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Branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and preparation method thereof

A technology of quaternary ammonium salt and demulsifier is applied in the field of branched low-temperature and high-efficiency quaternary ammonium salt modified starch demulsifier and its preparation field, which can solve the problems of high production cost and unfavorable industrialization, and achieves low production cost and raw material utilization rate. High and demulsification efficiency

Active Publication Date: 2017-09-22
WEIHAI CY DENDRIMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two patents have the characteristics of using catalysts and high production costs, which are not conducive to the realization of industrialization

Method used

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  • Branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and preparation method thereof
  • Branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and preparation method thereof
  • Branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 1.62g soluble starch (0.01mol according to monomer), 3.37g (0.04mol) formaldehyde aqueous solution (37%) and 5.46g (0.04mol) dimethylamine aqueous solution (33%) to a 100mL round bottom flask , the temperature was raised to 30°C, the starch was dissolved after 30 minutes of reaction, and the reaction was continued at this temperature for 10 hours to obtain a light yellow solution. 3.7g (0.04mol) of epichlorohydrin was slowly added dropwise to the above solution, the reaction temperature was controlled at 50°C, and the reaction was kept at this temperature for 5h to obtain a light yellow solution. Take 2.92g (0.04mol) of n-butylamine and slowly add it dropwise to the above solution, the reaction temperature is controlled at 40°C, and the reaction is kept at this temperature for 6h, and adjusted by adding water to obtain a light yellow solution with a solid content of 50%.

Embodiment 2

[0055] 1.62g wheat starch (0.01mol according to monomer calculation), 0.9g (0.01mol) paraformaldehyde and 6.65g (0.03mol) diethylamine aqueous solution (33%) were successively added in a 100mL round-bottomed flask, and the temperature was raised to After reacting for 30 minutes at 90°C, the starch dissolved, and continued to react at this temperature for 1 hour to obtain a light yellow solution. Take 4.11 g (0.03 mol) of epibromohydrin and slowly add it dropwise to the above solution, the reaction temperature is raised to 100° C., and the reaction is kept at this temperature for 1 h to obtain a light yellow solution. Take 3.88g (0.03mol) of n-octylamine and slowly add it dropwise to the above solution, the reaction temperature is controlled at 90°C, and the reaction is kept at this temperature for 1h, and adjusted by adding water to obtain a light yellow solution with a solid content of 50%.

Embodiment 3

[0057] Add 1.62g cornstarch, 0.20g (3.3mmol, can generate formaldehyde 0.01mol) paraformaldehyde and 3.06g (0.01mol) dipropylamine aqueous solution (33%) into a 100mL round bottom flask successively, heat up to 55°C, After reacting for 30 minutes, the starch dissolved, and continued to react at this temperature for 2 hours to obtain a light yellow solution. Take 0.92g (0.01mol) of epichlorohydrin and slowly add it dropwise to the above solution, the reaction temperature is raised to 95°C, and the reaction is kept at this temperature for 2h to obtain a light yellow solution. Take 2.69g (0.01mol) of n-octadecylamine and slowly add it dropwise to the above solution, the reaction temperature is controlled at 60°C, and the reaction is kept at this temperature for 2.5h, and water is added to adjust to obtain a milky white emulsion with a solid content of 50%.

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Abstract

The invention relates to the technical field of oilfield sewage disposal demulsification flocculation, in particular to a branched low-temperature high-efficiency quaternary ammonium salt modified starch demulsifying agent and a preparation method thereof. The demulsifying agent has a general molecular formula as described in the description, and the preparation method comprises the following steps: (1) adding starch, aldehyde or urea, and dialkyl amine into a reactor one after another to carry out tertiary amine end capping grafting reaction; (2) adding halogeneated epoxyalkane in a reaction product to carry out quaternization grafting reaction; (3) adding a ring-opening reagent in the reaction product to carry out ring-opening grafting reaction to obtain the demulsifying agent. According to the demulsifying agent, under the condition of not using a catalyst, the starch which is low in price, rich in raw materials and can be regenerated is taken as a raw material, the production cost is low, the industrial production is conducive to being realized, the prepared demulsifying agent is characterized in that the dosage is less and the demulsifying efficiency is high, and has a very good demulsifying effect for sewage generated by the tertiary oil recovery technology. Water is the only by-product, the utilization rate of raw materials is high, and the discharge of three wastes does not exist.

Description

technical field [0001] The invention belongs to the technical field of demulsification and flocculation for oilfield sewage treatment, and in particular relates to a branched low-temperature and high-efficiency quaternary ammonium salt modified starch demulsifier and a preparation method thereof. Background technique [0002] Starch-based chemicals are low-toxic, easily degradable, environmentally friendly products with abundant and renewable synthetic raw materials. closely related fields. Starch macromolecules have a hydrophilic semi-rigid skeleton. Under the action of different catalysts, hydrophilic or lipophilic groups can be introduced on the surface through graft copolymerization, quaternary ammonium salt modification, etc., so as to obtain different High-performance functional macromolecules have application value in various fields. [0003] With the wide application of three-element flooding oil recovery technology, the oil production fluid is adsorbed on the oil-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00B01D17/05
Inventor 毕研刚贾欣茹李武松刘聪聪
Owner WEIHAI CY DENDRIMER TECH
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