CN112387103A - Catechin formaldehyde scavenger and preparation method thereof - Google Patents
Catechin formaldehyde scavenger and preparation method thereof Download PDFInfo
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- CN112387103A CN112387103A CN202011330527.2A CN202011330527A CN112387103A CN 112387103 A CN112387103 A CN 112387103A CN 202011330527 A CN202011330527 A CN 202011330527A CN 112387103 A CN112387103 A CN 112387103A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 231
- ADRVNXBAWSRFAJ-UHFFFAOYSA-N catechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3ccc(O)c(O)c3 ADRVNXBAWSRFAJ-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 235000005487 catechin Nutrition 0.000 title claims abstract description 66
- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 title claims abstract description 65
- 229950001002 cianidanol Drugs 0.000 title claims abstract description 65
- 239000002516 radical scavenger Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 235000006708 antioxidants Nutrition 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 16
- XMOCLSLCDHWDHP-IUODEOHRSA-N epi-Gallocatechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@H]2O)=CC(O)=C(O)C(O)=C1 XMOCLSLCDHWDHP-IUODEOHRSA-N 0.000 claims description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- XMOCLSLCDHWDHP-UHFFFAOYSA-N L-Epigallocatechin Natural products OC1CC2=C(O)C=C(O)C=C2OC1C1=CC(O)=C(O)C(O)=C1 XMOCLSLCDHWDHP-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- PFTAWBLQPZVEMU-ZFWWWQNUSA-N (+)-epicatechin Natural products C1([C@@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-ZFWWWQNUSA-N 0.000 claims description 7
- PFTAWBLQPZVEMU-UKRRQHHQSA-N (-)-epicatechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-UKRRQHHQSA-N 0.000 claims description 7
- LPTRNLNOHUVQMS-UHFFFAOYSA-N epicatechin Natural products Cc1cc(O)cc2OC(C(O)Cc12)c1ccc(O)c(O)c1 LPTRNLNOHUVQMS-UHFFFAOYSA-N 0.000 claims description 7
- 235000012734 epicatechin Nutrition 0.000 claims description 7
- COVFEVWNJUOYRL-UHFFFAOYSA-M digallate Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C([O-])=O)O)=C1 COVFEVWNJUOYRL-UHFFFAOYSA-M 0.000 claims description 6
- 229960002089 ferrous chloride Drugs 0.000 claims description 6
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 6
- DZYNKLUGCOSVKS-UHFFFAOYSA-N epigallocatechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3cc(O)c(O)c(O)c3 DZYNKLUGCOSVKS-UHFFFAOYSA-N 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 4
- 235000015165 citric acid Nutrition 0.000 claims description 4
- 239000011975 tartaric acid Substances 0.000 claims description 4
- 235000002906 tartaric acid Nutrition 0.000 claims description 4
- 241001122767 Theaceae Species 0.000 claims description 3
- 235000011054 acetic acid Nutrition 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 239000004310 lactic acid Substances 0.000 claims description 3
- 235000014655 lactic acid Nutrition 0.000 claims description 3
- LSHVYAFMTMFKBA-TZIWHRDSSA-N (-)-epicatechin-3-O-gallate Chemical compound O([C@@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=CC=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 LSHVYAFMTMFKBA-TZIWHRDSSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- 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 2
- LSHVYAFMTMFKBA-UHFFFAOYSA-N ECG Natural products C=1C=C(O)C(O)=CC=1C1OC2=CC(O)=CC(O)=C2CC1OC(=O)C1=CC(O)=C(O)C(O)=C1 LSHVYAFMTMFKBA-UHFFFAOYSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 235000007715 potassium iodide Nutrition 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 3
- WMBWREPUVVBILR-UHFFFAOYSA-N GCG Natural products C=1C(O)=C(O)C(O)=CC=1C1OC2=CC(O)=CC(O)=C2CC1OC(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-UHFFFAOYSA-N 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- WMBWREPUVVBILR-WIYYLYMNSA-N (-)-Epigallocatechin-3-o-gallate Chemical compound O([C@@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=C(O)C=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-WIYYLYMNSA-N 0.000 description 5
- 229940030275 epigallocatechin gallate Drugs 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 208000006083 Hypokinesia Diseases 0.000 description 1
- 206010024264 Lethargy Diseases 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 206010070863 Toxicity to various agents Diseases 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 208000022531 anorexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001765 catechin Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 206010061428 decreased appetite Diseases 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 238000007336 electrophilic substitution reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009978 visual deterioration Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention relates to a catechin formaldehyde scavenger and a preparation method thereof, belonging to the technical field of indoor purification and formaldehyde removal. The invention discloses a catechin formaldehyde scavenger which comprises the following raw materials, by weight, 2-15 parts of catechin, 1-15 parts of an acid regulator, 0.1-2 parts of an antioxidant and 60-100 parts of water. The invention also discloses a preparation method of the catechin formaldehyde scavenger, which comprises the following steps of: adding catechin and antioxidant into water, stirring thoroughly and mixing well; and step two, adding an acid regulator to regulate the pH value, and uniformly stirring to obtain the catechin formaldehyde scavenger. The formaldehyde remover disclosed by the invention is simple and environment-friendly in preparation process, obvious in formaldehyde removing effect, environment-friendly and easily available in formula components, simple and practical in use process, and very suitable for removing formaldehyde indoors, and the formaldehyde remover can be directly sprayed to places needing formaldehyde removal.
Description
Technical Field
The invention relates to a catechin formaldehyde scavenger and a preparation method thereof, belonging to the technical field of indoor purification and formaldehyde removal.
Background
The indoor formaldehyde mainly comes from decoration paint, artificial boards, furniture, carpets and the like, the materials contain a large amount of urea-formaldehyde resin, phenolic resin, melamine formaldehyde resin and the like, the resins can be slowly decomposed to release formaldehyde in the use process, the release period is as long as 3-15 years, and the long-term pollution to indoor air is caused. The long-term exposure to low-concentration formaldehyde can cause the injuries of the nervous system, the immune system, the respiratory system and the liver of a human body, and toxic symptoms such as dizziness, hypodynamia, lethargy, anorexia, visual deterioration and the like can occur, and cancers and leukemia can also be caused. The World Health Organization (WHO) and the international agency for research on cancer (IARC) have identified formaldehyde as a carcinogen in humans because of its current carcinogenic data. Therefore, the treatment of indoor formaldehyde is a big prerequisite for ensuring human health.
At present, the indoor air formaldehyde removal and purification technologies are various, such as an adsorption method, a catalytic oxidation method, a plasma technology and the like. The adsorption method is simple and easy to use, but has the problems of poor adsorption effect and easy desorption after adsorption aiming at the micromolecule adsorption method of formaldehyde, thereby causing secondary pollution; the catalytic oxidation method has a lot of byproducts, can not completely convert the formaldehyde into water and carbon dioxide, and some catalysts are expensive and are not suitable for removing the formaldehyde in families and small-scale rooms; the formaldehyde removal by the plasma technology needs to be carried out under high pressure, and the effect of removing low-concentration formaldehyde is not ideal. Therefore, the development trend of the formaldehyde treatment technology which is green, environment-friendly, efficient and safe is in the future.
Disclosure of Invention
The invention provides a green and environment-friendly catechin formaldehyde scavenger and a preparation method thereof, aiming at the problems in the prior art, the catechin is taken as a main active component, and the formaldehyde scavenger can be directly sprayed on a place needing to be treated so as to achieve the purpose of removing formaldehyde.
The technical scheme for solving the technical problems is as follows: a catechin formaldehyde scavenger comprises the following raw materials in parts by weight:
2-15 parts of catechin, 1-15 parts of an acid regulator, 0.1-2 parts of an antioxidant and 60-100 parts of water.
The invention has the beneficial effects that:
1. in the catechin formaldehyde scavenger provided by the invention, the catechin which is an active component for removing formaldehyde is a plant extract with a plurality of phenolic hydroxyl groupsBecause C-6 site and C-8 site in catechin are nucleophilic active centre, it is easy to produce electrophilic substitution reaction with formaldehyde, and utilizes methylene bridge bond (-CH)2-) makes polyphenol molecules cross-linked to generate macromolecular substances, thereby achieving the purpose of removing free formaldehyde in the air; the catechin is rich in source, green and environment-friendly, and low in price, and can greatly reduce the cost for removing formaldehyde;
2. the catechin formaldehyde scavenger provided by the invention is prepared from catechin, an acid regulator, an antioxidant and water, and has simple formula components, food-grade or food additive-grade raw materials, safety and no toxicity; the formaldehyde removing effect on different concentrations is remarkable, the formaldehyde removing rate is related to the content of catechin, and the formaldehyde removing rate can reach 90 percent at most;
3. the acid regulator adopted by the invention provides an acid environment for removing formaldehyde, is more favorable for the reaction between catechin and formaldehyde, and improves the formaldehyde removal efficiency; on the other hand, the antioxidant capacity of the catechin can be promoted to be enhanced;
4. the invention adopts the antioxidant, can effectively solve the problem that catechin is easy to oxidize, ensures higher catechin content and ensures effective formaldehyde removal.
On the basis of the technical scheme, the invention can also make the following improvements on the technical scheme:
further, the catechin is one or more selected from Epicatechin (EC), Epicatechin Gallate (EGC), epigallocatechin gallate (EGCG), Epigallocatechin (ECG), epicatechin digallate, and epigallocatechin digallate.
Further, the catechins are directly extracted from fresh tea leaves.
The fresh tea has multiple active components, so that the catechin has higher activity and is easier to react with formaldehyde.
Further, the acidity regulator is one or more aqueous solutions of tartaric acid, citric acid, lactic acid, acetic acid, sulfuric acid, hydrochloric acid and malic acid.
Further, the acidity regulator regulates the pH value of the catechin formaldehyde scavenger to 2.0-6.0.
Further, the antioxidant reagent is one or more of potassium iodide, sodium thiosulfate, ferrous sulfate and ferrous chloride.
Further, the water is deionized water.
The invention also discloses a preparation method of the catechin formaldehyde scavenger, which comprises the following steps:
step one, mixing: adding catechin and an antioxidant into water, and fully and uniformly stirring and mixing in a vacuum stirring kettle until a completely transparent clear solution is formed;
and step two, adding an acidic regulator into the solution obtained in the step one to regulate the pH value, and uniformly stirring to obtain the catechin formaldehyde scavenger.
Further, the reaction temperature of the first step is 30-60 ℃.
The invention has the advantages that:
the preparation process of the catechin formaldehyde scavenger is simple and environment-friendly, the formaldehyde removing effect is obvious, substances harmful to human bodies do not exist in the formaldehyde removing process, the formula components are green and environment-friendly and are easy to obtain, the use process is simple and practical, the catechin formaldehyde scavenger can be directly sprayed to places needing formaldehyde removal, and the catechin formaldehyde scavenger is very suitable for indoor formaldehyde removal.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention. The reagents used in the following examples were all commercially available chemically pure reagents.
Example 1
Adding 2g of EC powder with the purity of 90%, 0.1g of ferrous chloride for preventing oxidation of catechin and 97.9g of deionized water into a vacuum reaction kettle, heating to 40 ℃, stirring for 30 minutes at the rotating speed of 500rpm until the EC powder and the ferrous chloride are completely dissolved, then adding tartaric acid to adjust the pH value to 3.0, stirring for 3-5 minutes at the rotating speed of 300rpm, and uniformly mixing the solution to obtain a solution with the catechin content of 2%, namely obtaining the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has the removal rate of indoor formaldehyde of 65.4 percent through tests.
Example 2
Adding 7g of 95% purity EGC powder, 0.1g of sodium thiosulfate for preventing oxidation of catechin and 92.9g of deionized water into a vacuum reaction kettle, heating to 45 ℃, stirring at a rotating speed of 500rpm for 30 minutes until the EGC powder and the sodium thiosulfate are completely dissolved, then adding citric acid to adjust the pH value to 4.0, and stirring at a rotating speed of 300rpm for 3-5 minutes to uniformly mix the solution to obtain a solution with the catechin content of 7%, thus obtaining the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has a removal rate of 72.8% to indoor formaldehyde through tests.
Example 3
Adding 10g of EGCG powder with the purity of 95%, 0.2g of sodium thiosulfate for preventing oxidation of catechin and 89.8g of deionized water into a vacuum reaction kettle, heating to 50 ℃, stirring for 30 minutes at the rotating speed of 500rpm until the EGCG powder and the deionized water are completely dissolved, then adding lactic acid to adjust the pH value to 3.0, and stirring for 3-5 minutes at the rotating speed of 300rpm until the solutions are uniformly mixed to obtain a solution with the catechin content of 10%, thus obtaining the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has the removal rate of indoor formaldehyde of 85 percent through tests.
Example 4
Adding 5g of ECG powder with the purity of 95%, 5g of EGC powder, 0.3g of ferrous chloride for preventing oxidation of catechin and 84.7g of deionized water into a vacuum reaction kettle, heating to 50 ℃, stirring for 30 minutes at the rotating speed of 500rpm until the two are completely dissolved, then adding acetic acid to adjust the pH value to 4.0, stirring for 3-5 minutes at 300rpm, and uniformly mixing the solution to obtain a solution with the catechin content of 10%, namely the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has the removal rate of indoor formaldehyde of 78.9 percent through tests.
Example 5
Adding 8g of catechin digallate with the purity of 90%, 0.1g of ferrous sulfate for preventing oxidation of catechin and 91.9g of deionized water into a vacuum reaction kettle, heating to 50 ℃, stirring for 30 minutes at the rotating speed of 500rpm until the two are completely dissolved, then adding tartaric acid to adjust the pH value to 5.0, stirring for 3-5 minutes at the rotating speed of 300rpm, and uniformly mixing the solution to obtain a solution with the catechin content of 8%, namely obtaining the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has the removal rate of indoor formaldehyde of 80 percent through tests.
Example 6
Adding 7g of epigallocatechin digallate with the purity of 95%, 8g of EGCG powder, 0.3g of ferrous chloride for preventing catechin oxidation and 84.7g of deionized water into a vacuum reaction kettle, heating to 50 ℃, stirring for 30 minutes at the rotating speed of 500rpm until the two are completely dissolved, then adding citric acid to adjust the pH value to 5.0, stirring for 3-5 minutes at the rotating speed of 300rpm, and uniformly mixing the solution to obtain a solution with the catechin content of 15%, namely the catechin formaldehyde scavenger.
According to the test method specified in the national standard GB/T35239-2017, the formaldehyde scavenger prepared in the embodiment has a removal rate of 90% for indoor formaldehyde through tests.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The catechin formaldehyde scavenger is characterized by comprising the following raw materials in parts by weight:
2-15 parts of catechin, 1-15 parts of an acid regulator, 0.1-2 parts of an antioxidant and 60-100 parts of water.
2. The catechin formaldehyde scavenger according to claim 1, wherein the catechin is one or more of epicatechin, epicatechin gallate, epigallocatechin, epicatechin digallate, and epigallocatechin digallate.
3. The catechin formaldehyde scavenger according to claim 1 or 2, wherein the catechin is extracted directly from fresh tea leaves.
4. The catechin formaldehyde scavenger according to claim 1, wherein the acidity regulator is an aqueous solution of one or more of tartaric acid, citric acid, lactic acid, acetic acid, sulfuric acid, hydrochloric acid, and malic acid.
5. The catechin formaldehyde scavenger according to claim 4, wherein the acidic regulator regulates the pH of the catechin formaldehyde scavenger to 2.0-6.0.
6. The catechin formaldehyde scavenger according to claim 1, wherein the antioxidant is one or more of potassium iodide, sodium thiosulfate, ferrous sulfate and ferrous chloride.
7. A method for preparing a catechin formaldehyde scavenger according to any one of claims 1 to 6, comprising the steps of:
step one, mixing: adding catechin and an antioxidant into water, and fully and uniformly stirring and mixing in a vacuum stirring kettle until a completely transparent clear solution is formed;
and step two, adding an acidic regulator into the solution obtained in the step one to regulate the pH value, and uniformly stirring to obtain the catechin formaldehyde scavenger.
8. The method according to claim 7, wherein the reaction temperature in the first step is 30 to 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011330527.2A CN112387103A (en) | 2020-11-24 | 2020-11-24 | Catechin formaldehyde scavenger and preparation method thereof |
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