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Block polyether oilfield sewage treatment agent taking N'N-dimethyl ethanolamine as initiator and preparation method thereof

A technology of dimethylethanolamine and oilfield sewage, which is applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of affecting the normal production of oilfields, affecting the efficiency of sewage treatment, and increasing the production cost of oilfields. And other issues

Inactive Publication Date: 2014-04-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, cationic polymer is a common treatment agent for treating this kind of sewage. The mechanism is mainly that the positively charged cationic polymer and negatively charged oil droplets (the negative charge of the oil droplet is provided by HPAM adsorbed on the oil-water interface) through the charge Neutralization achieves the flocculation of oil droplets, but at this time it will lead to the generation of a large amount of viscous sludge (blocking sewage treatment equipment, affecting the efficiency of sewage treatment, which will affect the normal production of oil fields
In addition, a large amount of oil sludge also needs to be collected and reprocessed, which increases the production cost of the oil field

Method used

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  • Block polyether oilfield sewage treatment agent taking N'N-dimethyl ethanolamine as initiator and preparation method thereof
  • Block polyether oilfield sewage treatment agent taking N'N-dimethyl ethanolamine as initiator and preparation method thereof
  • Block polyether oilfield sewage treatment agent taking N'N-dimethyl ethanolamine as initiator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1N'N-dimethylethanolamine is the preparation of the polypropylene oxide oil head of initiator

[0027] Add 10g of N'N-dimethylethanolamine and 2.4g of potassium hydroxide to the high-temperature and high-pressure reactor, and seal the reactor. Before heating up, use nitrogen to blow and replace, then use a vacuum pump to evacuate, repeat twice, then start stirring and raise the temperature, stop heating when the temperature rises to 120°C, open the feed valve, add 790g of propylene oxide dropwise, and control the reaction The temperature does not exceed 140°C and the pressure is controlled below 0.4MPa. After the reaction of the materials is completed, the pressure drops and then reacts for 30 minutes to reduce the pressure to 0MPa. Finally, cool down and open the kettle to obtain N'N-dimethylethanolamine as the initiator Polypropylene oxide oil head, marked as DMEA-79.

Embodiment 2

[0028] Embodiment 2N'N-dimethylethanolamine is that initiator is the preparation of the polypropylene oxide oil head of initiator

[0029] Add 10g of N'N-dimethylethanolamine as a starter and 1.16g of potassium hydroxide to a high-temperature and high-pressure reactor, and seal the reactor. Before heating up, use nitrogen to blow and replace, then use a vacuum pump to evacuate, repeat twice, then start stirring and raise the temperature, stop heating when the temperature rises to 120°C, open the feed valve, add 570g of propylene oxide dropwise, and control the reaction The temperature does not exceed 140°C and the pressure is controlled below 0.4MPa. After the reaction of the materials is completed, the pressure drops and then reacts for 30 minutes to reduce the pressure to 0MPa. Finally, cool down and open the kettle to obtain N'N-dimethylethanolamine as the initiator Polypropylene oxide oil head as starter, marked as DMEA-57.

Embodiment 3

[0031] The method of Example 1 is adopted, but the amount of propylene oxide is changed to 340g, 450g, and 990g respectively, and the obtained polypropylene oxide oil heads with N'N-dimethylethanolamine as the initiator are respectively marked as DMEA- 34. DMEA-45, DMEA-99.

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Abstract

The invention discloses a block polyether oilfield sewage treatment agent taking N'N-dimethyl ethanolamine as an initiator and a preparation method thereof, and relates to the technical field of preparation of oilfield oily sewage treatment agents. The block polyether oilfield sewage treatment agent taking the N'N-dimethyl ethanolamine as the initiator is obtained in a way that with N'N-dimethyl ethanolamine as the initiator, epoxypropane and ethylene oxide generate ring opening polymerization under the conditions of high temperature and high pressure. The treatment agent disclosed by the invention has good oil-water separation effect on polymer-containing sewage produced after oilfield polymer flooding.

Description

technical field [0001] The invention relates to the technical field of preparation of oily sewage treatment agents, in particular to a block polyether oilfield sewage treatment agent using N'N-dimethylethanolamine as a starting agent and a preparation method thereof. Background technique [0002] In recent years, polymer flooding has been widely used in many oil fields, and correspondingly produced a large amount of polymer-containing sewage. Polymerized sewage contains a large amount of anionic, partially hydrolyzed polyacrylamide (HPAM), and the oil content is usually 100-10000mg / L, which belongs to the low oil-water ratio O / W emulsion. Both on-site production feedback and laboratory research indicate that the presence of HPAM in water will increase the difficulty of sewage treatment. At present, cationic polymer is a common treatment agent for treating this kind of sewage. The mechanism is mainly that the positively charged cationic polymer and negatively charged oil dro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C02F1/00
Inventor 段明方申文龙卫红靖波张健
Owner SOUTHWEST PETROLEUM UNIV
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