Compositing and compounding process for bactericide for oilfield wastewater reinjection treatment

An oilfield sewage and bactericide technology, which is applied in the fields of sterilization/microdynamic water/sewage treatment, mining wastewater treatment, biocide, etc. It can solve the problems of bacterial drug resistance, adapt to a wide temperature range and lower production costs

Inactive Publication Date: 2015-07-22
DONGYING DONGFANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But above-mentioned open document all has some technical problems of one kind or another, and the consumption of oxidizing type fungicide is big, and has heavier corrosivity, is difficult to popularize and apply in land oil field; However, a single component is likely to cause bacteria to develop drug resistance; heterocyclic compounds have good bactericidal effect, but their water solubility is poor, so they can only be used in small quantities; aldehyde compounds occupy a certain position in oilfield sewage and reinjection water fungicides, but they are less harmful to the environment. Large, and it is difficult to use in large-scale oil fields at present

Method used

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  • Compositing and compounding process for bactericide for oilfield wastewater reinjection treatment

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: the oilfield sewage reinjection treatment bactericide that the present invention mentions, its synthesis and compounding process are:

[0022] 1) Add 600kg of hexamethylenediamine to the reaction kettle, raise the temperature while stirring, and when the temperature rises to 50°C, add 500kg of aminoformamidine hydrochloride;

[0023] 2) Continue to raise the temperature. When the temperature rises to 100°C, stop heating and react at a constant temperature for 3 hours. While maintaining the temperature, add 10kg of hydrochloric acid as a catalyst dropwise;

[0024] 3) Continue to heat up. When the temperature rises to 120°C, stop heating and react at constant temperature for 12 hours;

[0025] 4) After the reaction is completed, add 1400kg of water and 40kg of hydrochloric acid, the concentration of hydrochloric acid is 30-31% by weight; stir evenly, and the product generated by the reaction is polyhexamethyleneguanidine hydrochloride;

[0026] 5) Add 80...

Embodiment 2

[0029] Embodiment 2: Bactericide for oil field sewage reinjection treatment, its synthesis and compounding process are:

[0030] 1) Add 400kg of hexamethylenediamine to the reaction kettle, heat up under stirring, and when the temperature rises to 50°C, add 200kg of aminoformamidine hydrochloride;

[0031] 2) Continue to raise the temperature. When the temperature rises to 80°C, stop heating and react at a constant temperature for 3 hours. While maintaining the temperature, add 4kg of hydrochloric acid as a catalyst dropwise;

[0032] 3) Continue to heat up. When the temperature rises to 110°C, stop heating and react at constant temperature for 10 hours;

[0033] 4) After the reaction is completed, add 900kg of water and 20kg of hydrochloric acid, the concentration of hydrochloric acid is 30-31% by weight; stir evenly, and the product generated by the reaction is polyhexamethyleneguanidine hydrochloride;

[0034] 5) Add 500kg polyhexamethyleneguanidine hydrochloride to the pr...

Embodiment 3

[0037] Embodiment 3: Bactericide for oil field sewage reinjection treatment, its synthesis and compounding process are:

[0038] 1) Add 500kg of hexamethylenediamine to the reaction kettle, raise the temperature while stirring, and when the temperature rises to 50°C, add 400kg of aminoformamidine hydrochloride;

[0039] 2) Continue to raise the temperature. When the temperature rises to 100°C, stop heating and react at a constant temperature for 3 hours. While maintaining the temperature, add 8kg of hydrochloric acid as a catalyst dropwise;

[0040] 3) Continue to heat up. When the temperature rises to 120°C, stop heating and react at constant temperature for 12 hours;

[0041] 4) After the reaction is completed, add 1200kg of water and 30kg of hydrochloric acid, the concentration of hydrochloric acid is 30-31% by weight; stir evenly, and the product generated by the reaction is polyhexamethyleneguanidine hydrochloride;

[0042] 5) Add 700kg polyhexamethyleneguanidine hydroch...

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Abstract

The invention relates to a compositing and compounding process for a bactericide for oilfield wastewater reinjection treatment. The compositing and compounding process comprises steps as follows: (1), hexamethylenediamine is added to a reaction kettle, the temperature is raised in a stirring state, and iminourea hydrochloride is added; (2), the temperature is raised continuously, a thermostatic reaction is performed, and meanwhile, hydrochloric acid is added dropwise to serve as a catalyst; (3), the temperature is raised continuously, and a thermostatic reaction is performed; (4), after the reaction is finished, water and hydrochloric acid are added and uniformly stirred, and a product generated in the reaction is polyhexamethyleneguanidine chloride; (5), polyhexamethyleneguanidine chloride, tetrakis hydroxymethyl phosphonium sulfate, a biquaternary ammonium salt bactericide, nonylphenol polyoxyethylene ether-10, methylisothiazolinone and water are added to a preparation kettle and fully stirred; (6), a sodium hydroxide solution is added, and a pH (potential of hydrogen) value is adjusted to range from 7 to 9. The process has the beneficial effects that the character is stable; adding is simple; various agents are compounded, so that the problem of bacterial resistance is solved; the purpose of quickly killing bacteria in waste through the bactericide with lower concentration is achieved.

Description

technical field [0001] The invention relates to a preparation process of an environment-friendly bactericide for reinjection treatment of oilfield sewage, in particular to a synthesis and compounding process of a bactericide for reinjection treatment of oilfield sewage. Background technique [0002] In the secondary recovery of oilfields, a large amount of reinjection water is required, because the reinjection water generally contains sulfate reducing bacteria (SRB), saprophytic bacteria (TGB) and iron bacteria, which can easily cause a series of metal corrosion, formation blockage, chemical agent deterioration, etc. Bacterial microorganisms that are not conducive to water injection oil recovery. Therefore, it is generally necessary to add fungicides for pretreatment before sewage reinjection. At present, there are mainly four types of fungicides commonly used in oil fields: oxidized, quaternary ammonium salts, heterocyclic compounds and aldehydes. [0003] Chinese Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/20A01N25/30A01P1/00C02F1/50A01N33/12C02F103/10
Inventor 付德利张宜平赵晴晴杜森昌毕海涛裴飞
Owner DONGYING DONGFANG CHEM IND
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