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A kind of polymer for crude oil pour point depressing and application thereof

A technology for high molecular polymer and crude oil pour point depressant, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of dependence on imports and the insufficiency of the variety and quantity of domestic crude oil pour point depressants, and reduce transportation costs. , The effect of improving low temperature fluidity and reducing pipeline energy consumption

Active Publication Date: 2015-08-19
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a decades-long gap between domestic research on crude oil point depressants and the international level. A large part of crude oil point depressants in the domestic market is dependent on imports. The variety and quantity of domestic crude oil point depressants are still far from satisfying the domestic market. need

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  • A kind of polymer for crude oil pour point depressing and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Synthesis of styrene-maleic anhydride high molecular polymer for crude oil pour point depressing

[0027] (1) Preparation method

[0028] Add 11.8 g (0.12 mol) of maleic anhydride and 100 mL of toluene into a 250 mL three-neck flask, blow nitrogen, stir and heat. When the temperature rises to 70 °C, under constant stirring, add 13.0 mL (0.12 mol) of styrene and 50 mL of azobisisobutyronitrile (0.1215 g) in toluene (benzoyl peroxide can also be used as the initiator), Add it to the reaction flask three times, and finish adding dropwise within 30 min. The temperature was controlled at about 80 °C, and the heating was stopped when the reactant became thick and the stirring was difficult, which lasted about 2 h. Cool to room temperature and filter with suction to obtain a white powdery solid. The product was washed with petroleum ether, suction filtered, and vacuum-dried to obtain a styrene-maleic anhydride polymer with a yield of 89.0%.

[0029] (2) Determin...

Embodiment 2

[0032] Example 2 Preparation of crude oil pour point depressant SMO-1

[0033] Using the styrene-maleic anhydride polymer and stearyl alcohol synthesized in Example 1 as raw materials, the reaction was carried out at a molar ratio of anhydride to stearyl alcohol of 1:1.1.

[0034] Take 1 g of styrene-maleic anhydride polymer, 1.5293 g of stearyl alcohol, 0.0253 g of p-toluenesulfonic acid as the catalyst, and use toluene as the solvent. Stir the reaction for 12 h at reflux temperature (about 110°C). Distill under reduced pressure to evaporate most of the toluene solvent, precipitate in methanol, filter the precipitate, wash with acetone, and dry in vacuo to obtain a white powder solid, which is crude oil pour point depressant SMO-1, with a yield of 83.0%.

[0035] The infrared spectrum of SMO-1 shows, 2920, 2850 cm -1 is the stretching vibration absorption peak of the alkyl group in the polymer, 1735 cm -1 It is the stretching vibration absorption peak of the ester bond, 7...

Embodiment 3

[0036] Example 3 Preparation of crude oil pour point depressant SMO-2

[0037] Using the styrene-maleic anhydride polymer and octadecylamine synthesized in Example 1 as raw materials, the reaction was carried out at a molar ratio of anhydride to octadecylamine of 1:1.1.

[0038] Take 1 g of styrene-maleic anhydride polymer and 1.5236 g of octadecylamine, use p-toluenesulfonic acid (0.0252 g) as catalyst, use dissolved amount of toluene as solvent, and stir the reaction at reflux temperature (about 110°C) 12 h. Most of the toluene solvent was removed by rotary evaporation, precipitated in methanol, the precipitate was suction filtered, washed with acetone, and dried in vacuo to obtain a white powder solid, which was crude oil pour point depressant SMO-2, with a yield of 85.0%.

[0039] The infrared spectrum of SMO-2 shows: 2919cm -1 , 2850cm -1 is the stretching vibration absorption peak of the alkyl group; 1698 cm -1 There is an absorption peak at , which is the absorpti...

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Abstract

The invention relates to a high-molecular polymer for crude oil depression and application of the high-molecular polymer. The high-molecular polymer is characterized by being prepared in the following steps of: adding monomer A, maleic anhydride and organic solvent into a polymerization reactor in nitrogen presence, heating to a temperature of between 80 and 90 DEG C, dripping an organic solution containing an initiating agent to react for 2 to 6 hours, separating polymer, rectifying, filtering and drying to obtain the high-molecular polymer for crude oil depression containing maleic anhydride, wherein the monomer A is styrene or N-vinyl pyrrolidone, the molar ratio of the monomer A to the maleic anhydride is 1 to 1, and the dosage of the initiating agent is 0.05 to 5.0 percent of the total weight of the monomer A and the maleic anhydride; modifying according to the molar ratio of the acid anhydride content in the polymer to long chain fatty alcohol or long chain fatty amine to be 1 to 1.1, reacting for 10 to 12 hours by using p-toluenesulfonic acid as a catalyst at a back-flow temperature to finally obtain the high-molecular polymer for crude oil depression. Depression effect testing results indicate that the polymer has good depression effect to crude oil in the Liaohe oilfield.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to the synthesis and application of a high molecular polymer for pour point depressing of crude oil. Background technique [0002] Most of the crude oil in my country has high wax content and high freezing point, so it cannot flow at room temperature or lower temperature, which brings difficulties to the extraction and transportation of crude oil and increases the cost of extraction and transportation. The reason for the poor low-temperature fluidity of crude oil is that under low temperature conditions, wax precipitates from crude oil in plate-like or needle-like crystals, and gathers to form a three-dimensional network structure, wrapping and depositing oil, gum, asphaltene, sludge, etc. in the oil pipeline On the wall, the effective diameter of the pipeline is reduced, which hinders the flow of crude oil. Adding crude oil point depressant is an effective method to i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F226/10C08F222/06C08F8/32C08F8/14C08F2/34C08F4/04C08F4/34C09K8/524C09K8/588
Inventor 夏立新刘文丽郝爱军
Owner LIAONING UNIVERSITY
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