CN114086192B - Environment-friendly stainless steel cleaning agent and preparation method thereof - Google Patents
Environment-friendly stainless steel cleaning agent and preparation method thereof Download PDFInfo
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- CN114086192B CN114086192B CN202111399923.5A CN202111399923A CN114086192B CN 114086192 B CN114086192 B CN 114086192B CN 202111399923 A CN202111399923 A CN 202111399923A CN 114086192 B CN114086192 B CN 114086192B
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- cyclodextrin
- starch
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- oxidized starch
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 45
- 239000010935 stainless steel Substances 0.000 title claims abstract description 45
- 239000012459 cleaning agent Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000001254 oxidized starch Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 23
- 239000004094 surface-active agent Substances 0.000 claims abstract description 21
- 229920002472 Starch Polymers 0.000 claims abstract description 20
- 235000019698 starch Nutrition 0.000 claims abstract description 18
- 239000008107 starch Substances 0.000 claims abstract description 18
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- 239000002270 dispersing agent Substances 0.000 claims abstract description 9
- 239000002738 chelating agent Substances 0.000 claims abstract description 7
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 36
- 235000013808 oxidized starch Nutrition 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 21
- 229920000858 Cyclodextrin Polymers 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000001116 FEMA 4028 Substances 0.000 claims description 14
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims description 14
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims description 14
- 229960004853 betadex Drugs 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 12
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 claims description 11
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 239000001119 stannous chloride Substances 0.000 claims description 11
- 235000011150 stannous chloride Nutrition 0.000 claims description 11
- 229920002261 Corn starch Polymers 0.000 claims description 10
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 10
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000008120 corn starch Substances 0.000 claims description 10
- 108010064470 polyaspartate Proteins 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 9
- 239000012964 benzotriazole Substances 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 8
- 239000001509 sodium citrate Substances 0.000 claims description 8
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical group O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 8
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 claims description 6
- TVFWYUWNQVRQRG-UHFFFAOYSA-N 2,3,4-tris(2-phenylethenyl)phenol Chemical compound C=1C=CC=CC=1C=CC1=C(C=CC=2C=CC=CC=2)C(O)=CC=C1C=CC1=CC=CC=C1 TVFWYUWNQVRQRG-UHFFFAOYSA-N 0.000 claims description 6
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 229940117013 triethanolamine oleate Drugs 0.000 claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- YZOUYRAONFXZSI-SBHWVFSVSA-N (1S,3R,5R,6R,8R,10R,11R,13R,15R,16R,18R,20R,21R,23R,25R,26R,28R,30R,31S,33R,35R,36R,37S,38R,39S,40R,41S,42R,43S,44R,45S,46R,47S,48R,49S)-5,10,15,20,25,30,35-heptakis(hydroxymethyl)-37,39,40,41,42,43,44,45,46,47,48,49-dodecamethoxy-2,4,7,9,12,14,17,19,22,24,27,29,32,34-tetradecaoxaoctacyclo[31.2.2.23,6.28,11.213,16.218,21.223,26.228,31]nonatetracontane-36,38-diol Chemical compound O([C@@H]([C@H]([C@@H]1OC)OC)O[C@H]2[C@@H](O)[C@@H]([C@@H](O[C@@H]3[C@@H](CO)O[C@@H]([C@H]([C@@H]3O)OC)O[C@@H]3[C@@H](CO)O[C@@H]([C@H]([C@@H]3OC)OC)O[C@@H]3[C@@H](CO)O[C@@H]([C@H]([C@@H]3OC)OC)O[C@@H]3[C@@H](CO)O[C@@H]([C@H]([C@@H]3OC)OC)O3)O[C@@H]2CO)OC)[C@H](CO)[C@H]1O[C@@H]1[C@@H](OC)[C@H](OC)[C@H]3[C@@H](CO)O1 YZOUYRAONFXZSI-SBHWVFSVSA-N 0.000 claims description 2
- CUJVBAPGYBSBHJ-YWBSARSQSA-N 2-[[(1R,3R,5R,6S,8R,10R,11S,13R,15R,16S,18R,20R,21R,23R,25R,26R,28R,30R,31R,33R,35R,36R,37R,38R,39R,40R,41R,42R,43R,44R,45R,46R,47R,48R,49R)-36,38,40,42-tetrakis(carboxymethoxy)-10,15-bis(carboxymethoxymethyl)-37,39,41,43,44,45,46,47,48,49-decahydroxy-20,25,30,35-tetrakis(hydroxymethyl)-2,4,7,9,12,14,17,19,22,24,27,29,32,34-tetradecaoxaoctacyclo[31.2.2.23,6.28,11.213,16.218,21.223,26.228,31]nonatetracontan-5-yl]methoxy]acetic acid Chemical compound OC[C@H]1O[C@@H]2O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@H]3[C@H](O)[C@@H](O)[C@H](O[C@@H]3COCC(O)=O)O[C@@H]3[C@@H](CO)O[C@H](O[C@@H]4[C@@H](CO)O[C@H](O[C@@H]5[C@@H](CO)O[C@H](O[C@H]1[C@H](OCC(O)=O)[C@H]2O)[C@H](O)[C@H]5OCC(O)=O)[C@H](O)[C@H]4OCC(O)=O)[C@H](O)[C@H]3OCC(O)=O CUJVBAPGYBSBHJ-YWBSARSQSA-N 0.000 claims description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 2
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 2
- 240000003183 Manihot esculenta Species 0.000 claims description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 2
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims description 2
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- ODLHGICHYURWBS-LKONHMLTSA-N trappsol cyclo Chemical compound CC(O)COC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](COCC(C)O)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)COCC(O)C)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1COCC(C)O ODLHGICHYURWBS-LKONHMLTSA-N 0.000 claims description 2
- 229940100445 wheat starch Drugs 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 235000015165 citric acid Nutrition 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 239000013530 defoamer Substances 0.000 description 7
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- -1 steam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- 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
- C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
- C23G1/18—Organic inhibitors
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses an environment-friendly stainless steel cleaning agent, which comprises the following components in percentage by weight: 5-10% of cyclodextrin-oxidized starch compound, 15-20% of surfactant, 3-5% of dispersing agent, 0.5-1% of chelating agent, 0.05-0.2% of corrosion inhibitor, 1-2% of defoaming agent and the balance of water. The invention also discloses a preparation method of the environment-friendly stainless steel cleaning agent. The stainless steel cleaning agent is an aqueous cleaning agent, is prepared by compounding starch-based raw materials and a surfactant, is safe and environment-friendly, has stable performance, is high in cleaning speed of oil stains on the surface of stainless steel, and has an excellent oil stain cleaning effect.
Description
Technical Field
The invention relates to the technical field of stainless steel cleaning agents, in particular to an environment-friendly stainless steel cleaning agent and a preparation method thereof.
Background
Stainless steel has excellent performance of resisting corrosion of medium such as atmosphere, steam, water and the like, has good mechanical property and low production cost, and along with the development of industrialization in China and the improvement of performance standards of civil life products, the demands on the stainless steel and the products thereof are continuously increased. During stainless steel processing, stainless steel parts, semi-finished products and articles often have some contaminants left behind on their surfaces, including mainly dust and oil stains, such as mineral oil, cutting fluids, waxes, etc. At present, stainless steel cleaning agents used for cleaning pollutants on the surface of stainless steel are mainly cleaning agents containing strong acid or strong alkaline substances, such as cleaning agents containing hydrofluoric acid, and the strong acid and the strong alkali not only can cause potential pollution to the environment and are difficult to discharge, but also can generate certain corrosion effect on a stainless steel substrate, and the application of the stainless steel cleaning agents is greatly limited. Therefore, the development of the stainless steel cleaning agent which is water-based, environment-friendly, stable in performance and excellent in oil stain cleaning effect is an important development direction at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an environment-friendly stainless steel cleaning agent and a preparation method thereof.
The invention is realized by the following technical scheme:
an environment-friendly stainless steel cleaning agent comprises the following components in percentage by weight: 5-10% of cyclodextrin-oxidized starch compound, 15-20% of surfactant, 3-5% of dispersing agent, 0.5-1% of chelating agent, 0.05-0.2% of corrosion inhibitor, 1-2% of defoaming agent and the balance of water.
Preferably, the preparation method of the cyclodextrin-oxidized starch compound comprises the following steps: firstly, oxidizing starch with an oxidant under alkaline conditions to obtain oxidized starch; and then under the action of citric acid and stannous chloride, carrying out a crosslinking reaction on the oxidized starch and beta-cyclodextrin or derivatives thereof to obtain a cyclodextrin-oxidized starch compound.
Preferably, the preparation method of the cyclodextrin-oxidized starch compound comprises the following steps:
(1) Adding starch into water, mixing uniformly to obtain starch slurry with solid content of 10-20%, regulating pH of the slurry to 8.5-10 with sodium hydroxide, adding oxidant, stirring at 30-40deg.C for reaction for 4-6 hr, regulating pH to neutrality, filtering, and drying to obtain oxidized starch;
(2) Adding the oxidized starch and the beta-cyclodextrin or the derivative thereof into a proper amount of water to be uniformly dispersed, then adding citric acid and stannous chloride, stirring and reacting for 2-5 hours at 50-80 ℃, and then filtering and drying to obtain the cyclodextrin-oxidized starch compound.
Preferably, the oxidant is used in an amount of 0.5-2% by weight of the starch; the oxidant is one or a mixture of more of potassium permanganate, sodium hypochlorite and hydrogen peroxide.
Preferably, the weight ratio of the oxidized starch to the beta-cyclodextrin or the derivative thereof is 100: (10-20); the starch is one or more of corn starch, wheat starch and tapioca starch; the derivative of the beta-cyclodextrin is one or a mixture of more of hydroxypropyl-beta-cyclodextrin, carboxymethyl-beta-cyclodextrin and methyl-beta-cyclodextrin.
Preferably, the weight ratio of the oxidized starch to the citric acid to the stannous chloride is 100: (5-10): (0.1-0.2).
Preferably, the surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to a weight ratio of 1: (1-2): (0.2-0.5).
Preferably, the dispersant is polyaspartic acid; the chelating agent is sodium citrate, disodium ethylenediamine tetraacetate or a mixture thereof; the corrosion inhibitor is benzotriazole; the defoaming agent is an organosilicon defoaming agent.
The preparation method of the environment-friendly stainless steel cleaning agent comprises the following steps:
1. adding cyclodextrin-oxidized starch compound, a dispersing agent, a chelating agent, a corrosion inhibitor and a defoaming agent into water, and heating and uniformly stirring to obtain a mixed solution;
2. and adding a surfactant into the mixed solution, stirring and dispersing uniformly, and then adjusting the pH value to 8-9 to obtain the environment-friendly stainless steel cleaning agent.
Preferably, in the first step, the temperature of heating and stirring is 35-40 ℃.
The invention has the advantages that:
in the formula of the stainless steel cleaning agent, the cyclodextrin-oxidized starch compound is prepared from starch by an oxidant under a certain condition, oxidized starch with proper carboxyl content and moderate molecular weight is crosslinked with beta-cyclodextrin or the oxide thereof by citric acid on residual hydroxyl on the surface of the oxidized starch and hydroxyl on the surface of the cyclodextrin, and the oxidized starch is obtained under the double effects of esterification of carboxyl on the surface of the oxidized starch and hydroxyl on the surface of the cyclodextrin, and through adjustment of the dosage of reactants and reaction conditions, the cyclodextrin is loaded on the oxidized starch, so that the adsorption removal capacity of the cleaning agent on greasy dirt can be obviously improved, and a certain carboxyl is reserved, so that the cleaning agent has good dispersion performance and is beneficial to ensuring the stability of a system; the aqueous stainless steel cleaning agent is compounded with the dispersing agent polyaspartic acid, so that the dispersibility of oil stains can be improved, the cleaning effect is further improved, the high-temperature stability and the low-temperature stability of the cleaning agent can meet the use requirement, the obtained aqueous stainless steel cleaning agent has high cleaning capability and high stability, does not corrode stainless steel, and is prepared from starch-based raw materials as the main component, so that the aqueous stainless steel cleaning agent has the characteristics of environment friendliness, safety and environmental friendliness. The invention also provides a better cleaning capability than the existing acidic cleaning agent and has high application potential on the premise of no corrosion to stainless steel, green, safe and environment-friendly through further optimizing and selecting the types and the proportion of the surfactant.
Detailed Description
Example 1
An environment-friendly stainless steel cleaning agent comprises the following components in percentage by weight: 8% of cyclodextrin-oxidized starch compound, 18% of surfactant, 4% of polyaspartic acid, 0.6% of sodium citrate, 0.1% of benzotriazole, 1.5% of Dow Corning DC-65 organosilicon defoamer and the balance of water.
The preparation method of the cyclodextrin-oxidized starch compound comprises the following steps:
(1) Adding corn starch into water, uniformly mixing to obtain starch slurry with the solid content of 15%, adjusting the pH of the slurry to 9 by using sodium hydroxide, adding sodium hypochlorite, stirring at 35 ℃ for reaction for 5 hours, adjusting the pH to be neutral, and then filtering and drying to obtain oxidized starch, wherein the dosage of the sodium hypochlorite is 1% of the weight of the corn starch;
(2) Adding oxidized starch and beta-cyclodextrin into proper amount of water, dispersing uniformly, then adding citric acid and stannous chloride, stirring at 60 ℃ for reaction for 4 hours, and then filtering and drying to obtain a cyclodextrin-oxidized starch compound, wherein the weight ratio of the oxidized starch to the beta-cyclodextrin is 100:15, the weight ratio of oxidized starch, citric acid and stannous chloride is 100:6:0.15, the weight ratio of oxidized starch to water is 1:2.
the surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to the weight ratio of 1:1.5: 0.3.
The preparation method of the environment-friendly stainless steel cleaning agent comprises the following steps:
1. adding cyclodextrin-oxidized starch compound, polyaspartic acid, sodium citrate, benzotriazole and a Dow Corning DC-65 organic silicon defoamer into water, heating and uniformly stirring at 37 ℃ to obtain a mixed solution;
2. and adding the surfactant into the mixed solution, stirring and dispersing uniformly, and then adjusting the pH value to 8.5 to obtain the environment-friendly stainless steel cleaning agent.
Example 2
An environment-friendly stainless steel cleaning agent comprises the following components in percentage by weight: 5% of cyclodextrin-oxidized starch compound, 15% of surfactant, 3% of polyaspartic acid, 0.5% of sodium citrate, 0.05% of benzotriazole, 1% of Dow Corning DC-65 organosilicon defoamer and the balance of water.
The preparation method of the cyclodextrin-oxidized starch compound comprises the following steps:
(1) Adding corn starch into water, uniformly mixing to obtain starch slurry with the solid content of 10%, regulating the pH of the slurry to 8.5 by using sodium hydroxide, then adding sodium hypochlorite, stirring at 30 ℃ for reaction for 6 hours, regulating the pH to be neutral, and then filtering and drying to obtain oxidized starch, wherein the dosage of the sodium hypochlorite is 0.5% of the weight of the corn starch;
(2) Adding oxidized starch and beta-cyclodextrin into water to be uniformly dispersed, then adding citric acid and stannous chloride, stirring and reacting for 5 hours at 50 ℃, and then filtering and drying to obtain a cyclodextrin-oxidized starch compound, wherein the weight ratio of the oxidized starch to the beta-cyclodextrin is 100:10, the weight ratio of oxidized starch, citric acid and stannous chloride is 100:5:0.1, the weight ratio of oxidized starch to water is 1:1.5.
the surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to the weight ratio of 1:1: 0.2.
The preparation method of the environment-friendly stainless steel cleaning agent is the same as that of the example 1.
Example 3
An environment-friendly stainless steel cleaning agent comprises the following components in percentage by weight: 10% of cyclodextrin-oxidized starch compound, 20% of surfactant, 5% of polyaspartic acid, 1% of sodium citrate, 0.2% of benzotriazole, 2% of Dow Corning DC-65 organosilicon defoamer and the balance of water.
The preparation method of the cyclodextrin-oxidized starch compound comprises the following steps:
(1) Adding corn starch into water, uniformly mixing to obtain starch slurry with the solid content of 20%, regulating the pH of the slurry to 10 by using sodium hydroxide, then adding sodium hypochlorite, stirring at 40 ℃ for reaction for 4 hours, regulating the pH to be neutral, and then filtering and drying to obtain oxidized starch, wherein the dosage of the sodium hypochlorite is 2% of the weight of the corn starch;
(2) Adding oxidized starch and beta-cyclodextrin into water to be uniformly dispersed, then adding citric acid and stannous chloride, stirring at 80 ℃ for reaction for 2 hours, and then filtering and drying to obtain a cyclodextrin-oxidized starch compound, wherein the weight ratio of the oxidized starch to the beta-cyclodextrin is 100:20, the weight ratio of oxidized starch, citric acid and stannous chloride is 100:10:0.2, the weight ratio of oxidized starch to water is 1:3.
the surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to the weight ratio of 1:2: 0.5.
The preparation method of the environment-friendly stainless steel cleaning agent is the same as that of the example 1.
Comparative example 1
Comparative example 1 is a conventional acidic stainless steel cleaner comprising the following components in percentage by weight:
15% of sulfuric acid, 18% of oxalic acid, 1% of hydrofluoric acid, 0P-102% of surfactant, 65011.5% of surfactant, 0.5% of defoamer and the balance of water.
Comparative example 2
Comparative example 2 differs from example 1 only in that: the cyclodextrin-oxidized starch compound is replaced by oxidized starch, and the method is concretely as follows:
an environment-friendly stainless steel cleaning agent comprises the following components in percentage by weight: 8% of oxidized starch, 18% of surfactant, 4% of polyaspartic acid, 0.6% of sodium citrate, 0.1% of benzotriazole, 1.5% of Dow Corning DC-65 organosilicon defoamer and the balance of water.
The preparation method of the oxidized starch comprises the following steps:
adding corn starch into water, mixing uniformly to obtain starch slurry with solid content of 15%, regulating pH of the slurry to 9 by sodium hydroxide, adding sodium hypochlorite, stirring at 35 ℃ for reaction for 5 hours, regulating pH to neutrality, filtering, and drying to obtain oxidized starch, wherein the dosage of the sodium hypochlorite is 1% of the weight of the corn starch.
The surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to the weight ratio of 1:1.5: 0.3.
The preparation method of the environment-friendly stainless steel cleaning agent comprises the following steps:
1. adding oxidized starch, polyaspartic acid, sodium citrate, benzotriazole and a Dow Corning DC-65 organosilicon defoamer into water, heating and stirring uniformly at 37 ℃ to obtain a mixed solution;
2. and adding the surfactant into the mixed solution, stirring and dispersing uniformly, and then adjusting the pH value to 8.5 to obtain the environment-friendly stainless steel cleaning agent.
Comparative example 3
Comparative example 3 differs from example 1 only in that: the dispersant polyaspartic acid is not contained.
Test examples
The stainless steel cleaners of examples 1-2 and comparative examples 1-3 were tested for their detergency, corrosiveness, rinsing ability and high and low temperature stability on stainless steel test pieces, with reference to the GB/T35759 standard. The test results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the stainless steel cleaning agent provided by the invention has better greasy dirt cleaning capability than the existing acidic cleaning agent, is free from corrosiveness, is easy to rinse clean, has good stability, is water-based, environment-friendly and stable in performance, and has an excellent greasy dirt cleaning effect.
Claims (3)
1. The environment-friendly stainless steel cleaning agent is characterized by comprising the following components in percentage by weight: 5-10% of cyclodextrin-oxidized starch compound, 15-20% of surfactant, 3-5% of dispersing agent, 0.5-1% of chelating agent, 0.05-0.2% of corrosion inhibitor, 1-2% of defoaming agent and the balance of water;
the preparation method of the cyclodextrin-oxidized starch compound comprises the following steps:
(1) Adding starch into water, mixing uniformly to obtain starch slurry with solid content of 10-20%, regulating pH of the slurry to 8.5-10 with sodium hydroxide, adding oxidant, stirring at 30-40deg.C for reaction for 4-6 hr, regulating pH to neutrality, filtering, and drying to obtain oxidized starch;
(2) Adding the oxidized starch and beta-cyclodextrin or the derivative thereof into a proper amount of water, dispersing uniformly, then adding citric acid and stannous chloride, stirring at 50-80 ℃ for reacting for 2-5 hours, and then filtering and drying to obtain a cyclodextrin-oxidized starch compound;
the consumption of the oxidant is 0.5-2% of the weight of the starch; the oxidant is one or a mixture of more of potassium permanganate, sodium hypochlorite and hydrogen peroxide;
the weight ratio of the oxidized starch to the beta-cyclodextrin or the derivative thereof is 100: (10-20); the starch is one or more of corn starch, wheat starch and tapioca starch; the derivative of the beta-cyclodextrin is one or a mixture of more of hydroxypropyl-beta-cyclodextrin, carboxymethyl-beta-cyclodextrin and methyl-beta-cyclodextrin;
the weight ratio of the oxidized starch to the citric acid to the stannous chloride is 100: (5-10): (0.1-0.2);
the surfactant is prepared from sodium dodecyl benzene sulfonate, triethanolamine oleate and tristyrylphenol polyoxyethylene ether according to the weight ratio of 1: (1-2): (0.2-0.5);
the dispersing agent is polyaspartic acid; the chelating agent is sodium citrate, disodium ethylenediamine tetraacetate or a mixture thereof; the corrosion inhibitor is benzotriazole; the defoaming agent is an organosilicon defoaming agent.
2. The method for preparing the environment-friendly stainless steel cleaning agent as claimed in claim 1, which is characterized by comprising the following steps:
1. adding cyclodextrin-oxidized starch compound, a dispersing agent, a chelating agent, a corrosion inhibitor and a defoaming agent into water, and heating and uniformly stirring to obtain a mixed solution;
2. and adding a surfactant into the mixed solution, stirring and dispersing uniformly, and then adjusting the pH value to 8-9 to obtain the environment-friendly stainless steel cleaning agent.
3. The method for preparing an environment-friendly stainless steel cleaning agent according to claim 2, wherein in the first step, the temperature of heating and stirring is 35-40 ℃.
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