CN1251382A - Improvement of electric refining method for lubricant base-oil denitrification process - Google Patents
Improvement of electric refining method for lubricant base-oil denitrification process Download PDFInfo
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- CN1251382A CN1251382A CN 99122370 CN99122370A CN1251382A CN 1251382 A CN1251382 A CN 1251382A CN 99122370 CN99122370 CN 99122370 CN 99122370 A CN99122370 A CN 99122370A CN 1251382 A CN1251382 A CN 1251382A
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Abstract
The present invention relates to an improvement on electrostatic settler system in denitrogenation process of raw lubricating oil, which is characterized by adding an adjustable voltage device in electric system to implement quick and effective separation of residue produced after denitrogenation of various lubricating oils and make it more favorable for preparing basic oil of lubricating oil with good oxidation stability.
Description
The invention belongs to the refining of petroleum field, refer more particularly to the improvement of the good lube base oil making technology of oxidation stability, its international Patent classificating number is CIOM101/0.
As everyone knows, the oxidation stability of oil product directly influences the work-ing life or the high-temperature behavior of oil product, and oxidation security and its chemical constitution of base oil have close getting in touch.Studies show that: the existence of the sulfide in the base oil has certain restraining effect to oxidation, and nitride plays a driving role to oxidation, especially basic nitrogen compound, its promoter action is stronger, and traditional clay-filtered technology is carclazyte consumption height not only, poor selectivity, yield is low, operational condition is poor, and environmental issue is outstanding, and nitride can only remove 40～50%; Hydrofining technology dealkalize nitrogen rate is very low or take off hardly, and the decreasing ratio of sulphur is then very high, and the high-pressure hydrogenation process investment is big, cost is high, adopts the producer of this technology very few.That has invented a kind ofly is used for the high sulfur-preserving and denitrifying agent of lubricant base selectivity and provides favourable condition for preparation oxidation stability good lubricant base, and it is invented referring to Chinese patent (ZL94115190.5).The sedimenting system employing of prior art fixedly intermittent type electric field is separated to quicken two, as Chinese patent CN1177626A.Usually adopting voltage of electric field 20000V～30000V or strength of electric field is 2000V/cm～3000V/cm, and existing installation generally all is fixed on the voltage gear, want to change to another voltage gear as when 26000V changes to 20000V, must stop all electrofining systems.In addition, common way is as long as electric field system allows, and generally all electric field is transferred on the high voltage.Adopt existing denitride technology, when under high current field condition, processing lighter body, the denitrogenation separating effect is better, and during processing heavy oil, the denitrogenation separating effect is not ideal enough, when processing the dissimilar lubricant base of weight simultaneously, select different strength of electric field such as high, medium and low grade for use, help two and be separated; Processing during lighter body electric field can height can be low, in order to quicken to separate, generally select the higher electric field good separating effect for use; The heavy base oil is selected for use the separating effect of low its denitrification effect of electric field all to be better than and is selected higher electric field for use in the processing.
The objective of the invention is in order to improve the oxidation security of lubricant base, the measure of taking is that electric refining method in the lubricating oil denitrogenation commercial run is improved.Adopt sulfur-preserving and denitrifying agent or other denitrfying agent that ZL94115190.5 provided, the improved electric sedimenting system of denitrification process technology of utilization patent 97116286.7 is guaranteed from lightweight to reach the quality that improves lubricant base to residue base oil basic nitrogen removal rate.
Content of the present invention is achieved in that the residual oil with straight-run gas oil or process propane deasphalting is that lubricant base is through furfural treatment or phenol treating, dewaxing, the course of processing such as refining with adsorbents or repeated hydrogenation is also produced the method for bright stock base oil in conjunction with denitrification process utilization electricity sedimenting system, be that a kind of regulator is installed in the electric sedimenting system of lubricating oil denitrification process device, its range of regulation is between 0～1000V, this regulator can be installed in before the high-tension transformer, perhaps be directly installed on high-tension transformer elementary, regulator is continuously adjustable or adjustable gaps in operation, voltage of electric field in the electric slurry tank is changed between 0～30000V continuously, strength of electric field is between 0～3000V/cm, and strength of electric field has comprised low electric field, middle electric field and high electric field.Adopt different purification conditions according to different in kind in the lubricating oil distillate, reach needed basic nitrogen removal rate and prepare the good lubricant base of oxidation stability.
1. with straight-run gas oil as lubricant base oil fraction, through dewaxing, after the furfural treatment or through above-mentioned refining after again mild hydrogenation oil in static mixer, mixed in 1: 50～1: 500 with the ratio (abbreviation agent-oil ratio) of oil with denitrfying agent with denitrfying agent through heat exchange to 25 ℃～180 ℃, enter electric slurry tank then, between strength of electric field 0～3000V/cm, settlement separate, the denitrogenation slag is discharged from the slurry tank bottom, and denitrogenation oil flows out from electric slurry tank top, handles through clay-filtered or mild hydrogenation or other and just prepares the good lubricant base of oxidation stability.
2. with residual oil as lubricant base oil fraction through propane deasphalting, oil after furfural treatment or the phenol treating after heat exchange to 50 ℃～180 ℃ with denitrfying agent thorough mixing in static mixer, enter electric slurry tank then, in strength of electric field is between 0～2000V/cm, settlement separate, the denitrogenation slag is discharged from slurry tank bottom, and denitrogenation oil flows out from electrofining slurry tank top, handles just making the good lubricant base of oxidation stability again through clay-filtered or mild hydrogenation or other.
3. with residual oil as lubricant base oil fraction through propane deasphalting, furfural treatment or phenol treating, oil after the dewaxing, or by above refining after again behind the mild hydrogenation oil after heat exchange to 50 ℃～180 ℃ with denitrfying agent thorough mixing in static mixer, enter electric slurry tank then, in strength of electric field is between 0～2000V/cm, guarantee under electric current＜50mA condition settlement separate, the denitrogenation slag is discharged from the slurry tank bottom, and denitrogenation oil flows out from electrofining slurry tank top, handles just making the good lubricant base of oxidation stability again through clay-filtered or mild hydrogenation or other.
For then in said process, reducing dewaxing process with crude oil of low-coagulation production denitrogenation lubricant base.
The effect that the present invention reached is to adopt this technology lubricant base basic nitrogen obviously to reduce, and oxidation stability significantly improves, and its alkali nitrogen can take off to 10～100PPm by 100～800PPm.For example Nanyang intermediate base third fractional oil rotary oxygen bomb value was brought up to about 250 minutes by 130 minutes, and grand celebration paraffin base oil 500SN can do from 110 minutes and bring up to more than 200 minutes.
Embodiment 1 grand celebration paraffin base oil is through furfural treatment, and dewaxing back refining effect under same electric field not sees Table-1:
Table-1
| Induction field V | ?1000 | ?500 | ?330 | ??180 | ??80 | ??0 |
| Electric field V | ?30000 | ?15000 | ?10000 | ??5000 | ??2000 | ??0 |
| Electric-force gradient V/cm | ?3000 | ?1500 | ?1000 | ??500 | ??200 | ??0 |
| Alkali nitrogen PPm | ?190 | ?140 | ?120 | ??61 | ??65 | ??210 |
Other processing condition: raw material alkali nitrogen 278PPm, agent-oil ratio 1: 230,85 ℃ of denitrification temperature, carclazyte consumption 1%, 200 ℃ of carclazyte temperature.
Embodiment 2
Nanyang intermediate base lubricating oil moves 2 years through 50,000 tons of/year industrial nitrogen rejection facilitys of processes such as furfural treatment, dewaxing, denitrogenation, clay finishing design, and random inspection the results are shown in Table-2:
Table-2
| Subtract three-way raw material | The denitrification refining base oil | |
| Alkali nitrogen PPm | ?232 | ????12.5 |
| Sulphur content PPm | ?1815 | ????1729 |
| Look number | ?2.5 | ????1.5 |
| Rotary oxygen bomb (minute) | ?111 | ????270 |
This result's processing condition are: 80 ℃ of denitrification reaction temperature, agent-oil ratio 1: 150, carclazyte consumption 1%, strength of electric field 2000V/cm.
Embodiment 3
Grand celebration paraffinic base straight-run gas oil sees Table-3 through dewaxing, phenol treating, denitrogenation, clay finishing in the denitrogenation data of different agent-oil ratios:
Table-3
| Induction field V | ??1000 | ??800 | ??500 | ??100 | ??50 | ??0 |
| Strength of electric field V/cm | ??3000 | ??2400 | ??1500 | ??300 | ??150 | ??0 |
| Alkali nitrogen content PPm | ??270 | ??195 | ??110 | ??65 | ??11 | ??200 |
| Rotary oxygen bomb (minute) | ??110 | ??110 | ??125 | ??165 | ??218 | ??130 |
Its processing condition are: 80 ℃ of denitrification temperature, carclazyte consumption 1%, agent-oil ratio 1: 200.
Embodiment 4
Grand celebration paraffinic base residual oil is through industrial treatment such as propane deasphalting, dewaxing, furfural treatment, denitrogenation, clay finishings, agent-oil ratio 1: 75, carclazyte consumption 2%, induction field 80V, strength of electric field 200V/cm, alkali nitrogen is from the 536PPm 150PPm that descends, oxygen bomb value 168 minutes.
Embodiment 5
The Nanyang intermediate base subtracts third fractional oil through processes such as furfural treatment, dewaxing, denitrogenation, hydrogenation, under 1: 150 condition of 70 ℃ of agent-oil ratios, and induction field 120V, strength of electric field 500V/cm, alkali nitrogen drops to 22PPm from 260PPm.
Claims (1)
1, a kind of residual oil with straight-run gas oil or process propane deasphalting is that lubricant base is through furfural treatment or phenol treating, dewaxing, the course of processing such as refining with adsorbents or repeated hydrogenation is also produced the method for bright stock base oil in conjunction with denitrification process utilization electricity sedimenting system, it is characterized in that in the electric sedimenting system of lubricating oil denitrification process device, installing a kind of regulator, its range of regulation is between 0～1000V, this regulator is installed in before the high-tension transformer, perhaps be directly installed on high-tension transformer elementary, regulator is continuously adjustable or adjustable gaps in operation, voltage of electric field in the electric slurry tank is changed between 0～30000V continuously, strength of electric field is between 0～3000V/cm, strength of electric field has comprised low electric field, middle electric field and high electric field, adopt different purification conditions according to different in kind in the lubricating oil distillate, prepare the good lubricant base of oxidation stability and reach needed basic nitrogen removal rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122370 CN1118541C (en) | 1999-11-04 | 1999-11-04 | Improvement of electric refining method for lubricant base-oil denitrification process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122370 CN1118541C (en) | 1999-11-04 | 1999-11-04 | Improvement of electric refining method for lubricant base-oil denitrification process |
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| Publication Number | Publication Date |
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| CN1251382A true CN1251382A (en) | 2000-04-26 |
| CN1118541C CN1118541C (en) | 2003-08-20 |
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| CN 99122370 Expired - Fee Related CN1118541C (en) | 1999-11-04 | 1999-11-04 | Improvement of electric refining method for lubricant base-oil denitrification process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331993C (en) * | 2004-07-06 | 2007-08-15 | 中国石油化工股份有限公司 | Pretreatment method of lubricating oil hydrogenation isomeric dewax raw material |
| CN101386791B (en) * | 2008-11-04 | 2012-03-21 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN101386794B (en) * | 2008-11-05 | 2012-05-30 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN102485842A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气股份有限公司 | Method for processing fixed bed fishing coker gas oil |
| CN102485845A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气股份有限公司 | Denitrogenation hydrogenation method for secondary processing diesel oil |
| CN101386792B (en) * | 2008-11-04 | 2013-01-02 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN114989862A (en) * | 2022-05-25 | 2022-09-02 | 涿州贝尔森生化科技发展有限公司 | Vacuum degassing and mixed reaction and electrification refining separation series denitrification process method |
-
1999
- 1999-11-04 CN CN 99122370 patent/CN1118541C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331993C (en) * | 2004-07-06 | 2007-08-15 | 中国石油化工股份有限公司 | Pretreatment method of lubricating oil hydrogenation isomeric dewax raw material |
| CN101386791B (en) * | 2008-11-04 | 2012-03-21 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN101386792B (en) * | 2008-11-04 | 2013-01-02 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN101386794B (en) * | 2008-11-05 | 2012-05-30 | 中国海洋石油总公司 | Transformer oil base oil and preparation method and applications thereof |
| CN102485842A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气股份有限公司 | Method for processing fixed bed fishing coker gas oil |
| CN102485845A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气股份有限公司 | Denitrogenation hydrogenation method for secondary processing diesel oil |
| CN102485842B (en) * | 2010-12-03 | 2014-01-15 | 中国石油天然气股份有限公司 | Method for processing fixed bed fishing coker gas oil |
| CN102485845B (en) * | 2010-12-03 | 2014-01-15 | 中国石油天然气股份有限公司 | Denitrogenation hydrogenation method for secondary processing diesel oil |
| CN114989862A (en) * | 2022-05-25 | 2022-09-02 | 涿州贝尔森生化科技发展有限公司 | Vacuum degassing and mixed reaction and electrification refining separation series denitrification process method |
| CN114989862B (en) * | 2022-05-25 | 2024-01-19 | 涿州贝尔森生化科技发展有限公司 | Serial denitrification process for vacuum degassing and mixing reaction powered refining separation |
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| Publication number | Publication date |
|---|---|
| CN1118541C (en) | 2003-08-20 |
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