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Biological slime stripping agent for water treatment, and preparation method thereof

A biological slime and stripping agent technology, applied in the directions of botanical equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of high cost and high price, and achieve safe use, efficient sterilization, Enhanced effect of sterilization and slime peeling performance

Inactive Publication Date: 2014-02-26
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Isothiazolinone and organic bromine fungicides both have excellent bactericidal and algae killing effects, and also have a certain slime stripping effect, but because they are more expensive, the cost of using them alone is relatively high

Method used

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  • Biological slime stripping agent for water treatment, and preparation method thereof
  • Biological slime stripping agent for water treatment, and preparation method thereof
  • Biological slime stripping agent for water treatment, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 10

[0032] The preparation of embodiment 1 dodecyl polyhexamethylene guanidine hydrochloride

[0033] In a 1000ml four-necked flask equipped with mechanical stirring, reflux condenser, thermometer and ammonia absorbing device, add 117.2g (99%, 1.0mol) of hexamethylenediamine and 60g of ethylene glycol. Then 20.68 g of 1-chlorododecane (99%, 0.10 mol) was added dropwise at room temperature. After the addition, the temperature was raised to 55 ° C, and the reaction was kept for 3 hours. Then 96.50 g of guanidine hydrochloride (99%, 1.0 mol) was added, and the temperature was raised to 80°C, react for 2h; then raise the temperature to 160°C, continue to react for 6h. Finally, 140 g of water was added and stirred evenly to obtain a dodecyl polyhexamethylene guanidine hydrochloride product (APHG) with a content of 50%.

[0034] From its infrared spectrum (attached figure 2 ) analysis shows: 3271.68cm -1 and 3171.19cm -1 It is the out-of-plane deformation vibration absorption peak ...

Embodiment 2

[0035] The preparation of embodiment 2 biological slime stripping agent

[0036] At room temperature, add alkyl polyhexamethylene guanidine hydrochloride and water to the reaction flask in turn, adjust the pH to ≤6 with hydrochloric acid, then add solvent, stir evenly, add isothiazolinone and organic bromide, stir to completely dissolve Finally, the water treatment biological slime stripping agent of the present invention is obtained. According to the different components and composition ratios (mass percentage) shown in Table 1 below, the preparation method is used to prepare, and the product numbers of the prepared biological slime stripping agents are A1-A6 respectively:

[0037] Table 1 The composition ratio of different biological slime stripping agents

[0038]

[0039]Note: APHG——the alkyl polyhexamethylene guanidine hydrochloride product (50%) synthesized in Example 1; CIT / MIT——isothiazolinone, 14% industrial product; DBNPA——2,2-dibromo -3-Nitropropionamide; DBNE—...

Embodiment 4

[0047] Embodiment 4 Biological slime stripping performance test

[0048] The biological slime stripping performance test of the present invention adopts the following operation method: (1) Add bacteria and nutrients to the culture tank to cultivate the bacteria and algae; (2) After the cultivation is completed, connect the stainless steel test tube (the length of the tube is 25cm), Dynamic circulation, so that the stainless steel test tube breeds slime to the specified requirements, take out the test tube, dry at 40°C for 2 hours, and weigh; (3) Reconnect the weighed test tube to the test box, add the reagent, run for 24 hours, and then Take out the test tube, dry it at 40°C for 2h, and weigh it. The whole dynamic control parameters are: pH value=8.0~8.5, temperature 32±1℃, flow rate 1.0m / h. The test results are shown in Table 3:

[0049] It can be seen from the test data in Table 3 that under the experimental concentration conditions (the use cost of each agent is close at ...

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Abstract

The present invention discloses a biological slime stripping agent for a water treatment. The biological slime stripping agent is characterized by comprising, by weight, 5-30% of alkyl polyhexamethylene guanidine hydrochloride, 1-10% of isothiazolinone, 1-10% of organic bromine, 5-40% of a solvent, and the balance of water, wherein the alkyl polyhexamethylene guanidine hydrochloride structure is represented by a formula (I), m is 20-90, n is 9-17, the weight average molecular weight Mw is 12000-20000, the molecular weight distribution D is 1.0-1.2, the isothiazolinone is a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, the organic bromine is one or a plurality of materials selected from 2,2-dibromo-3-nitrilopropionamide, 2-bromo-2-nitro-1,3-propylene glycol, and 2,2-dibromo-2-nitroethanol, and the solvent is an alcohol solvent.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a biological slime stripping agent for water treatment and a preparation method thereof. Background technique [0002] During the recycling process of industrial circulating cooling water, bacteria gather to form colonies and attach to the metal wall. The microorganisms themselves not only secrete mucus to form sediments, but also attach to suspended impurities in the water phase to form slime clusters. Oxygen concentration batteries are formed around and below the slime mass, causing severe localized corrosion. In addition to accelerating under-deposit corrosion, biological slime also directly constitutes corrosion in the secretions produced by some bacteria during the metabolic process. With the popularization and application of high concentration ratio technology, problems such as corrosion, blockage, and heat transfer effects caused by the biological slime formed by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/44A01P1/00A01P13/00C11D1/50C02F1/50C02F5/12C11D3/34C11D3/32C11D3/26A01N43/80A01N37/34A01N33/18A01N37/30
Inventor 姚光源魏清王惠张迪彦王素芳张磊刘玉民
Owner CHINA NAT OFFSHORE OIL CORP
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