CN102079799B - Preparation method of binary polymer wax oil pour point reducer - Google Patents
Preparation method of binary polymer wax oil pour point reducer Download PDFInfo
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- CN102079799B CN102079799B CN2010105917199A CN201010591719A CN102079799B CN 102079799 B CN102079799 B CN 102079799B CN 2010105917199 A CN2010105917199 A CN 2010105917199A CN 201010591719 A CN201010591719 A CN 201010591719A CN 102079799 B CN102079799 B CN 102079799B
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- maleic anhydride
- pour point
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- wax oil
- point depressant
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Abstract
The invention discloses a preparation method of a binary polymer wax oil pour point reducer, relating to a preparation method of a chemical preparation. The preparation method is characterized in that the wax oil pour point reducer is formed by the steps of firstly esterifying maleic anhydride and octadecanol and then polymerizing with vinylacetate. The preparation method comprises the steps of: firstly, preheating the maleic anhydride, the octadecanol and a methylbenzene mixed solution used as a solvent and a water carrying agent to be clear, adding a catalyst, continuously heating to be boiled, reacting, then carrying out reduced pressure distillation to obtain the dioctadecyl maleic anhydride; and then mixing the dioctadecyl maleic anhydride with the vinylacetate and an initiating agent BPO (benzoyl peroxide), and polymerizing the dioctadecyl maleic anhydride with the vinylacetate to obtain a final product of a dioctadecyl maleic anhydride-vinylacetate polymer (PMVA). The novel pour point reducer has excellent wax oil pour point reducing effect and more stable performance, and is applied to the fields of extraction and transportation of petroleum.
Description
Technical field
The present invention relates to a kind of preparation method of chemical industry preparation, particularly relate to a kind of preparation method of binary polymer wax oil pour point depressant.
Background technology
Along with the development of oil and petrochemical industry, the rheological property of wax oil receives people's attention day by day.Wax oil mainly is meant normal pressure wax oil and wax tailings, and the normal pressure wax oil is can be as catalysis and pyrogenic raw material from the atmospheric unit output, and wax tailings mainly is used in the boats and ships aspect from the coker output.Owing to contain a large amount of wax components in the wax oil, thus its zero pour than higher, thereby increased many difficulties to the oil transportation operation.Thereby reduce its zero pour and improve its flowing property and also just become top priority.
Therefore, the method that attracts most attention at present is to reduce oil product solidifying point to add chemicaladditives, makes it be easy to flow.In high wax oil, the existence of hydrocarbon solid makes the low temperature rheological behaviour of oil product become complicated.The solvability of wax in oil product reduces with temperature and reduces.When temperature dropped to a certain value, wax oil began to separate out small crystal grain, is linked to be reticulated structure then, wrapped in oil wherein, so wax oil has lost flowability.In wax oil, add pour point depressant, i.e. high molecular polymer can change the crystal habit of solid wax in the wax oil, like crystal size, size and shape etc., makes it be difficult for forming spacial framework, reaches pour point depression, dehesion, improves the purpose of wax oil low-temperature fluidity.
The pour point depressant of research is of a great variety both at home and abroad, generally can be divided three classes: alkylnaphthalene class, polyolefins and polyester.Though various countries are more active to the research of pour point depressant in recent years, the pour point depressant that is exclusively used in the wax oil field also rarely has report.Have only the document introduction of only a few to cross and add pour point depressant for crude oil to be used for reducing wax oil in the pipeline of carrying wax oil condensation point.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of binary polymer wax oil pour point depressant; Be by maleic anhydride, the esterification of stearyl alcohol elder generation; A kind of novel wax oil pour point depressant that generates with the vinyl acetate between to for plastic polyisocyanate polyaddition again; Be applied in the exploitation and transport field of oil, provide a kind of performance more stable, the novel pour point depressant superior wax oil pour point depression effect.
The objective of the invention is to realize through following technical scheme:
A kind of preparation method of binary polymer wax oil pour point depressant, this pour point depressant is with maleic anhydride, the esterification of stearyl alcohol elder generation, and then the wax oil pour point depressant that forms with the vinyl acetate between to for plastic polyisocyanate polyaddition; Comprise the process of being prepared as follows: earlier maleic anhydride, stearyl alcohol are preheated to clarification with the toluene mixing solutions of the azeotropic agent of holding concurrently as solvent, the adding catalyzer continues to be heated to boiling; Reaction; Carry out underpressure distillation again, obtain the maleic anhydride octadecyl ester, again the maleic anhydride octadecyl ester that obtains is mixed with vinyl acetate and initiator B PO; Maleic anhydride octadecyl ester and vinyl acetate carry out polymerization, get final product maleic anhydride octadecyl ester-vinyl acetate polymer (PMVA).
The preparation method of described a kind of binary polymer wax oil pour point depressant, described maleic anhydride and stearyl alcohol reaction mol ratio are 1:2; The esterification time of maleic anhydride and stearyl alcohol is 3h.
The preparation method of described a kind of binary polymer wax oil pour point depressant, described catalytic amount, the total mass meter of maleic anhydride and stearyl alcohol is 1.5%.
The preparation method of described a kind of binary polymer wax oil pour point depressant, described toluene solvant amount, the total mass meter of total overall reaction thing is 37%.
The preparation method of described a kind of binary polymer wax oil pour point depressant, the mol ratio of described maleic anhydride octadecyl ester and vinyl acetate is 1:3.
The preparation method of described a kind of binary polymer wax oil pour point depressant, described initiator B PO amount massfraction, the total mass meter of maleic anhydride, stearyl alcohol, catalyzer and vinyl acetate is 1.5%.
The preparation method of described a kind of binary polymer wax oil pour point depressant, the polymerization temperature of described maleic anhydride octadecyl ester and vinyl acetate is 70 ℃.
The preparation method of described a kind of binary polymer wax oil pour point depressant, the polymerization time of described maleic anhydride octadecyl ester and vinyl acetate is 3h.
Advantage of the present invention and effect are:
1. the present invention is 0.32% o'clock adding dosage (accounting for the massfraction of wax oil in pour point depressant), and the pour point depression effect is preferable, and the maximum range of decrease of condensation point can reach 24 ℃.
2. the pour point depressant performance of the present invention's preparation is more stable, and wax oil pour point depression effect is superior.
Embodiment
Be elaborated in the face of the present invention down.
Wax oil pour point depressant of the present invention is by maleic anhydride and stearyl alcohol esterification, forms with vinyl acetate copolymerized again.
Embodiment:
In there-necked flask, adding maleic anhydride 4.903 g, stearyl alcohol 40.5735 g successively, is the solvent azeotropic agent of holding concurrently with toluene (9.0953 g).When the reaction beginning, carry out preheating earlier, reactant is mixed and dissolving fully, when treating the solution clarification, in the time of 80 ℃, add catalyzer 0.6821 g.Continue elevated temperature, until the solution boiling, the water that reaction generates enters into water trap with toluene, when treating that aquifer yield and theoretical value are suitable, stops heating.After reaction finishes, carry out underpressure distillation, solvent toluene is steamed the back with absolute ethanol washing three times, obtain the maleic anhydride octadecyl ester.
Esterification reaction product maleic anhydride octadecyl ester after purifying is placed there-necked flask, and will in water bath with thermostatic control, heat, vinyl acetate 12.9135 g and initiator B PO 1.1678 g are joined in the there-necked flask; Under the initiator effect; After maleic anhydride octadecyl ester and vinyl acetate carried out polyase 13 h, reaction finished, then with product with absolute ethanol washing three times; And separate with separating funnel, final product maleic anhydride octadecyl ester-vinyl acetate polymer (PMVA).
Claims (7)
1. the preparation method of a binary polymer wax oil pour point depressant is characterized in that, this pour point depressant is with maleic anhydride, the esterification of stearyl alcohol elder generation; And then the wax oil pour point depressant that forms with the vinyl acetate between to for plastic polyisocyanate polyaddition; Comprise the process of being prepared as follows: earlier maleic anhydride, stearyl alcohol are preheated to clarification with the toluene mixing solutions of the azeotropic agent of holding concurrently as solvent, the adding catalyzer continues to be heated to boiling; Reaction; Carry out underpressure distillation again, obtain the maleic anhydride octadecyl ester, again the maleic anhydride octadecyl ester that obtains is mixed with vinyl acetate and initiator B PO; Maleic anhydride octadecyl ester and vinyl acetate carry out polymerization, get final product maleic anhydride octadecyl ester-vinyl acetate polymer (PMVA);
Described maleic anhydride and stearyl alcohol reaction mol ratio are 1:2;
The mol ratio of described maleic anhydride octadecyl ester and vinyl acetate is 1:3.
2. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, the esterification time of maleic anhydride and stearyl alcohol is 3h.
3. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, described catalytic amount, and the total mass meter of maleic anhydride and stearyl alcohol is 1.5%.
4. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, described toluene solvant amount, and the total mass meter of total overall reaction thing is 37%.
5. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, described initiator B PO amount massfraction, and the total mass meter of maleic anhydride, stearyl alcohol, catalyzer and vinyl acetate is 1.5%.
6. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, the polymerization temperature of described maleic anhydride octadecyl ester and vinyl acetate is 70 ℃.
7. the preparation method of a kind of binary polymer wax oil pour point depressant according to claim 1 is characterized in that, the polymerization time of described maleic anhydride octadecyl ester and vinyl acetate is 3h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105917199A CN102079799B (en) | 2010-12-16 | 2010-12-16 | Preparation method of binary polymer wax oil pour point reducer |
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| CN2010105917199A CN102079799B (en) | 2010-12-16 | 2010-12-16 | Preparation method of binary polymer wax oil pour point reducer |
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| CN102079799A CN102079799A (en) | 2011-06-01 |
| CN102079799B true CN102079799B (en) | 2012-06-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327213B (en) * | 2014-10-15 | 2016-04-27 | 山东大学 | A kind of high wax viscous crude nano composite material pour point depressant and preparation method thereof |
| CN105542063B (en) * | 2016-02-03 | 2017-10-17 | 辽宁石化职业技术学院 | A kind of preparation method of quadripolymer diesel pour inhibitor |
| CN105524211B (en) * | 2016-02-05 | 2017-11-03 | 辽宁石化职业技术学院 | A kind of preparation method of quadripolymer diesel pour inhibitor |
| CN106367055B (en) * | 2016-08-23 | 2019-04-02 | 中国石油化工股份有限公司 | A kind of pour-point depressant and preparation method thereof of high-content wax viscous crude |
| CN109762537A (en) * | 2019-02-27 | 2019-05-17 | 郑州智锦电子科技有限公司 | A kind of preparation method of environment universality Multi-effect oilfield additive |
| CN115584253B (en) * | 2022-09-20 | 2023-08-25 | 中国石油天然气股份有限公司 | Multifunctional wax-proofing agent and preparation method thereof |
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| EP0155105A1 (en) * | 1984-03-14 | 1985-09-18 | Exxon Research And Engineering Company | Dialkyl fumarate-vinyl acetate copolymers useful as dewaxing aids |
| CN1618826A (en) * | 2003-11-19 | 2005-05-25 | 北京化工大学 | Method of copolymerization of maleic anhydride and vinyl acetate |
| CN101665730A (en) * | 2009-09-16 | 2010-03-10 | 中国石油大学(北京) | Diesel oil cold filter clogging temperature improving agent and preparation method thereof |
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| JPS6272706A (en) * | 1985-09-27 | 1987-04-03 | Nippon Oil & Fats Co Ltd | Vinyl acetate copolymer |
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| EP0155105A1 (en) * | 1984-03-14 | 1985-09-18 | Exxon Research And Engineering Company | Dialkyl fumarate-vinyl acetate copolymers useful as dewaxing aids |
| CN1618826A (en) * | 2003-11-19 | 2005-05-25 | 北京化工大学 | Method of copolymerization of maleic anhydride and vinyl acetate |
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