CN106518788A - Wax crystal used for high viscous oil as well as asphaltene dispersant - Google Patents
Wax crystal used for high viscous oil as well as asphaltene dispersant Download PDFInfo
- Publication number
- CN106518788A CN106518788A CN201610861022.6A CN201610861022A CN106518788A CN 106518788 A CN106518788 A CN 106518788A CN 201610861022 A CN201610861022 A CN 201610861022A CN 106518788 A CN106518788 A CN 106518788A
- Authority
- CN
- China
- Prior art keywords
- pour
- dispersant
- wax
- crude
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/70—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings condensed with carbocyclic rings or ring systems
- C07D239/72—Quinazolines; Hydrogenated quinazolines
- C07D239/86—Quinazolines; Hydrogenated quinazolines with hetero atoms directly attached in position 4
- C07D239/88—Oxygen atoms
- C07D239/90—Oxygen atoms with acyclic radicals attached in position 2 or 3
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
Abstract
The invention discloses a wax crystal used for high viscous oil as well as an asphaltene dispersant. The dispersant is an organic compound containing oil-soluble long-carbon chain fatty alkyl function group and polar ester group, amido group, phenyl and amido function groups. The dispersant has the advantages of wide raw materials source, simple synthesis technology, cleaning and no pollution during processes, easy acquisition, and transport and preservation of the product. The dispersant has good salt-resistant performance, the mineralization-resistant degree can reach 220000 mg/L; The dispersant enables complex formulation with a plurality of pour-point depressants for usage, the effect is obvious, under condition that the dispersant enables complex formulation with a pour-point depressant, the usage amount is 150 ppm, compared with the crude oil with the pour-point depressant, the crude oil with high solidification point can be reduced with more 3 DEG C, and compared with a single pour-point depressant, the viscosity is reduced by more than 55%. The wax crystal can be widely used for pour depressing and viscosity reducing on-site tests of the high viscous oil well.
Description
Technical field
The present invention relates to what is used during a kind of thickened oil recovery can help to wax crystalline substance, the scattered small molecule chemical combination of Colophonium
Thing, and in particular to a kind of wax for High viscosity crude is brilliant, asphaltene dispersants.
Background technology
Viscous crude resource reserve occupies larger proportion in World's Oil and Gas Resources gross reserves.With to petroleum resources exploitation skill
The continuous improvement of art, and the continuous exhaustion of light crude oil resource, High viscosity crude resource increasingly cause the height of oil worker
Degree is paid attention to.Therefore how exploitation utilization is carried out to High viscosity crude, makes and can employ energy reserve, become oil circle always
In the difficult problem probed into.The low temperature flowability for adding a small amount of pour-point depressant in crude oil to improve viscous crude is the row for generally adopting at present
Effective method.But as in-place oil composition is complicated, many oil reservoirs face high salt, high-content wax, high asphalitine etc. and ask
Topic, therefore, only adding pour-point depressant has limitation to the depression effeCt of High viscosity crude, and the use of emulsifying pour depressor will face the later stage
The predicaments such as breakdown of emulsion.
Wax-crystal dispersing auxiliary is the low molecular compound that a class has oil-soluble alkane side chain and more highly polar group concurrently.Mesh
It is front mainly with pour-point depressant compounding use, be applied to reduce cold filter point of diesel oil, show good cooperative effect.Pour-point depressant acts on machine
Reason also imperfectly understands, and general theory thinks, some pour-point depressants adopt adsorption mechanism, has some then using eutectic mechanism, wax
Brilliant dispersant be exactly with adsorption theory be according to synthesis a class pour-point depressant.
BASF European Co., Ltd disclosed invention ZL 200780023172.9 " as the stone of fuel in China in 2007
The polar oil-soluble nitrogen compound of dispersing agent for wax and the mixture of amide ", the invention is related to a kind of dispersant, by polar oil-soluble
The oil-soluble products composition that nitrogen compound, oil-soluble amide and carboxylic acid and alkylamine are formed, it is adaptable to containing biodiesel
Fuel oil.But it is poor for the viscous crude action effect containing colloid, asphalitine；Additionally, the dispersant has more carboxylic acid
Group, it is easy to form hydrogen bond, the formation condition not being suitable for more than water containing stratum.
Asphaltene dispersants are that one kind can be by asphalitine stable in crude oil so as to wadding does not occur in poised state
Chemical agent that is solidifying and depositing.In order to increase the stability of asphalitine, polar compound such as alcohols, amine, ketone etc. can be added.
There is the absorption in asphalitine by surfactant molecule, play a part of peptized asphaltenes, i.e., by adding parents' molecule
Improve the colloidal stability of crude oil, prevent the flocculation of asphalitine from depositing.
ZL 02155597.4 " oil well cleaning de-plugging agent " proposes a kind of oil development oil well that is used for and cleans de-plugging agent,
Aromatic hydrocarbons, ethanol, acylate, Emulsification of Paraffin dispersant, Efficient detergent are combined by a certain percentage, colloid, Colophonium is can dissolve
The Organic substances such as matter, waxiness, strengthen crude oil fluidity, may also suppress reservoir clay swell.Its main component is aromatic hydrocarbon substance, its
In detergent composition be still fluorinated surfactant.The consumption patent of cleaning de-plugging agent has no and is related to, and economy is difficult to do
Assessment.
" new heterocyclic compound containing N is used as the multiple-effect performance of lube oil additive " (Logistics engineering that Ouyang's equality is delivered
Institute's journal), 2008,04 " provide in document it is a kind of for multiple-effect performances such as temperature resistance, wear-resistant, antioxygen and anti-corruption in lubricating oil
Heterocyclic compound containing N.But the document does not report this compound in crude oil for wax is brilliant and colloid, the dispersion of asphalitine
Effect.It is according to experimentation, this that there is aromatic heterocycle polar functional group and the non-pole of Long carbon chain alkyl with heterocyclic compound containing N
Property functional group, can be used for that viscous crude wax is brilliant, asphaltene dispersants.Above-mentioned heterocyclic compound containing N is used for High viscosity crude wax crystalline substance, Colophonium
Dispersant simultaneously has no any document or patent report.
The content of the invention
The present invention provides for exist not enough of above-mentioned prior art that a kind of wax for High viscosity crude is brilliant, asphalitine point
Powder, the dispersant be a kind of ester group containing oil-soluble Long carbon chain fatty alkyl functional group and polarity, amide groups, phenyl with
And the organic compound of amidine functional group.The characteristics of dispersant has heatproof, salt tolerance, pour point depression and viscosity-reducing performance good.It is above-mentioned
The wax for High viscosity crude is brilliant, asphaltene dispersants, its molecular formula is as follows：
In formula, n is 12～18 even number, preferably 14.
Heterocyclic compound containing N of the invention has ester group, amide groups and the amidine functional group of nonpolar hydrocarbon chain and polarity,
Oil-soluble hydrocarbon chain can be adsorbed with the hydrocarbon backbone eutectic of wax, and polar functional group is due to stronger dispersion and solubilising
Ability, contributes to the habit that pour-point depressant changes wax in crude oil, it is ensured that pour-point depressant can play the action effect of maximum；Separately
Outward, this contains N heterocyclic compounds with adjacent benzene heterocycle functional group, and the group is easy to be combined with the asphalitine in High viscosity crude, penetrates into
To between the lamellar molecule of asphalitine, after being combined with the compound, asphaltene molecules are difficult to be bound to each other to form big crystal, rise
To the effect of dispersed bitumens matter, it is eventually exhibited as reducing the viscosity of viscous crude.
The present invention is had the advantage that and beneficial effect compared with prior art：
(1) wax of the invention is brilliant, asphaltene dispersants raw material sources extensively, synthesis technique is simple, and process cleans are without dirt
Dye, product are easily obtained and transport preservation；
(2) wax of the invention is brilliant, asphaltene dispersants have consumption few, the characteristics of safety and stability, remarkable in economical benefits；
(3) wax of the invention crystalline substance, asphaltene dispersants temperature resistance salt resistant character are good, and up to 220 DEG C, resistance to salinity reaches heatproof
220000mg/L；
(4) wax of the invention crystalline substance, asphaltene dispersants universality are good, not only have good Synergistic to make with pour-point depressant
With, and also there is preferable peptizaiton to asphalitine.Under the conditions of compounding, when consumption is 150ppm, high solidification can be made
The crude oil selected compare only add pour-point depressant more reduce by more than 3 DEG C, viscosity is compared single pour-point depressant and reduces more than 55%.
Specific embodiment
With reference to specific embodiment, and the present invention is described in further detail with reference to data, it should be appreciated that these embodiments
It is of the invention solely for the purpose of illustration, rather than the scope of the present invention is limited by any way.
Embodiment 1：
The invention provides a kind of wax for High viscosity crude is brilliant, asphaltene dispersants P1, its molecular formula is：
According to existing document, above-mentioned High viscosity crude wax is brilliant, asphaltene dispersants P1Specifically to prepare equation as follows：
Using the High viscosity crude wax crystalline substance of said method preparation, asphaltene dispersants P1With commercially available T1804 pour-point depressants according to not
Compound in proportion, be added in Shengli Oil Field High viscosity crude M with 150ppm additions, stirred.The basic parameter of the viscous crude
It is as follows：Freezing point is 32.8% in 43 DEG C, paraffin content, and viscosity is (43 DEG C) 7250mPa.s, density is 948.6kg/m3, it is aqueous
Rate is 28.38%.
Which is determined according to SY/T 0541-2009 methods reduces high-content wax viscous crude M condensation points, viscosity effect, and test result is shown in Table
1。
1 P of table1With the pour point depression before and after pour-point depressant compounding, viscosity reducing effect
Data shown in reference table 1 understand, for Shengli Oil Field High viscosity crude M, the wax crystalline substance of High viscosity crude of the present invention, asphalitine
Dispersant P1After with commercially available T1804 pour-point depressants compounding condensation point can be made to reduce by 7～8 DEG C, than only adding commercially available T1804 pour point depressions
More than 3 DEG C being reduced agent, in addition, comparing the viscosity reducing effect of single pour-point depressant, the pour-point depressant after compounding reduces can its viscosity more
More than 58%, illustrate that the wax for High viscosity crude of the present invention is brilliant, asphaltene dispersants P1Not only there is good Synergistic
Effect, and there is wax crystalline substance, asphalitine peptizaiton.
Embodiment 2：
The invention provides a kind of wax for High viscosity crude is brilliant, asphaltene dispersants P2, its molecular formula is：
According to existing document, above-mentioned High viscosity crude wax is brilliant, asphaltene dispersants P2Concrete preparation method it is as follows：
Using the High viscosity crude wax crystalline substance of said method preparation, asphaltene dispersants P2It is multiple according to different proportion with commercially available T1804 pour-point depressants
Match somebody with somebody, be added in Shengli Oil Field High viscosity crude M with 150ppm additions, stirred.The basic parameter of the viscous crude is as follows：Solidification
O'clock 43 DEG C, paraffin content be 32.8%, viscosity be (43 DEG C) 7250mPa s, density be 948.6kg/m3, moisture content be
28.38%.
Which is determined according to SY/T 0541-2009 methods reduces High viscosity crude M condensation points, viscosity effect, and test result is shown in Table 2.
2 P of table2With the pour point depression before and after pour-point depressant compounding, viscosity reducing effect
Data shown in reference table 2 understand, for Shengli Oil Field High viscosity crude M, the wax crystalline substance of High viscosity crude of the present invention, asphalitine
Dispersant P2After with commercially available T1804 pour-point depressants compounding condensation point can be made to reduce by 9～10 DEG C, than only adding commercially available T1804 drops
More than 5 DEG C being reduced solidifying agent, in addition, comparing the viscosity reducing effect of single pour-point depressant, the pour-point depressant after compounding reduces can its viscosity more
More than 56%, illustrate that the High viscosity crude wax of the present invention is brilliant, asphaltene dispersants P2Not only there is good synergistic function, and
And there is wax crystalline substance, asphalitine peptizaiton.
Embodiment 3：
The invention provides a kind of wax for High viscosity crude is brilliant, asphaltene dispersants P3, its molecular formula is：
According to existing document, the wax crystalline substance of above-mentioned High viscosity crude, asphaltene dispersants P3Concrete preparation method it is as follows：
Using the High viscosity crude wax crystalline substance of said method preparation, asphaltene dispersants P3With commercially available T1804 pour-point depressants according to not
Compound in proportion, be added in Shengli Oil Field High viscosity crude M with 150ppm additions, stirred.The basic parameter of the viscous crude
It is as follows：Freezing point is 32.8% in 43 DEG C, paraffin content, and viscosity is (43 DEG C) 7250mPa.s, density is 948.6kg/m3, it is aqueous
Rate is 28.38%.
Which is determined according to SY/T 0541-2009 methods reduces High viscosity crude M condensation points, viscosity effect, and test result is shown in Table 3.
3 P of table3With the pour point depression before and after pour-point depressant compounding, viscosity reducing effect
Data shown in reference table 3 understand, for Shengli Oil Field High viscosity crude M, the High viscosity crude wax crystalline substance of the present invention, asphalitine
Dispersant P3After with commercially available T1804 pour-point depressants compounding condensation point can be made to reduce by 8～10 DEG C, than only adding commercially available T1804 drops
More than 4 DEG C being reduced solidifying agent, in addition, comparing the viscosity reducing effect of single pour-point depressant, the pour-point depressant after compounding reduces can its viscosity more
More than 64%, illustrate that the High viscosity crude wax of the present invention is brilliant, asphaltene dispersants P3Not only there is good synergistic function, and
And there is wax crystalline substance, asphalitine peptizaiton.
Embodiment 4：
The invention provides a kind of wax for High viscosity crude is brilliant, asphaltene dispersants P4, its molecular formula is：
According to existing document, the wax crystalline substance of above-mentioned High viscosity crude, asphaltene dispersants P4Concrete preparation method it is as follows：
The wax of the High viscosity crude prepared using said method is brilliant, asphaltene dispersants P4With commercially available T1804 pour-point depressants according to
Different proportion is compounded, and is added in Shengli Oil Field High viscosity crude M with 150ppm additions, is stirred.The basic ginseng of the viscous crude
Number is as follows：Freezing point is 32.8% in 43 DEG C, paraffin content, and viscosity is (43 DEG C) 7250mPa s, density is 948.6kg/m3, contain
Water rate is 28.38%.
Which is determined according to SY/T 0541-2009 methods reduces High viscosity crude M condensation points, viscosity effect, and test result is shown in Table 4.
4 P of table4With the pour point depression before and after pour-point depressant compounding, viscosity reducing effect
Data shown in reference table 4 understand, for Shengli Oil Field High viscosity crude M, the High viscosity crude wax crystalline substance of the present invention, asphalitine
Dispersant P4After with commercially available T1804 pour-point depressants compounding condensation point can be made to reduce by 7～8 DEG C, than only adding commercially available T1804 pour point depressions
More than 3 DEG C being reduced agent, in addition, comparing the viscosity reducing effect of single pour-point depressant, the pour-point depressant after compounding reduces can its viscosity more
More than 57%, illustrate that the High viscosity crude wax of the present invention is brilliant, asphaltene dispersants P4With wax crystalline substance, asphalitine peptizaiton.
In sum, heterocyclic compound containing N of the invention is used for High viscosity crude wax crystalline substance, asphaltene dispersants not only with preferable
Wax crystalline substance peptizaiton, significantly reduce the freezing point of High viscosity crude；And the effect with dispersed bitumens matter, effectively reduce
The viscosity of High viscosity crude.Consumption of the present invention is few simultaneously, and synthesis technique is simple, and process cleans are pollution-free, are suitable for High viscosity crude
Exploitation and delivery application.
Claims (2)
1. a kind of wax for High viscosity crude is brilliant, asphaltene dispersants, it is characterised in that described dispersant is a kind of containing oil
The Long carbon chain fatty alkyl functional group of dissolubility and the organic compound of the ester group of polarity, amide groups, phenyl and amidine functional group,
Its molecular formula is as follows：
In formula, n is 12～18 even number.
2. a kind of wax for High viscosity crude according to claim 1 is brilliant, asphaltene dispersants, it is characterised in that described
N be 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861022.6A CN106518788B (en) | 2016-09-28 | 2016-09-28 | Wax crystalline substance, asphaltene dispersants for High viscosity crude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861022.6A CN106518788B (en) | 2016-09-28 | 2016-09-28 | Wax crystalline substance, asphaltene dispersants for High viscosity crude |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106518788A true CN106518788A (en) | 2017-03-22 |
| CN106518788B CN106518788B (en) | 2019-04-02 |
Family
ID=58344667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610861022.6A Active CN106518788B (en) | 2016-09-28 | 2016-09-28 | Wax crystalline substance, asphaltene dispersants for High viscosity crude |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106518788B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835523A (en) * | 2018-08-17 | 2020-02-25 | 中国石油化工股份有限公司 | Emulsifying viscosity reducer for cold production of thick oil and preparation method thereof |
| CN116589996A (en) * | 2023-05-09 | 2023-08-15 | 华美孚泰油气增产技术服务有限责任公司 | Liposome high-coagulation thick oil displacement agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473018A (en) * | 2006-06-22 | 2009-07-01 | 巴斯夫欧洲公司 | Mixture from polar oil-soluble nitrogen compounds and acid amides as paraffin dispersant for fuels |
| CN102191028A (en) * | 2010-03-18 | 2011-09-21 | 中国石油化工股份有限公司 | Oil-soluble viscosity breaker composition |
-
2016
- 2016-09-28 CN CN201610861022.6A patent/CN106518788B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101473018A (en) * | 2006-06-22 | 2009-07-01 | 巴斯夫欧洲公司 | Mixture from polar oil-soluble nitrogen compounds and acid amides as paraffin dispersant for fuels |
| CN102191028A (en) * | 2010-03-18 | 2011-09-21 | 中国石油化工股份有限公司 | Oil-soluble viscosity breaker composition |
Non-Patent Citations (4)
| Title |
|---|
| 向晶，等: "稠油沥青分散剂的筛选及效果研究", 《精细石油化工进展》 * |
| 宋军，等: "新型油溶性沥青质分散剂抑制重质原油沥青质沉积的研究", 《石油炼制与化工》 * |
| 欧阳平，等: "新型含N杂环化合物用作润滑油添加剂的多效性能", 《后勤工程学院学报》 * |
| 欧阳平，等: "无硫磷喹唑啉酮酯新型润滑油抗磨添加剂的制备及其性能", 《石油学报(石油加工)》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835523A (en) * | 2018-08-17 | 2020-02-25 | 中国石油化工股份有限公司 | Emulsifying viscosity reducer for cold production of thick oil and preparation method thereof |
| CN110835523B (en) * | 2018-08-17 | 2022-02-15 | 中国石油化工股份有限公司 | Emulsifying viscosity reducer for cold production of thick oil and preparation method thereof |
| CN116589996A (en) * | 2023-05-09 | 2023-08-15 | 华美孚泰油气增产技术服务有限责任公司 | Liposome high-coagulation thick oil displacement agent and preparation method thereof |
| CN116589996B (en) * | 2023-05-09 | 2024-01-12 | 华美孚泰油气增产技术服务有限责任公司 | Liposome high-coagulation thick oil displacement agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106518788B (en) | 2019-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dehaghani et al. | An experimental study of diesel fuel cloud and pour point reduction using different additives | |
| RU2008140070A (en) | METHOD FOR PREPARING NANOEMULSION WATER IN OIL AND OIL IN WATER | |
| CN103554927B (en) | A kind of composite type pitch warm mix viscosity-depression agent and preparation method thereof | |
| CN103265816A (en) | Low-softening-point emulsified asphalt for drilling fluid and preparation method thereof | |
| US20090049737A1 (en) | Novel Single Phase Hydrous Hydrocarbon-Based Fuel, Methods for Producing the Same and Compositions for Use in Such Method | |
| CN106518788B (en) | Wax crystalline substance, asphaltene dispersants for High viscosity crude | |
| JP2004244532A (en) | Gasoline | |
| CN106833578A (en) | Daiamid Arrcostab is used for the pitch dispersant of High viscosity crude | |
| CN102022619B (en) | Functional compound inhibitor and method of inhibiting hydrate accumulation and paraffin deposition | |
| BR112014022491B1 (en) | use of a viscosity-improving additive | |
| CN101735788B (en) | Pour point depressant for crude oil | |
| US20190071612A1 (en) | Sheer stable, friction reduction in hydrocarbon liquids | |
| CN108521781A (en) | Fuel oil " A " composition | |
| BRPI0709261A2 (en) | fuel additive concentrate, fuel additive, fuel treatment process, fuel composition, and methods for improving the operation of a gasoline-powered, artificial-ignition internal combustion engine, a diesel-powered combustion engine, a coal-fired boiler or power plant, jet engine and boiler | |
| CN100457874C (en) | Vanadium suppress agent in use for heavy oil type gas turbine, and preparation method | |
| NO20211358A1 (en) | Environmentally friendly flow improvers with improved formulation stability at low temperatures | |
| JP6174962B2 (en) | Diesel fuel oil composition | |
| CN102604621B (en) | Novel high-efficiency composite viscosity reducer for super heavy oil | |
| JP5896815B2 (en) | A heavy oil composition | |
| CN108048143A (en) | A kind of nano fuel energy-saving clean agent | |
| CN102358854A (en) | Environmental protection type diesel fuel emulsifier | |
| CN106866640B (en) | For High viscosity crude asphaltene dispersants | |
| Peng et al. | Preparation of poly-Hydrazide and use as pour point depressor for heavy oil | |
| CN109777540A (en) | A kind of energy-saving fuel purificant and preparation method thereof | |
| DE298309C (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |