel nitrate hexahydrate and stir for 24h, put it in a 90°C blast drying oven to dry until there is no obvious residual liquid, and heat to Incubate at 110°C for 12 hours to obtain a nickel-loaded modified carrier.

[0039] (3) Add 4 g of oxalic acid into 94.5 g of deionized water, pour it into the carrier obtained in step (2) and let it stand for 8 hours after it is completely dissolved, and then increase the tem...

Embodiment 2

[0043] (1) Mix 55g HY molecular sieve (dry basis) and 40g pseudo-boehmite (dry basis) 3g sesame powder, add 4% dilute nitric acid solution, and extrude the product into Φ2 extrudate form After being dried naturally, it was dried at 120°C for 20 hours, and then the temperature was programmed to 500°C and calcined for 10 hours to prepare a catalyst carrier, and the water absorption rate of the carrier was measured to be 95%.

[0044] (2) Add the prepared catalyst carrier to 300ml of deionized water, heat the water bath to 60°C, add 51g of nickel nitrate hexahydrate and stir for 20h, put it in a 85°C blast drying oven and dry it until there is no obvious residual liquid, and heat it to Incubate at 120°C for 10 hours to obtain a nickel-loaded modified carrier.

[0045] (3) Add 8 g of formic acid into 90.3 g of deionized water, pour it into the carrier obtained in step (2) after being completely dissolved, and let it stand for 12 hours, and then increase the temperature to 130° C. and d...

Embodiment 3

[0049] (1) Mix 55gHβ molecular sieve (dry basis) with 40g pseudo-boehmite (dry basis) and 3g sesame powder, add 4% dilute nitric acid solution, and extrude the product into Φ2 extrudate form After being dried naturally, it was dried at 120°C for 20 hours, and then the temperature was programmed to 500°C and calcined for 10 hours to prepare a catalyst carrier. At the same time, the water absorption rate of the carrier was measured to be 102%.

[0050] (2) Add the prepared catalyst carrier to 300ml of deionized water, heat the water bath to 60°C, add 51g of nickel nitrate hexahydrate and stir for 20h, put it in a 85°C blast drying oven and dry it until there is no obvious residual liquid, and heat it to Incubate at 120°C for 10 hours to obtain a nickel-loaded modified carrier.

[0051] (3) Add 8 g of oxalic acid into 96.9 g of deionized water, and after completely dissolving, pour it into the carrier obtained in step (2), let it stand for 12 hours, and then raise the temperature to 1...

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Abstract

The invention relates to a method for preparing a non-noble metal catalyst for light fraction conversion of C10<+> heavy aromatics. According to the catalyst disclosed by the invention, elemental nickel and nickel phosphide (Ni2P) serve as an active phase, and a molecular sieve and alumina serve as a carrier. With the adoption of a competition adsorbent, the problem that the alumina in the carrier is reacted with phosphorus to produce aluminum phosphate so as to greatly reduce the reaction activity of the catalyst is solved; with the adoption of a low-boiling-point organic matter with strong reducing property, the nickel phosphide phase production temperature is reduced, the nickel phosphide particle aggregation is reduced, and the catalyst activity is greatly improved; the non-noble metal hydrogenation activity phase is adopted to replace noble metals, so that the catalyst cost is greatly reduced.

Description

Technical field [0001] The present invention relates to a C10 + The preparation method of heavy aromatics light-weight catalyst belongs to the field of petrochemical industry. Background technique [0002] Refinery catalytic reforming and ethylene cracking units produce large amounts of heavy aromatics of C9, C10 and above. At present, C9 aromatics (a small amount of C10 aromatics) are generally used in the transalkylation reaction to prepare mixed xylene, part of C 10 + A small amount of economically valuable components are separated through rectification and above heavy aromatics, but at the same time 20-30% of C 10 + Heavy aromatics are converted into heavy residual oil, and the remaining C10+ heavy aromatics are basically used as low-priced fuels. According to the existing C 10 + The production and operation model of heavy aromatics has low raw material utilization rate, which wastes resources and pollutes the environment, making it difficult to bring out the economic benefit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/14B01J29/76C10G45/54
CPCB01J29/146B01J29/7615B01J2229/18C10G45/54C10G2300/1096C10G2400/30
Inventor 臧甲忠宫毓鹏范景新李健于海斌马明超刘冠锋潘月秋隋芝宇耿姗
Owner CHINA NAT OFFSHORE OIL CORP
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