CN115926903B - Stable plastic yellowing-removing agent and preparation method thereof - Google Patents
Stable plastic yellowing-removing agent and preparation method thereof Download PDFInfo
- Publication number
- CN115926903B CN115926903B CN202211697225.8A CN202211697225A CN115926903B CN 115926903 B CN115926903 B CN 115926903B CN 202211697225 A CN202211697225 A CN 202211697225A CN 115926903 B CN115926903 B CN 115926903B
- Authority
- CN
- China
- Prior art keywords
- hydrogen peroxide
- carbomer
- yellowing agent
- water
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 34
- 239000004033 plastic Substances 0.000 title claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000004383 yellowing Methods 0.000 claims abstract description 27
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 229940049638 carbomer homopolymer type c Drugs 0.000 claims description 16
- 229940043234 carbomer-940 Drugs 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 9
- 229920002125 Sokalan® Polymers 0.000 abstract description 9
- 229960001631 carbomer Drugs 0.000 abstract description 9
- 238000004061 bleaching Methods 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 238000006303 photolysis reaction Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 9
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 9
- 235000019345 sodium thiosulphate Nutrition 0.000 description 9
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Substances [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 7
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 6
- 229910052740 iodine Inorganic materials 0.000 description 6
- 239000011630 iodine Substances 0.000 description 6
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 6
- 235000011187 glycerol Nutrition 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000012086 standard solution Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004448 titration Methods 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000008233 hard water Substances 0.000 description 2
- -1 hydrogen peroxide anions Chemical class 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 241001411320 Eriogonum inflatum Species 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- PODWXQQNRWNDGD-UHFFFAOYSA-L sodium thiosulfate pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].[O-]S([S-])(=O)=O PODWXQQNRWNDGD-UHFFFAOYSA-L 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Detergent Compositions (AREA)
Abstract
The stable plastic yellowing agent is characterized by comprising the following components in percentage by mass: 48% deionized water, 48% hydrogen peroxide, 2% glycerol and 2% carbomer. The carbomer is added in the system, so that the photodecomposition rate of hydrogen peroxide can be reduced, and the bleaching performance of the plastic yellowing agent is effectively ensured; due to the reduction of the decomposition rate of the hydrogen peroxide, the generation of oxygen is reduced, and the phenomenon that a container for containing the plastic yellowing agent bulges is avoided.
Description
Technical Field
The invention relates to a stable plastic yellowing-removing agent and a preparation method thereof
Background
When the plastic product is yellowing, the yellowing part of the plastic product is soaked in bleaching water containing hydrogen peroxide for a period of time, and the original brand-new white color can be recovered after washing and drying. The hydrogen peroxide can be decomposed into hydrogen peroxide anions, and the hydrogen peroxide anions cause the oxidation of conjugated double bonds of chromophores of pigments to be destroyed, so that the bleaching effect is achieved; therefore, hydrogen peroxide is often used for preparing main raw material components of the plastic yellowing agent.
The Chinese patent publication No. CN101372649B discloses an acidic bathroom plastic yellowing agent which is prepared by using hydrogen peroxide and a surfactant, but has the following problems:
Because covalent bonds between hydrogen peroxide atoms are unstable, when the plastic yellowing agent is not preserved in a dark place or is subjected to visible light in the transportation process, the hydrogen peroxide is broken by the covalent bonds to decompose oxygen, the chemical formula of the decomposition is 2H2O2=2H2O+O2, the bleaching performance of the decomposed hydrogen peroxide is reduced, and a container (refer to a container which is easy to deform such as plastic) for filling the plastic yellowing agent is bulged.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a stable plastic yellowing agent and a preparation method thereof.
The technical scheme adopted by the embodiment of the invention for solving the technical problems is as follows:
the stable plastic yellowing agent is characterized by comprising the following components in percentage by mass: 48% deionized water, 48% hydrogen peroxide, 2% glycerol and 2% carbomer.
Preferably, the process for preparing the plastic yellowing agent comprises the following steps: adding deionized water into a reaction container, and slowly stirring to add carbomer (the stirring speed is changed according to the carbomer adding speed so that the carbomer adding into water does not generate caking phenomenon); after the carbomer is uniformly dispersed in water, adding hydrogen peroxide, glycerol and the like, uniformly stirring, and discharging to obtain the plastic yellowing agent.
The invention has the beneficial effects that:
The carbomer is added in the system, so that the photodecomposition rate of hydrogen peroxide can be reduced, and the bleaching performance of the plastic yellowing agent is effectively ensured; due to the reduction of the decomposition rate of the hydrogen peroxide, the generation of oxygen is reduced, and the phenomenon that a container for containing the plastic yellowing agent bulges is avoided.
Detailed Description
Embodiments of the present invention are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout.
The components shown in the "connected" are described in the specification in a "connected" relationship with each other, and can be understood as fixedly connected or detachably connected or integrally formed; the connection can be direct connection or connection through an intermediate medium, and a person skilled in the art can understand the connection relation according to specific situations to obtain a screw connection or riveting or welding or clamping or embedding and other modes to replace the modes in different embodiments in a proper mode.
The orientation shown in the terms of upper, lower, left, right, top, bottom, etc. described in this specification may be directly contacted or contacted by additional features between them; such as directly above and obliquely above, or it merely represents above the other; other orientations may be understood by analogy.
The materials for manufacturing the components with the solid shapes shown in the specification can be metal materials or nonmetal materials or other composite materials; the machining process adopted for the parts with solid shapes can be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, milling, three-dimensional printing, machining and the like; those skilled in the art can adaptively select or combine according to different processing conditions, costs and precision, but are not limited to the above materials and manufacturing processes.
The distribution ratios of the respective groups of example 1 and comparative examples 1 to 2 are shown in Table 1
TABLE 1 component proportioning table
| Component (A) | Example 1 | Comparative example 1 | Comparative example 2 |
| Deionized water | 48 | 52 | 50 |
| Hydrogen peroxide | 48 | 48 | 48 |
| Glycerol | 2 | - | - |
| Carbomer 940 | 2 | - | 2 |
The total mass of the raw material components in the above example 1 was calculated as 100 g.
The preparation process of example 1 is as follows:
adding deionized water into a reaction container, and slowly stirring and adding carbomer 940 (the stirring speed is changed according to the adding of carbomer 940, so that the carbomer 940 does not agglomerate when added into water); after stirring carbomer 940 is uniformly dispersed in water, adding hydrogen peroxide, glycerol and the like, uniformly stirring, and discharging to obtain the plastic yellowing agent.
The preparation process of comparative example 1 is as follows:
adding deionized water into a reaction vessel, adding hydrogen peroxide, stirring uniformly, and discharging.
The preparation process of comparative example 2 is as follows:
adding deionized water into a reaction vessel, slowly stirring and adding carbomer (the stirring speed is changed according to the change of adding carbomer 940, so that the carbomer 940 is added into water and does not generate caking phenomenon), adding hydrogen peroxide and stirring uniformly after the carbomer 940 is uniformly dispersed in water, and discharging to obtain the plastic yellowing agent.
Hydrogen peroxide decomposition rate experiment
100Ml of hydrogen peroxide with the density of 1.197 is measured in a volumetric flask with the volume of 1 liter, water is added for dilution to the scale, shaking is carried out uniformly, the density is calibrated by a densitometer, and the flask is filled in a brown bottle for standby.
Preparation of 0.1mol/l sodium thiosulfate standard solution
25G of analytically pure sodium thiosulfate (Na2S2O3.5H2O) are weighed and dissolved in 1 liter of freshly boiled and cooled distilled water added with 0.1g of anhydrous sodium carbonate, stirred to dissolve, transferred into a dark flask for storage, and the flask mouth is closed with a plug for calibration.
And (3) calibrating: the analytically pure potassium dichromate is placed in an oven at 120-125 ℃ for baking for 1 hour, 0.1g is weighed after cooling, the mixture is placed in a 300ml iodine measuring flask, 50ml of water is added, 20 ml of 10% KI solution and 5ml of 6N HCL solution are added, the mixture is fully shaken and mixed, the bottle stopper is covered, the mixture is placed in a dark place for 5 minutes, iodine is fully separated out, and 100ml of water is added for dilution and shaking. Then, a Na2S2O3 solution was dropped from a burette, the solution was titrated until the solution became pale yellow (this means that only a small amount of iodine remained), 3-5 ml of a starch solution was added, and the titration was continued with the same Na2S2O3 until blue was disappeared and the color became green of trivalent Cr3+, and the amount was recorded and calculated.
N Na2S2O3＝0.1
V×0.04904
Na2s2o3- -sodium thiosulfate concentration as desired
V- -the consumption of undetermined concentration of sodium thiosulfate in ml
0.1- -Amount of calibrator potassium dichromate
0.04904 Milliequivalents of potassium dichromate
Experimental procedure
(1) 2.5G of the sample was weighed in a beaker (3 days of sunlight irradiation outside the chamber before the sample test), dissolved in a 250ml volumetric flask with the prepared hard water, and then moved to 25ml of sodium hydroxide solution (to make the alkali concentration 5 g/l) near the scale (about 170 ml), 25ml of hydrogen peroxide solution, 5ml of ferric ion solution, diluted to the scale with the prepared hard water, and shaken well.
(2) Taking 50ml to 250ml of the solution in the step (1), tightly binding the bottle mouth by plastic paper (note that a plurality of layers of plastic paper are put to avoid air leakage in the cooking process), putting the bottle mouth into a boiling water bath for heating for 30 minutes (note that water is continuously reduced in the boiling process, water is required to be continuously added into a pot to prevent the water from being burnt out, the plastic paper of the conical bottle mouth cannot leak air), taking out, immediately cooling to room temperature by tap water, taking out 5ml of the solution by a pipette, placing the solution into an iodine measuring bottle, adding 5ml of sulfuric acid solution and 2g of potassium iodide, sealing the solution by water, standing in a dark place for 15 minutes (note that three iodine measuring bottles are taken under the same condition for comparison and error reduction), adding 100ml of distilled water after the reaction, titrating by using a sodium thiosulfate standard solution, adding starch as an indicator when the solution is in the end point (the color of the solution becomes light yellow) and then continuing titrating until the solution is colorless, and recording the volume is Vml.
(3) The blank test is carried out, 10ML of hydrogen peroxide is removed, distilled water is used for constant volume into a volumetric flask with 100ML, 5ML of hydrogen peroxide is removed into a clean iodine volumetric flask by shaking, 5ML of sulfuric acid solution and about 2g of potassium iodide are added, water sealing is used for reaction for 15 minutes in the dark, 100ML of distilled water is added after the reaction is finished, titration is carried out by using a sodium thiosulfate standard solution, and the volume V0ML is recorded.
(4) Attention is paid to the titration by a burette:
① Before use, checking whether liquid leakage occurs
② When the burette is used for taking the drip liquid, the drip liquid must be washed and moistened first
③ Before reading, bubble in the tube is completely removed, and the tip is filled with liquid
④ During reading, the lowest point of the concave surface of the sight line, the scale and the liquid level is calculated on the same horizontal line (5) according to the analysis result
The hydrogen peroxide decomposition rate is calculated according to the following formula:
V 0 - -blank consumed sodium thiosulfate standard solution volume ml
V- -sodium thiosulfate standard solution volume consumed by sample ml
Dissolving solution
X- -hydrogen peroxide decomposition rate
The test data are shown in the following table:
| Sample of | V0(ml) | V(ml) | X(％) |
| Example 1 | 20.3 | 18.5 | 8.86 |
| Comparative example 1 | 20.3 | 14.7 | 27.58 |
| Comparative example 2 | 20.3 | 17.1 | 15.76 |
The experimental data result shows that the decomposition rate of hydrogen peroxide is highest and reaches 27.58% in the experimental result of the plastic yellowing agent prepared by the comparative example 1 without carbomer 940; in contrast, in the plastic yellowing agent prepared by adding carbomer 940 in the comparative example 2, the decomposition rate of hydrogen peroxide is 15.76% in the test process, and in the plastic yellowing agent prepared by adding carbomer 940, glycerin and other raw material components in the embodiment 1, the decomposition rate of hydrogen peroxide is only 8.86%, and experimental researches show that the plastic yellowing agent prepared by the formula can reduce the problem that the decomposition of hydrogen peroxide in the formula occurs after illumination, reduce the decomposition rate, reduce the failure rate of the plastic yellowing agent under the condition of transportation or non-light-shielding preservation, ensure the bleaching performance of the plastic yellowing agent, and prevent the bulge phenomenon of a container for containing the plastic yellowing agent.
It will be appreciated by those skilled in the art that the foregoing description is merely illustrative of the preferred embodiments of the present invention, and is not intended to limit the invention thereto, and any person who is informed of the variations of the results made in the light of the present invention falls within the scope of the present invention.
Claims (2)
1. The stable plastic yellowing agent is characterized by comprising the following components in percentage by mass: 48% deionized water, 48% hydrogen peroxide, 2% glycerol, 2% carbomer 940.
2. A process for preparing a stable plastics yellowing agent according to claim 1, comprising the steps of:
Adding deionized water into a reaction container, slowly stirring and adding carbomer 940, wherein the stirring speed is changed according to the carbomer 940, so that the carbomer 940 cannot be agglomerated when being added into water; after stirring carbomer 940 is uniformly dispersed in water, adding hydrogen peroxide and glycerol, uniformly stirring, and discharging to obtain the plastic yellowing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211697225.8A CN115926903B (en) | 2022-12-28 | 2022-12-28 | Stable plastic yellowing-removing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211697225.8A CN115926903B (en) | 2022-12-28 | 2022-12-28 | Stable plastic yellowing-removing agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115926903A CN115926903A (en) | 2023-04-07 |
| CN115926903B true CN115926903B (en) | 2024-07-23 |
Family
ID=86650744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211697225.8A Active CN115926903B (en) | 2022-12-28 | 2022-12-28 | Stable plastic yellowing-removing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115926903B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108184900A (en) * | 2018-03-27 | 2018-06-22 | 徐少锋 | A kind of disinfectant and preparation method thereof |
| KR102386504B1 (en) * | 2020-12-08 | 2022-04-15 | 대한민국 | manufacturing method of bleaching gel for cultural pottery |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066465A (en) * | 1991-05-08 | 1992-11-25 | 中国科学院生物物理研究所 | Household bleaching water |
| EP1754775A3 (en) * | 1999-08-10 | 2007-03-28 | The Procter and Gamble Company | Detergent compositions comprising hydrotropes |
| US20030036493A1 (en) * | 2001-05-01 | 2003-02-20 | The Procter & Gamble Company | Stable liquid or gel bleaching composition containing diacyl peroxide particles |
| WO2014055107A1 (en) * | 2012-10-04 | 2014-04-10 | Ecolab Usa Inc. | Pre-soak technology for laundry and other hard surface cleaning |
| CN104120045A (en) * | 2014-06-20 | 2014-10-29 | 陈啟文 | Plastic product cleanser |
| CN107683853A (en) * | 2017-08-01 | 2018-02-13 | 江苏新瑞贝科技股份有限公司 | One kind oxidation cleaning and sterilizing agent and preparation method thereof |
| CN113025047A (en) * | 2021-03-11 | 2021-06-25 | 河南瑞奇特化工有限公司 | Plastic yellowing agent, preparation method and use method thereof |
-
2022
- 2022-12-28 CN CN202211697225.8A patent/CN115926903B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108184900A (en) * | 2018-03-27 | 2018-06-22 | 徐少锋 | A kind of disinfectant and preparation method thereof |
| KR102386504B1 (en) * | 2020-12-08 | 2022-04-15 | 대한민국 | manufacturing method of bleaching gel for cultural pottery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115926903A (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bobtelsky et al. | The metallic complexes of tartrates and citrates, their structure and behavior in dilute solutions. I. The cupric and nickelous complexes | |
| CN104368290B (en) | The preparation method of titanium tetrachloride aqueous solution and device | |
| CN101913567B (en) | Calcium hypochlorite compositions and method for reducing potential of calcium hypochlorite formulation for conflagration | |
| Jaiswal et al. | Silver (III) as an oxidative titrant: determination of some sugars, carboxylic acids and inorganic ions | |
| CN115926903B (en) | Stable plastic yellowing-removing agent and preparation method thereof | |
| CN102817035B (en) | Aluminium alloy chemical polishing agent used for automatic production | |
| CN103832980A (en) | Process for producing monopersulfuric acid and monopersulfuric acid continuous production apparatus | |
| CN115363025A (en) | A kind of efficient and stable sodium hypochlorite disinfectant and preparation method thereof | |
| Ramachandran et al. | An improved spectrophotometric determination of silicate in water based on molybdenum blue | |
| CN108152444A (en) | Method for detecting content of free nitric acid in bismuth nitrate solution | |
| CN208761349U (en) | A kind of strong basicity chemical industry solutions holding vessel | |
| US5415809A (en) | Method for determination of dissolved oxygen in water | |
| CN104089958A (en) | Determination method for content of phosphorus in niobium-containing steel | |
| CN106115625A (en) | A kind of method preparing sodium hypochlorite | |
| US4357256A (en) | Sodium hydrosulfite composition | |
| CN101553427A (en) | Process for producing monopersulfuric acid and monopersulfuric acid continuous production apparatus | |
| CN204065012U (en) | A kind of electrochemical appliance measuring free residual chlorine in water | |
| JP2011247661A (en) | Method for quantifying total phosphorus | |
| Rogers et al. | The determination of small amounts of arsenic | |
| CN102180446A (en) | Production method of food-grade stabilized chlorine dioxide disinfectant | |
| CN207142846U (en) | System for the oxidation of acid chlorization aluminium system ferrous ions | |
| CN104807812A (en) | Method for detecting organic matter in organic and inorganic compound fertilizer | |
| CN106544169A (en) | Color protection and sterilization liquid laundry detergent and preparation method | |
| Goldstone et al. | Chlorometry. Titrimetric Procedure Available for Microanalysis | |
| CN111638211A (en) | Method for detecting chlorate in brine of electrolytic cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |