CN102400165B - Cleaning agent for stainless steel seamless stay tubes and preparation method for cleaning agent - Google Patents
Cleaning agent for stainless steel seamless stay tubes and preparation method for cleaning agent Download PDFInfo
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- CN102400165B CN102400165B CN201110383902.4A CN201110383902A CN102400165B CN 102400165 B CN102400165 B CN 102400165B CN 201110383902 A CN201110383902 A CN 201110383902A CN 102400165 B CN102400165 B CN 102400165B
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 44
- 239000010935 stainless steel Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000012459 cleaning agent Substances 0.000 title abstract description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 36
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 24
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 13
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 8
- -1 polyoxyethylene Polymers 0.000 claims abstract description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 5
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 66
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 7
- 229940095064 tartrate Drugs 0.000 claims description 7
- 229960004418 trolamine Drugs 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 12
- 235000010299 hexamethylene tetramine Nutrition 0.000 abstract description 5
- 230000006378 damage Effects 0.000 abstract description 3
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 abstract 1
- 239000004312 hexamethylene tetramine Substances 0.000 abstract 1
- 235000015393 sodium molybdate Nutrition 0.000 abstract 1
- 239000011684 sodium molybdate Substances 0.000 abstract 1
- 239000011975 tartaric acid Substances 0.000 abstract 1
- 235000002906 tartaric acid Nutrition 0.000 abstract 1
- 239000000047 product Substances 0.000 description 8
- 235000015165 citric acid Nutrition 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000003995 emulsifying agent Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000012466 permeate Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 244000019397 Pinus jeffreyi Species 0.000 description 2
- 235000013267 Pinus ponderosa Nutrition 0.000 description 2
- 235000006237 Pinus sabiniana Nutrition 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Detergent Compositions (AREA)
Abstract
The invention relates to the technical field of chemical cleaning, in particular to a cleaning agent for stainless steel seamless stay tubes and a preparation method for the cleaning agent. The cleaning agent for the stainless steel seamless stay tubes is prepared by mixing the following raw materials in percentage by weight at normal temperature: 45.5 to 72.75 percent of water, 1 to 2 percent of alkylphenol polyoxyethylene, 2.5 to 5 percent of citric acid, 5 to 10 percent of oxalic acid, 2.5 to 5 percent of sodium molybdate, 5 to 10 percent of triethanolamine, 7.5 to 15 percent of fatty alcohol-polyoxyethylene ether, 3 to 6 percent of tartaric acid, 0.25 to 0.5 percent of nitric acid, 0.25 to 0.5 percent of hydrofluoric acid and the balance of hexamethylenetetramine. The cleaning agent for the stainless steel seamless stay tubes has novel process, is easy to operate and strong in cleaning force, does not need to be heated, can be reused, can be used for cleaning the stainless steel seamless stay tubes without corroding the surface of stainless steel, and keeps the glossiness of the stainless steel; and the cleaning agent for the stainless steel seamless stay tubes has no injury to the skin, is low-carbon and environment-friendly, has high cost performance, and saves the cost.
Description
Technical field
The present invention relates to chemical cleaning technique field, especially a kind of clean-out system that is applicable to stainless steel jointless trombone slide and preparation method thereof.
Background technology
At present, stainless steel jointless trombone slide is difficult to clean up, especially the one-level hollow billet that first operation is produced, because the inside and outside upper layer of hollow billet becomes Pinhole-shaped, pin hole must clean up, if first operation does not clean up, bring quality problems can to the continuous trombone slide in second, third road, cause the earial drainage of finished product stainless steel jointless trombone slide.Traditional cleaning agent formula is to heat to 65 ℃ after the 5:4:3:8 mixing by mass percentage of nitric acid, hydrofluoric acid, hydrochloric acid and water, stainless steel jointless trombone slide to be cleaned need to soak and just can clean up for 1.5 hours, along with the reduction of detergent concentration, scavenging period can elongate.Because nitric acid, hydrofluoric acid and hydrochloric acid are through heating generation acid mist, human body is had to great harm, and severe contamination air, the discharge of waste acid water is severe contamination water resources also.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency in prior art, provide a kind of without heating, can, by clean stainless steel jointless trombone slide strong acid, shorten scavenging period, and stainless steel jointless trombone slide clean-out system harmless and free from environmental pollution and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of stainless steel jointless trombone slide clean-out system, is become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
Preferred stainless steel jointless trombone slide clean-out system is STAINLESS STEEL WIRE cleaning liquid, and described stainless steel jointless trombone slide cleaning liquid is become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
When stainless steel jointless trombone slide cleaning liquid used after for some time, cleaning performance is not obvious, now needs to add stainless steel jointless trombone slide and cleans annex solution, and described stainless steel jointless trombone slide cleans annex solution and become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
The preparation method of stainless steel jointless trombone slide clean-out system of the present invention, has following steps:
(1), under normal temperature, in stirrer, adding weight percent is the water of 45.5%-72.75%;
(2), throw in while stirring the alkylphenol polyoxyethylene that weight percent is 1%-2%;
(3), throw in while stirring the citric acid that weight percent is 2.5%-5%;
(4), throw in while stirring the oxalic acid that weight percent is 5%-10%;
(5), throw in while stirring the Sodium orthomolybdate that weight percent is 2.5%-5%;
(6), throw in while stirring the trolamine that weight percent is 5%-10%;
(7), throw in while stirring the fatty alcohol-polyoxyethylene ether that weight percent is 7.5%-15%;
(8), throw in while stirring the tartrate that weight percent is 3%-6%;
(9), throw in while stirring the nitric acid that weight percent is 0.25%-0.5%;
(10), throw in while stirring the hydrofluoric acid that weight percent is 0.25%-0.5%;
(11), throw in while stirring the vulkacit H that weight percent is surplus;
(12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product;
The content of wherein said hydrofluoric acid is 44%.
Principle of work of the present invention is: alkylphenol polyoxyethylene is removed the greasy dirt of stainless steel jointless trombone slide workpiece surface; Citric acid and oxalic acid reduce the activity of iron ion, extend the work-ing life of clean-out system, also can play the effect of taste masking simultaneously; Fatty alcohol-polyoxyethylene ether can be by obstinate stainless steel jointless trombone slide workpiece surface sinter bull pine; Nitric acid and tartrate can peel off obstinate 80% of bull pine thing get off; Sodium orthomolybdate and hydrofluoric acid thoroughly clean up the last 20% bad thing that is attached to stainless steel jointless trombone slide top layer; Sodium orthomolybdate, trolamine and vulkacit H are in the stainless steel jointless trombone slide surface adsorption cleaning up and form one deck passive film.
The invention has the beneficial effects as follows: new technology of the present invention, simple to operate, cleaning force is strong, without heating, and can Reusability, can clean stainless steel jointless trombone slide and not corrode stainless surface simultaneously, keep stainless glossiness, and stainless steel jointless trombone slide clean-out system to skin contact without injury, low-carbon environment-friendly, cost performance is high, cost-saving.
Embodiment
The present invention is further illustrated in conjunction with the preferred embodiments now, and in embodiment, fatty alcohol-polyoxyethylene ether is JFC permeate agent, and alkylphenol polyoxyethylene is emulsifier op-10, and vulkacit H is urotropine.
Embodiment 1
A preparation method for stainless steel jointless trombone slide clean-out system, has following steps: under (1), normal temperature, add the water of 727.5 kilograms in stirrer; (2), throwing in while stirring the content of 10 kilograms is 99% emulsifier op-10; (3), throwing in while stirring content is 25 kilograms of 99.5% citric acids; (4), throwing in while stirring content is 50 kilograms of 99.6% oxalic acid; (5), throwing in while stirring content is 25 kilograms of 99% Sodium orthomolybdates; (6), throwing in while stirring content is 50 kilograms of 85% trolamines; (7), throw in while stirring 75 kilograms of JFC permeate agents; (8), throwing in while stirring content is 30 kilograms, 99% tartrate; (9), throwing in while stirring content is 2.5 kilograms, 90% nitric acid; (10), throwing in while stirring content is 2.5 kilograms, 44% hydrofluoric acid; (11), throwing in while stirring content is 2.5 kilograms of 99% urotropines; (12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product.
Embodiment 2
A preparation method for stainless steel jointless trombone slide clean-out system, has following steps: under (1), normal temperature, add the water of 619.5 kilograms in stirrer; (2), throwing in while stirring the content of 12 kilograms is 99% emulsifier op-10; (3), throwing in while stirring content is 38 kilograms of 99.5% citric acids; (4), throwing in while stirring content is 65 kilograms of 99.6% oxalic acid; (5), throwing in while stirring content is 30 kilograms of 99% Sodium orthomolybdates; (6), throwing in while stirring content is 75 kilograms of 85% trolamines; (7), throw in while stirring 100 kilograms of JFC permeate agents; (8), throwing in while stirring content is 50 kilograms, 99% tartrate; (9), throwing in while stirring content is 3 kilograms, 90% nitric acid; (10), throwing in while stirring content is 3.5 kilograms, 44% hydrofluoric acid; (11), throwing in while stirring content is 4 kilograms of 99% urotropines; (12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product.
Embodiment 3
A preparation method for stainless steel jointless trombone slide clean-out system, has following steps: under (1), normal temperature, add the water of 552.5 kilograms in stirrer; (2), throwing in while stirring the content of 17 kilograms is 99% emulsifier op-10; (3), throwing in while stirring content is 43 kilograms of 99.5% citric acids; (4), throwing in while stirring content is 80 kilograms of 99.6% oxalic acid; (5), throwing in while stirring content is 40 kilograms of 99% Sodium orthomolybdates; (6), throwing in while stirring content is 80 kilograms of 85% trolamines; (7), throw in while stirring JFC permeate agent 120 kg; (8), throwing in while stirring content is 55 kilograms, 99% tartrate; (9), throwing in while stirring content is 4 kilograms, 90% nitric acid; (10), throwing in while stirring content is 4 kilograms, 44% hydrofluoric acid; (11), throwing in while stirring content is 4.5 kilograms of 99% urotropines; (12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product.
Embodiment 4
A preparation method for stainless steel jointless trombone slide clean-out system, has following steps: under (1), normal temperature, add the water of 455 kilograms in stirrer; (2), throwing in while stirring the content of 20 kilograms is 99% emulsifier op-10; (3), throwing in while stirring content is 50 kilograms of 99.5% citric acids; (4), throwing in while stirring content is 100 kilograms of 99.6% oxalic acid; (5), throwing in while stirring content is 50 kilograms of 99% Sodium orthomolybdates; (6), throwing in while stirring content is 100 kilograms of 85% trolamines; (7), throw in while stirring 150 kilograms of JFC permeate agents; (8), throwing in while stirring content is 60 kilograms, 99% tartrate; (9), throwing in while stirring content is 5 kilograms, 90% nitric acid; (10), throwing in while stirring content is 5 kilograms, 44% hydrofluoric acid; (11), throwing in while stirring content is 5 kilograms of 99% urotropines; (12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product.
The finished product that embodiment 1 obtains is stainless steel jointless trombone slide cleaning liquid, and the finished product that embodiment 4 obtains is that stainless steel jointless trombone slide cleans annex solution.When use, stainless steel jointless trombone slide cleaning liquid is poured in clean groove, soaked the workpiece of required processing, the treatment time is 45-50 minute, without heating; After workpiece immersion totally goes out groove, rinse well with High Pressure Gun, dry or oven drying at low temperature.Can't process totally if find to exceed 60 minutes, must add stainless steel jointless trombone slide and clean annex solution.
Above-described embodiment is only explanation technical conceive of the present invention and feature; its object is to allow person skilled in the art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (4)
1. a stainless steel jointless trombone slide clean-out system, is characterized in that: described stainless steel jointless trombone slide clean-out system is become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
2. stainless steel jointless trombone slide clean-out system according to claim 1, is characterized in that: described stainless steel jointless trombone slide clean-out system is become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
3. stainless steel jointless trombone slide clean-out system according to claim 1, is characterized in that: described stainless steel jointless trombone slide clean-out system is become by the mixed raw material of following weight percent:
The content of wherein said hydrofluoric acid is 44%.
4. a preparation method for stainless steel jointless trombone slide clean-out system according to claim 1, is characterized in that: have following steps:
(1), under normal temperature, in stirrer, adding weight percent is the water of 45.5%-72.75%;
(2), throw in while stirring the alkylphenol polyoxyethylene that weight percent is 1%-2%;
(3), throw in while stirring the citric acid that weight percent is 2.5%-5%;
(4), throw in while stirring the oxalic acid that weight percent is 5%-10%;
(5), throw in while stirring the Sodium orthomolybdate that weight percent is 2.5%-5%;
(6), throw in while stirring the trolamine that weight percent is 5%-10%;
(7), throw in while stirring the fatty alcohol-polyoxyethylene ether that weight percent is 7.5%-15%;
(8), throw in while stirring the tartrate that weight percent is 3%-6%;
(9), throw in while stirring the nitric acid that weight percent is 0.25%-0.5%;
(10), throw in while stirring the hydrofluoric acid that weight percent is 0.25%-0.5%;
(11), throw in while stirring the vulkacit H that weight percent is surplus;
(12), after whole feeding in raw material, stir again and within 20-30 minute, be finished product;
The content of wherein said hydrofluoric acid is 44%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110383902.4A CN102400165B (en) | 2011-11-28 | 2011-11-28 | Cleaning agent for stainless steel seamless stay tubes and preparation method for cleaning agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110383902.4A CN102400165B (en) | 2011-11-28 | 2011-11-28 | Cleaning agent for stainless steel seamless stay tubes and preparation method for cleaning agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102400165A CN102400165A (en) | 2012-04-04 |
| CN102400165B true CN102400165B (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110383902.4A Active CN102400165B (en) | 2011-11-28 | 2011-11-28 | Cleaning agent for stainless steel seamless stay tubes and preparation method for cleaning agent |
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| CN103422101A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Cleaning operating solution for stainless steel and iron member composite boards |
| CN103422099A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | A cleaning agent for stainless steel and iron member composite boards and a preparation method of the cleaning agent |
| CN103422103A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Degreasing agent for stainless steel and iron member composite boards and applications of the degreasing agent |
| CN103422105A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Detergent for stainless steel and iron member composite boards and applications of the detergent |
| CN103422104A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Rust remover for stainless steel and iron member composite boards |
| CN103422100A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Preparation method of cleaning operating solution for stainless steel and iron member composite boards |
| CN103422106A (en) * | 2012-05-22 | 2013-12-04 | 苏州一方金属表面处理科技有限公司 | Cleaning treating solution for stainless steel and iron member composite boards |
| CN103590056A (en) * | 2012-08-14 | 2014-02-19 | 苏州一方金属表面处理科技有限公司 | Cold-rolled sheet detergent |
| CN103590028A (en) * | 2012-08-14 | 2014-02-19 | 苏州一方金属表面处理科技有限公司 | Cold-rolled sheet passivator |
| CN103590053A (en) * | 2012-08-14 | 2014-02-19 | 苏州一方金属表面处理科技有限公司 | Scale remover for metal galvanized member |
| CN103590054A (en) * | 2012-08-14 | 2014-02-19 | 苏州一方金属表面处理科技有限公司 | Cleaning passivator for galvanized metal part |
| CN104073795A (en) * | 2014-06-11 | 2014-10-01 | 江苏华程工业制管股份有限公司 | Treating fluid for stainless steel seamless extruded tubes |
| CN104073822A (en) * | 2014-06-11 | 2014-10-01 | 江苏华程工业制管股份有限公司 | Preparation method of treating fluid for stainless steel seamless extruded pipes |
| CN104073794A (en) * | 2014-06-11 | 2014-10-01 | 江苏华程工业制管股份有限公司 | Treating fluid for stainless steel seamless extruded tubes and preparation method of treating fluid |
| CN104109873A (en) * | 2014-06-16 | 2014-10-22 | 张家港沙龙精密管业有限公司 | A preparing method of an aluminium-alloy pipe cleaning additive fluid |
| CN104109872A (en) * | 2014-06-16 | 2014-10-22 | 张家港沙龙精密管业有限公司 | An aluminium-alloy pipe cleaning additive fluid and a preparing method thereof |
| CN104087959A (en) * | 2014-06-16 | 2014-10-08 | 张家港沙龙精密管业有限公司 | Preparation method of aluminum alloy tube descaling operating fluid |
| CN106894027A (en) * | 2017-03-24 | 2017-06-27 | 桥运精密部件（苏州）有限公司 | A kind of STAINLESS STEEL WIRE cleaning agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135056A (en) * | 2007-09-29 | 2008-03-05 | 吴铭鑫 | Stainless steel cleaning agent |
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- 2011-11-28 CN CN201110383902.4A patent/CN102400165B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135056A (en) * | 2007-09-29 | 2008-03-05 | 吴铭鑫 | Stainless steel cleaning agent |
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Owner name: JINGJIANG WEIYI INTELLECTUAL PROPERTY SERVICE CO., Free format text: FORMER OWNER: CHANGZHOU KAINA ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. Effective date: 20140423 |
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Inventor after: Wang Tianyi Inventor before: Yang Xilong |
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