CN1074037C - Pour point reducer for high pour point crude oil - Google Patents
Pour point reducer for high pour point crude oil Download PDFInfo
- Publication number
- CN1074037C CN1074037C CN 96115577 CN96115577A CN1074037C CN 1074037 C CN1074037 C CN 1074037C CN 96115577 CN96115577 CN 96115577 CN 96115577 A CN96115577 A CN 96115577A CN 1074037 C CN1074037 C CN 1074037C
- Authority
- CN
- China
- Prior art keywords
- pour point
- crude oil
- point depressant
- molecular copolymer
- ester
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lubricants (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Liquid Carbonaceous Fuels (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The present invention relates to a pour depressant which is suitable for high coagulation crude oil which comprises 30 to 51% of wax, and has a solidification point of 40 to 67 DEG C, which is compounded from a high molecular copolymer and a surfactant, wherein the high molecular copolymer is formed by the copolymerization of unsaturated acid C 16 to 20 ester (or C 16 to 24 alpha olefin) and other kinds of unsaturated matter; the surfactant is a cationic or anionic surfactant such as sodium dodecylbenzenesulfonate, sodium dodecylsulfate and hexadecanetrimethyl quaternary ammonium bromide. The high molecular copolymer and the surfactant are mixed to be prepared into the pour depressant according to a proportion of 1:50 to 150. The pour depressant is injected into crude oil to be treated for 10 minutes at 120 DEG C, and the solidification point of the crude oil can be lowered by 12 DEG C.
Description
The present invention relates to a kind of synthetic method and application of pour point depressant.Because pour point depressant is to the highly selective of crude oil, this pour point depressant is fit to the high content of wax (30～51%), and the crude oil of high-solidification point (40～67 ℃) uses.
Solving the exploitation of crude oil with high solidifying point and carrying mainly is to rely on heating viscosity reduction, the method for O/w emulsion and pour point depressant.Heating viscosity reduction method fuel consumption is too big, and the O/w emulsion rule causes dehydration problem, and the method for pour point depressant is easy and simple to handle, no aftertreatment, the favor of current extremely oil field.But because pour point depressant is very strong to the crude oil specific aim, bibliographical information is to the pour point depressant effect that the high content of wax (30～51%) high-solidification point (40～67 ℃) crude oil uses all not good (Song welcome etc., oilfield chemistry, 1995, VOL.12, NO.2,185).
The purpose of this invention is to provide a kind of pour point depressant and select the suitable applications condition to make above-mentioned crude oil with high solidifying point depression of the freezing point.
Pour point depressant provided by the invention is the compound of a kind of high-molecular copolymer and tensio-active agent.This high-molecular copolymer is unsaturated acid C
16-24Ester or C
16-24The multipolymer of alhpa olefin and other unsaturated organic compounds.Unsaturated acid C
16-24The ester of alcohol is various unsaturated acid such as vinylformic acid, maleic acid, FUMARIC ACID TECH GRADE etc. and C
16-24The esterification products of alcohol, other unsaturatess are vinyl acetate between to for plastic, vinylbenzene, maleic acid, FUMARIC ACID TECH GRADE etc.Feature of the present invention is: unsaturated acid C in the high-molecular copolymer
16-24Ester or C
16-24Alhpa olefin and other unsaturated compound proportionings are 1/1～20/1, are the best with 1/1～5/1 wherein, and high molecular nonpolar long-chain side chain C number has certain proportion to distribute at 16～25, and polar side chain C number is less than 5; Tensio-active agent is an ionogenic surfactant, and special anionic or cationic surfactant can not only disperse and solubilising paraffin, and itself have pour-point depressing process; Aniorfic surfactant can be selected alkyl sodium sulfonate or sodium alkyl sulfate such as sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, sodium stearyl sulfate for use; Cats product can be selected cetyl trimethyl quaternary ammonium bromides etc. for use.High-molecular copolymer is 1: 50～150 (weight) with the ratio that cooperates of tensio-active agent in the pour point depressant, and preferable cooperation ratio is 1: 80～110.
Treatment temp and treatment time are remarkable to the pour point depression of crude oil influential effect when application conditions of pour point depressant such as the injection rate of pour point depressant, pour point depressant injection crude oil, treatment temp generally makes it to mix being higher than under 10～20 ℃ of temperature of former oil freezing point pour point depressant added, and preferable temperature ranges is 80～120 ℃; Treatment time should be no less than 2 minutes, and to guarantee pour point depressant and crude oil thorough mixing, the general treatment time is 2～15 minutes; The addition of pour point depressant can reduce temperature and decides according to actual needs, but it is too much to add the amount of pour point depressant, will improve the cost of crude oil, general add-on be crude oil heavy 0.05～2%, can make former oil freezing point fall 8～11 ℃; Under the best applications condition, pour point depressant provided by the invention can make depression of the freezing point 12 ℃ of crude oil.
The preparation method of crude oil with high solidifying point pour point depressant of the present invention can press step:
1. synthetic macromolecule multipolymer
Use unsaturated acid C
16-24Ester or C
16-24Alhpa olefin and unsaturated macromolecular compound generation copolyreaction synthetic copolymer, reaction technology is routinely carried out.
2. preparation pour point depressant
To go up the synthetic multipolymer mixes with ionogenic surfactant and can be mixed with pour point depressant.
Below by example pour point depressant provided by the invention is described further.
Synthesizing of example 1 high-molecular copolymer
In two mouthfuls of reaction flasks of 50ml, add vinylformic acid C successively
16-24Ester 7.4g, vinyl acetate between to for plastic 2.2g makes the benzene 14.4g of solvent, heating makes reactants dissolved, adds the Diisopropyl azodicarboxylate 0.096g as initiator then, 80 ℃ of temperature of reaction, backflow 8hr gets solvent-laden high-molecular copolymer, and this multipolymer does not influence its use.Also can after back flow reaction, continue heating (80 ℃), separated from solvent is gone out, get vinylformic acid C
16-24Ester-acetate ethylene copolymer.
The preparation of example 2 pour point depressants
Example 1 is made multipolymer, press the pure block copolymer amount and calculate, add 100 times Sodium dodecylbenzene sulfonate, thorough mixing promptly is mixed with pour point depressant of the present invention.
Embodiment 3 injects Shenyang crude oil (content of wax 30～51%, zero pour 40～67%) with example 1 described high-molecular copolymer under differing temps, former oil freezing point result of variations sees Table 1.
The influence that table 1 high-molecular copolymer changes former oil freezing point
The multipolymer amount is 100ppm, treatment time 10min.
| Treatment temp ℃ former oil freezing point ℃ reduction value ℃ |
| 80 42 6 90 41 7 100 41 7 110 40 8 120 39 9 |
Example 4 injects the Shenyang crude oil with Sodium dodecylbenzene sulfonate under differing temps, former oil freezing point result of variations sees Table 2.
The influence that table 2 tensio-active agent changes former oil freezing point
| Treatment temp ℃ former oil freezing point ℃ reduction value ℃ |
| 80 42 6 90 42 6 100 41 7 110 41 7 120 40 8 |
Tensio-active agent injection rate 10000ppm, treatment time 10min.
Example 5 will inject the Shenyang crude oil by the pour point depressant of example 1,2 described method preparation under differing temps, former oil freezing point result of variations sees Table 3.
The influence that table 3 pour point depressant changes former oil freezing point
| Treatment temp ℃ former oil freezing point ℃ reduction value ℃ |
| 80 40 8 90 40 8 100 39 9 110 37 11 120 36 12 126 36 12 |
By the multipolymer injection rate is 100ppm, Sodium dodecylbenzene sulfonate injection rate 10000ppm, treatment time 10min.
By above-mentioned example, utilize pour point depressant provided by the invention can make the depression of the freezing point of crude oil with high solidifying point reach 12 ℃, and the synthetic method of this pour point depressant is simple, easy to use, be suitable for using.
Claims (2)
1. the pour point depressant of a crude oil with high solidifying point is characterized in that it being high-molecular copolymer and the tensio-active agent compound by 1: 50～150 weight ratio mixed preparing; So-called high-molecular copolymer is vinylformic acid C
16-24Ester and vinyl acetate between to for plastic carry out the vinylformic acid C that copolyreaction makes
16-24Ester-acetate ethylene copolymer, tensio-active agent are Sodium dodecylbenzene sulfonatees.
2. according to the described pour point depressant of claim 1, it is characterized in that unsaturated acid vinylformic acid C in the high-molecular copolymer
16-24Ester and unsaturated organic compound vinyl acetate between to for plastic proportioning are 1: 1～20: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115577 CN1074037C (en) | 1996-09-04 | 1996-09-04 | Pour point reducer for high pour point crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115577 CN1074037C (en) | 1996-09-04 | 1996-09-04 | Pour point reducer for high pour point crude oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1175614A CN1175614A (en) | 1998-03-11 |
| CN1074037C true CN1074037C (en) | 2001-10-31 |
Family
ID=5122813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96115577 Expired - Fee Related CN1074037C (en) | 1996-09-04 | 1996-09-04 | Pour point reducer for high pour point crude oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074037C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001096503A2 (en) * | 2000-06-15 | 2001-12-20 | Clariant International Ltd | Additives for improving the cold flow properties and the storage stability of crude oil |
| CN1302085C (en) * | 2005-03-25 | 2007-02-28 | 山东大学 | Multifunctional |
| CN101712787B (en) * | 2008-10-08 | 2012-01-11 | 中国石油天然气集团公司 | Sulfonic acid-containing organic macromolecule reaction type crude oil flow modifying agent |
| CN104710560B (en) * | 2013-12-13 | 2017-06-06 | 中国石油天然气集团公司 | A kind of dicyclopentadiene and Long Chain Alkyl Acrylate polymer pour point depressant for crude oil |
| CN104694106B (en) * | 2015-03-05 | 2016-02-17 | 黑龙江信维源化工有限公司 | One is suitable for Weak Base ASP Flood oil sulfosalt surfactant and application |
| CN105524216B (en) * | 2015-11-04 | 2018-01-26 | 宁波蓝润能源科技股份有限公司 | A kind of environment-friendly type pour-point depressant and preparation method thereof |
| CN106468396A (en) * | 2016-08-28 | 2017-03-01 | 山东成泰化工有限公司 | A kind of petroleum pour depressant of hexahydro-phthalic acid two high-carbon alcohol ester |
| CN106811187B (en) * | 2017-01-20 | 2019-08-30 | 中国石油大学(华东) | Pour point depressant for crude oil and preparation method thereof |
| CN108409910B (en) * | 2018-04-16 | 2022-04-22 | 青岛大学 | Acrylate grafted alcoholysis EVA (ethylene-vinyl acetate) crude oil pour point depressant and preparation method thereof |
| CN108456279B (en) * | 2018-04-26 | 2020-03-31 | 杨冰川 | Crude oil pour point depressant, and preparation method and application thereof |
-
1996
- 1996-09-04 CN CN 96115577 patent/CN1074037C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1175614A (en) | 1998-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1074037C (en) | Pour point reducer for high pour point crude oil | |
| US6100221A (en) | Aqueous external crystal modifier dispersion | |
| CN108329901B (en) | Emulsion type thickening agent for fracturing fluid and preparation method and application thereof | |
| CN100556980C (en) | A kind of efficient thick-oil emulsified adhesive-reducing agent | |
| CN100460448C (en) | Preparation method of multifunctional resistance-reducing polymer suspension | |
| US4588640A (en) | Particulate compositions | |
| CN110437817A (en) | A kind of multi-functional emulsion-type salt tolerant fracturing fluid and preparation method thereof | |
| WO2018188523A1 (en) | Maleic anhydride copolymer with broadly dispersed ester side chain as wax inhibitor and wax crystallation enhancer | |
| CN102766491B (en) | Low-temperature fluidity improver for diesel oil | |
| US20080064785A1 (en) | Bi- or Multi-Modal Particle Size Distribution To Improve Drag Reduction Polymer Dissolution | |
| CN103059584B (en) | A kind of warm mix modified pitch emulsion and preparation method thereof | |
| US4419106A (en) | Hydrocarbon oils with improved pour points | |
| DE2210430A1 (en) | VISCOSITY INDEX IMPROVED LUBRICATING OIL AND ITS MANUFACTURING | |
| EP0486836B1 (en) | Petroleum middle distillate with improved cold flow characteristics | |
| US4547202A (en) | Hydrocarbon oils with improved pour points | |
| RU2098459C1 (en) | Petroleum and petroleum derivative additives | |
| CN114015483B (en) | Ternary composite biodiesel pour point depressant and preparation and application thereof | |
| US4726811A (en) | Hydrocarbon oils with improved pour points | |
| CN109114426B (en) | Composition for crude oil pour point depressant, preparation method and application | |
| CN1253537C (en) | Emulsified microcrystalline wax and its prepn | |
| CN1079501A (en) | Viscosity improver of lubricating oil and preparation thereof | |
| CN104498011A (en) | Dendritic oil-soluble viscosity reducer for thickened oil | |
| US3846092A (en) | Crude oils and fuel oils of improved pour point depressant and flowability properties | |
| CN100497550C (en) | Process for preparing organic magnesium alumen-removing agent | |
| CN116041971B (en) | Emulsified asphalt modifier and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |