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A kind of degreasing agent for binary composite flooding sewage containing heterocyclic quaternary ammonium salt and its preparation method

A binary compound flooding, quaternary ammonium salt technology, applied in the direction of flocculation/sedimentation water/sewage treatment, organic chemistry, etc. Satisfy environmental protection, simple synthesis process, and promote the effect of increasing flocculation

Active Publication Date: 2018-12-11
安徽创宇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Binary compound flooding can significantly increase oil recovery and has broad application prospects. However, because the produced water of binary compound flooding contains a large amount of polyacrylamide and surfactants, the viscosity of sewage becomes larger and the diameter of oil droplets in sewage becomes larger. Small, resulting in serious emulsification of sewage, and its treatment is difficult
Degreasers are roughly divided into the following two categories. One type has various ingredients and good degreasing effect, but has the disadvantages of complicated preparation process, poor salt resistance and high cost; The process is relatively simple, and the requirements for water quality are relatively low, but it has the disadvantage of poor degreasing effect
[0004] Patent ZL201410254042.8 "a composite flocculation degreasing agent for oily sewage treatment" is made of aluminum sulfate, magnesium chloride, magnesium hydroxide, bentonite and polyacrylamide. High efficiency, simple preparation, low cost, etc., but the degreasing agent needs to use corrosive magnesium hydroxide, which has a strong corrosive effect on equipment
At the same time, a large amount of magnesium ions and aluminum ions are used in this invention, which easily react with polymers or surfactants in binary compound flooding, resulting in precipitation, which is difficult to apply to the treatment of produced water in binary compound flooding

Method used

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  • A kind of degreasing agent for binary composite flooding sewage containing heterocyclic quaternary ammonium salt and its preparation method
  • A kind of degreasing agent for binary composite flooding sewage containing heterocyclic quaternary ammonium salt and its preparation method
  • A kind of degreasing agent for binary composite flooding sewage containing heterocyclic quaternary ammonium salt and its preparation method

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Embodiment 1

[0031] Embodiment 1: Degreaser P 1 and its preparation method

[0032] (1) Degreaser P 1 The composition, components and molecular formula are as follows:

[0033] Degreaser P 1 It is obtained by reacting 2-furylmethylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:5:1.5:3.0. The molecular formula is as follows:

[0034]

[0035] where R is C 12 straight-chain alkanes.

[0036] (2) Degreaser P 1 The preparation method is as follows:

[0037] ①Add 1 mol of 2-furylmethylamine to a three-necked flask equipped with an electric stirrer, reflux condenser, and thermometer, then add 15 mol of ethanol as a solvent, heat up to 50°C, stir for 20 minutes at a stirring rate of 250 rpm, and then add 1.5 mol of For cyclohexanone, the temperature was raised to 70° C., the stirring rate was 300 rpm, the temperature was lowered to 30° C. after continuous stirring for 20 minutes, and then the pH value was adjusted to 3 with 15% hydrochloric acid to...

Embodiment 2

[0041] Embodiment 2: Degreaser P 2 and its preparation method

[0042] (1) Degreaser P 2 The composition, components and molecular formula are as follows:

[0043] Degreaser P 2 It is obtained by reacting 2-furylmethylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:6:1.6:4. The molecular formula is as follows:

[0044]

[0045] where R is C 14 straight-chain alkanes.

[0046] (2) Degreaser P 2 The preparation method is as follows:

[0047]①Add 1mol of 2-furylmethylamine to a three-necked flask equipped with an electric stirrer, reflux condenser and thermometer, then add 12mol of ethanol as a solvent, heat up to 40°C, stir for 10min at a stirring rate of 200rpm, and then add 1.6mol For cyclohexanone, the temperature was raised to 60° C., the stirring rate was 400 rpm, the temperature was lowered to 35° C. after continuous stirring for 25 minutes, and then the pH value was adjusted to 2 with 15% hydrochloric acid to obtain a mixtur...

Embodiment 3

[0051] Embodiment 3: Degreaser P 3 and its preparation method

[0052] (1) Degreaser P 3 The composition, components and molecular formula are as follows:

[0053] Degreaser P 3 It is obtained by reacting 2-furylmethylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:7:1.8:4.5. The molecular formula is as follows:

[0054]

[0055] where R is C 16 straight-chain alkanes.

[0056] (2) Degreaser P 3 The preparation method is as follows:

[0057] ①Add 1mol of 2-furylmethylamine to a three-necked flask equipped with an electric stirrer, reflux condenser and thermometer, then add 10mol of ethanol as a solvent, heat up to 45°C, stir for 30min at a stirring rate of 300rpm, and then add 1.8mol For cyclohexanone, the temperature was raised to 65° C., the stirring rate was 330 rpm, the temperature was lowered to 32° C. after continuous stirring for 30 minutes, and then the pH value was adjusted to 5 with 15% hydrochloric acid to obtain a mix...

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Abstract

The invention belongs to the technical field of oilfield sewage disposal, and particularly relates to a degreasing agent containing heterocyclic quaternary ammonium binary composite flooding sewage. The degreasing agent is prepared in the steps of performing condensation reaction on 2-furylmethylamine, formaldehyde and cyclohexanone so as to obtain Minnich alkali, and then reacting with alkyl chloride, wherein the molar ratio of the 2-furylmethylamine to the formaldehyde to the cyclohexanone to the alkyl chloride is 1:(5 to 8):(1.5 to 2):(3 to 5), and preferably, the molar ratio is 1:7:1.8:4.5. The degreasing agent has the advantages of simplicity in preparation, high adaptability and low cost, and the degreasing rate reaches up to 95% or above; subsequent crude oil dehydration cannot be influenced by separate recovered oil, and therefore, the degreasing agent can be widely applied to a degreasing process of binary composite produced flooding water.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a degreasing agent for binary compound flooding sewage containing a heterocyclic quaternary ammonium salt and a preparation method thereof. Background technique [0002] Most of the oilfields in eastern my country have entered the late stage of high water cut. In order to enhance oil recovery, polymer injection flooding technology and binary compound flooding (polymer and surfactant) new tertiary oil recovery technologies have been widely used. Binary compound flooding can significantly increase oil recovery and has broad application prospects. However, due to the large amount of polyacrylamide and surfactant in the produced water of binary compound flooding, the viscosity of sewage becomes larger and the diameter of oil droplets in sewage becomes larger. Small, resulting in serious emulsification of sewage, and its treatment is difficult. [0003] The curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/52C02F1/54
CPCC02F1/54C07D307/52
Inventor 赵世芬
Owner 安徽创宇新材料科技有限公司
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