Method and device for deodorizing light oil product through dissolved oxygen

A technology of light oil and dissolved oxygen, which is applied in the direction of refining with oxygen-containing compounds, can solve the problems of hindering deodorization reaction, product yield reduction, oil color deepening, etc., to slow down oxidation side reactions, reduce processing losses, The effect of prolonging the service life

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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Problems solved by technology

[0004] This leads to the following situation: On the one hand, due to the excessive air injection, more air phases (bubbles) appear in the deodorization reaction zone, which reduces the contact area between the oil and the catalyst flowing into the deodorization reaction zone, and the oxidation of mercaptans It is difficult to carry out the reaction in a homogeneous state, the deodorization reaction efficiency may not increase but decrease, and it is easy to cause pressure drop, which is not conducive to the smooth operation. On the other hand, excessive air will increase unnecessary side reactions, causing The excessive oxidation of unstable substances in oil (especially conjugated substances such as conjugated dienes, conjugated phenols, conjugated nitrogen compounds, etc.) will deepen the color of the oil and increase the number of oxidized colloids. On the one hand, it covers the active center, hinders the deodorization reaction, and shortens the life of the catalyst. The air will carry more light hydrocarbons in the deodorized tail gas, resulting in a decrease in product yield, and it is also not conducive to the sedimentation and purification of the deodorized product in the product collector

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  • Method and device for deodorizing light oil product through dissolved oxygen
  • Method and device for deodorizing light oil product through dissolved oxygen

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Embodiment 1

[0037] Take 10 mL of 20-30 mesh copper molecular sieve catalyst (trade name RCu-01, provided by Sinopec Catalyst Branch) and fill it in the reactor. After heating to the reaction temperature, inject the light oil to be deodorized together with air into the oxygen-dissolving container , and then injected into a fixed bed reactor for deodorization reaction. The light oil product to be deodorized is an aviation jet fuel A (density 0.7842g / cm 3 , the distillation range is 142-224°C, and its mercaptan sulfur content is 75μg / g. The deodorization reaction conditions are: temperature 90°C, pressure 0.5MPa, volume liquid hourly space velocity 2.0h -1 , the tail gas passes through the back pressure fine-tuning valve and then enters the precision wet gas flow meter for reading, so as to maintain the same pressure in the entire reaction system, that is, to maintain the same pressure in the reactor and the post-reaction product collector. The air flow rate is 20mL / h.

Embodiment 2

[0045] according to figure 2 As shown in the diagram of the device, a simulated micro-reflector device was assembled in the laboratory. Take 10mL of 20-30 mesh metal phthalocyanine catalyst (activated carbon supported sulfonated cobalt phthalocyanine, the mass fraction of sulfonated cobalt phthalocyanine is 1%) and put it in the reactor. After heating to the reaction temperature, put the deodorized light oil Together with the air, it is passed into the deodorization device for deodorization reaction. The light oil product to be deodorized is certain catalytic cracking gasoline (density 0.7332g / cm 3 , the distillation range is 33~196℃, and its mercaptan sulfur content is 35μg / g). The deodorization reaction conditions are: temperature 40°C, pressure 0.5MPa, volume liquid hourly space velocity 2.0h -1 , the tail gas passes through the back pressure fine-tuning valve and then enters the precision wet gas flow meter for reading, so as to maintain the same pressure in the entire...

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Abstract

The invention provides a method and a device for deodorizing a light oil product through dissolved oxygen. The method comprises the following steps of: mixing the light oil product and air in a mixer, and then adding the light oil product into a dissolved oxygen container, wherein excess air is exhausted through an air-liquid interface control system in the dissolved oxygen container; adding the light oil product into a fixed bed reactor, and contacting the light oil product with a fixed bed oxidation catalyst; collecting the fixed bed oxidation catalyst subjected to a deodorizing reaction. According to the method and the device, on one hand, the pressure of a reaction system can be well kept in a balanced state to enable liquid-stage fluid to uniformly flow in the reactor, and on the other hand, by the reaction of mercaptan and the dissolved oxygen in the light oil product in a homogeneous state, the deodorizing efficiency can be effectively improved, and an unnecessary oxidization side reaction is avoided or slowed, so that phenomena of color deepening and colloid over-generation caused by over-oxidization of the oil product are avoided, the service life of the catalyst is prolonged, the processing loss is reduced, and the yield of the light oil product is improved.

Description

technical field [0001] The invention relates to a method and device for deodorizing light oil products with dissolved oxygen, in particular to a kind of light oil products such as naphtha, aviation jet fuel, gasoline, kerosene, diesel oil, liquefied petroleum gas, etc. A method and device for removing mercaptan sulfur contained therein by oxygen. Background technique [0002] For well-known light oil products such as unleaded gasoline for vehicles, the national standard GB17930 stipulates that the mercaptan sulfur content is not greater than 10μg / g; for No. 3 jet fuel widely used in my country, the national standard GB6537 stipulates that the mercaptan sulfur content is not greater than 20μg / g. Therefore, for light oil products, if the mercaptan sulfur contained therein does not meet the specification requirements of commercial products, hydrogenation or non-hydrogenation refining treatment must be carried out. The non-hydrodemercaptan refining of oil products is deodoriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/06
Inventor 潘光成李涛吴明清陶志平常春艳赵丽萍
Owner CHINA PETROLEUM & CHEM CORP
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