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A kind of binary composite water flooding degreasing agent and preparation method thereof

A binary compound flooding and degreaser technology, which is applied in separation methods, flocculation/sedimentation water/sewage treatment, mining wastewater treatment, etc., can solve the problem of single degreaser composition, increased sewage viscosity, and oil droplet particle size change. Small and other problems, to achieve the effect of meeting environmental protection, promoting flocculation increase, and low addition amount

Active Publication Date: 2019-06-07
天津市顺超有限公司
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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 binary composite water flooding degreasing agent and preparation method thereof
  • A kind of binary composite water flooding degreasing agent and preparation method thereof
  • A kind of binary composite water flooding degreasing agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

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

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

[0032] Degreaser G 1 It is obtained by reacting benzylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:5:1.2:2.5, and the molecular formula is as follows:

[0033]

[0034] where R is C 8 straight-chain alkanes.

[0035] (2) Degreaser G 1 The preparation method is as follows:

[0036] ① Add 1 mol of benzylamine to a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, then add 10 mol of ethanol as a solvent, heat up to 40°C, stir for 10 min at a stirring rate of 300 rpm, and then add 1.2 mol of cyclic For hexanone, the temperature was raised to 65 ° C, the stirring rate was 400 rpm, the temperature was lowered to 30 ° C after continuous stirring for 20 minutes, and then the pH value was adjusted to 2 with 15% hydrochloric acid to obtain ...

Embodiment 2

[0040] Embodiment 2: Degreaser G 2 and its preparation method

[0041] (1) Degreaser G 2 The composition, components and molecular formula are as follows:

[0042] Degreaser G 2 It is obtained by reacting benzylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:6:1.8:3, and the molecular formula is as follows:

[0043]

[0044] where R is C 9 straight-chain alkanes.

[0045] (2) Degreaser G 2 The preparation method is as follows:

[0046] ① Add 1 mol of benzylamine to a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, then add 15 mol of ethanol as a solvent, heat up to 40°C, stir for 15 min at a stirring rate of 330 rpm, and then add 1.8 mol of cyclo For hexanone, the temperature was raised to 62 ° C, the stirring rate was 500 rpm, the temperature was lowered to 32 ° C after continuous stirring for 20 minutes, and then the pH value was adjusted to 3 with 15% hydrochloric acid to obtain a m...

Embodiment 3

[0050] Embodiment 3: Degreaser G 3 and its preparation method

[0051] (1) Degreaser G 3 The composition, components and molecular formula are as follows:

[0052] Degreaser G 3 It is obtained by reacting benzylamine, formaldehyde, cyclohexanone and chloroalkane according to the molar ratio of 1:8:1.5:4. The molecular formula is as follows:

[0053]

[0054] where R is C 10 straight-chain alkanes.

[0055] (2) Degreaser G 3 The preparation method is as follows:

[0056] ① Add 1 mol of benzylamine to a three-necked flask equipped with an electric stirrer, a reflux condenser, and a thermometer, then add 18 mol of ethanol as a solvent, heat up to 40°C, stir for 25 min at a stirring rate of 370 rpm, and then add 1.5 mol of cyclic For hexanone, the temperature was raised to 60°C, the stirring rate was 450rpm, the temperature was lowered to 33°C after continuous stirring for 20 minutes, and then the pH value was adjusted to 4 with 15% hydrochloric acid to obtain a mixture ...

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Abstract

The invention belongs to the technical field of oil field sewage treatment, and particularly relates to a binary compound flooding sewage degreasing agent. Benzene methanamine, formaldehyde and cyclohexanone are subjected to condensation reaction to obtain Minnich alkali and then react with alkyl chloride to obtain the degreasing agent. The mole ratio of the benzene methanamine, the formaldehyde, the cyclohexanone to the alkyl chloride is 1:(5-10):(1.2-2):(2.5-5), and preferably 1:8:1.5:4. The degreasing agent is simple in prepare, high in adaptability, low in cost and high in degreasing rate reaching 95% or more, and recovered oil generated by separation cannot affect subsequent crude oil dehydration, so that the degreasing agent can be widely applied to the degreasing process of binary compound flooding produced water.

Description

technical field [0001] The invention relates to a degreasing agent for sewage treatment, in particular to a binary composite flooding sewage degreasing agent 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 current conventional treatment process (natural settlement-coagulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/54C02F103/10
CPCC02F1/40C02F1/54C02F2103/10
Inventor 赵世芬
Owner 天津市顺超有限公司
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