A kind of dewaxing solvent and using method thereof

A dewaxing solvent and dewaxing technology, which is applied in the field of petroleum refining lubricating oil, can solve the problems of low dewaxing temperature, poisoning, large refrigeration energy consumption, etc., and achieve the effect of easy operation, easy realization and saving cooling capacity

Active Publication Date: 2016-05-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, due to the certain toxicity of butanone and toluene, there is a certain poisonous effect in the production process, and the dewaxing temperature is relatively low, which requires a large amount of refrigeration energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 2080g of dimethyl carbonate and 520g of pinane and mix them to prepare a dewaxing solvent, then weigh 500g of raw oil and 2500g of dewaxing solvent and pour them into a beaker together for magnetic stirring and mixing. Heat the mixed liquid in a water bath to 45°C. After the raw material oil is completely dissolved, slowly lower the temperature and cool it to -10°C to slowly crystallize the wax. wax. The dewaxing filtrate obtained after dewaxing was taken, and the lubricating oil base oil was obtained after the dewaxing filtrate was removed from the dewaxing solvent, and the yield of the lubricating oil base oil was 52%.

Embodiment 2

[0025] Weigh 800 g of dimethyl carbonate and 400 g of pinene and mix them to prepare a dewaxing solvent, then weigh 500 g of raw material oil and 1000 g of dewaxing solvent and pour them into a beaker together for magnetic stirring and mixing. Heat the mixed liquid in a water bath to 45°C. After the raw material oil is completely dissolved, slowly lower the temperature and cool it to -8°C, so that the wax will slowly crystallize and precipitate. wax. The dewaxing filtrate obtained after dewaxing is taken, and the lubricating oil base oil is obtained after the dewaxing filtrate is removed from the dewaxing solvent, and the yield of the lubricating oil base oil is 45%.

Embodiment 3

[0027] Weigh 3000g of dimethyl carbonate to prepare a dewaxing solvent, then weigh 500g of raw material oil and 3000g of dewaxing solvent and pour them into a beaker together for magnetic stirring and mixing. Heat the mixed liquid in a water bath to 45°C. After the raw material oil is completely dissolved, slowly lower the temperature and cool it to -5°C, so that the wax will slowly crystallize and precipitate. wax. The dewaxing filtrate obtained after dewaxing was taken, and the lubricating oil base oil was obtained after the dewaxing filtrate was removed from the dewaxing solvent, and the yield of the lubricating oil base oil was 56%.

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Abstract

The invention discloses a dewaxing solvent which comprises the following components: at least one of dimethyl carbonate, pinane and pinene. A dewaxing method using the dewaxing solvent comprises the following steps: adding the solvent into raw oil, heating the solvent in the raw oil to dissolve the solvent, then cooling to separate wax crystal in the raw oil, and filtering to remove the wax in the raw oil, wherein the filtering temperature is -10 DEG C to 5 DEG C when the wax crystal in the raw oil is removed through filtering. The dewaxing solvent used in the invention is non-toxic and non-hazardous, the dewaxing process is safe and easy to operate, the dewaxing temperature in the dewaxing process is easy to achieve, so that the refrigerating capacity is reduced in the dewaxing process, and the energy consumption is reduced; furthermore, the flashing points of various components in the solvent are relatively high, so that the fire and explosion protection property is relatively high in the operation field. The dewaxing method further has the advantages that the heat of evaporation of the solvent used in the invention is less than that of methylbenzene or butanone of the traditional dewaxing solvent, the solvent is easy to recover in distillation, and the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of petroleum refining lubricating oil, and relates to a raw material oil dewaxing method. Background technique [0002] Solvent dewaxing is an important process in the production of lubricating base oils. Due to the different weights of waxy oils and the different requirements for freezing point, there are many methods of dewaxing. At present, the methods of lubricating oil dewaxing used in industry can be roughly divided into three categories: 1. Crystallization dewaxing: Utilizing the property that wax can crystallize and precipitate from solution at low temperature, the precipitated wax is removed by filtration to make the freezing point of lubricating oil process of lowering. The methods belonging to this category include cold press dewaxing, centrifugal dewaxing, solvent dewaxing, etc. Among them, solvent dewaxing includes: ketone-benzene dewaxing, propane dewaxing, acetone-propylene dewaxing, olefin ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/12C10G73/22C10G73/10
Inventor 陈小鹏梁杰珍王琳琳谢丹丹张铭计建忠韦炜潘红云
Owner GUANGXI UNIV
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