Process of naphtha desulphurization

A process method and naphtha technology, which are applied in the petroleum industry, only in the multi-stage series refining process treatment, treatment of hydrocarbon oil, etc. The effect of mudding and preventing erosion

Inactive Publication Date: 2013-08-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a naphtha normal temperature desulfurization process to overcome the fact that in the existing naphtha normal temperature desulfurization process, the desulfurizer is easy to become muddy and hardened, which leads to bed blockage, which leads to the failure of normal production and forced shutdown inadequacies of

Method used

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  • Process of naphtha desulphurization
  • Process of naphtha desulphurization
  • Process of naphtha desulphurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This example gives a desulfurization effect of atmospheric and vacuum naphtha, the process used is shown in the attached figure 1 , single reactor desulfurization process. Sulfur-containing naphtha enters the settling tank 10 through pipeline A, is discharged from the lower pipeline B of the settling tank, enters the desulfurization reactor 20, and is discharged through the pipeline C after reacting with the desulfurizing agent; the water produced in the settling tank is discharged in time through the drain valve D ; The water generated by the reaction is discharged in time by the drain valve E.

[0036] Those skilled in the art can determine the corresponding operating conditions required by other raw materials and products through simple experiments according to the properties of raw materials and product quality requirements, combined with the knowledge in this field.

[0037] (1) The desulfurizer is an industrial catalyst produced by Beijing Sanju Company.

[0038...

Embodiment 2

[0048] Comparative example 1, the flow process that adopts sees attached figure 2 , double desulfurization reactor parallel process, other conditions remain unchanged. Sulfur-containing naphtha enters the settling tank 10 through pipeline A, is discharged from pipeline B at the lower part of the settling tank, enters desulfurization reactors 20 and 30 through pipelines C and D respectively, and passes through pipelines E, F and pipeline G respectively after reacting with desulfurizing agent Discharge device; the water produced by the settling tank is discharged in time by the drain valve H; the water generated by the reaction is discharged in time by the drain valves I and J.

Embodiment 3

[0050] Comparative example 1, the flow process that adopts sees attached image 3 , double desulfurization reactor series process, the sulfur-containing naphtha enters the settling tank 10 through the pipeline A, and is discharged from the lower part of the settling tank through the pipeline B, first enters the desulfurization reactor 20, and then enters the desulfurization reactor 30 through the pipeline C, and reacts with the desulfurization agent Finally, the device is discharged through the pipeline D; the water produced in the settling tank is discharged in time by the drain valve E; the water generated by the reaction is discharged in time by the drain valves F and G. Other conditions remain unchanged.

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Abstract

The invention relates to a process of naphtha desulphurization. The process comprises devices of a sedimentation tank and a desulphurization reactor, wherein size of the sedimentation tank is 2-3 times of that of the desulphurization reactor, a bottom of the sedimentation tank is provided with a draining valve; the desulphurization reactor is a fixed-bed desulphurization reactor, a bottom of the desulphurization reactor is filled with molecular sieves or ceramic ball inert substances, a desulfurizer is filled in the molecular sieves or the ceramic ball inert substances, a filled height of the molecular sieves or the ceramic ball inert substances is 1/10-1/3 of a filled height of the desulfurizer, and the bottom of the desulphurization reactor is provided with a draining valve. The naphtha is put into the sedimentation tank for sedimentation and dehydration, water generated in the sedimentation tank is discharged from the draining valve at the bottom, the dehydrated naphtha is put into the fixed-bed desulphurization reactor for desulphurization reaction, and water gathered at the bottom of the desulphurization reactor is discharged from the draining valve arranged at the bottom of the desulphurization reactor. The method can prevent damages of the water in the naphtha and the water generated during the reaction on desulfurizer strength, and thus the desulfurizer can be continuously used for more than one year.

Description

Technical field: [0001] The invention relates to a desulfurization process for distillates in petroleum refining, in particular to a desulfurization process for naphtha at normal temperature. Background technique: [0002] Naphtha is the product of primary and secondary processing of crude oil, and is the raw material for the production of olefins, aromatics, and gasoline. Whether it is an atmospheric and vacuum unit, or a hydrocracking, catalytic cracking, or delayed coking unit, the naphtha produced will contain a high concentration of sulfur. As a downstream raw material, the sulfur content in naphtha must first be reduced. The existing naphtha desulfurization technologies mainly include fixed bed hydrodesulfurization, catalytic distillation hydrodesulfurization, adsorption desulfurization and other processes. [0003] Chinese patents CN 1429888A, CN 101374932A, CN 101374931A, CN 101370581A, and CN 1988952A respectively disclose preparation methods of hydrodesulfurizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/00C10G53/08
Inventor 石洪波韩非郝春来邵子文董大清曹志涛王俊艳朱丹张黎英莫娅南闫小燕
Owner PETROCHINA CO LTD
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