Ex-situ prevulcanization method for hydrogenation catalyst

A technology for pre-sulfiding and hydrogenating catalysts outside the vessel, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., to achieve the effects of good sulfidation, high catalyst activity, and improved safety.

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another object of the present invention is to solve the problem of the safety of the storage, transportation and filling process of the presulfided catalyst outside the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] For the diesel hydrogenation catalyst FHUDS-8 (catalyst dosage: 100g) in the oxidation state listed in Table 1, presulfurization was carried out outside the equipment.

[0041] (1) Vulcanizing agent (elemental sulfur, the amount used is 102% of the theoretical sulfur demand of the diesel hydrogenation catalyst in oxidation state), vulcanization aid (the weight ratio of industrial soybean oil shown in Table 2 and kerosene shown in Table 4 2:1 mixture, the amount used is 25% of the weight of the oxidized diesel hydrogenation catalyst FHUDS-8) and mixed evenly to obtain the pre-sulfurized raw material; the pre-sulfurized raw material is mixed evenly with the oxidized diesel hydrogenation catalyst;

[0042] (2) heat-treat the mixed material in step (1) at 140°C for 1 hour;

[0043] (3) Lower the temperature of the mixed material in step (2) to 60°C, then add a mixture of 1.9g of phosphoric acid (1.9% of the weight of the oxidized diesel hydrogenation catalyst FHUDS-8) and 3...

Embodiment 2

[0047] For the diesel hydrogenation catalyst FHUDS-8 (catalyst dosage: 100g) in the oxidation state listed in Table 1, presulfurization was carried out outside the equipment.

[0048] (1) Vulcanizing agent (elemental sulfur, the dosage is 115% of the theoretical sulfur requirement of diesel hydrogenation catalyst in oxidized state), vulcanization aid (a mixture of industrial rapeseed oil and diesel oil at a weight ratio of 0.5:2, the dosage is oxidized 9% by weight of diesel hydrogenation catalyst FHUDS-8 in state) and mix uniformly to obtain presulfurized raw material; presulfurized raw material is mixed uniformly with oxidized diesel hydrogenation catalyst;

[0049] (2) heat-treat the mixed material in step (1) at 235°C for 1.5h;

[0050] (3) Reduce the temperature of the mixed material in step (2) to 60°C, then add 15 g of diammonium hydrogen phosphate (the amount is 15% of the weight of the diesel hydrogenation catalyst FHUDS-8 in an oxidized state), and mix well;

[0051...

Embodiment 3

[0054] The diesel hydrogenation catalyst FHUDS-8 in the oxidized state in Table 1 was presulfided outside the device (catalyst dosage 100g);

[0055] (1) Add vulcanizing agent (elemental sulfur, the amount is 90% of the theoretical sulfur requirement of diesel hydrogenation catalyst), vulcanization aid (a mixture of industrial soybean oil and white oil at a weight ratio of 2:1, and the amount is oxidized diesel oil) Hydrogen catalyst FHUDS-8 weight 25%) mixed uniformly to obtain presulfurized raw material; presulfurized raw material and oxidized diesel hydrogenation catalyst mixed uniformly;

[0056] (2) heat-treat the mixed material in step (1) at 180°C for 3.5 hours;

[0057] (3) Reduce the temperature of the mixed material in step (2) to 60°C, then add 0.5g of ammonium phosphate (the amount is 0.5% of the weight of the diesel hydrogenation catalyst FHUDS-8 in an oxidized state), and mix well;

[0058] (4) Treat the material obtained in step (3) in a hydrogen atmosphere at ...

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Abstract

The invention discloses an ex-situ prevulcanization method of a hydrogenation catalyst. The method comprises the following steps: (1) uniformly mixing a vulcanizing agent with a hydrogenation catalyst in an oxidation state; (2) carrying out heat treatment on the mixture in the step (1); (3) adding a phosphorus-containing substance into the mixture obtained in the step (2); and (4) performing hydrogen treatment on the material obtained in the step (3) in the presence of hydrogen to obtain the presulfurized catalyst. According to the method, the ex-situ presulfurization process of the catalyst is improved, the activity of the catalyst is improved, the safety problem of hydrogen embrittlement of the reactor caused by too high initial activity temperature of the catalyst is avoided, and the safety problem of the storage, transportation and filling processes of the ex-situ presulfurization catalyst is also solved.

Description

technical field [0001] The invention relates to a hydrogenation catalyst presulfidation method, in particular to a hydrogenation catalyst presulfurization method outside the vessel. Background technique [0002] In recent years, the trend of inferior crude oil has become increasingly obvious, while the demand for clean fuels in various countries is increasing. Hydrogenation technology is one of the most effective means of producing clean fuels, and its efficient hydrogenation catalyst has become the key technology of hydrogenation technology. The active metals of conventional hydrogenation catalysts are in the oxidized state, but the active substances are in the sulfided state in actual use, so they need to be sulfided in the reactor before use. Conventional pre-sulfurization in the catalyst requires special equipment, which increases the production cost. The vulcanization process is easy to cause pollution and requires a long start-up time. [0003] In response to this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188B01J27/19B01J27/185B01J37/20B01J37/08B01J37/18C10G45/08
CPCB01J27/188B01J27/19B01J27/1853B01J37/20B01J37/08B01J37/18C10G45/08C10G2300/202
Inventor 高玉兰方向晨徐黎明佟佳杨涛王继锋
Owner CHINA PETROLEUM & CHEM CORP
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