Silicon trap for coker naphtha and application thereof

A technology for coking naphtha and silicon trapping agent, which is used in catalyst protection, physical/chemical process catalysts, chemical instruments and methods, etc.

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most coking naphtha hydrofining units do not use special silicon trapping agents, but choose conventional hydrofinishing catalysts with suitable properties, such as some hydrofining catalysts with large specific surface area and low active metal content, etc. Therefore, they often need to further improve the operating cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 100g of industrial alumina powder, add 3% nitric acid and 15% purified water, and mix for 3 hours. Then add silica sol to the mixture to make SiO in the final product 2 When the content reaches 9%, continue mixing for 3 hours, and extrude into a Φ2mm cylinder with an extruder. The extrudate was dried at 120°C for 2h and then calcined at 500°C for 3h to obtain product A.

Embodiment 2

[0021] Take 100g of industrial alumina powder, add 3% nitric acid and 15% purified water, and mix for 3 hours. Then add silica sol to the mixture to make SiO in the final product 2 When the content reaches 6%, continue mixing for 3 hours, and extrude into a Φ2mm cylinder with an extruder. The extrudate was dried at 120°C for 2h and then calcined at 500°C for 3h to obtain product B.

Embodiment 3

[0023] Take 100g of industrial alumina powder, add 3% nitric acid and 15% purified water, and mix for 3 hours. Then add silica sol to the mixture to make SiO in the final product 2 When the content reaches 3%, continue mixing for 3 hours, and extrude into a Φ2mm cylinder with an extruder. The extrudate was dried at 120°C for 2h and then calcined at 500°C for 3h to obtain product C.

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PUM

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Abstract

The invention discloses a silicon trap for coker naphtha and application thereof. In the silicon trap for the coker naphtha, alumina is taken as a carrier, silica is taken as an aid, W, Mo and Ni are taken as hydrogenation components, the pore volume of the silicon trap for the coker naphtha is 0.5-0.70ml/g, the specific surface area is 250-500m<2>/g, the hydrogenation components are 1 to 20 percent based on oxides, and the acid content is 0.3-0.5mmol/g. The silicon trap for the coker naphtha can effectively remove the silicon impurity contained in the coker naphtha, and protects a coker naphtha hydrofining catalyst against permanent deactivation caused by silicon poisoning.

Description

technical field [0001] The invention relates to a silicon trapping agent and its application, in particular to a silicon trapping agent used for protecting a main catalyst in the hydrofining process of coking naphtha and its application. Background technique [0002] The delayed coking process is an important means of producing light products from heavy crude oil. In order to prevent the foam from overflowing during the delayed coking process, silicon-containing compounds such as polydimethylsiloxane need to be added as defoamers. The defoamer decomposes into cyclosiloxanes with smaller molecules in the high temperature environment of the coking tower, such as hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane. These cyclosiloxanes are mainly distributed in coker naphtha, one of the products of coking. As a product of coking, coking naphtha also has the characteristics of high olefin content and easy carbon deposition and coking. [0003] After coking naphtha is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/02B01J33/00
Inventor 郭蓉杨成敏姚运海段为宇丁莉孙进
Owner CHINA PETROLEUM & CHEM CORP
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