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A high-efficiency degreaser for oilfield polymer flooding produced water

A degreaser and polymer technology, applied in the direction of grease/oily substance/suspton removal device, flocculation/sedimentation water/sewage treatment, separation method, etc., can solve complex and changeable operation methods, poor demulsification effect, no Applicable to the oil removal treatment of polymer-containing sewage, etc., to achieve the effects of strong neutralization ability, improved oil removal efficiency, and high oil removal efficiency

Active Publication Date: 2019-09-06
山东瑞多节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex and changeable methods of ground implementation, the composition of sewage has obvious regional and timeliness
[0006] Patent ZL201410455664.7 "A degreaser for oilfield binary compound flooding produced sewage" uses acryloyloxyethyl dimethylamine, chloroalkane, acrylamide, N,N'-methylenebis Acrylamide, ammonium persulfate and sodium sulfite reacted. The degreasing agent has the characteristics of less dosage, low cost, high degreasing rate, high degreasing efficiency, simple preparation and low cost. However, the degreasing agent belongs to Reverse demulsifier, the demulsification effect on oil-in-water emulsion is poor, and at the same time, the degreasing agent is not suitable for degreasing treatment of sewage containing poly

Method used

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  • A high-efficiency degreaser for oilfield polymer flooding produced water
  • A high-efficiency degreaser for oilfield polymer flooding produced water
  • A high-efficiency degreaser for oilfield polymer flooding produced water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Degreaser A 1 And its preparation method

[0025] (1) Degreaser A 1 The composition and components are as follows:

[0026] Degreaser A 1 It is produced by reacting n-decanal with epibromobutane under the catalysis of boron trifluoride ether solution to form an intermediate, and then reacting with pyrimidine to form a cationic degreasing agent. Its molecular formula is as follows:

[0027]

[0028] Among them, the molar ratio of n-decanal, epibromobutane and pyrimidine is 1:1.2:0.9.

[0029] (2) Degreaser A 1 The preparation method is as follows:

[0030] ①In a three-necked flask equipped with an electric stirrer, reflux condenser and thermometer, add 1 mol of n-decanal, then add 1872g of carbon tetrachloride, heat to 30℃, stir at 300rpm for 10min, then add 0.078g A 30% mass concentration of boron trifluoride ether solution, 1.2 mol of epibromobutane is placed in a constant pressure dropping funnel, the dropping rate is controlled to 2 drops / min, the temperature is ra...

Embodiment 2

[0033] Example 2: Degreaser A 2 And its preparation method

[0034] (1) Degreaser A 2 The composition and components are as follows:

[0035] Degreaser A 2 It is produced by reacting n-decanal with epibromobutane under the catalysis of boron trifluoride ether solution to form an intermediate, and then reacting with pyrimidine to form a cationic degreasing agent. Its molecular formula is as follows:

[0036]

[0037] Among them, the molar ratio of n-decanal, epibromobutane and pyrimidine is 1:0.75:0.5.

[0038] (2) Degreaser A 2 The preparation method is as follows:

[0039] ①In a three-necked flask equipped with an electric stirrer, reflux condenser and thermometer, add 1 mol of n-decanal, then add 1560 g of acetonitrile, heat to 32°C, stir at 350 rpm for 25 min, and then add 0.10 g of mass concentration to 30% boron trifluoride ether solution, put 0.75mol of epibromobutane into the constant pressure dropping funnel, control the dropping rate to 3 drops / min, heat up to 50℃, stir at 400...

Embodiment 3

[0042] Example 3: Degreaser A 3 And its preparation method

[0043] (1) Degreaser A 3 The composition and components are as follows:

[0044] Degreaser A 3 It is produced by reacting n-decanal with epibromobutane under the catalysis of boron trifluoride ether solution to form an intermediate, and then reacting with pyrimidine to form a cationic degreasing agent. Its molecular formula is as follows:

[0045]

[0046] Wherein, the molar ratio of n-decanal, epibromobutane and pyrimidine is 1:1.5:2.

[0047] (2) Degreaser A 3 The preparation method is as follows:

[0048] ①In a three-necked flask equipped with an electric stirrer, reflux condenser and thermometer, add 1 mol of n-decanal, then add 2340g of carbon tetrachloride, heat to 35°C, stir at 400rpm for 30min, then add 0.156g A 30% mass concentration of boron trifluoride diethyl ether solution, 1.5 mol of epibromobutane is placed in a constant pressure dropping funnel, the dropping rate is controlled to 4 drops / min, the temperature i...

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Abstract

The invention belongs to the technical field of oil field wastewater treatment and specifically relates to an efficient de-oiling agent for water generated by oil field polymer flooding. The de-oiling agent is a cationic de-oiling agent which is generated according to the steps: causing n-capric aldehyde react with epoxy bromobutane under the catalysis of a boron trifluoride diethyl etherate solution, thereby acquiring a midbody, and then reacting with pyrimidine, wherein the mole ratio of n-capric aldehyde to epoxy bromobutane to pyrimidine is 1:(0.75-1.5):(0.5-2), preferably, 1:1.2:0.9. The de-oiling agent provided by the invention has the characteristics of simple preparation process, low cost, high adaptability and excellent de-oiling effect; the de-oiling rate is 97% or above; the efficient de-oiling agent can be widely applied to the de-oiling process of the water generated by oil field polymer flooding.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a high-efficiency degreasing agent used for polymer flooding produced water in an oil field. Background technique [0002] Polymer flooding technology has achieved good oil-increasing effects. Polymer flooding contains polyacrylamide (PAM). Due to the similarity between PAM and emulsifier molecules, the molecules in the PAM system are concentrated on the oil-water interface, and together with emulsified molecules, they form a composite membrane with greater strength and good elasticity. Based on the above characteristics, the oil content of wastewater produced by polymer flooding is relatively high. [0003] With the expansion of the application scale of polymer flooding, the subsequent problem is the treatment of polymer flooding sewage. The sewage of polymer flooding not only contains high oil content, but also contains a large amount of polymer. The presence of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/52
Inventor 吕小芳
Owner 山东瑞多节能环保科技有限公司
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