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Waste lubricating oil deep refining process and system

A waste lubricating oil, advanced refining technology, which is applied in the direction of lubricating compositions, etc., can solve the problems of excessive refining agent addition, energy waste, waste of resources and the environment, and achieve cost savings in advanced refining, reduce solvent usage, and reduce impurity content Effect

Active Publication Date: 2020-09-08
山西新鸿顺能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2010, my country's lubricating oil consumption exceeded 10 million tons, and nearly 9.5 million tons of waste lubricating oil were produced. Less than 10% of these waste lubricating oils were recycled, and most of them were dumped or incinerated on the spot, which wasted a lot Resources have caused serious environmental pollution
[0004] However, in the prior art, the recovery rate of waste lubricating oil in my country is very low, which has caused great energy waste and environmental pollution, and the conventional refining method is to use solvent refining alone or use other refining agents alone to carry out hydrogenation or cracking refining. The above method The amount of refined preparation used in the process is large, the cost is high, and it is difficult to obtain the lubricating oil chromaticity and rotational oxygen and nitrogen to meet the national standard

Method used

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  • Waste lubricating oil deep refining process and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A waste lubricating oil advanced refining process system has the following structure:

[0051] Including heater 1, refining reactor 2, heating furnace 3, fractionation tower 4, cooler 5, receiving tank 6 and vacuum pump 7; refining reactor 2 includes inlet one 21, inlet two 22, outlet 23 And gas outlet one 24; Feed port one 21 links to each other with heater 1; Fractionation column 4 comprises feed port three 41, feed port four 42, gas outlet two 43, first side line 44, second side line 45 and fractionation remaining Material outlet 46; feed port three 41 is communicated with gas outlet one 24, and feed port four 42 is communicated with discharge port 23, and also includes heating furnace 3 between feed port four 42 and discharge port 23, gas outlet two 43 is connected in series with cooler 5, receiving tank 6 and vacuum pump 7 through pipelines in sequence.

[0052] working principle:

[0053] After the preliminary refined waste lubricating oil (i.e. crude oil) is he...

Embodiment 2

[0056] A deep refining process for waste lubricating oil, comprising the following steps:

[0057] (1) Preliminarily refining the waste lubricating oil by a conventional method to obtain crude oil;

[0058] (2) The crude oil is heated to 200°C by the heater 1 and then enters the refining reactor 2, mixed with furfural at a mass ratio of 0.75:1, and solvent refined in the refining reactor 2. After the solvent is sufficiently refined, the alkaline additive sodium hydroxide is added, and the solvent-refined crude oil and sodium hydroxide are catalytically polymerized for 2 hours under normal pressure at a reaction temperature of 200° C. to obtain the base oil.

[0059] (3) Make the base oil enter the heating furnace 3 for heating, and the heating temperature is 330°C.

[0060] (4) The heated base oil obtained in step (3) enters the fractionation tower 4 for fractionation, wherein the fractionation pressure is an absolute pressure of 150 Pa, and the first-line refined oil is sepa...

Embodiment 3

[0063] A deep refining process for waste lubricating oil, comprising the following steps:

[0064] (1) Preliminarily refining the waste lubricating oil by a conventional method to obtain crude oil;

[0065] (2) The crude oil is heated to 190°C by the heater 1 and then enters the refining reactor 2, mixed with methyl pyrrolidone at a mass ratio of 0.6:1, and solvent refined in the refining reactor 2. After the solvent is sufficiently refined, the alkaline additive sodium hydroxide is added, and the solvent-refined crude oil and sodium hydroxide are catalyzed and polymerized under normal pressure for 1 hour at a reaction temperature of 190° C. to obtain a base oil.

[0066] (3) Make the base oil enter the heating furnace 3 for heating, and the heating temperature is 350°C.

[0067] (4) The heated base oil obtained in step (3) enters the fractionation tower 4 for fractionation, wherein the fractionation pressure is an absolute pressure of 100 Pa, and the first-line refined oil i...

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Abstract

The invention discloses a waste lubricating oil deep refining process and system, and belongs to the technical field of waste lubricating oil recovery. The process comprises the following steps: (1) pretreating: carrying out primary refining on waste lubricating oil through a conventional method to obtain crude oil; (2) performing solvent refining: mixing the crude oil with an organic solvent, andcarrying out solvent refining to obtain solvent-refined crude oil; (3) performing alkali refining: fully mixing the solvent-refined crude oil with an alkaline additive, and carrying out catalytic polymerization at 180-220 DEG C for 1-2 hours to obtain base oil; and (4) fractionating: fractionating the base oil at 250-350 DEG C to obtain first-line lubricating oil and second-line lubricating oil.The chromaticity and rotary oxygen and nitrogen of the recycled waste lubricating oil are superior to those of the prior art. Besides, when the deep refining step is matched with solvent refining, theuse amount of the organic solvent is greatly reduced, the recovery cost of the waste lubricating oil is reduced, and industrial popularization is facilitated.

Description

technical field [0001] The invention relates to the technical field of waste lubricating oil recovery, and more specifically relates to a waste lubricating oil advanced refining process and system. Background technique [0002] Waste lubricating oil refers to the used lubricating oil replaced from various machinery, vehicles, and ships. According to incomplete statistics, the consumption of lubricating oil in my country has been increasing year by year in recent years. In 2010, my country's lubricating oil consumption exceeded 10 million tons, and nearly 9.5 million tons of waste lubricating oil were produced. Less than 10% of these waste lubricating oils were recycled, and most of them were dumped or incinerated on the spot, which wasted a lot Resources have caused serious environmental pollution. [0003] Lubricating oil accounts for an important part of the world's petroleum product consumption, and its consumption is second only to fuel oil. With the rapid development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
CPCC10M175/0016C10M175/0033C10M175/0025C10M175/0083
Inventor 候建乐王小伟
Owner 山西新鸿顺能源有限公司
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