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Preparation technology of improved oil field composite bactericide

A fungicide and compound technology, which is applied in the compounding process of improved oil field compound fungicides, can solve the problems of environmental pollution and cost, and achieve the effects of wide application range, low lethal concentration and good compatibility

Active Publication Date: 2015-11-04
DONGYING DONGFANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned public documents all have some technical problems of one kind or another, such as problems such as environmental pollution and input costs, and have not been widely applied in oil fields.

Method used

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  • Preparation technology of improved oil field composite bactericide
  • Preparation technology of improved oil field composite bactericide
  • Preparation technology of improved oil field composite bactericide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: a kind of improved type oilfield composite fungicide mentioned in the present invention, its preparation method is:

[0032] 1) Add 5 parts of monomethylamine aqueous solution into the reaction kettle, add 8 parts of epichlorohydrin under stirring, raise the temperature to 50°C, and react at constant temperature for 4-6 hours;

[0033] 2) Continue to heat up to 70°C, add 25 parts of dodecyl tertiary amine, and react at constant temperature for 3-5 hours;

[0034] 3) Continue to heat up to 80°C, add 8 parts of benzyl chloride, and react at constant temperature for 1-3 hours;

[0035] 4) After the reaction is over, add 54 parts of water, stir evenly, and the product generated by the reaction is BC-2 multi-quaternary ammonium fungicide;

[0036] 5) Add 20 parts of BC-2 polyquaternary ammonium fungicide, 10 parts of polyhexamethyleneguanidine, 10 parts of tetrakis hydroxymethyl phosphorus sulfate, 5 parts of methylisothiazolinone, 3 parts of medical metr...

Embodiment 2

[0039] Embodiment 2: a kind of improved type oil field composite bactericide that the present invention mentions, its preparation method is:

[0040] 1) Add 7 parts of monomethylamine aqueous solution into the reaction kettle, add 10 parts of epichlorohydrin under stirring, raise the temperature to 50°C, and react at constant temperature for 5 hours;

[0041] 2) Continue to heat up to 70°C, add 30 parts of dodecyl tertiary amine, and react at constant temperature for 4 hours;

[0042] 3) Continue to heat up to 80°C, add 10 parts of benzyl chloride, and react at constant temperature for 2 hours;

[0043] 4) After the reaction is over, add 60 parts of water, stir evenly, and the product generated by the reaction is BC-2 multi-quaternary ammonium fungicide;

[0044] 5) Add 18 parts of BC-2 polyquaternary ammonium fungicide, 9 parts of polyhexamethyleneguanidine, 9 parts of tetrakis hydroxymethyl phosphorus sulfate, 4 parts of methylisothiazolinone, 2 parts of medical metronidaz...

Embodiment 3

[0047] Embodiment 3: a kind of improved type oilfield composite bactericide that the present invention mentions, its preparation method is:

[0048] 1) Add 6 parts of monomethylamine aqueous solution into the reaction kettle, add 9 parts of epichlorohydrin under stirring, raise the temperature to 50°C, and react at constant temperature for 5 hours;

[0049] 2) Continue to heat up to 70°C, add 28 parts of dodecyl tertiary amine, and react at constant temperature for 4 hours;

[0050] 3) Continue to heat up to 80°C, add 9 parts of benzyl chloride, and react at constant temperature for 2 hours;

[0051] 4) After the reaction is over, add 52 parts of water, stir evenly, and the product generated by the reaction is BC-2 multi-quaternary ammonium fungicide;

[0052] 5) Add 20 parts of BC-2 polyquaternary ammonium fungicide, 10 parts of polyhexamethyleneguanidine, 10 parts of tetrakis hydroxymethyl phosphorus sulfate, 5 parts of methylisothiazolinone, 3 parts of medical metronidazo...

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Abstract

The invention relates to a preparation technology of an improved oil field composite bactericide. The technical scheme is that the preparation technology comprises the following steps in parts by weight: (1) adding 15-20 parts of BC-2 multiple quaternary ammonium salt bactericide, 8-10 parts of polyhexamethylene guanidine , 8-10 parts of tetrakis hydroxymethyl phosphonium sulfate, 2-5 parts of methylisothiazolinone, 1-3 parts of medical metronidazole, 1-3 parts of dithiocyano-methane, 8-10 parts of glutaraldehyde, 1-2 parts of isopropanol, 1-2 parts of ethylene glycol and 0.1-0.5 part of nonylphenol polyoxyethylene ether-10 into a preparation kettle, then adding 30-40 parts of water, and sufficiently stirring; and (2) adding a sodium hydroxide aqueous solution, and adjusting the pH value to be between 7 and 9. The preparation technology has the beneficial effects that the bactericide also reaches the following requirements while solving the problem of bacterial resistance: (1) the bactericide is high in bactericidal ability and low in lethal concentration; (2) the bactericide is wide in application range and can be resistant to polymer-contained sewage; (3) the bactericide is good in water solubility, convenient to add and good in compatibility with other water treatment agents; and (4) the bactericide is low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical agents used in oilfields and their preparation, in particular to a preparation process of an improved composite bactericide for oilfields. Background technique [0002] In the oilfield production water injection system, there are a variety of harmful bacteria and microorganisms, the most common are sulfate reducing bacteria (SRB), saprophytic bacteria (TGB) and iron bacteria (IB), among which the most harmful to the oilfield gathering and transportation system is SRB. These bacteria reproduce in large quantities in the anoxic environment underground or in the equipment, which can easily cause a series of problems such as metal corrosion, formation blockage, and chemical agent deterioration. , together with the application of polymer flooding, have created favorable conditions for the reproduction of bacteria in the system, making the harm of bacteria increasingly serious. Therefore, the sew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/20A01P1/00A01N47/44A01N43/80A01N43/50A01N47/48A01N35/02A01N33/12
Inventor 毕海涛裴飞赵晴晴杜森昌付德利张宜平
Owner DONGYING DONGFANG CHEM IND
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