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Biological slime inhibitor and preparation method thereof

A biological slime and inhibitor technology, applied in botany equipment and methods, biocides, chemicals for biological control, etc., can solve the problems of poor compatibility of corrosion and scale inhibitors and dispersants, and low bactericidal efficiency High, few types of organic guanidine products, etc., to achieve excellent algicidal performance, excellent killing inhibition effect, and good compatibility

Active Publication Date: 2014-01-29
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although quaternary ammonium salts have good bactericidal effect, they have the disadvantages of rich foam and easy drug resistance; although isothiazolinone and organic bromine fungicides have good compatibility and excellent algicidal performance, their bactericidal efficiency is not very high. The durability of the drug effect is also poor
[0004] Polymerized organic guanidine compounds among organic guanidines have the advantages of environmental friendliness, no foam, good drug resistance, and long-lasting drug effect. In the past, they were generally used in specific fields such as medicine, pesticides, dyes, catalysts, and environmental disinfection. There are few types of organic guanidine products used in treatment, the main reason is that either the price is too high, or the bactericidal performance is insufficient, or the compatibility with other corrosion and scale inhibitors and dispersants in circulating water is not good, making it suitable for use in industrial circulating cooling water. App is restricted
[0005] Polyhexamethylene guanidine hydrochloride is a polyhexamethylene guanidine hydrochloride product that has been studied more. Ukrainian patent UA61215 uses hexamethylenediamine and guanidine hydrochloride to synthesize polyhexamethylene guanidine hydrochloride products with a molecular weight of about 8000. Its molecular weight is relatively low. Poor bactericidal performance
Although the high molecular weight product of polyhexamethyleneguanidine hydrochloride has improved bactericidal performance, it cannot be used in circulating cooling water due to its poor compatibility with anionic scale and corrosion inhibitors in industrial circulating cooling water. get application in water

Method used

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  • Biological slime inhibitor and preparation method thereof
  • Biological slime inhibitor and preparation method thereof
  • Biological slime inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of embodiment 1 polydihexamethylene triamine guanidine hydrochloride product

[0041] Preparation of poly(dihexamethylenetriamine) guanidine hydrochloride product: Add 215g (1.0mol) of dihexamethylenetriamine and guanidine hydrochloride respectively into a 1000ml four-neck flask equipped with mechanical stirring, reflux condenser, thermometer and ammonia absorption device 95.5g (1.0mol), 200g ethylene glycol, heated to 80°C, reacted for 4h; then raised the temperature to 180°C, continued to react for 2h. Then add 80 g of water, stir evenly, and cool to room temperature to obtain a poly(dihexamethylenetriamine) guanidine hydrochloride product with a solid content of 50%, coded as "Product A".

[0042] From its infrared spectrum (attached figure 1 ) analysis shows: 3346.82cm -1 and 3195.44cm -1 It is the out-of-plane deformation vibration absorption peak of N-H bond; 1642.63cm -1 It is the stretching vibration absorption peak of C=N in the guanidine gr...

Embodiment 2

[0043] The preparation of embodiment 2 biological slime inhibitors

[0044] Add poly(dihexamethylenetriamine) guanidine hydrochloride product and water to the reaction bottle in turn, after stirring well, adjust the pH value to below 6 with hydrochloric acid, add solvent, after stirring evenly, then add isothiazolinone and organic bromide, continue After stirring until completely dissolved, the biological slime inhibitor of the present invention is obtained. Using this preparation method, prepare biological slime inhibitor products N1-N6 with different components and component ratios (mass percentage) shown in Table 1:

[0045] Table 1 Composition of biological slime inhibitor products

[0046]

[0047] Note: CIT / MIT——isothiazolinone, 14% industrial product; DBNPA——2,2-dibromo-3-nitropropionamide; DBNE——2,2-dibromo-2-nitroethanol ; BNPD——bronopol; DBNPA, DBNE, and BNPD are all industrial products with a purity of ≥99%.

[0048] Embodiment 3 bactericidal performance evalu...

Embodiment 5

[0060] Embodiment 5 compatibility evaluation

[0061] Compatibility tests were carried out between the product of the present invention and common industrial circulating cooling water corrosion inhibitors and scale inhibitors and dispersants to investigate their mutual influence. The evaluation method of scale inhibition performance is "Calcium Carbonate Deposition Method for Determination of Scale Inhibition Performance of Water Treatment Agents" (GB / T16632-2008), and the evaluation method of corrosion inhibition performance is "Determination of Corrosion Inhibition Performance of Water Treatment Agents Rotating Coupon Method" ( GB / T18175-2000), the bactericidal performance evaluation method is the same as that used in Example 3. Evaluation adopts medicament description as follows: N4---the N4 fungicide in the embodiment of the present invention 3; HS-1---organophosphorus corrosion inhibitor, is 2-phosphonic acid butane 1,2,4-tricarboxylic acid (PBTC ) and zinc chloride; ATM...

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Abstract

The invention discloses a biological slime inhibitor. The biological slime inhibitor is characterized by comprising the following components by weight percent: 5-30% of poly-hexylidene triamine guanidinium chloride, 1-10% of isothiazolinone, 1-10% of organic bromide, 5-40% of methanol solvent, and the balance of water, wherein the weight-average molecular weight of the poly-hexylidene triamine guanidinium chloride is Mw=10000-20000; the molecular weight distribution D is 1.0-1.1; the isothiazolinone is a mixture of 5-chloro-2-methyl-4-isothiazolin-3-ketone and 2-methyl-4-isothiazolin-3-ketone, of which the mass ratio is (2.5-4):1; the organic bromide is one or more of 2,2-dibromo-3-nitrogen propionamide, 2-brome-2-nitro-1,3-propanediol and 2,2-dibromo-2-nitroethanol. In addition, the invention also provides a preparation method of the biological slime inhibitor. The biological slime inhibitor disclosed by the invention has an extremely efficient sterilization effect and excellent alga-killing property, and has the characteristics of being long in bacteriostatic time, free of drug resistance, free of a bubble, safe to use and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a biological slime inhibitor and a preparation method thereof. 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.), and various microorganisms and their secretions form together with sediment, scale, dust and dead microorganisms in the water body. biological slime. Biological slime works together with harmful microbial secretions to cause corrosion and damage to metal equipment under scale, thereby shortening the service life of equipment, reducing the heat exchange effect of heat exchangers, and seriously affecting production. In oilfield production, these bacteria and microorganisms will not only cause corrosion of drilling and surface oil-water treatment equipment and blockage of pipelines, but also damage oil layers, reduce pore pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/44A01P1/00A01P13/00C02F1/50A01N43/80A01N37/34A01N33/18
Inventor 姚光源张迪彦魏清王惠王素芳张磊刘玉民
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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