CN111925860A - Two-stage extraction regeneration process for distillate oil of waste lubricating oil - Google Patents
Two-stage extraction regeneration process for distillate oil of waste lubricating oil Download PDFInfo
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- CN111925860A CN111925860A CN202010700210.7A CN202010700210A CN111925860A CN 111925860 A CN111925860 A CN 111925860A CN 202010700210 A CN202010700210 A CN 202010700210A CN 111925860 A CN111925860 A CN 111925860A
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- Prior art keywords
- oil
- extraction
- extract
- distillate oil
- nmp solvent
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- 239000003921 oil Substances 0.000 title claims abstract description 47
- 238000000605 extraction Methods 0.000 title claims abstract description 46
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002699 waste material Substances 0.000 title claims abstract description 15
- 230000008929 regeneration Effects 0.000 title claims abstract description 13
- 238000011069 regeneration method Methods 0.000 title claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 35
- 239000002199 base oil Substances 0.000 claims abstract description 8
- 230000001172 regenerating effect Effects 0.000 claims abstract description 4
- 238000004821 distillation Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 abstract description 3
- 238000005292 vacuum distillation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 26
- 239000000654 additive Substances 0.000 description 2
- 238000007630 basic procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- 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 discloses a two-stage extraction regeneration process of distillate oil of waste lubricating oil, the distillate oil is obtained by vacuum distillation of the waste lubricating oil, and the process steps comprise: adding an extract into the distillate oil for extraction to obtain raffinate and an extract, wherein the extract is obtained by extracting the distillate oil with an NMP solvent; adding a regenerated NMP solvent into the raffinate for extraction, and then carrying out dealcoholization treatment to obtain the regenerated base oil, wherein the regenerated NMP solvent is obtained by recovering and regenerating the NMP solvent used in the process of extracting distillate oil from extract. The invention firstly carries out coarse extraction on distillate oil, then carries out fine extraction on raffinate obtained by the coarse extraction, and can directly obtain the product with the chroma less than 8 by a two-stage extraction mode#And the saturated oil content of the qualified base oil product is more than 80%, the residual extraction capacity of the extract liquid is utilized in the coarse extraction process, and the regenerated NMP solvent is utilized in the fine extraction process, so that the utilization of the residual value of the processed product is improved, the input amount of a new solvent is reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of waste lubricating oil treatment, in particular to a two-stage extraction regeneration process for distillate oil of waste lubricating oil.
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 using a polar solvent NMP (N-Methyl pyrrolidone) to obtain raffinate (90% of oil + 10% of NMP) and extract (90% of NMP + 10% of oil), wherein the raffinate is further treated to obtain an oil product, and the obtained extract still has certain extraction capacity because partial NMP does not participate in dissolution, so that the extract can be used for carrying out secondary extraction on the distillate oil, but process optimization is required to be carried out, and the obtained oil product reaches the standard in chromaticity and saturated oil content.
Disclosure of Invention
The invention aims to provide a two-stage extraction regeneration process for distillate oil of waste lubricating oil, which fully utilizes the residual extraction capacity of extract liquid and obtains a qualified oil product through two-stage extraction.
The invention realizes the purpose through the following technical scheme:
a two-stage extraction and regeneration process for the fraction oil of waste lubricating oil includes such steps as vacuum distillation of waste lubricating oil
Step one, coarse extraction:
adding an extract into distillate oil for extraction to obtain raffinate and an extract, wherein the extract is obtained by extracting the distillate oil with an NMP solvent;
step two, fine extraction:
adding a regenerated NMP solvent into raffinate for extraction, and then carrying out dealcoholization treatment to obtain regenerated base oil, wherein the regenerated NMP solvent is obtained by recovering and regenerating the NMP solvent used in the distillate oil extraction process.
The further improvement is that the mass ratio of the distillate oil to the extract is 1: 1.8-2.2.
The further improvement is that the mass ratio of the raffinate to the regenerated NMP solvent is 1: 1-1.5.
In a further improvement, the solvent removal treatment is the removal of NMP solvent by atmospheric distillation.
In a further improvement, the regenerated NMP solvent has a color of 1 to 2#。
The invention has the beneficial effects that: the invention firstly carries out the coarse of the distillate oilExtracting, fine extracting the raffinate obtained by the coarse extraction, and directly obtaining the product with the chroma less than 8 by a two-stage extraction mode#The saturated oil content of the qualified base oil product is more than 80%, the residual extraction capacity of the extract is utilized in the coarse extraction process, the regenerated NMP solvent is utilized in the fine extraction process, the utilization of the residual value of the processed product is improved, the maximum dissolving effect of the solvent is exerted, the input amount of a new solvent is reduced, and the production cost is effectively reduced.
Drawings
FIG. 1 is a schematic diagram of a two-stage extraction regeneration process of spent lube distillate oil.
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.
Example 1
As shown in figure 1, a two-stage extraction and regeneration process of distillate oil of waste lubricating oil, wherein the distillate oil is obtained by vacuum distillation of the waste lubricating oil, and the process comprises the following steps:
step one, coarse extraction:
adding extract into distillate oil for extraction, wherein the mass ratio of the distillate oil to the extract is 1:1.8, and extracting to obtain raffinate and extract, wherein the extract is obtained by extracting the distillate oil with an NMP solvent (the extract comprises 90% of NMP + 10% of oil, and a part of NMP is not dissolved, so that the extract still has certain dissolving and extracting capacity);
step two, fine extraction:
adding a raffinate with a color of 1-2#Extracting the regenerated NMP solvent, wherein the mass ratio of the raffinate to the regenerated NMP solvent is 1:1, and then carrying out dealcoholization treatment (removing the NMP solvent by atmospheric distillation in a dealcoholization tower) to obtain the regenerated base oil, wherein the regenerated NMP solvent is obtained by recovering and regenerating the used NMP solvent in the distillate oil extraction processAnd (4) obtaining the regenerated NMP (the extract obtained by the distillate oil extraction and the extract both contain the NMP solvent, separating the NMP solvent from the extract through distillation, and then carrying out condensation, dehydration, purification and other steps).
Example 2
The basic procedure is the same as in example 1, except that: the mass ratio of distillate oil to extract liquid is 1:2, and the mass ratio of raffinate to regenerated NMP solvent is 1: 1.2.
Example 3
The basic procedure is the same as in example 1, except that: the mass ratio of distillate oil to extract liquid is 1:2.2, and the mass ratio of raffinate to regenerated NMP solvent is 1: 1.5.
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 (5)
1. A two-stage extraction regeneration process for distillate oil of waste lubricating oil, wherein the distillate oil is obtained by carrying out reduced pressure distillation on the waste lubricating oil, and is characterized in that: the process comprises the following steps
Step one, coarse extraction:
adding an extract into distillate oil for extraction to obtain raffinate and an extract, wherein the extract is obtained by extracting the distillate oil with an NMP solvent;
step two, fine extraction:
adding a regenerated NMP solvent into raffinate for extraction, and then carrying out dealcoholization treatment to obtain regenerated base oil, wherein the regenerated NMP solvent is obtained by recovering and regenerating the NMP solvent used in the distillate oil extraction process.
2. The process of claim 1, wherein the two-stage extraction regeneration of distillate oil of spent lubricating oil comprises the steps of: the mass ratio of the distillate oil to the extract is 1: 1.8-2.2.
3. The process of claim 1, wherein the two-stage extraction regeneration of distillate oil of spent lubricating oil comprises the steps of: the mass ratio of the raffinate to the regenerated NMP solvent is 1: 1-1.5.
4. The process of claim 1, wherein the two-stage extraction regeneration of distillate oil of spent lubricating oil comprises the steps of: the solvent removal treatment is to remove the NMP solvent by atmospheric distillation.
5. The process of claim 1, wherein the two-stage extraction regeneration of distillate oil of spent lubricating oil comprises the steps of: the regenerated NMP solvent has a color of 1-2#。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700210.7A CN111925860A (en) | 2020-07-20 | 2020-07-20 | Two-stage extraction regeneration process for distillate oil of waste lubricating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010700210.7A CN111925860A (en) | 2020-07-20 | 2020-07-20 | Two-stage extraction regeneration process for distillate oil of waste lubricating oil |
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| Publication Number | Publication Date |
|---|---|
| CN111925860A true CN111925860A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010700210.7A Pending CN111925860A (en) | 2020-07-20 | 2020-07-20 | Two-stage extraction regeneration process for distillate oil of waste lubricating oil |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177657A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Coalescence-separation type saturated oil separation recovery device and method for base oil solvent extraction extract |
| CN114177654A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Fiber separation type decoloring device and method for base oil solvent extraction raffinate |
| CN114288710A (en) * | 2021-12-28 | 2022-04-08 | 安徽国孚凤凰科技有限公司 | Desensitizing device and method for NMP solvent after base oil extraction and refining |
| CN114350433A (en) * | 2021-12-23 | 2022-04-15 | 安徽国孚凤凰科技有限公司 | Solvent extraction method for base oil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3488283A (en) * | 1968-03-28 | 1970-01-06 | Mobil Oil Corp | Preparation of two different lube oil fractions by single solvent extraction |
| US4328092A (en) * | 1980-03-07 | 1982-05-04 | Texaco Inc. | Solvent extraction of hydrocarbon 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 |
| CN205759806U (en) * | 2016-07-05 | 2016-12-07 | 苏州双湖化工技术有限公司 | A kind of solvent extraction refining plant of added solvent side reflux |
| CN106833736A (en) * | 2017-03-29 | 2017-06-13 | 山东铂铠环保科技有限公司 | A kind of method of waste oil regeneration base oil |
-
2020
- 2020-07-20 CN CN202010700210.7A patent/CN111925860A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3488283A (en) * | 1968-03-28 | 1970-01-06 | Mobil Oil Corp | Preparation of two different lube oil fractions by single solvent extraction |
| US4328092A (en) * | 1980-03-07 | 1982-05-04 | Texaco Inc. | Solvent extraction of hydrocarbon 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 |
| CN205759806U (en) * | 2016-07-05 | 2016-12-07 | 苏州双湖化工技术有限公司 | A kind of solvent extraction refining plant of added solvent side reflux |
| CN106833736A (en) * | 2017-03-29 | 2017-06-13 | 山东铂铠环保科技有限公司 | A kind of method of waste oil regeneration base oil |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114177657A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Coalescence-separation type saturated oil separation recovery device and method for base oil solvent extraction extract |
| CN114177654A (en) * | 2021-12-23 | 2022-03-15 | 安徽国孚凤凰科技有限公司 | Fiber separation type decoloring device and method for base oil solvent extraction raffinate |
| CN114350433A (en) * | 2021-12-23 | 2022-04-15 | 安徽国孚凤凰科技有限公司 | Solvent extraction method for base oil |
| CN114177657B (en) * | 2021-12-23 | 2023-03-10 | 安徽国孚凤凰科技有限公司 | Coalescence-separation type saturated oil separation recovery device and method for base oil solvent extraction extract |
| CN114288710A (en) * | 2021-12-28 | 2022-04-08 | 安徽国孚凤凰科技有限公司 | Desensitizing device and method for NMP solvent after base oil extraction and refining |
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Application publication date: 20201113 |