CN111849603A - Waste lubricating oil extract solution dissolving and regenerating process - Google Patents
Waste lubricating oil extract solution dissolving and regenerating process Download PDFInfo
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- CN111849603A CN111849603A CN202010698906.0A CN202010698906A CN111849603A CN 111849603 A CN111849603 A CN 111849603A CN 202010698906 A CN202010698906 A CN 202010698906A CN 111849603 A CN111849603 A CN 111849603A
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- extract
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/005—Working-up used lubricants to recover useful products ; Cleaning using extraction processes; apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0025—Working-up used lubricants to recover useful products ; Cleaning by thermal processes
- C10M175/0033—Working-up used lubricants to recover useful products ; Cleaning by thermal processes using distillation processes; devices therefor
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0083—Lubricating greases
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- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to a waste lubricating oil extract solution dissolving and regenerating process, which comprises the following steps: s1, carrying out primary extraction on distillate oil by utilizing NMP to prepare extract liquid and raffinate, and carrying out reduced pressure distillation on the extract liquid to prepare extract oil and NMP gas; s2, performing primary extraction on the distillate oil by utilizing NMP to prepare extract liquid and raffinate, and performing secondary extraction on the extract liquid and the distillate oil to prepare secondary extract liquid and secondary raffinate; and S3, performing tertiary extraction on the extract oil in the step S1 by using the secondary extract in the step S2 to obtain tertiary extract and tertiary raffinate. According to the process for dissolving and regenerating the waste lubricating oil extract, the extract oil is extracted for three times by utilizing the extraction capacity of the secondary extract, so that the base oil in the extract oil can be replaced, the extract oil with higher non-base oil content can be obtained, and the content of heavy aromatic oil can reach more than 80%, and the extract oil can be used as a rubber lubricant.
Description
Technical Field
The invention belongs to the technical field of bean product processing equipment, and particularly relates to a device for recycling water for soaking and cleaning soybeans and a production process thereof.
Background
The lubricating oil is composed of base oil and a certain amount of additives, and after the lubricating oil is used for a period of time, the normal function of the lubricating oil is lost due to the introduction of impurities, the deterioration of the additives and the like, so that the lubricating oil becomes waste lubricating oil. With the development of technology and the improvement of environmental protection requirements, the waste lubricating oil can be treated to obtain regenerated base oil, and the method comprises the following specific steps: the method comprises the steps of firstly carrying out reduced pressure distillation to generate distillate oil, and then extracting the distillate oil by a polar solvent NMP (N-Methyl pyrrolidone) to obtain raffinate (90% oil + 10% NMP) and extract (90% NMP + 10% oil), wherein the raffinate is further treated to obtain an oil product, and the extract is subjected to reduced pressure distillation again to obtain NMP gas and extract oil (60% non-base oil + 40% base oil).
In addition, the extraction process is primary extraction, and a part of NMP in the primary extract obtained after the primary extraction does not participate in dissolution, so that the primary extract still has a certain extraction capacity, so that the primary extract can be used for secondary extraction (also called an extraction process) of distillate oil, and the amount of the NMP and the NMP are properly increased, and a secondary extract (extract) and a secondary raffinate (raffinate) are obtained after the secondary extraction, wherein the secondary extract contains NMP and extract oil.
Extract oil obtained by the reduced pressure distillation of the primary extract contains 60% of non-base oil and 40% of base oil, wherein 60% of the non-base oil contains 90% of heavy aromatic oil, the proportion of the heavy aromatic oil in the extract oil is 40% -60%, the heavy aromatic oil can be used as a rubber lubricant, but the heavy aromatic oil can be used as the rubber lubricant when the proportion of the heavy aromatic oil in the extract oil is more than 80%, and researches show that secondary extract generated by secondary extraction has certain extraction capability, but the process of carrying out tertiary extraction on the extract oil by using the secondary extract is not adopted at present, so that the purposes of the secondary extract and the extract oil are reduced, and certain resource waste is also caused.
Disclosure of Invention
The invention aims to solve the problems and provide a process for dissolving and regenerating the waste lubricating oil extract, which has a simple structure and reasonable design.
The invention realizes the purpose through the following technical scheme:
a process for dissolving and regenerating waste lubricating oil extract comprises the following steps:
s1, carrying out primary extraction on distillate oil by utilizing NMP to prepare extract liquid and raffinate, and carrying out reduced pressure distillation on the extract liquid to prepare extract oil and NMP gas;
S2, performing primary extraction on the distillate oil by utilizing NMP to prepare extract liquid and raffinate, and performing secondary extraction on the extract liquid and the distillate oil to prepare secondary extract liquid and secondary raffinate;
s3, performing tertiary extraction on the extract oil in the step S1 by using the secondary extract in the step S2 to obtain tertiary extract and tertiary raffinate, and performing reduced pressure distillation on the tertiary extract and the tertiary raffinate to obtain extract oil, raffinate oil and NMP gas;
step S4, condensing and recycling the NMP gas prepared in the step S1 and the step S3 for one-time extraction.
As a further optimization scheme of the invention, the volume ratio of the secondary extract to the extract oil in the step S3 is 5-6: 1.
As a further optimization scheme of the invention, the volume ratio of the distillate oil to the NMP in the step S1 and the step S2 is 1-1.5: 1.
The invention has the beneficial effects that:
1) according to the invention, the extract oil is extracted by the secondary extract obtained by secondary extraction, and because the extract oil obtained after the primary extract is subjected to reduced pressure distillation contains 60% of non-base oil and 40% of base oil, wherein the content of heavy aromatic oil is 40% -60%, and the secondary extract comprises extract oil and NMP, the non-base oil and NMP in the secondary extract can effectively replace the base oil in the extract oil obtained by the reduced pressure distillation of the extract, so that after the extract oil obtained by the reduced pressure distillation of the primary extract is extracted by the secondary extract obtained by secondary extraction, the base oil in the extract oil obtained by the reduced pressure distillation of the primary extract can be replaced, the content of heavy aromatic oil in the extract oil obtained finally exceeds 80%, and the extract oil obtained finally can be used as a rubber lubricant;
2) The invention extracts the extract oil by utilizing the extraction capacity of the secondary extract, reduces the energy consumption compared with the conventional process, and greatly improves the utilization rate of resources.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As mentioned in the above background art, the extract oil obtained by the vacuum distillation of the primary extract contains 60% of non-base oil + 40% of base oil, wherein 60% of the non-base oil contains 90% of heavy aromatic oil, the proportion of the heavy aromatic oil in the extract oil is 40% -60%, and the heavy aromatic oil can be used as a rubber lubricant, but the heavy aromatic oil can be used as a rubber lubricant only when the proportion of the heavy aromatic oil in the extract oil is more than 80%, and researches show that the secondary extract produced by the secondary extraction has a certain extraction capability, but the process of performing tertiary extraction on the extract oil by using the secondary extract is not available at present, so that the uses of the secondary extract and the extract are reduced, and a certain resource waste is also caused, and therefore, a process for dissolving and regenerating the extract of the waste lubricating oil is provided to solve the above technical problems.
Example 1
As shown in fig. 1, a process for dissolving and regenerating a spent lubricating oil extract comprises the following steps:
s1, carrying out primary extraction on distillate oil by utilizing NMP (N-methyl pyrrolidone) to prepare extract liquid and raffinate, wherein the volume ratio of the distillate oil to the NMP is 1-1.5: 1, and carrying out reduced pressure distillation on the extract liquid to prepare extract oil and NMP gas, wherein the extract oil contains 60% of non-base oil and 40% of base oil, 60% of the non-base oil contains 90% of heavy aromatic oil, and the heavy aromatic oil accounts for 40-60% of the extract oil;
s2, carrying out primary extraction on the distillate oil by utilizing NMP to prepare extract liquid and raffinate, wherein the volume ratio of the distillate oil to the NMP is 1-1.5: 1, carrying out secondary extraction on the extract liquid and the distillate oil to prepare secondary extract liquid and secondary raffinate, and finding that the secondary extract liquid obtained by the secondary extraction also has certain extraction capacity after research, wherein the extract liquid contains NMP and extract oil, and the extract oil in the step S1 can be extracted by utilizing the extraction capacity of the extract liquid;
s3, performing tertiary extraction on the extract oil in the step S1 by using the secondary extract in the step S2, wherein the volume ratio of the secondary extract to the extract oil is 5:1, preparing tertiary extract and tertiary raffinate after extraction, and performing reduced pressure distillation on the tertiary extract and the tertiary raffinate to prepare extract oil, raffinate oil and NMP gas, wherein the content of heavy aromatic oil in the obtained extract oil exceeds 80%, so that the extract oil meets the standard of being used as a rubber lubricant;
S4, condensing and recycling the NMP gas prepared in the S1 and S3 for primary extraction; this is the prior art and detailed description thereof is omitted here.
Example 2
As shown in fig. 1, a process for dissolving and regenerating a spent lubricating oil extract comprises the following steps:
s1, carrying out primary extraction on distillate oil by utilizing NMP (N-methyl pyrrolidone) to prepare extract liquid and raffinate, wherein the volume ratio of the distillate oil to the NMP is 1-1.5: 1, and carrying out reduced pressure distillation on the extract liquid to prepare extract oil and NMP gas, wherein the extract oil contains 60% of non-base oil and 40% of base oil, 60% of the non-base oil contains 90% of heavy aromatic oil, and the heavy aromatic oil accounts for 40-60% of the extract oil;
s2, carrying out primary extraction on the distillate oil by utilizing NMP to prepare extract liquid and raffinate, wherein the volume ratio of the distillate oil to the NMP is 1-1.5: 1, carrying out secondary extraction on the extract liquid and the distillate oil to prepare secondary extract liquid and secondary raffinate, and finding that the secondary extract liquid obtained by the secondary extraction also has certain extraction capacity after research, wherein the extract liquid contains NMP and extract oil, and the extract oil in the step S1 can be extracted by utilizing the extraction capacity of the extract liquid;
s3, performing tertiary extraction on the extract oil in the step S1 by using the secondary extract in the step S2, wherein the volume ratio of the secondary extract to the extract oil is 6:1, preparing tertiary extract and tertiary raffinate after extraction, and performing reduced pressure distillation on the tertiary extract and the tertiary raffinate to prepare extract oil, raffinate oil and NMP gas, wherein the content of heavy aromatic oil in the obtained extract oil exceeds 80%, so that the extract oil meets the standard of being used as a rubber lubricant;
S4, condensing and recycling the NMP gas prepared in the S1 and S3 for primary extraction; this is the prior art and detailed description thereof is omitted here.
It should be noted that the effect generated when the volume ratio of the secondary extract to the extract oil is 5-6: 1 is the same, the extraction effect is maximized, when the volume ratio of the secondary extract to the extract oil is 5-6: 1, the extraction effect is reduced, and when the volume ratio of the secondary extract to the extract oil is 5-6: 1, the extraction effect is unchanged, so that when the secondary extract is used for carrying out three-time extraction on the extract oil, the effect can be maximized and excessive resource waste cannot be caused only by controlling the volume ratio of the secondary extract to the extract oil to be 5-6: 1.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (3)
1. A waste lubricating oil extract solution dissolving and regenerating process is characterized by comprising the following steps:
s1, carrying out primary extraction on distillate oil by utilizing NMP to prepare extract liquid and raffinate, and carrying out reduced pressure distillation on the extract liquid to prepare extract oil and NMP gas;
s2, performing primary extraction on the distillate oil by utilizing NMP to prepare extract liquid and raffinate, and performing secondary extraction on the extract liquid and the distillate oil to prepare secondary extract liquid and secondary raffinate;
s3, performing tertiary extraction on the extract oil in the step S1 by using the secondary extract in the step S2 to obtain tertiary extract and tertiary raffinate, and performing reduced pressure distillation on the tertiary extract and the tertiary raffinate to obtain extract oil, raffinate oil and NMP gas;
step S4, condensing and recycling the NMP gas prepared in the step S1 and the step S3 for one-time extraction.
2. The process of claim 1, wherein the spent lubricating oil extract is regenerated by dissolution, and the process comprises the following steps: and in the step S3, the volume ratio of the secondary extract to the extract oil is 5-6: 1.
3. The process of claim 1, wherein the spent lubricating oil extract is regenerated by dissolution, and the process comprises the following steps: and the volume ratio of the distillate oil to the NMP in the step S1 and the step S2 is 1-1.5: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010698906.0A CN111849603B (en) | 2020-07-20 | 2020-07-20 | Waste lubricating oil extract solution dissolving and regenerating process |
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| CN202010698906.0A CN111849603B (en) | 2020-07-20 | 2020-07-20 | Waste lubricating oil extract solution dissolving and regenerating process |
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| CN111849603A true CN111849603A (en) | 2020-10-30 |
| CN111849603B CN111849603B (en) | 2022-04-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311583A (en) * | 1980-02-27 | 1982-01-19 | Texaco, Inc. | Solvent extraction process |
| CN1107174A (en) * | 1994-11-15 | 1995-08-23 | 荆门石油化工研究院 | Reusing method for extracted solution of lubricating oil solvent |
| CN102643668A (en) * | 2011-02-21 | 2012-08-22 | 中国石油化工股份有限公司 | A process for simultaneously producing two environment-friendly rubber filling oils |
| CN105754704A (en) * | 2016-03-18 | 2016-07-13 | 安徽国孚润滑油工业有限公司 | Method for increasing yield of base oil by adopting extracted solution for secondary extraction |
| CN205556593U (en) * | 2015-12-28 | 2016-09-07 | 昆明永润科技发展有限公司 | Tertiary extraction separator of spent lubricating oil |
-
2020
- 2020-07-20 CN CN202010698906.0A patent/CN111849603B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4311583A (en) * | 1980-02-27 | 1982-01-19 | Texaco, Inc. | Solvent extraction process |
| CN1107174A (en) * | 1994-11-15 | 1995-08-23 | 荆门石油化工研究院 | Reusing method for extracted solution of lubricating oil solvent |
| CN102643668A (en) * | 2011-02-21 | 2012-08-22 | 中国石油化工股份有限公司 | A process for simultaneously producing two environment-friendly rubber filling oils |
| CN205556593U (en) * | 2015-12-28 | 2016-09-07 | 昆明永润科技发展有限公司 | Tertiary extraction separator of spent lubricating oil |
| CN105754704A (en) * | 2016-03-18 | 2016-07-13 | 安徽国孚润滑油工业有限公司 | Method for increasing yield of base oil by adopting extracted solution for secondary extraction |
Non-Patent Citations (1)
| Title |
|---|
| 李余才: "废润滑油溶剂再生的研究", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》 * |
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