CN108385117A - A kind of multi-functional alkaline cleaner and its preparation method and application - Google Patents
A kind of multi-functional alkaline cleaner and its preparation method and application Download PDFInfo
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- CN108385117A CN108385117A CN201810329159.6A CN201810329159A CN108385117A CN 108385117 A CN108385117 A CN 108385117A CN 201810329159 A CN201810329159 A CN 201810329159A CN 108385117 A CN108385117 A CN 108385117A
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- alkaline cleaner
- functional alkaline
- solubilizer
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of multi-functional alkaline cleaner, raw material components and parts by weight are：Potassium carbonate：2~5 parts；Sodium gluconate：2~5 parts；Cocoanut fatty acid diethanolamide：0.5~5 part；Neopelex：2~5 parts；Boric acid monoethanolamine：5~10 parts；Dipropylene glycol methyl ether：5 10 parts；Bleeding agent：5 10 parts；Solubilizer：0.5 5 parts；HEDP‑4Na：10 20 parts；Water complements to 100 parts.This cleaning agent treated steel product surface cleanness is high, no greasy residues remain without iron filings, rust deposite, dust particles and can still meet rust prevention during manufacture after flushing, and can increase steel product surface-brightening, and service life is long, low using concentration, rust-proof life was up to 10 20 days；Safe and environment-friendly, harmless, raw material sources are extensive, obtain and are easy, large-scale production at low cost, suitable.
Description
Technical field
The invention belongs to chemical cleaning, antirust fields, are related to cleaning, antirust agent, especially a kind of multi-functional alkalinity cleaning
Agent and preparation method thereof, the multi-functional alkaline cleaner can be used in the ash disposal of steel product surface, oil removing, derusting, antirust treatment
Aspect.
Background technology
Steel is in the modern industry using earliest, the maximum basic material of dosage.Steel product is in various process
It such as cuts, be ground, the dirts such as certain greasy dirt, iron powder, iron filings can be remained.These dirts pass through physical absorption or electrostatic
The modes such as absorption are bonded with metal in close, it is difficult to be removed.Meanwhile the chemical property of steel is more active, is chronically exposed in air
Can and oxygen have occurred oxidation reaction, or corroded by the oxygen element in water and become oxide, that is, our iron for often saying
Rust.Although these iron rust can be cleaned using existing cleaning agent, there are the following problems for existing cleaning agent：1, after cleaning
Steel product surface and oil contaminant is removed substantially, but a large amount of fine particles such as dust, iron powder can be remained etc.；2, for having got rusty before cleaning
Steel product, do not derust effect；3, steel product can get rusty in a relatively short period of time after cleaning.
Find there are following two with the relevant publication of this patent by retrieving：
1, multifunction detergent and preparation method (CN201110051370.4), component composition are respectively：Laruyl alcohol is poly-
Ether sodium sulfovinate 10%-30%, laureth -91%-5%, PPG-2 butyl ether 1%-5%, laureth -71%-5%,
Octyl glucoside 0.5%-2%, citric acid 0.1%-2%, daily essence 0.01%-0.5%, borax 0.1%-2%, alkali base
Property proteinase-10 .1%-2%, preservative 0.01%-0.5%, calcium chloride 0.01%-0.1%, surplus is deionized water.This product
It is mainly used for cleaning floor, ceramic tile, bathtub and various home articles surface and clothes cleaning.Not with use scope of the present invention
Together, there is the difference of essence with the present invention program.
2, dusting cleaning antirusting agent and its preparation method (CN102168279 B), component composition are respectively：Ethylene glycol four
Acetic acid solution：1-2%；Sodium Polyacrylate：1-4.5%；Isomery alcohol ether 2.5-7.5%；AEO-3：0.8-4.5；Propylene glycol monomethyl ether：
2.5-12%；Triazine fungicide：0.8-3；Surplus is water.This cleaning agent is to use organic basic chelated dispersants and surface-active
Agent, antirust agent are that primary raw material is prepared through science processing technology, and cleaning rear surface light is for example new, and after water rinses
It can reach rust prevention during manufacture requirement.There is the difference of essence with the present invention program.
By comparison, there is the difference of essence with above-mentioned patent publication us in present patent application.
Invention content
It is an object of the invention in place of overcome the deficiencies in the prior art, provide a kind of multi-functional alkaline cleaner and its system
Preparation Method, the cleaning agent are suitable for the ash disposal of steel product surface, oil removing, derusting, antirust treatment, immersion, vortex, drum can be used
The cleaning ways such as bubble, ultrasonic wave；It is high using this liquid treated steel product surface cleanness, no greasy residues, without iron filings, rust
Dirt, dust particles remain and can still meet rust prevention during manufacture after flushing, and can increase steel product surface-brightening, make
Long with the period, low using concentration, rust-proof life reaches 10-20 days；This product is safe and environment-friendly, harmless, and raw material sources are extensive, obtains
It tries to please easily, large-scale production at low cost, suitable.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of multi-functional alkaline cleaner, raw material components and parts by weight are：
Potassium carbonate K2CO3：2~5 parts；
Sodium gluconate：2~5 parts；
Cocoanut fatty acid diethanolamide C11H23CON(CH2CH2OH)2：0.5~5 part；
Neopelex C12H29NaS：2~5 parts；
Boric acid monoethanolamine：5~10 parts；
Dipropylene glycol methyl ether：5-10 parts；
Bleeding agent：2-10 parts；
Solubilizer：0.5-5 parts；
HEDP-4Na：10-20 parts；
Water complements to 100 parts.
Moreover, the bleeding agent is high-efficient penetrant.
Moreover, the solubilizer is efficient solubilizing agents.
A kind of preparation method of multi-functional alkaline cleaner as described above, steps are as follows：
(1) the water of reacting dose and HEDP-4Na liquid are added in reaction kettle according to the ratio, between 25-50 DEG C, reacting dose is added
Potassium carbonate, sodium gluconate, stirring is to being completely dissolved；It cools to 40 DEG C or less；
Proportionally be added cocoanut fatty acid diethanolamide, neopelex, bleeding agent, solubilizer,
Dipropylene glycol methyl ether is added in boric acid monoethanolamine, persistently stirs 30 minutes, until solution is as clear as crystal；It is kept in reaction process
25-45 DEG C of temperature of reaction kettle；
(3) cooled to room temperature after the completion of reacting stands 10-20 minutes to get multi-functional alkaline cleaner.
Multi-functional alkaline cleaner as described above is in terms of the ash disposal of steel product surface, oil removing, derusting, antirust treatment
Using.
The advantages of present invention obtains and good effect are：
1, this cleaning agent is constituted simple, and process operation is simple, mechanism of action science, potassium carbonate provide stable pH value and with
HEDP-4Na synergistic effects reach chelating, dispersion, the various dirts in stripping metal surface, and provide synergistic effect with it；Glucose
Sour sodium reaches the rust deposite on complexing steel product surface with HEDP-4Na synergistic effects, it is made to get off from steel product sur-face peeling；
Bleeding agent, cocoanut fatty acid diethanolamide (Ninol), neopelex can pass through the works such as infiltration, emulsion dispersion
The greasy dirt, dust, iron filings of steel surface are adsorbed on cleaning；HEDP-4Na is mutually adsorbed in metal surface with boric acid monoethanolamine
One layer of passivation, hydrophobic rust-preventing film, this film have repulsive interaction to water, greasy dirt；Therefore after cleaning, metal surface is very clean, without oil
Dirt residual；This rust-preventing film, rinsing or rinsing even across water still has rust-proof effect；Solubilizer is matched with dipropylene glycol methyl ether
Cooperation can effectively keep the low-temperature stabilization performance of the product with can effectively dissolve greasy dirt while improving cleaning speed,
It is particularly suitable for winter harsh northern area.
2, this cleaning agent is easy to use, with obvious effects, and dosage is less when use, the wide (40-70 of use temperature range
DEG C), it is economical (use quality (or weight) concentration 3-10%), using it is simple, safe and environment-friendly, be free of nitrite, working efficiency
Height, steel product does not need antirust agent progress antirust treatment and rust prevention during manufacture effect can be realized after cleaning.
3, this cleaning agent is that organic basic chelated dispersants and surfactant is used to add by science for primary raw material
Work technique is prepared, and steel product surface is without greasy dirt, iron rust, dust, iron powder residual after cleaning, and can reach rust prevention during manufacture
It is required that；This cleaning agent is raw materials used to derive from a wealth of sources in alkalinity, obtains easy, and by this product, treated that steel product can be straight
Tipping is matched or is packed.
4, this cleaning agent uses the processed steel product of this liquid using being applicable in immersion, being bubbled, vortex, ultrasonic cleaning
Surface cleanness is high, and surface is without particle, iron filings, hickie residual and surface-brightening, and service life is long, low using concentration, antirust
Phase reaches 15-20 days, even across rinsing, rinses still with rust-proof effect.And safety, environmental protection, raw material sources are extensive, obtain
It is easy, it is at low cost, it is suitble to large-scale production, this cleaning agent to be suitable for the ash disposal of steel product surface, oil removing, derusting, antirust treatment.
Specific implementation mode
The embodiment of the present invention is described in detail below, it should be noted that the present embodiment is narrative, is not limited
, protection scope of the present invention cannot be limited with this.
Raw material used in the present invention is unless otherwise specified conventional commercial product；Used in the present invention
Method is unless otherwise specified the conventional method of this field；Each material concentration used in the present invention is usually using dense
Degree.
Embodiment 1：
A kind of multi-functional alkaline cleaner, raw material components and its weight percent are respectively：
Potassium carbonate：3%；
Sodium gluconate：4%；
Cocoanut fatty acid diethanolamide C11H23CON(CH2CH2OH)2：3%；
Neopelex C12H29NaS：2%；
Boric acid monoethanolamine：5%；
Dipropylene glycol methyl ether：5%
High-efficient penetrant：10%
Efficient solubilizing agents：2%
HEDP-4Na：10%.
Surplus is water.
The preparation method of above-mentioned multi-functional alkaline cleaner, steps are as follows：
(1) the water of reacting dose and HEDP-4Na solution are added in reaction kettle according to the ratio, between 25-50 DEG C, reaction is added
Potassium carbonate, the sodium gluconate of amount, stirring is to being completely dissolved；It cools to 40 DEG C or less.
Proportionally be added cocoanut fatty acid diethanolamide, neopelex, high-efficient penetrant, efficiently
Dipropylene glycol methyl ether is added in solubilizer, boric acid monoethanolamine, persistently stirs 30 minutes, until solution is as clear as crystal.Reaction process
Middle 25-45 DEG C of holding temperature of reaction kettle.
(3) cooled to room temperature after the completion of reacting stands 10-20 minutes to get multi-functional alkaline cleaner.
Embodiment 2：
A kind of multi-functional alkaline cleaner, each component and its weight percent are respectively：
Potassium carbonate：2%；
Sodium gluconate：3%；
Cocoanut fatty acid diethanolamide C11H23CON(CH2CH2OH)2：4%；
Neopelex C12H29NaS：3%；
Boric acid monoethanolamine：8%；
Dipropylene glycol methyl ether：5%；
High-efficient penetrant：2%；
Efficient solubilizing agents：5%；
HEDP-4Na：12%.
Surplus is water.
The preparation method is the same as that of Example 1 for above-mentioned multi-functional alkaline cleaner.
Embodiment 3
A kind of multi-functional alkaline cleaner, raw material components and parts by weight are：
Potassium carbonate K2CO3：2~5 parts；
Sodium gluconate：2~5 parts；
Cocoanut fatty acid diethanolamide C11H23CON(CH2CH2OH)2：0.5~5 part；
Neopelex C12H29NaS：2~5 parts；
Boric acid monoethanolamine：5~10 parts；
Dipropylene glycol methyl ether：5-10 parts；
Bleeding agent：2-10 parts；
Solubilizer：0.5-5 parts；
HEDP-4Na：10-20 parts；
Water complements to 100 parts.
A kind of preparation method of multi-functional alkaline cleaner as described above, steps are as follows：
(1) the water of reacting dose and HEDP-4Na solution are added in reaction kettle according to the ratio, between 25-50 DEG C, reaction is added
Potassium carbonate, the sodium gluconate of amount, stirring is to being completely dissolved；It cools to 40 DEG C or less；
Proportionally be added cocoanut fatty acid diethanolamide, neopelex, bleeding agent, solubilizer,
Dipropylene glycol methyl ether is added in boric acid monoethanolamine, persistently stirs 30 minutes, until solution is as clear as crystal；It is kept in reaction process
25-45 DEG C of temperature of reaction kettle.
(3) cooled to room temperature after the completion of reacting stands 10-20 minutes to get multi-functional alkaline cleaner.
Multi-functional alkaline cleaner as described above, in terms of the ash disposal of steel product surface, oil removing, derusting, antirust treatment
Application.
Application example 1：
Heat exchanger carbon steel sheet of washing after machining is cleaned into heat exchanger carbon steel plate surface with cleaning agent of the present invention with Bubbling method
Greasy dirt, dust, iron filings, rust deposite, when temperature 50 C, clean 10 minutes, then working solution concentration 10% is rinsed well, processing
Steel plate light afterwards is for example new, no solid residue, no white residue.By this steel plate in storehouse do not occur after 20 days corrosion,
Spot corrosion is precipitated without white residue.
Application example 2：
By the part after machining；With the abrasive pastes on cleaning agent of the present invention ultrasonic cleaning steel components surface, dust,
Iron filings when 65 DEG C of temperature, clean 6 minutes, working solution concentration 3%, then rinsed clean, treated, and part light is for example new, nothing
Solid residue, no white residue.This steel plate is not occurred into corrosion, spot corrosion after 10 days in storehouse, is analysed without white residue
Go out.
Quality standard：
Appearance：It is colourless to light yellow transparent liquid；
Density：1.232~1.252；
Refractive power value：40~44；
Equipment, workpiece：Without greasy dirt, solid particle, iron rust residual after cleaning；Without white point after washing；
Antirust time：20 days or less；
Use concentration：3~10% dilutions；
Cleaning temperature:40~70 DEG C；
It impregnates, vortex, be bubbled, sonication times：3~30 minutes.
Claims (5)
1. a kind of multi-functional alkaline cleaner, it is characterised in that：Its raw material components and parts by weight are：
Potassium carbonate K2CO3：2~5 parts；
Sodium gluconate：2~5 parts；
Cocoanut fatty acid diethanolamide C11H23CON(CH2CH2OH)2：0.5~5 part；
Neopelex C12H29NaS：2~5 parts；
Boric acid monoethanolamine：5~10 parts；
Dipropylene glycol methyl ether：5-10 parts；
Bleeding agent：2-10 parts；
Solubilizer：0.5-5 parts；
HEDP-4Na：10-20 parts；
Water complements to 100 parts.
2. multi-functional alkaline cleaner according to claim 1, it is characterised in that：The bleeding agent is high-efficient penetrant.
3. multi-functional alkaline cleaner according to claim 1, it is characterised in that：The solubilizer is efficient solubilizing agents.
4. a kind of preparation method of multi-functional alkaline cleaner as described in any one of claims 1 to 3, it is characterised in that：Step
It is rapid as follows：
(1) the water of reacting dose and HEDP-4Na liquid are added in reaction kettle according to the ratio, between 25-50 DEG C, the carbon of reacting dose is added
Sour potassium, sodium gluconate, stirring is to being completely dissolved；It cools to 40 DEG C or less；
(2) cocoanut fatty acid diethanolamide, neopelex, bleeding agent, solubilizer, boric acid are proportionally added
Dipropylene glycol methyl ether is added in monoethanolamine, persistently stirs 30 minutes, until solution is as clear as crystal；Reaction is kept in reaction process
25-45 DEG C of kettle temperature degree；
(3) cooled to room temperature after the completion of reacting stands 10-20 minutes to get multi-functional alkaline cleaner.
5. multi-functional alkaline cleaner as described in any one of claims 1 to 3 the ash disposal of steel product surface, oil removing, derusting,
Application in terms of antirust treatment.
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| CN201810329159.6A CN108385117B (en) | 2018-04-13 | 2018-04-13 | multifunctional alkaline cleaning agent and preparation method and application thereof |
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| CN201810329159.6A CN108385117B (en) | 2018-04-13 | 2018-04-13 | multifunctional alkaline cleaning agent and preparation method and application thereof |
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| CN108385117A true CN108385117A (en) | 2018-08-10 |
| CN108385117B CN108385117B (en) | 2019-12-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979554A (en) * | 2020-07-28 | 2020-11-24 | 华阳新兴科技（天津）集团有限公司 | Rapid cleaning agent for aluminum plate and strip and preparation method and application thereof |
| CN113583765A (en) * | 2021-08-11 | 2021-11-02 | 诺而曼环保科技（江苏）有限公司 | Emulsified hydrocarbon cleaning agent and preparation method thereof |
| CN114082305A (en) * | 2021-11-11 | 2022-02-25 | 西安热工研究院有限公司 | Reverse osmosis cleaning agent for microbial and organic pollution and preparation method thereof |
| CN114318353A (en) * | 2021-12-27 | 2022-04-12 | 广东红日星实业有限公司 | Ash remover and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674250A (en) * | 2013-12-02 | 2015-06-03 | 青岛浩泰水务有限公司 | Ferrous metal alkaline cleaner |
| CN105821429A (en) * | 2016-04-21 | 2016-08-03 | 丽水市人民医院 | Maintenance method for rust prevention of stainless steel pool for cleaning medical instrument in hospital |
| CN106702401A (en) * | 2015-11-16 | 2017-05-24 | 安徽鸿源新型润滑材料有限公司 | Cleaning agent and preparation method thereof |
| CN107761123A (en) * | 2017-10-13 | 2018-03-06 | 广州迪奕科环保科技有限公司 | A kind of environmentally friendly oil pipeline cleaning agent |
-
2018
- 2018-04-13 CN CN201810329159.6A patent/CN108385117B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104674250A (en) * | 2013-12-02 | 2015-06-03 | 青岛浩泰水务有限公司 | Ferrous metal alkaline cleaner |
| CN106702401A (en) * | 2015-11-16 | 2017-05-24 | 安徽鸿源新型润滑材料有限公司 | Cleaning agent and preparation method thereof |
| CN105821429A (en) * | 2016-04-21 | 2016-08-03 | 丽水市人民医院 | Maintenance method for rust prevention of stainless steel pool for cleaning medical instrument in hospital |
| CN107761123A (en) * | 2017-10-13 | 2018-03-06 | 广州迪奕科环保科技有限公司 | A kind of environmentally friendly oil pipeline cleaning agent |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979554A (en) * | 2020-07-28 | 2020-11-24 | 华阳新兴科技（天津）集团有限公司 | Rapid cleaning agent for aluminum plate and strip and preparation method and application thereof |
| CN113583765A (en) * | 2021-08-11 | 2021-11-02 | 诺而曼环保科技（江苏）有限公司 | Emulsified hydrocarbon cleaning agent and preparation method thereof |
| CN114082305A (en) * | 2021-11-11 | 2022-02-25 | 西安热工研究院有限公司 | Reverse osmosis cleaning agent for microbial and organic pollution and preparation method thereof |
| CN114318353A (en) * | 2021-12-27 | 2022-04-12 | 广东红日星实业有限公司 | Ash remover and preparation method and application thereof |
| CN114318353B (en) * | 2021-12-27 | 2023-12-05 | 广东红日星实业有限公司 | Ash remover and preparation method and application thereof |
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Effective date of registration: 20210219 Address after: 300000 within 42 HongRi South Road, Nankai District, Tianjin (Science and Technology Park) Patentee after: HUAYANG XINXING TECHNOLOGY (TIANJIN) GROUP Co.,Ltd. Patentee after: Leshi Technology (Tianjin) Co.,Ltd. Address before: 300111 No.42, HongRi South Road, Nankai District, Tianjin (Science and Technology Park) Patentee before: HUAYANG XINXING TECHNOLOGY (TIANJIN) GROUP Co.,Ltd. |