Pretreatment method for crude lube stock

A lubricating oil and pretreatment technology, which is applied in the treatment of hydrocarbon oil, lubricating composition, hydrotreating process, etc., can solve the problems of poor pretreatment effect of lubricating oil fractions, achieve effective utilization of overall activity, appropriate pore distribution, increase The effect of permeability

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of poor pretreatment of lubricating oil fractions in existing hydrofining methods, and to provide a more effective method for pretreatment of lubricating oil raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]Second-line acid-containing distillate oil and hydrogen are contacted with hydrogenation protection agent, hydrogenation catalyst A and hydrogenation catalyst B in a fixed-bed reactor, at a hydrogen partial pressure of 3.4MPa, a reaction temperature of 310°C, and a hydrogen-to-oil volume ratio of 400Nm 3 / m 3 , volumetric space velocity 1.0h -1 The hydrogenation reaction is carried out under certain conditions, and the reaction product is cooled and separated to obtain hydrogen-rich gas and liquid products. The obtained hydrogen-rich gas is recycled back to the reactor inlet, and the obtained liquid product is stripped by a stripping tower to remove hydrogen sulfide and other gases. After light components, the resulting liquid is hydrorefined oil. See Table 3 for the properties of the second-line acid-containing distillate oil, and Table 4 for the properties of the hydrotreated oil.

Embodiment 2

[0030] Minus three-line acid-containing distillate oil and hydrogen are in contact with hydrogenation protection agent, hydrogenation catalyst A and hydrogenation catalyst B in a fixed-bed reactor, at a hydrogen partial pressure of 3.4MPa, a reaction temperature of 320°C, and a volume ratio of hydrogen to oil 400Nm 3 / m 3 , volumetric space velocity 0.8h -1 The hydrogenation reaction is carried out under certain conditions, and the reaction product is cooled and separated to obtain hydrogen-rich gas and liquid products. The obtained hydrogen-rich gas is recycled back to the reactor inlet, and the obtained liquid product is stripped by a stripping tower to remove hydrogen sulfide and other gases. After light components, the resulting liquid is hydrorefined oil. See Table 3 for the properties of the second-line acid-containing distillate oil, and Table 4 for the properties of the hydrotreated oil.

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Abstract

The invention relates to a pretreatment method for a crude lube stock. According to the invention, an acid-containning crude lube stock and hydrogen contact with hydrotreatment catalysts and undergo a hydrogenation reaction in a fixed bed reactor; reaction materials successively pass through a protective agent, a hydrotreatment catalyst A and a hydrotreatment catalyst B; a resultant of the reaction is subjected to gas-liquid separation, an obtained gas phase is recycled for the hydrogenation reaction, and an obtained liquid phase is used for production of lubricant base oil; the hydrotreatment catalyst A and the hydrotreatment catalyst B have proper pore distribution and composition. The method provided by the invention overcomes the disadvantage of poor pretreatment effect of a conventional hydrorefining method on a lubricating oil distillate raw material, and hydrofined oil is an excellent furfural refining raw material.

Description

technical field [0001] The invention relates to a method for pretreatment of lubricating oil raw materials. technical background [0002] Worldwide, naphthenic crude oil is a lesser petroleum resource. A survey of the world's 115 largest oilfield reserves estimates that naphthenic crude oil accounts for about 2.4%. Due to the unique characteristics of naphthenic crude oil, it becomes a high-quality raw material for the production of low freezing point jet fuel and low freezing point fuel, and also an ideal raw material for the production of special lubricating oil raw materials and high-quality asphalt. [0003] Naphthenic crude oil is a heavy high-acid crude oil. If the distillate oil is not deacidified and directly enters the furfural-clay refining unit, it will cause corrosion to pipelines and equipment, shorten the operating cycle of the unit, and seriously affect the performance of the furfural-clay refining unit. long-term operation. At the same time, because the lu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10M177/00
Inventor 高景山朴勇齐慧敏刘璐戴金玲
Owner CHINA PETROLEUM & CHEM CORP
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