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A kind of degreasing agent for ASP flooding produced water and preparation method thereof

A ternary compound and degreasing agent technology, which is applied in mining wastewater treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of unsuitable degreasing treatment, poor demulsification effect, etc., and achieve high degreasing efficiency , reduced viscosity, simple synthesis process

Active Publication Date: 2019-10-11
HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 the oil-in-water emulsion is poor, and at the same time, the deoiler is not suitable for the deoiling treatment of the sewage produced by the ASP flooding with complex components

Method used

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  • A kind of degreasing agent for ASP flooding produced water and preparation method thereof
  • A kind of degreasing agent for ASP flooding produced water and preparation method thereof
  • A kind of degreasing agent for ASP flooding produced water and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

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

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

[0032] Degreaser H 1 2,5-pyridinediamine reacts with formaldehyde and formic acid to form an intermediate, and then reacts with sodium chlordodecanoate to form a zwitterionic degreaser, in which 2,5-pyridinediamine, formaldehyde, formic acid and chlordodecanoate The molar ratio of sodium bicarbonate is 1:2.5:2.5:0.8. Degreaser H 1 The molecular formula is as follows:

[0033]

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

[0035] ① Add 1mol of 2,5-pyridinediamine and 1091.5g of cyclohexanol into a three-necked flask, install a reflux condenser with a water separator, stir at 230rpm, heat up to 30°C, and add 2.5mol of formic acid Pour into the constant pressure dropping funnel, control the titration speed, so that the formic acid is dropped within 20 minutes, after the formic acid is dropped, a...

Embodiment 2

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

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

[0041] Degreaser H2 2,5-pyridinediamine reacts with formaldehyde and formic acid to form an intermediate, and then reacts with sodium chlordodecanoate to form a zwitterionic degreaser, in which 2,5-pyridinediamine, formaldehyde, formic acid and chlordodecanoate The molar ratio of sodium bicarbonate is 1:3:3:1.5. Degreaser H 1 The molecular formula is as follows:

[0042]

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

[0044] ①Put 1mol of 2,5-pyridinediamine and 1637.3g of benzene into a three-necked flask, install a reflux condenser with a water separator, stir at 200rpm, heat up to 32°C, pour 3mol of formic acid into a constant In the pressure dropping funnel, control the titration speed so that the formic acid is dropped within 28 minutes. After the formic acid is dropped, adjust the stirring...

Embodiment 3

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

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

[0050] Degreaser H 3 2,5-pyridinediamine reacts with formaldehyde and formic acid to form an intermediate, and then reacts with sodium chlordodecanoate to form a zwitterionic degreaser, in which 2,5-pyridinediamine, formaldehyde, formic acid and chlordodecanoate The molar ratio of sodium bicarbonate is 1:5:4:2. Degreaser H 3 The molecular formula is as follows:

[0051]

[0052] (2) Degreaser H 3 The preparation method is as follows:

[0053] ①Put 1mol of 2,5-pyridinediamine and 2183g of cyclohexanol into a three-necked flask, install a reflux condenser with a water separator, stir at 270rpm, heat up to 35°C, pour 4mol of formic acid into In the constant pressure dropping funnel, control the titration speed so that the formic acid is dripped within 24 minutes. After the formic acid is dripped, adjust the stirrin...

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Abstract

The invention belongs to the technical field of oilfield sewage treatment, and in particular relates to a degreaser for produced water produced by three-element compound flooding. Sodium diacid reacts to generate zwitterionic degreasing agent, and the mol ratio of described 2,5-pyridinediamine, formaldehyde, formic acid and sodium chlorododecanoate is 1: 2.5~6: 2.5~5.5: 0.8~2.5, Preferably it is 1:3:3:1.5. The degreasing agent of the present invention has the characteristics of simple preparation, strong adaptability, low cost, strong salt resistance and good degreasing effect, and the salt resistance reaches 2.3×10 4 mg / L, the oil removal rate of ASP flooding produced water is above 97%. And the recovered oil produced by the separation does not affect the subsequent dehydration of crude oil, therefore, the present invention can be widely applied in the oil removal process of the ASP flooding produced water.

Description

technical field [0001] The invention relates to a degreasing agent for oil field sewage treatment, in particular to a degreasing agent for three-element compound flooding produced water and a preparation method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/74B01F17/28B01F17/18B01F17/32C02F1/54C02F103/10C09K23/18C09K23/28C09K23/32
CPCC02F1/547C02F1/682C07D213/74C02F2103/10C09K23/00
Inventor 刘亭亭
Owner HENAN ZHENGJIA ENERGY ENVIRONMENTAL PROTECTION CO LTD
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