Method for preparing deoiled wax

A technology for deoiling wax and deoiling, which is applied in petroleum wax recovery, mineral wax recovery/refining, petroleum industry, etc. It can solve the problem of low yield of deoiled wax and achieve the goal of reducing production energy consumption and usage Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defect that the yield of deoiled wax is low in the existing three-stage solvent deoilin

Method used

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  • Method for preparing deoiled wax
  • Method for preparing deoiled wax
  • Method for preparing deoiled wax

Examples

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Comparison scheme
Effect test

Embodiment 1

[0080] This example is used to illustrate the preparation of dewaxed oil and deoiled wax of the present invention.

[0081] The dewaxed raw oil is the minus four-line distillate oil, and its properties are shown in Table 1. Both the dewaxing dilution solvent and the washing solvent are mixtures of butanone and toluene, the weight content of butanone is 60%, and the weight content of toluene is 40%. The deoiling slurry solvent is the same as the dewaxing dilution solvent, and three-stage deoiling is adopted, the dewaxing solvent dilution ratio (the mass ratio of the dewaxing dilution solvent to the raw material oil) and the deoiling solvent slurry ratio (the ratio of the deoiling solvent to the raw material oil Mass ratio) and washing solvent wash ratio (weight ratio of washing solvent to raw oil) are relative to the raw oil.

[0082] according to figure 1 The shown process flow prepares dewaxed oil and deoiled wax, and the specific process is as follows:

[0083]Solvent dew...

Embodiment 2

[0089] This example is used to illustrate the preparation of dewaxed oil and deoiled wax of the present invention.

[0090] The dewaxed feedstock oil is refined oil with reduced third-line furfural, and its properties are shown in Table 1. Both the dewaxing dilution solvent and the washing solvent are mixtures of butanone and toluene, the weight content of butanone is 70%, and the weight content of toluene is 30%. The deoiling slurry solvent is the same as the dewaxing dilution solvent, and three-stage deoiling is adopted, the dewaxing solvent dilution ratio (the mass ratio of the dewaxing dilution solvent to the raw material oil) and the deoiling solvent slurry ratio (the ratio of the deoiling solvent to the raw material oil Mass ratio) and flushing ratio (weight ratio of washing solvent to raw oil) are relative to the raw oil.

[0091] according to figure 1 The shown process flow prepares dewaxed oil and deoiled wax, and the specific process is as follows:

[0092] Solven...

Embodiment 3

[0101] This example is used to illustrate the preparation of dewaxed oil and deoiled wax of the present invention.

[0102] The dewaxed raw oil is hydrotreated and lightly deoiled, and its properties are shown in Table 1. Both the dewaxing solvent and the washing solvent are mixtures of butanone and toluene, the weight content of butanone is 50%, and the weight content of toluene is 50%. The deoiling slurry solvent is the same as the dewaxing dilution solvent, and three-stage deoiling is adopted, the dewaxing solvent dilution ratio (the mass ratio of the dewaxing dilution solvent to the raw material oil) and the deoiling solvent slurry ratio (the ratio of the deoiling solvent to the raw material oil Mass ratio) and flushing ratio (weight ratio of washing solvent to raw oil) are relative to the raw oil.

[0103] according to figure 1 The shown process flow prepares dewaxed oil and deoiled wax, and the specific process is as follows:

[0104] Solvent dewaxing adopts multi-poi...

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Abstract

The invention discloses a method for preparing deoiled wax. The method comprises the following steps: under a dewaxing condition, performing solvent dewaxing on a mixture of raw oil and a dewaxing diluting solvent to obtain dewaxed filtrate and dewaxed cerate; performing a first stage of solvent deoiling on a mixture of the dewaxed cerate and a first deoiling slurrying solvent at a temperature lower than a dewaxing temperature to obtain first-stage deoiled cerate and first-stage deoiled filtrate; performing a second stage of solvent deoiling on a mixture of the first-stage deoiled cerate and a second deoiling slurrying solvent at a temperature higher than the first-stage deoiling temperature to obtain second-stage deoiled cerate and second-stage deoiled filtrate; and performing a third stage of solvent deoiling on a mixture of the second-stage deoiled cerate and a third deoiling slurrying solvent at a temperature lower than the second-stage deoiling temperature to obtain third-stage deoiled cerate and third-stage deoiled filtrate. The method disclosed by the invention has the advantages of increasing the yield of deoiled wax and the yield of dewax oil on the premise of satisfying the standard requirements of oil content of the deoiled wax, reducing the amount of a used fresh solvent and reducing the energy consumption.

Description

technical field [0001] The invention relates to a method for preparing deoiled wax. Background technique [0002] Traditional lube base oil production includes solvent refining, solvent dewaxing and supplementary refining processes. Vacuum distillate oil and light deasphalted oil are obtained through the above process to obtain lubricating oil base oil, and at the same time, wax paste is deoiled in solvent dewaxing to obtain deoiled wax, which is further refined to obtain petroleum wax products. In the production process arrangement, solvent refining can be arranged before solvent dewaxing, which is customarily called a forward sequence process, or solvent dewaxing can be arranged before solvent refining, which is customarily called a reverse sequence process. In addition, with the improvement of base oil quality requirements, hydrotreatment can be used instead of solvent refining, or light solvent refined oil is hydrotreated, and then solvent dewaxing is used to produce ba...

Claims

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Application Information

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IPC IPC(8): C10G73/22C10G73/23
CPCC10G73/22C10G2300/4006
Inventor 丁洛王玉章管翠诗王子军程志斌闫亮
Owner CHINA PETROLEUM & CHEM CORP
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