Preparation method of reversed-phase demulsification water purifying agent for oil-containing sewage treatment of thickened oil

A technology for milk water purifier and oily water purifier, which is applied in the field of inverse demulsification and water purifier, and can solve problems such as poor high temperature resistance, easy adhesion of dirty oil into agglomerates, and impact on equipment separation efficiency.

Active Publication Date: 2019-04-16
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing water purifiers used in the treatment of oily sewage with heavy oil have poor high temperature resistance, reduced water purification performance, and large dosages
In addition, the dirty oil treated with the existing chemicals is easy to stick into agglomerates and adhere to the pipe wall and pipe of the inclined plate separator, which affects the separation efficiency of the equipment and increases the frequency of cleaning and cleaning operations

Method used

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  • Preparation method of reversed-phase demulsification water purifying agent for oil-containing sewage treatment of thickened oil
  • Preparation method of reversed-phase demulsification water purifying agent for oil-containing sewage treatment of thickened oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Preparation of prepolymer

[0019] Add N,N dimethylethanolamine (4.60g, 0.05168mol) and 0.302g catalyst KOH in a closed reactor with a thermometer and a stirrer, vacuumize, and start stirring, the reaction mixture is heated to 140 ° C, and then Propylene oxide (150.00g, 2.586mol) was added slowly, and the addition was completed after 5h. Then, the temperature of the reaction mixture was raised to 160°C, and then ethylene oxide (147.86g, 3.360mol) was added slowly, and the addition was completed after 4h, and the reaction was kept for 3h. , stop the stirring reaction to obtain the prepolymer;

[0020] 2) Preparation of reverse phase demulsification water purifier

[0021] Add the prepolymer (200.00g, 0.03419mol) and ethanol 200.00g prepared in step 1) to a closed reactor with a thermometer, a stirrer and start stirring. The reaction mixture is warmed up to 60°C, and then methyl chloride (1.71g ,0.03419mol) was added slowly, and after 1h, the reaction was kept for 3h...

Embodiment 2

[0023] 1) Preparation of prepolymer

[0024] Add N,N dimethylethanolamine (4.60g, 0.05168mol) and 0.302g catalyst KOH in a closed reactor with a thermometer and a stirrer, vacuumize, and start stirring, the reaction mixture is heated to 140 ° C, and then Propylene oxide (155.90g, 2.688mol) was added slowly, and the addition was completed after 5h. Then, the temperature of the reaction mixture was raised to 160°C, and then ethylene oxide (154.70g, 3.516mol) was slowly added, and the addition was completed after 4h, and the reaction was kept for 3h , stop the stirring reaction to obtain the prepolymer;

[0025] 2) Preparation of reverse phase demulsification water purifier

[0026] Add the prepolymer (200.00g, 0.03329mol) and ethanol 200.00g prepared in step 1) to a closed reactor with a thermometer, a stirrer and start stirring. The reaction mixture is warmed up to 60°C, and then methyl chloride (1.66g ,0.03329mol) was added slowly, and after 1 hour of addition, the heat pres...

Embodiment 3

[0028] 1) Preparation of prepolymer

[0029] Add N,N dimethylethanolamine (4.60g, 0.05168mol) and 0.302g catalyst KOH in a closed reactor with a thermometer and a stirrer, vacuumize, and start stirring, the reaction mixture is heated to 140 ° C, and then Propylene oxide (164.84g, 2.842mol) was added slowly, and the addition was completed in 5h. Then, the temperature of the reaction mixture was raised to 160°C, and then ethylene oxide (166.01g, 3.773mol) was added slowly, and the addition was completed in 4h, and the reaction was kept for 3h. , stop the stirring reaction to obtain the prepolymer;

[0030] 2) Preparation of reverse phase demulsification water purifier

[0031] Add the prepolymer (200.00g, 0.03081mol) and ethanol 200.00g prepared in step 1) to a closed reactor with a thermometer, a stirrer and start stirring. The reaction mixture is warmed up to 60°C, and then methyl chloride (1.54g ,0.03081mol) was added slowly, and after 1 hour of addition, the heat preservat...

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Abstract

The invention discloses a preparation method of a reversed-phase demulsification water purifying agent for oil-containing sewage treatment of thickened oil. The preparation method comprises the stepsthat N,N-dimethylethanolamine serves as an initiator to react with epoxy propane and ethylene oxide to prepare a precursor, and then the precursor reacts with halohydrocarbon to prepare a brown viscous liquid reversed-phase demulsification water clarifier. The reversed-phase demulsification water purifying agent obtained through the preparation method is a cationic polymer and brown viscous liquid, it is tested that the rotating viscosity is 200-280 CP at the temperature of 25 DEG C and at the rotating speed of 100 r/min, the water purifying agent can increase the demulsification and coalescence speed of emulsified oil drops at high temperature (70-90 DEG C) when used for thickened oil sewage treatment, treated waste oil does not stick to a wall, the separation effect of an inclined plateoil remover is improved, and the operation frequency for cleaning tank and removing dirt is reduced.

Description

technical field [0001] The invention relates to a heavy oil sewage treatment agent, in particular to a preparation method of a reverse-phase demulsification water purifier for treating heavy oil sewage and the reverse phase demulsification water purifier obtained by the method. Background technique [0002] At present, the water purifiers mainly used to treat heavy oil oily sewage mainly include PDADMA-AM copolymer, DMC-AM copolymer, etc., and with the rapid development of heavy oil oilfield mining industry, chemical flooding, steam flooding, etc. increase the production of heavy oil With the implementation of the measures, the heavy oil and oily sewage separated by the primary separator is difficult to treat. First, the temperature is high (70°C-90°C), emulsification is severe, and oily sewage is mostly an oil-in-water emulsion; secondly, the particles of heavy oil are suspended in water for a long time and are not easy to separate. Therefore, the performance requirements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 徐慧王哨兵李志元丁秋炜于晓微周立山滕厚开
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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