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A composition for corrosion inhibition, scale inhibition and sterilization and its application
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A technology of corrosion inhibition, scale inhibition and composition, which is applied in the field of corrosion inhibition, scale inhibition and sterilization composition, which can solve the problems of low dosage, difficulty in having good corrosion inhibition, scale inhibition and sterilization performance at the same time, and achieve optimal mitigation Eclipse effect
Active Publication Date: 2020-05-12
CHINA PETROLEUM & CHEM CORP +1
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[0006] The purpose of the present invention is to overcome the shortcomings of the existing water treatment chemicals that are difficult to have good corrosion inhibition, scale inhibition and bactericidal performance at the same time, and to provide a kind of water treatment agent with better corrosion inhibition, scale inhibition and bactericidal performance, and a lower dosage when used. water treatment chemicals
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Embodiment 1-4
[0050] Dosing chemicals into the test water as shown in Table 3 and conducting scale inhibition, corrosion inhibition and bactericidal performance tests, the specific test methods are as follows. The *mg / L recorded in Table 3 represents the effective (dry basis) content, and the tin salt is calculated according to tin ions.
[0051] Evaluation of Scale Inhibition Performance
[0052] Add chemicals to the test water, evaporate and concentrate in a constant temperature water bath at 80±1°C until the concentration is 5 times, and take samples to analyze the remaining Ca in the water 2+ At the same time, make a blank sample and calculate the scale inhibition rate. The calculation formula of scale inhibition rate is: scale inhibition rate = (C-C 0 ) / (nC 1 -C 0 )×100%, where,
[0053] C: remaining Ca in water 2+ Concentration (mg / L)
[0054] C 0 : Ca of the blank 2+ Concentration (mg / L)
[0055] C 1 : Ca in raw water 2+ Concentration (mg / L)
[0056] n: Concentration mul...
Embodiment 5
[0074] In order to simulate the scene, a dynamic simulation test was carried out. The dynamic simulation test method is carried out according to the chemical industry standard HG / T2160-91 of the People's Republic of China, and the control parameters are as follows.
[0075] Water quality: test raw water 1, see Table 1.
[0076] Concentration factor: Tower A 4.0±0.2 Tower B 4.0±0.2
[0077] pH: Tower A controls 8.0±0.2 Tower B controls 8.0±0.2
[0078] Velocity: 1.0m / s
[0079] Potion:
[0080] Tower A: Weigh 4g of PBTCA with an effective content of 50% by weight, 8g of HEDP with an effective content of 50% by weight, 3g of benzotriazole, and 26.7g of copolymer 1 with a solid content of 30% by weight, and dissolve them in 56.8g of water , and finally add 1.5g tin tetrachloride pentahydrate, make it fully dissolved, shake well, and obtain the required 100g preparation.
[0081] When the prepared agent is added to water at a concentration of 100 mg / L, the effective concentra...
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Abstract
The invention relates to the field of water treatment and discloses a composition for corrosion and scale inhibition and sterilization and an application thereof. The composition contains a water-soluble tin salt, an organic phosphonic acid, a nitrogen-containing heterocyclic compound and a copolymer, wherein the copolymer comprises a structural unit provided by 2-acrylamide-2-methyl propane sulfonic acid; on the basis of the gross of the copolymer, the weight percent of the structural unit provided by the 2-acrylamide-2-methyl propane sulfonic acid is greater than or equal to 20%, wherein the weight ratio of the water-soluble tin salt to the organic phosphonic acid to the nitrogen-containing heterocyclic compound to the copolymer is 1:(1-20):(1-12):(1-20); and the weight of the water-soluble tin salt is calculated according to tin ions. The composition for corrosion and scale inhibition and sterilization has relatively good corrosion inhibition property, scale inhibition property and sterilization property and is relatively low in dosage in use.
Description
technical field [0001] The invention relates to the field of water treatment, in particular to a composition for corrosion inhibition, scale inhibition and sterilization and its application in the treatment of circulating cooling water. Background technique [0002] Long-term operation of circulating cooling water will cause problems of corrosion, scaling and bacterial growth, so corrosion inhibitors, scale inhibitors and bactericides need to be added separately. Research on non-toxic, highly efficient multifunctional water treatment agents is the direction of pharmaceutical research and development. Most petrochemical enterprises use composite corrosion and scale inhibitors. The more widely used formulas include phosphorus-based (composed of polyphosphate, polycarboxylic acid and copolymer, zinc salt, etc.), all-organic system (composed of organic phosphonic acid, polycarboxylic acid and copolymer, azole compounds with or without Zinc salt composition), etc. In the proce...
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Application Information
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