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Aromatic-rich light distillate oil selective hydrogenation catalyst as well as preparation method and application thereof

A light distillate oil and hydrogenation catalyst technology, which is applied in the directions of aromatic hydrocarbon hydrorefining, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor hydrogenation selectivity and high hydrogen consumption and other problems to achieve the effect of good technical effect

Active Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the problems of poor hydrogenation selectivity and high hydrogen consumption in the prior art when hydrogenating aromatic-rich light distillate oil, and provides a new catalyst, which has the ability to selectively hydrogenate condensed ring aromatics Saturated to generate benzene series and increase the production of aromatics; at the same time, it can remove heterocyclic compounds such as sulfur and nitrogen in the raw material, so that the sulfur and nitrogen in the product are less than 1ppm

Method used

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  • Aromatic-rich light distillate oil selective hydrogenation catalyst as well as preparation method and application thereof
  • Aromatic-rich light distillate oil selective hydrogenation catalyst as well as preparation method and application thereof
  • Aromatic-rich light distillate oil selective hydrogenation catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Preparation of composite carrier

[0060] Weigh 2000 g of pseudo-boehmite powder with an average particle size of 6 nm and roast at 850° C. for 8 hours to obtain powder A.

[0061] Weigh 500 grams of the above-mentioned powder A and 500 grams of pseudo-boehmite powder, add 15 grams of hydroxymethyl cellulose and 30 grams of Tianqing powder and mix evenly to obtain powder B. Mix 800 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above powder B, extrude, then dry at 110°C for 6 hours, and roast at 600°C for 3 hours to obtain a double Composite support with pore distribution. The pore size distribution, pore volume and specific surface area are shown in Table 1. figure 1 .

[0062] Catalyst preparation

[0063] The active components are loaded by equal volume impregnation method: 300 grams of water, 124.3 grams of cobalt nitrate (32 grams of cobalt containing cobalt...

Embodiment 2

[0070] Preparation of composite carrier

[0071] Weigh 2000 g of pseudo-boehmite powder with an average particle size of 6 nm and roast at 850° C. for 8 hours to obtain powder A.

[0072] Weigh 300 grams of the above-mentioned powder A and 700 grams of pseudo-boehmite powder, add 15 grams of hydroxymethyl cellulose and 30 grams of Tianqing powder and mix evenly to obtain powder B. Mix 700 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above powder B, extrude, then dry at 110°C for 6 hours, and roast at 600°C for 3 hours to obtain a double Composite support with pore distribution. The pore size distribution, pore volume and specific surface area are shown in Table 1.

[0073] Catalyst preparation

[0074] The active components are loaded by equal volume impregnation method: 300 grams of water, 124.3 grams of cobalt nitrate (32 grams of cobalt containing cobalt oxide), 109...

Embodiment 3

[0081] Preparation of composite carrier

[0082] Weigh 2000 g of pseudo-boehmite powder with an average particle size of 6 nm and roast at 850° C. for 8 hours to obtain powder A.

[0083] Weigh 500 grams of the above-mentioned powder A and 500 grams of pseudo-boehmite powder, add 15 grams of hydroxymethyl cellulose and 30 grams of Tianqing powder and mix evenly to obtain powder B. Mix 800 grams of water, 20 grams of nitric acid, 10 grams of acetic acid, and 5 grams of calcium nitrate to form a transparent aqueous solution, knead with the above powder B, extrude, then dry at 110°C for 6 hours, and roast at 600°C for 3 hours to obtain a double Composite support with pore distribution. The pore size distribution, pore volume and specific surface area are shown in Table 1. figure 1 .

[0084] Catalyst preparation

[0085] The active component is loaded by equal volume impregnation method: 300 grams of water, 77.7 grams of cobalt nitrate (20 grams of cobalt containing cobalt ox...

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Abstract

The invention relates to an aromatic-rich light distillate oil selective hydrogenation catalyst as well as a preparation method and application thereof. The catalyst comprises the following components based on the total weight of the catalyst: (a) 1-10% of CoO, (b) 1-10% of NiO, (c) 3-15%of MoO3, (d) 3-30% of WO3, and (e) 35-92% of a composite carrier, wherein the composite carrier has a double-pore structure with pore diameters being 4-6 nm and from 8-11 nm. The catalyst can perform selective hydrogenation on aromatic-rich light distillate oil and perform selective hydrogenation saturation on polycyclic aromatic hydrocarbon to generate naphthenic benzene series, the conversion rate is greater than 95%, the selectivity of generated tetrahydronaphthalene is greater than 95%, aromatic hydrocarbon in raw materials is retained, the retention rate of the aromatic hydrocarbon is greater than 96%, heterocyclic compounds such as sulfur and nitrogen in the raw materials are removed, sulfur and nitrogen in the product are less than 1ppm, and a better technical effect is achieved.

Description

technical field [0001] The invention belongs to the field of aromatic-rich light distillate oil treatment, and in particular relates to a selective hydrogenation catalyst for aromatic-rich light distillate oil, a preparation method and application thereof. Background technique [0002] Aroma-rich light distillates, such as ethylene crackers C 9 , Ethylene light tar, etc. are the high-temperature condensation products of ethylene cracking raw materials and products during steam cracking, mainly from the quenching oil tower kettle and heavy fuel oil stripping tower kettle. These cracking by-products are a light distillate oil (<300°C) rich in aromatics (aromatics content greater than 90%), the main components of which are single-ring aromatics and a small amount of polycyclic aromatics, with short side chains and high carbon-to-hydrogen ratios , heavy metals, low ash content, and these cracking by-products also contain heterocyclic compounds of N, S, O and other elements. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/10C10G45/50
CPCB01J23/8885B01J23/002C10G45/50B01J2523/00C10G2300/202C10G2400/30B01J35/393B01J35/23B01J35/615B01J35/635B01J35/69B01J35/647B01J2523/68B01J2523/69B01J2523/845B01J2523/847Y02P20/52
Inventor 钱斌刘仲能刘师前马宇春韩亚梅
Owner CHINA PETROLEUM & CHEM CORP