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A zwitterionic ternary compound flooding produced water degreaser

A ternary compound and amphoteric ion technology, applied in mining wastewater treatment, separation methods, liquid separation, etc., can solve the problems of poor demulsification effect, unsuitable oil removal treatment, etc., achieve high oil removal efficiency, easy to obtain and transport Preservation and Viscosity Reduction Effects

Active Publication Date: 2019-03-19
烟台索山机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent ZL201410455664.7 "A degreasing agent 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, this degreaser is not suitable for oil removal treatment of ASP flooding produced sewage

Method used

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  • A zwitterionic ternary compound flooding produced water degreaser
  • A zwitterionic ternary compound flooding produced water degreaser
  • A zwitterionic ternary compound flooding produced water degreaser

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: Degreaser K 1 and its preparation method

[0031] (1) Degreaser K 1 The composition, components and molecular formula are as follows:

[0032] Degreaser K 1 The degreaser is an intermediate formed by the reaction of 2-furan methylamine with formaldehyde and formic acid, and then reacted with sodium chlorododecanoate to generate a zwitterionic degreaser, in which 2-furyl methylamine, formaldehyde, formic acid and chlorodeca The mol ratio of sodium dioxate is 1: 1.25: 1.5: 1.5, and molecular formula is as follows:

[0033]

[0034] (2) Degreaser K 1 The preparation method is as follows:

[0035] ①Add 1mol of 2-furylmethylamine and 777g of benzene into a three-necked flask, install a reflux condenser with a water separator, stir at 230rpm, heat up to 35°C, pour 1.5mol of formic acid into the constant pressure drops In the liquid funnel, control the titration speed so that the formic acid is dripped within 40min. After the formic acid is dripped, adju...

Embodiment 2

[0039] Embodiment 2: Degreaser K 2 and its preparation method

[0040] (1) Degreaser K 2 The composition, components and molecular formula are as follows:

[0041] Degreaser K 2 The degreaser is an intermediate formed by the reaction of 2-furan methylamine with formaldehyde and formic acid, and then reacted with sodium chlorododecanoate to generate a zwitterionic degreaser, in which 2-furyl methylamine, formaldehyde, formic acid and chlorodeca The mol ratio of sodium dioxate is 1: 2.5: 4: 2, and molecular formula is as follows:

[0042]

[0043] (2) Degreaser K 2 The preparation method is as follows:

[0044] ① Add 1mol of 2-furylmethylamine and 985g of benzene into a three-necked flask, install a reflux condenser with a water separator, stir at 280rpm, heat up to 32°C, pour 4mol of formic acid into the constant pressure drop In the funnel, control the titration speed so that the formic acid is dripped within 45 minutes. After the formic acid is dripped, adjust the stir...

Embodiment 3

[0048] Embodiment 3: Degreaser K 3 and its preparation method

[0049] (1) Degreaser K 3 The composition, components and molecular formula are as follows:

[0050] Degreaser K 3 The degreaser is an intermediate formed by the reaction of 2-furan methylamine with formaldehyde and formic acid, and then reacted with sodium chlorododecanoate to generate a zwitterionic degreaser, in which 2-furyl methylamine, formaldehyde, formic acid and chlorodeca The mol ratio of sodium dioxate is 1: 4.5: 6: 3, and molecular formula is as follows:

[0051]

[0052] (2) Degreaser K 1 The preparation method is as follows:

[0053] ①Add 1mol of 2-furylmethylamine and 1230g of cyclohexanol into a three-necked flask, install a reflux condenser with a water separator, stir at 200rpm, heat up to 30°C, pour 6mol of formic acid into a constant pressure In the dropping funnel, control the titration speed so that the formic acid is dripped within 50 minutes. After the formic acid is dripped, adjust...

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Abstract

The invention belongs to the technical field of oil field sewage treatment, and particularly relates to an amphion type ASP flooding extraction water degreasing agent, wherein 2-furylmethylamine reacts with formaldehyde and formic acid to form an intermediate, and the intermediate reacts with sodium chlorolaurate to form the amphion type degreasing agent, wherein a molar ratio of the 2-furylmethylamine to the formaldehyde to the formic acid to the sodium chlorolaurate is 1:1.25-6:1.5-8:1.5-4, preferably 1:2.5:4:2. According to the present invention, the degreasing agent has advantages of simple preparation, strong adaptability, low cost, good salt resistance and good grease removing rate, wherein the salt resistance achieves 2.5*10<4> mg / L, and the grease removing rate achieves more than 97%; and the recovered grease produced through the separation does not affect the subsequent dewatering of the crude oil, such that the degreasing agent can be widely used for the degreasing process of ASP flooding extraction water.

Description

technical field [0001] The invention relates to a degreasing agent for oil field sewage treatment, in particular to a zwitterionic three-element compound flooding produced water degreasing agent. Background technique [0002] In recent years, my country has accelerated the promotion of tertiary oil recovery technology to maintain and increase crude oil production. Alkali-surfactant-polymer ASP flooding is a chemical flooding technology developed on the basis of surfactant flooding, alkaline water flooding and polymer flooding. Relevant studies have shown that ASP flooding can significantly increase recovery and has broad application prospects. [0003] However, due to the complex water quality of the wastewater produced by ASP flooding, which contains a large amount of residual alkali, surfactants and polymers (such as polyacrylamide PAM), the viscosity of the wastewater becomes larger, and the particle size of the sewage oil droplets becomes smaller, resulting in emulsific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/52C02F1/40C02F1/28C02F103/10
CPCC02F1/285C02F1/40C02F2103/10C07D307/52
Inventor 刘亭亭
Owner 烟台索山机械有限公司
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