Preparation method of gemini bis-quaternary ammonium salt bactericide

A technology of diquaternary ammonium salts and fungicides, which is applied in the field of preparation of gemini diquaternary ammonium salts fungicides, can solve the problems of short effective duration of medicines, drug resistance of microorganisms, and large dosage, so as to improve the effective use efficiency, Good dissolution and cleaning effect, long effective period

Inactive Publication Date: 2014-07-23
SHENGLI OILFIELD SHENGLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term use of this type of bactericide in the oilfield water injection system has shown many shortcomings, mainly manifested in the short effective duration of the agent, easy resistance of microorganisms to it, large dosage, high cost, and foaming when used. Many, difficult to remove and other shortcomings

Method used

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  • Preparation method of gemini bis-quaternary ammonium salt bactericide
  • Preparation method of gemini bis-quaternary ammonium salt bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 1000g of long-chain brominated hydrocarbons and 200g of isopropanol into a reaction kettle with a stirrer and double jacket, stir and heat, and when the temperature reaches 80°C, add 200g of diamine and 50g of isopropanol within 30 minutes The mixture was reacted at a constant temperature for 20 minutes, and then 150 g of isopropanol was added dropwise within 30 minutes, and the reaction was completed at a constant temperature for 6 hours.

Embodiment 2

[0020] Add 1000g of long-chain brominated hydrocarbons and 100g of isopropanol into a reactor with a stirrer and double jacket, stir, and when the temperature reaches 90°C, add 200g of diamine and 50g of isopropanol in 30 minutes, then After 40 minutes of constant temperature reaction, 50 g of isopropanol was added dropwise within 30 minutes. After 10 hours of constant temperature reaction, the target product was analyzed by 1H NMR.

Embodiment 3

[0022] The difference between this embodiment and Embodiment 2 is that the isopropanol solvent is changed to a mixture of isopropanol and ethyl acetate in a mass ratio of 2:1, and other process conditions and steps are the same as in Example 2.

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Abstract

The invention discloses a preparation method of a gemini bis-quaternary ammonium salt bactericide. The preparation method comprises the following steps: dripping a diamine and solvent mixture into a mixed solution containing long-chain bromo-hydrocarbon and a solvent, controlling the dripping temperature to be 50 to 90 DEG C, reacting for 20-40 minutes at a constant temperature, then adding the solvent, reacting for 6-10 hours at the constant temperature to end the reaction, discharging and analyzing, wherein the mass ratio of the long-chain bromo-hydrocarbon to the solvent is 10:(2-5). The bactericide disclosed by the invention has the advantages of having a good bactericidal performance on microorganisms (taking sulfate reducing bacteria as a main component and taking saprophytic bacteria and iron bacterium as auxiliary materials) in sewage of an oil field, lowering the sewage treatment cost of the oil field, simultaneously having a dual-sterilization mechanism and solving the problem of drug resistance to the microorganisms.

Description

technical field [0001] The invention relates to a preparation method of a gemini diquaternary ammonium salt fungicide. Background technique [0002] In the process of oilfield production, water injection supplements formation energy and maintains formation pressure is one of the main measures to stabilize production in oilfields at home and abroad. With the progress of water injection, in addition to physical damage and chemical damage, biological damage has become more and more prominent in formation damage caused by water injection. Oilfield injection water, no matter whether it is fresh water or produced water reinjection, contains bacteria, and the proliferation of bacteria will cause corrosion to water injection equipment and pipelines. When the amount of bacteria in the injected water is large, the bacteria will grow and multiply rapidly in the low-temperature zone around the wellbore, and the corrosion products, bacterial cells and metabolites will block the pore sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/00A01P1/00A01N33/12
Inventor 冯玉军张胜王碧清唐重莉束松旷刘冬冬
Owner SHENGLI OILFIELD SHENGLI CHEM
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