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Method for recovering lubricating oil stock oil dewaxing solvent and method for lubricating oil stock oil dewaxing

A raw material oil and lubricating oil technology, which is applied in petroleum wax recovery, mineral wax recovery/refining, lubricating composition, etc., can solve the problems of high energy consumption and material consumption, and achieve the effects of reduced material consumption, simple operation, and low energy consumption

Active Publication Date: 2021-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for recovering lubricating oil stock oil dewaxing solvent and lubricating oil in order to overcome the problem of high energy consumption and material consumption in the process of rectifying and recovering organic solvents using ketone-benzene dewaxing equipment in the prior art. Method for Dewaxing Oil Raw Oil

Method used

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  • Method for recovering lubricating oil stock oil dewaxing solvent and method for lubricating oil stock oil dewaxing
  • Method for recovering lubricating oil stock oil dewaxing solvent and method for lubricating oil stock oil dewaxing
  • Method for recovering lubricating oil stock oil dewaxing solvent and method for lubricating oil stock oil dewaxing

Examples

Experimental program
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Effect test

Embodiment 1

[0055] (1) Stir and mix 140g of deasphalted lubricating oil base oil raw material with a crude oil boiling range of 557°C-700°C and 400g of ketonebenzene organic solvent at 30°C for a duration of 0.5h, and cool the resulting mixture to - Crystallize at 25°C and filter after 1 hour to obtain a filtrate containing dewaxed lubricating oil stock oil and ketonebenzene organic solvent. The ketonebenzene organic solvent used for dewaxing is a mixture formed by mixing methyl ethyl ketone and toluene, wherein the weight ratio of methyl ethyl ketone / toluene is 70:30;

[0056] (2) Add 500mL of ketone-benzene solvent mixed by methyl ethyl ketone and toluene to the mother liquor tank of membrane separation device, wherein the mass ratio of methyl ethyl ketone / toluene is 70:30, and the organic solvent-resistant nanofiltration membrane that will cut (this organic-resistant The solvent nanofiltration membrane is a P84 polyimide membrane with a molecular weight cut-off of 380Da prepared accord...

Embodiment 2

[0061] (1) Stir and mix 150g of deasphalted lubricating base oil raw material and 500g of ketonebenzene organic solvent at 32°C for 1h, cool the resulting mixture to crystallize at -20°C, and filter after 2h to obtain The filtrate of dewaxing lubricating oil stock oil and ketone benzene organic solvent, the ketone benzene organic solvent that dewaxing uses is the mixture that methyl ethyl ketone and toluene mix and form, and wherein the weight ratio of methyl ethyl ketone / toluene is 60:40;

[0062] (2) The concentrated solution in Example 1 is emptied, and the filtrate 500mL containing the dewaxed lubricating oil stock oil and the ketonebenzene organic solvent that step (1) obtains is added in the mother liquor tank, based on the total amount of the solution, The content of the dewaxed lubricating oil stock oil in the solution is 20% by weight, the weight ratio of methyl ethyl ketone / toluene in the solvent is 60:40, the system pressure is maintained at 3MPa, the temperature of ...

Embodiment 3

[0067] (1) Stir and mix 120g of deasphalted lubricating oil base oil raw material and 450g of ketonebenzene organic solvent at 35°C for 1h, cool the resulting mixture to crystallize at -15°C, and filter after 2h to obtain The filtrate of dewaxing lubricating oil stock oil and ketone benzene organic solvent, the ketone benzene organic solvent that dewaxing uses is the mixture that methyl ethyl ketone and toluene mix and form, and wherein the weight ratio of methyl ethyl ketone / toluene is 50:50;

[0068] (2) Add 500mL of ketone-benzene solvent mixed by methyl ethyl ketone and toluene to the mother liquid tank of membrane separation device, wherein the mass ratio of methyl ethyl ketone / toluene is 50:50, the organic solvent-resistant nanofiltration membrane (this organic-resistant The solvent nanofiltration membrane is a P84 polyimide membrane with a molecular weight cut-off of 330Da prepared according to the method disclosed in Example 7 of CN101678286A, and the membrane area is 0...

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Abstract

The invention relates to the technical field of lubricating oil raw material oil dewaxing technology, and discloses a method for recovering a lubricating oil raw material oil dewaxing solvent and a method for lubricating oil raw material oil dewaxing. The method for recovering the dewaxing solvent comprises contacting a solution containing lubricating oil stock oil and an organic solvent with a nanofiltration membrane, the nanofiltration membrane is a nanofiltration membrane prepared from P84 polyimide, and the molecular weight cut-off of the nanofiltration membrane is 280 ‑400Da, the contact pressure is 1‑6MPa, and the lubricating oil raw material oil is a fraction of crude oil with a boiling range in the range of 557‑700 °C. The average content of the organic solvent in the permeated liquid obtained by the recovery method provided by the invention is relatively high, and the effect of recovering the dewaxing solvent at normal temperature is better, and the process steps are simple; and the average flux of the nanofiltration membrane used in the method is relatively high. High, so that the energy consumption of the method is small, and the material consumption in the method is reduced.

Description

technical field [0001] The invention relates to the technical field of lubricating oil stock oil dewaxing technology, in particular to a method for recovering a lubricating oil stock oil dewaxing solvent and a method for lubricating oil stock oil dewaxing. Background technique [0002] Lubricating oil is the most widely used petrochemical product and the product closest to consumers. It is an important material related to the national economy, the people's livelihood and national security. It is called the "blood" of modern industry. At the same time, lubricating oil is a high-tech, high-efficiency product. From the analysis of the overall oil refining industry, the benefit of producing lubricating oil is obviously higher than that of fuel oil. In the production process of lubricating oil, since petroleum fractions contain long-chain n-alkanes, which are commonly referred to as "waxes", when the temperature drops, these "waxes" will wrap around the surrounding lubricating o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/22C10G73/23C10M177/00
CPCC10G73/22C10M177/00
Inventor 辛益双吴春红张杰
Owner CHINA PETROLEUM & CHEM CORP
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