CN105018940A - Bactericidal water soluble copper corrosion inhibitor - Google Patents
Bactericidal water soluble copper corrosion inhibitor Download PDFInfo
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- CN105018940A CN105018940A CN201510395092.2A CN201510395092A CN105018940A CN 105018940 A CN105018940 A CN 105018940A CN 201510395092 A CN201510395092 A CN 201510395092A CN 105018940 A CN105018940 A CN 105018940A
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- copper corrosion
- water soluble
- corrosion inhibitor
- soluble copper
- sodium bromide
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Abstract
The invention provides a preparation method of a bactericidal water soluble copper corrosion inhibitor, and belongs to the technical field of chemical engineering. The bactericidal water soluble copper corrosion inhibitor comprises the following components in percentage by weight: 15-30% of benzotriazole, 10-20% of sodium hydroxide, 8-10% of sodium bromide water solution, 15-30% of polymaleic anhydride, 5-10% of zinc salt, and the balance of water. The bactericidal water soluble copper corrosion inhibitor is low in production cost, high in stability, excellent in copper corrosion inhibition and improved in sterilization performance. All the components of the bactericidal water soluble copper corrosion inhibitor are excellent in intermiscibility, cooperativity and expandability, and can replace traditional compound and single copper corrosion inhibitors; the bactericidal water soluble copper corrosion inhibitor is green in formula and preparation method; the adopted compound materials contain no phosphorus without causing the water eutrophication; the drainage cannot cause the environmental pollution; the production process is simple; and the operation is more convenient.
Description
Technical field
The present invention relates to a kind of water soluble copper corrosion inhibitor, particularly a kind of bactericidal properties copper inhibitor, belongs to chemical technology field.
Background technology
Metallic copper is owing to having stable chemical nature, and good heat conductivity, the advantages such as mechanical property is excellent, corrosion-resistant are widely used, but in long-term use procedure, its etching problem also reveals gradually.The stopping production caused due to copper corrosion or product leakage and pollution problem, cause our life and production and bring harm and loss, therefore must protect it.
The method solving copper inhibition problem has a lot, low and be easy to control to add inhibiter cost, is thus widely used.The exploitation of organic inhibiter comparatively early, is developed so far existing several large class, and wherein especially better with the heterogeneous ring compound effect containing elements such as oxygen, nitrogen, sulphur, and conventional has azole, imidazoles material etc.At present, the copper inhibitor industrially applied mainly contains: based on containing the nitrogen azoles type of N compound, amine type and pyridine type inhibiter, as benzotriazole, hexamethylenetetramine etc.; Based on the thiazole type inhibiter containing S, N compound, as 2-mercaptobenzothiazole (MBT) etc.; Based on the amine aldehyde condensate type inhibiter containing N, O compound.But the concentration of BTA is generally 20mg/L in commercially available copper inhibitor, large usage quantity, use cost is higher, poorly water-soluble, and be used alone wherein a kind of inhibiter time, all have weak point.
Based on the problems referred to above, current scientific research personnel is setting about studying the lower inhibiter of new price and is replacing, and also has researchist to attempt carrying out composite with several inhibiter, utilizes the synergistic effect between inhibiter to reduce the consumption of inhibiter, improve inhibition efficiency, reduce costs.Moreover, while composite, use additive, while making to have corrosion inhibition, expand out other performance.This kind of multi-functional copper inhibitor can add new vitality to domestic market undoubtedly, and its market requirement will have development prospect.
Summary of the invention
The object of the present invention is to provide a kind of preparation method with the complex copper inhibiter that technical process is simple, production cost is low, steady quality, complete function, copper inhibition efficiency are high.
Object of the present invention realizes by the following technical solutions:
A preparation method for bactericidal properties water soluble copper corrosion inhibitor, its ingredients by weight per-cent consists of:
Benzotriazole 15 ~ 30%
Sodium hydroxide 10 ~ 20%
Aqueous sodium bromide 8 ~ 10%
Polymaleic anhydride 15 ~ 30%
Zinc salt 5 ~ 10%
The water of surplus
Preferred further, the molecular-weight average of described polymaleic anhydride is greater than 5500.
Preferred further, described aqueous sodium bromide mass concentration is 5 ~ 10%.
Preferred further, the step of its preparation method is:
(1) zinc salt and water being added stirring at normal temperature in reactor makes zinc salt fully dissolve, and then adds polymaleic anhydride and stirs 20 ~ 30 minutes;
(2) under normal temperature state, sodium hydroxide is dissolved, when solution temperature is down to greenhouse, adds benzotriazole after it dissolves completely, adjust pH to be 7 ~ 9, this solution is joined in polymaleic acid-zinc salt reactor and stir 30 ~ 40 minutes;
(3) with water, Sodium Bromide is fully dissolved, form homogeneous sodium bromide solution;
(4) finally adding aqueous sodium bromide in a kettle. stirs after 10 ~ 20 minutes, namely obtains product after liquid to be mixed is even.
The invention has the beneficial effects as follows:
(1) the present invention has scale inhibition, inhibition, bactericidal properties function simultaneously, and each component of the present invention has good intermiscibility, synergetic property and complementarity, alternative existing simple function copper inhibitor.
(2) formula of the present invention and the equal greenization of preparation method.Not phosphorous in the composite raw material that the present invention adopts, can not cause body eutrophication, draining can not to environment; And preparation method's simple possible of the present invention, be cleaning procedure, discharge without three industrial wastes.
(3) component sodium hydroxide of the present invention is as the solvent of benzotriazole, and sodium hydroxide is as highly basic, and this inhibiter pH can be regulated again to be weakly alkaline, environmental protection, production cost reduces greatly, and simple to operate, is easy to control.
(4) the composite upper macromolecule polymaleic anhydride of the present invention, mainly plays scale-inhibiting properties, avoids underdeposit corrosion as far as possible, improves corrosion inhibition.Polymaleic anhydride has high efficiency dispersion, with Ca on the active growth point that they can be adsorbed onto calcium carbonate crystal
2+chelating, inhibits lattice to grow up to certain direction, and lattice is distorted childlike, carboxyl (-COOH) quantity is more, and scale inhibition effect is better.Add zinc salt can with the polymaleic anhydride complex reaction of high molecular, make solution-stabilized.
(5) the composite upper interpolation Sodium Bromide of the present invention, main raising bactericidal property, it carries out preferably in one in Potassium Bromide, Sodium Bromide, lithiumbromide, lanthanum bromide, potassium bromate, sodium bromate or its any two kinds of mixtures, result proves that Sodium Bromide is more applicable in this formula, function is supplemented mutually, improve corrosion inhibition, expand out bactericidal property.
Reagent combination of the present invention belongs to environmental protection, has the advantages such as over-all properties is strong, production cost is low.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, set forth the present invention further, but following embodiment being only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art under the prerequisite not making creative work obtain other embodiment, all belong to protection scope of the present invention.
Embodiment: a kind of bactericidal properties water soluble copper corrosion inhibitor of the present invention, its ingredients by weight per-cent consists of:
Benzotriazole 15 ~ 30%
Sodium hydroxide 10 ~ 20%
Aqueous sodium bromide 8 ~ 10%
Polymaleic anhydride 15 ~ 30%
Zinc salt 5 ~ 10%
The water of surplus
Wherein the molecular-weight average of polymaleic anhydride is greater than 5500; Aqueous sodium bromide mass concentration is 5 ~ 10%.
The step of preparation method of the present invention is:
(1) zinc salt and water being added stirring at normal temperature in reactor makes zinc salt fully dissolve, and then adds polymaleic anhydride and stirs 20 ~ 30 minutes;
(2) under normal temperature state, sodium hydroxide is dissolved, when solution temperature is down to greenhouse, adds benzotriazole after it dissolves completely, adjust pH to be 7 ~ 9, this solution is joined in polymaleic acid-zinc salt reactor and stir 30 ~ 40 minutes;
(3) with water, Sodium Bromide is fully dissolved, form homogeneous sodium bromide solution;
(4) finally adding aqueous sodium bromide in a kettle. stirs after 10 ~ 20 minutes, namely obtains product after liquid to be mixed is even.
In order to prove inhibition of the present invention and bactericidal property, the Reliable Evaluating Methods of Their Performance of the bactericidal properties water soluble copper corrosion inhibitor of above-described embodiment gained is as follows:
Corrosion inhibition
Above-described embodiment adopts rotary hanging plate weight-loss method (HG/T 2159-1991) to carry out corrosion inhibition mensuration;
Plant and instrument: rotary hanging plate corrosion test instrument RCC type;
Test conditions: test temperature 45 DEG C, speed of rotation 80r/min, test period 72h, test water is thermoelectricity subsidiary factory of Anhui group recirculated water (adding chloride Biocidal algae-killing agent), test piece is cooling and contraction standard corrosion coupon I type, and corrosion rate is calculated as follows:
Y
0＝8760×m
0×10/(s×ρ×t)
Y
1＝8760×m×10/(s×ρ×t)
W＝(Y
0-Y
1)/Y
0×100％
Y
0---the corrosion rate of blank test test piece, mm/a;
Y
1---the corrosion rate of test piece after adding medicine, mm/a;
W---corrosion inhibition rate, %;
M
0---the mass loss of blank test test piece, g;
M---the mass loss of test piece after adding medicine, g;
S---strip amasss, cm
2;
ρ---test piece density, g/cm
3;
T---test period, h;
8760---the hours suitable with 1 year, h/a;
10---the millimeter suitable with 1cm; Mm/cm.
Corrosion inhibition measurement result sees the following form 1:
Table 1
As shown in Table 1, medicament of the present invention in the recirculated water of chloride Biocidal algae-killing agent scale resistance water soluble copper corrosion inhibitor than common composite copper inhibitor and single copper inhibitor corrosion inhibition rate high, and the corrosion mitigating effect to brass test piece under 20mg/L condition is the most obvious, corrosion inhibition rate can reach 91.2%.
Bactericidal property measures
Recirculated cooling water bactericidal property evaluation (DL/T 1116-2009) is adopted to measure:
Plant and instrument: balance, sensibility reciprocal 0.1mg, constant-temperature table, precision ± 2 DEG C, medical steam sterilization pan, oven, filtration sterilization equipment, biomicroscope;
Experiment condition: shaking table temperature 40 DEG C, rotating speed 100r/min ~ 120r/min, experimental period t are 10 hours, and test water sample is thermoelectricity subsidiary factory of Anhui group recirculated cooling water.Killing rate is calculated as follows:
Killing rate Y=(A
0-A
t/ A
0) × 100%
A
0---the bacterium sum that blank assay water sample is initial;
A
t---the bacterium sum that experiment water sample detects when t.
Bactericidal property measurement result sees the following form 2:
Table 2
As shown in Table 2, in the identical time, in the recirculated water of chloride Biocidal algae-killing agent bactericidal properties water soluble copper corrosion inhibitor than common composite copper inhibitor and single copper inhibitor sterilizing rate high, illustrate bactericidal properties water soluble copper corrosion inhibitor of the present invention have microbe killing properties can, improve sterilization effect.
To sum up, can find out from table 1, table 2, medicament of the present invention has excellent corrosion inhibition and bactericidal property, thus show that the present invention has sterilization, corrosion inhibitive function simultaneously, each component has good intermiscibility, synergetic property and complementarity, more more comprehensively more excellent than the copper inhibitor performance of common compound, the copper inhibitor of alternative existing common compound and simple function copper inhibitor.
Claims (4)
1. a bactericidal properties water soluble copper corrosion inhibitor, is characterized in that, its ingredients by weight per-cent consists of: benzotriazole 15 ~ 30%
Sodium hydroxide 10 ~ 20%
Aqueous sodium bromide 8 ~ 10%
Polymaleic anhydride 15 ~ 30%
Zinc salt 5 ~ 10%
The water of surplus.
2. a kind of bactericidal properties water soluble copper corrosion inhibitor according to claim 1, it is characterized in that, the molecular-weight average of described polymaleic anhydride is greater than 5500.
3. a kind of bactericidal properties water soluble copper corrosion inhibitor according to claim 1, is characterized in that, described aqueous sodium bromide mass concentration is 5 ~ 10%.
4. a kind of bactericidal properties water soluble copper corrosion inhibitor according to claim 1, is characterized in that, the step of its preparation method is:
(1) zinc salt and water being added stirring at normal temperature in reactor makes zinc salt fully dissolve, and then adds polymaleic anhydride and stirs 20 ~ 30 minutes;
(2) under normal temperature state, sodium hydroxide is dissolved, when solution temperature is down to greenhouse, adds benzotriazole after it dissolves completely, adjust pH to be 7 ~ 9, this solution is joined in reactor and stir 30 ~ 40 minutes;
(3) with water, Sodium Bromide is fully dissolved, form homogeneous sodium bromide solution;
(4) finally adding aqueous sodium bromide in a kettle. stirs after 10 ~ 20 minutes, namely obtains product after liquid to be mixed is even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395092.2A CN105018940A (en) | 2015-07-06 | 2015-07-06 | Bactericidal water soluble copper corrosion inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395092.2A CN105018940A (en) | 2015-07-06 | 2015-07-06 | Bactericidal water soluble copper corrosion inhibitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105018940A true CN105018940A (en) | 2015-11-04 |
Family
ID=54409228
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|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320779A (en) * | 1991-06-06 | 1994-06-14 | Nalco Chemical Company | Use of molybdate as corrosion inhibitor in a zinc/phosphonate cooling water treatment |
| CN1915866A (en) * | 2006-09-07 | 2007-02-21 | 武汉钢铁(集团)公司 | Long effective environmental protection type corrosion inhibitor for inclosed recirculated cooling water |
| CN101591074A (en) * | 2009-07-20 | 2009-12-02 | 浙江亚星源环保科技有限公司 | Phosphate-free water treatment agent and preparation method |
| CN101974760A (en) * | 2010-11-26 | 2011-02-16 | 赵清顺 | Oxidization-resistant copper corrosion inhibitor used in circulating cooling water system |
| CN103693765A (en) * | 2014-01-03 | 2014-04-02 | 广州市特种承压设备检测研究院 | Non-phosphorus corrosion and scale inhibitor for central air-conditioning circulating cooling water and preparation method thereof |
-
2015
- 2015-07-06 CN CN201510395092.2A patent/CN105018940A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320779A (en) * | 1991-06-06 | 1994-06-14 | Nalco Chemical Company | Use of molybdate as corrosion inhibitor in a zinc/phosphonate cooling water treatment |
| CN1915866A (en) * | 2006-09-07 | 2007-02-21 | 武汉钢铁(集团)公司 | Long effective environmental protection type corrosion inhibitor for inclosed recirculated cooling water |
| CN101591074A (en) * | 2009-07-20 | 2009-12-02 | 浙江亚星源环保科技有限公司 | Phosphate-free water treatment agent and preparation method |
| CN101974760A (en) * | 2010-11-26 | 2011-02-16 | 赵清顺 | Oxidization-resistant copper corrosion inhibitor used in circulating cooling water system |
| CN103693765A (en) * | 2014-01-03 | 2014-04-02 | 广州市特种承压设备检测研究院 | Non-phosphorus corrosion and scale inhibitor for central air-conditioning circulating cooling water and preparation method thereof |
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Application publication date: 20151104 |