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Hydrogenation catalysts precuring method and start working method of hydrogenation process

A hydrogenation catalyst and catalyst technology, which are applied in the directions of catalyst activation/preparation, chemical instruments and methods, and start-up of hydrotreating operations, can solve the problems affecting the on-time start-up of hydrogenation units, increased treatment costs, and large amount of catalyst, etc. Achieve the effect of reducing human body damage, uniform pre-vulcanization process and high vulcanization rate

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantage is that the amount of catalyst that needs to be presulfurized outside the device is large, the pretreatment process outside the device takes a long time, and the processing cost increases. In the case of short delivery time of presulfurized catalyst or large production tasks , which may affect the on-time start-up of the hydrogenation unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 50 g of the catalyst 100 g is impregnated in 10 g of organic solvent (organic solvent is coking kerosene fraction), the ratio of carbon number 9 to 12 in the organic solvent is not less than 50%, and the immersion time is 1 hour. Elemental sulfur 10g and 5g (NH 4 ) 2 S mixed. The impregnated catalyst was mixed with a vulcanizing agent, treated at 180° C. for 3 hours, and cooled naturally to obtain a pre-sulfided catalyst A. Mix the obtained presulfurized catalyst A with the remaining 50g of the unpresulfurized catalyst evenly, put it into a small reactor, and make it airtight, adjust the hydrogen partial pressure to 6.0MPa and start to raise the temperature at 20°C / h, and start to rise to 80°C Add vulcanized oil, and carry out closed-circuit circulation of the device. The vulcanized oil is straight-run kerosene, and the condition is that the volume ratio of hydrogen to oil is 350:1, and the volume space velocity is 2.0h -1 . When the temperature rises to 270°C, keep...

Embodiment 2

[0041] 70 g of the catalyst 100 g was immersed in 10 g of organic solvent (the organic solvent was a mixture of coker kerosene fraction and cottonseed oil at a volume ratio of 2:1), and the soaking time was 1 hour. Elemental sulfur 10g and 5g (NH 4 ) 2 S mixed. The impregnated catalyst was mixed with a vulcanizing agent, treated at 150° C. for 5 hours, and cooled naturally to obtain a pre-sulfided catalyst A. The obtained vulcanizing agent A and the remaining non-presulfurized catalyst are respectively loaded into a small reactor, and the presulfurized catalyst is loaded on the top of the remaining oxidation state catalyst. The airtightness is qualified, the hydrogen partial pressure is adjusted to 6.0MPa, and the temperature is raised at 20°C / h. When it rises to 80°C, the vulcanized oil is added, and the device is closed-circuited. The vulcanized oil is straight-run kerosene, and the condition is that the volume ratio of hydrogen to oil is 350:1. Volumetric space velocity ...

Embodiment 3

[0043] 30 g of the catalyst 100 g was immersed in 10 g of organic solvent (the organic solvent was a fraction of coked diesel oil), and the immersion time was 1 hour. Elemental sulfur 12g and 5g (NH 4 ) 2 S mixed. The impregnated catalyst was mixed with a vulcanizing agent, treated at 200° C. for 2 hours, and cooled naturally to obtain a pre-sulfided catalyst A. The obtained presulfided catalyst A and the oxidation state catalyst without presulfurization treatment are loaded into small reactors respectively, and the loading is to load the presulfided catalyst on the top of the oxidation state catalyst. The airtightness is qualified, the hydrogen partial pressure is adjusted to 6.0MPa, and the temperature is raised at 20°C / h. When it rises to 80°C, the vulcanized oil is added, and the device is closed-circuited. The vulcanized oil is straight-run kerosene, and the condition is that the volume ratio of hydrogen to oil is 350:1. Volumetric space velocity 2.0h -1 . When the t...

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Abstract

The invention discloses a method for precuring hydrogenation catalyst and a hydrogenation process operation method. During the presulfurization of the catalyst, intake of curing ingredient for partially precuring the catalyst is much more than theoretical sulfur demand of active hydrogenation metal in the catalyst. Precured hydrogenation catalyst and the hydrogenation catalyst which is not precured are mixed or layered in a reactor, and by operation and activation all catalyst is effectively cured. The method of the invention can precure the required catalyst, shorten the production period for precuring the catalyst, reduce the production cost and enhance economic benefit.

Description

technical field [0001] The invention relates to a presulfurization method of an oxidized hydrorefining catalyst and a method for starting a hydrogenation process using the catalyst. technical background [0002] Due to the slow growth of crude oil production and increasingly heavy quality, the demand for clean oil products in today's world is increasing, and the product quality requirements are becoming more and more stringent. The hydrogenation process of petroleum distillate is the main technology for producing clean oil products at present, and the preparation technology of hydrogenation catalyst is the key of hydrogenation technology. The active metal component of the hydrogenation catalyst prepared by the common method is in an oxidized state. Before the oxidized state catalyst is used in industry, the active metal must be converted into a sulfurized state to have a high catalytic activity. Therefore, the presulfidation of the catalyst has an important influence on the...

Claims

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Application Information

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IPC IPC(8): C10G45/04C10G49/24B01J37/20
Inventor 陈光高玉兰牛世坤曹凤兰李崇慧徐黎明
Owner CHINA PETROLEUM & CHEM CORP
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