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Hydroconversion method of high-wax-content raw material

A technology for hydrogenation conversion and raw materials, which is applied in the fields of hydroprocessing technology, petroleum industry, hydrocarbon oil treatment products, etc. Low rate and other issues

Active Publication Date: 2021-05-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above process, in the hydrodewaxing operation unit, the disadvantages of using the traditional hydroisomerization dewaxing catalyst are that it is difficult to make light and Heavy base components meet both pour point and viscosity index requirements
When traditional hydrocracking catalysts are used, whether whole fraction or broad fraction waxy oil is used as feed, most light and heavy base oil products can meet the requirements of pour point and viscosity index at the same time, but the process produces a large amount of cracked products , the yield of light and heavy base oil is too low, seriously affecting the process economy
However, by fractionating the raw material, using narrow fraction Fischer-Tropsch wax as the feed method for hydroisomerization dewaxing, or a more complicated feed method for cyclic hydroisomerization dewaxing, to a certain extent, can solve the current production of light There are problems of low yield and poor product performance when using high-quality and heavy high-viscosity index lubricating base oils, but it is necessary to set up multiple raw material tanks and multiple separators, which increases the construction investment of the device; and in actual production, often Switching raw materials and frequently adjusting process parameters increase the difficulty of device operation and produce a large number of substandard products

Method used

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Experimental program
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Effect test

Embodiment 1

[0052] The hydrogenation pretreatment catalyst H1 is used in the hydrogenation pretreatment reactor, and the reaction conditions are 250°C, 4MPa, and the space velocity is 2.0h -1 , the ratio of hydrogen to oil is 500; the hydroisomerization reactor adopts hydroisomerization catalysts A and B, and the loading method of both is A above B, and the loading volume ratio is 1:1. The reaction conditions are 320°C, 12MPa, and space velocity 0.8h -1 , the ratio of hydrogen to oil is 500; the hydrofinishing reactor adopts hydrofinishing catalyst H2, and the reaction conditions are 220°C, 5MPa, and space velocity 1.0h -1 , Hydrogen oil ratio 500. After the raw materials shown in Table 1 are converted and fractionated by the reaction process, the product yields obtained are shown in Table 2, and the properties of the base oil products are shown in Table 3.

Embodiment 2

[0054] The hydrogenation pretreatment catalyst H1 is used in the hydrogenation pretreatment reactor, and the reaction conditions are 230°C, 4MPa, and the space velocity is 2.0h -1 , the ratio of hydrogen to oil is 600; the hydroisomerization reactor adopts hydroisomerization catalysts A and B, the loading method of both is A above B, the loading volume ratio is 1:2, and the reaction conditions are 325°C, 13MPa, and space velocity 0.8h -1 , the ratio of hydrogen to oil is 500; the hydrofinishing reactor uses hydrofinishing catalyst H2, and the reaction conditions are 240°C, 6MPa, and space velocity 1.0h -1 , Hydrogen oil ratio 500. After the raw materials shown in Table 1 are converted and fractionated by the reaction process, the product yields obtained are shown in Table 2, and the properties of the base oil products are shown in Table 3.

Embodiment 3

[0056] The hydrogenation pretreatment catalyst H1 is used in the hydrogenation pretreatment reactor, and the reaction conditions are 270°C, 5MPa, and the space velocity is 2.0h -1 , the ratio of hydrogen to oil is 600; the hydroisomerization reactor adopts hydroisomerization catalysts A and B, and the loading method of both is A above B, and the loading volume ratio is 1:3. The reaction conditions are 310°C, 15MPa, and space velocity 0.8h -1 , the ratio of hydrogen to oil is 500; the hydrofinishing reactor uses hydrofinishing catalyst H2, and the reaction conditions are 240°C, 6MPa, and space velocity 1.0h -1 , Hydrogen oil ratio 500. After the raw materials shown in Table 1 are converted and fractionated by the reaction process, the product yields obtained are shown in Table 2, and the properties of the base oil products are shown in Table 3.

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Abstract

The invention relates to a hydro-conversion method of a high-wax-content raw material. The method comprises the following steps that the high-wax-content raw material firstly enters a hydrogenation pretreatment reaction zone, and hydrogenation saturation, hydrodesulfurization, hydrodenitrogenation and hydrodeoxygenation of non-alkane components in the raw material are completed; the obtained hydrogenated pretreated oil enters a hydroisomerization reaction zone, and hydroisomerization of the hydrogenated pretreated oil is completed on a specific combined hydroisomerization catalyst; the obtained hydroisomerized oil enters a hydrofining reaction zone for further treatment to obtain a crude product; and the crude product is fractionated through a normal / vacuum tower to obtain base oil, diesel oil, gasoline and other products. Compared with the prior art, the method disclosed by the invention has the advantages that the low-pour-point and high-viscosity-index base oil with higher yield can be obtained, the process is simple, and the energy consumption is lower.

Description

technical field [0001] The invention relates to a method for hydrogenation conversion of high-waxy raw materials, in particular to a method using Fischer-Tropsch synthetic wax, vacuum distillate oil, propane deasphalted oil, hydrocracking tail oil, wax paste and wax bottom oil as raw materials. Hydroconversion is a method of producing base oil as the main product. Background technique [0002] With the increasing trend of crude oil becoming heavier and inferior and the environmental protection regulations becoming stricter, the performance requirements of refined oil are becoming higher and higher. In this context, the rate of improvement of lubricating oil standards is also accelerating. For the base oils of Class I produced by traditional processes, they can no longer meet the current use needs. Advanced lubricating oil base oil production processes have been developed to produce Class II, Type III and natural gas synthetic oil base oils can realize the expansion and upgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/202C10G2300/70C10G2400/10
Inventor 王从新田志坚曲炜马怀军潘振栋王冬娥李鹏王琳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI