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Preparation method of nano silver bactericide used for recirculated cooling water

A technology of circulating cooling water and nano-silver, applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve problems such as easy agglomeration, uneven dispersion of nano-silver, and insufficient stability of nano-silver , to achieve the effect of strong antibacterial effect and high killing efficiency

Inactive Publication Date: 2016-02-03
CHINA NAT OFFSHORE OIL CORP +2
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  • Claims
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Problems solved by technology

However, this technology has the following disadvantages: 1. Nano-silver is not stable enough in water and is prone to agglomeration; 2. Nano-silver is not uniformly dispersed in water.
Although there is a silica-carrier antibacterial material that uses silica as a carrier to prepare nano-silver, it is not suitable for circulating cooling water. In order to overcome the above-mentioned technical problems, prepare a preparation plan for nano-silver bactericide

Method used

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  • Preparation method of nano silver bactericide used for recirculated cooling water
  • Preparation method of nano silver bactericide used for recirculated cooling water

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example 1

[0023] Example 1 Preparation of Nano Silver Fungicide

[0024] The preparation method of nano silver bactericide includes the following steps:

[0025] (1) Preparation of immobilized carrier: add 2.5g of chitosan to 100ml of 2% acetic acid solution with v / v of 100ml, stir well to prepare a solution of chitosan with v / v of 2.5%, add 8g of sodium hydroxide to 200ml of v / v is 60% ethyl acetate solution, fully dissolve it, prepare a v / v of 4% sodium hydroxide-ethyl acetate solution, use a medical disposable 5ml syringe with a needle type of 27G to suck 3ml of shell polymer The sugar solution, the chitosan solution is titrated into the sodium hydroxide-ethyl acetate solution through a syringe needle, that is, the chitosan ball is made as an immobilized carrier, and then repeatedly washed with deionized water until no sodium hydroxide remains. Store at 4℃ for later use;

[0026] (2) Cross-linking activated immobilized carrier: select 2g of immobilized carrier chitosan balls, add 50ml of ...

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Abstract

The present invention discloses a preparation method of a nano silver bactericide used for recirculated cooling water, and according to the method, chitosan and chitosan-based polymer are mainly used as carriers for immobilizing nanosilver. The preparation method comprises the following steps: (1) preparation of the immobilization carriers; (2) crosslinking activation of the immobilization carriers; (3) preparation of a nano-silver disinfecting solution; and (4) nano-silver particle immobilization for finally obtaining the immobilized nano silver bactericide. Compared with conventional bactericides, the nano silver bactericide has the characteristics of broad spectrum, high effect, no toxicity and strong antibacterial effect, and the like, is suitable for industrial recirculated cooling water systems, oil field injection water and wastewater treatment, has high kill efficiency on common heterotrophic bacteria, sulfate salt reducing bacteria and iron bacteria and other bacteria and algae, and has excellent effect of prevention of the formation of biofouling.

Description

Technical field [0001] The invention relates to a circulating cooling water treatment agent, in particular to an environmentally friendly bactericide that can effectively kill bacteria in a circulating cooling water system. Background technique [0002] In industrial circulating cooling water and oilfield reinjection water systems, there are a large number of various microorganisms (algae, bacteria, fungi, etc.). Various microorganisms and their secretions form together with the sediment, scale, dust and microbial dead bodies in the water. Biological slime. Biological sludge and harmful microbial secretions work together to cause corrosion and damage to metal equipment, thereby shortening the service life of the equipment, reducing the heat exchange effect of the heat exchanger, and seriously affecting production. In oilfield exploitation, these bacteria and microorganisms will not only cause corrosion and pipeline blockage of drilling and surface oil and water treatment equipme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00C02F1/50A01N43/16A01N35/02
Inventor 王惠张迪彦姚光源魏清王宁潘月秋
Owner CHINA NAT OFFSHORE OIL CORP
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