CN113856443A - Efficient and environment-friendly formaldehyde cleaning agent and preparation method thereof - Google Patents
Efficient and environment-friendly formaldehyde cleaning agent and preparation method thereof Download PDFInfo
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- CN113856443A CN113856443A CN202111254363.4A CN202111254363A CN113856443A CN 113856443 A CN113856443 A CN 113856443A CN 202111254363 A CN202111254363 A CN 202111254363A CN 113856443 A CN113856443 A CN 113856443A
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- formaldehyde
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- acetylacetone
- acetic acid
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000012459 cleaning agent Substances 0.000 title abstract description 14
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims abstract description 34
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 32
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229960000583 acetic acid Drugs 0.000 claims abstract description 16
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 16
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000005695 Ammonium acetate Substances 0.000 claims abstract description 15
- 240000000691 Houttuynia cordata Species 0.000 claims abstract description 15
- 229940043376 ammonium acetate Drugs 0.000 claims abstract description 15
- 235000019257 ammonium acetate Nutrition 0.000 claims abstract description 15
- 235000013719 Houttuynia cordata Nutrition 0.000 claims abstract description 14
- 241000334160 Isatis Species 0.000 claims abstract description 14
- 239000008367 deionised water Substances 0.000 claims abstract description 14
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 14
- 239000000706 filtrate Substances 0.000 claims abstract description 14
- 238000010992 reflux Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 244000037364 Cinnamomum aromaticum Species 0.000 claims abstract description 13
- 235000014489 Cinnamomum aromaticum Nutrition 0.000 claims abstract description 13
- 240000003085 Quassia amara Species 0.000 claims abstract description 13
- 235000009694 Quassia amara Nutrition 0.000 claims abstract description 13
- 229940013788 quassia Drugs 0.000 claims abstract description 12
- 239000006228 supernatant Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000004821 distillation Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000005360 mashing Methods 0.000 claims abstract description 6
- 238000005119 centrifugation Methods 0.000 claims description 8
- 239000003599 detergent Substances 0.000 claims description 4
- 240000004659 Picrasma quassioides Species 0.000 claims description 2
- 235000010913 Picrasma quassioides Nutrition 0.000 claims description 2
- 210000000582 semen Anatomy 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000012086 standard solution Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229930013930 alkaloid Natural products 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000758794 Asarum Species 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 235000013717 Houttuynia Nutrition 0.000 description 1
- 235000011984 Simarouba amara Nutrition 0.000 description 1
- 235000009689 Simarouba glauca Nutrition 0.000 description 1
- 206010043275 Teratogenicity Diseases 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000003797 alkaloid derivatives Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002602 strong irritant Substances 0.000 description 1
- 231100000211 teratogenicity Toxicity 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002023 wood Substances 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
- B01D2251/00—Reactants
- B01D2251/80—Organic bases or salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
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)
- Detergent Compositions (AREA)
Abstract
The invention discloses an efficient and environment-friendly formaldehyde cleaning agent, which comprises the following components in percentage by mass: 30-46% of deionized water, 2-4% of ammonium acetate, 6-12% of glacial acetic acid, 0.2-0.5% of acetylacetone, 8-10% of houttuynia cordata, 9-12% of quassia, 6-8% of isatis root, 5-8% of cassia seed and 15-20% of absolute ethyl alcohol. The preparation method comprises the steps of mixing and mashing the houttuynia cordata, the quassia, the isatis root and the cassia seed according to the proportion, then placing the mixture into a distillation flask, adding absolute ethyl alcohol, stirring at room temperature for 6-10 min, standing for 20-30 h, then heating and refluxing for 1-3 h, centrifugally separating, taking supernatant, and filtering with a microporous filter membrane to obtain filtrate for later use; and then adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 5-10 min, then adding the filtrate, refluxing for 1-2 h at 50-65 ℃, cooling, and standing to obtain the cleaning agent.
Description
Technical Field
The invention belongs to the technical field of cleaning agents, and particularly relates to a high-efficiency and environment-friendly formaldehyde cleaning agent and a preparation method thereof.
Background
Formaldehyde is one of strong teratogenicity substances recognized in medical field, is colorless, has strong irritant gas, is widely used in industries such as wood, textile, printing and the like, has high toxicity, can cause great harm to life safety and health of people in an environment containing formaldehyde in long-term life, has carcinogenicity, is only used for removing formaldehyde in indoor air, and contains formaldehyde due to the use of urea resin adhesive in various artificial boards (shaving boards, density boards, fiber boards, plywood and the like).
The main source of formaldehyde is building decoration materials, which continuously volatilize organic compounds such as formaldehyde, benzene-containing substances and the like in the using process, and once entering indoor air to be absorbed by human bodies, various health diseases can be caused. Most of the time of children, students and old people is spent indoors, so that the harm of indoor environmental pollution to human health is most direct, the harm degree is larger, the formaldehyde efficiency of the formaldehyde scavenger in the prior art is poor, and the actual demand cannot be met.
Disclosure of Invention
The invention aims to provide an efficient and environment-friendly formaldehyde cleaning agent, which comprises the following components in percentage by mass: 30-46% of deionized water, 2-4% of ammonium acetate, 6-12% of glacial acetic acid, 0.2-0.5% of acetylacetone, 8-10% of houttuynia cordata, 9-12% of quassia, 6-8% of isatis root, 5-8% of cassia seed and 15-20% of absolute ethyl alcohol.
The preparation method comprises the following steps:
s1: mixing and mashing the houttuynia cordata, the quassia, the isatis root and the cassia seed according to the proportion, then placing the mixture into a distillation flask, adding absolute ethyl alcohol, stirring for 6-10 min at room temperature, standing for 20-30 h, then heating and refluxing for 1-3 h, performing centrifugal separation, taking supernatant, and filtering with a microporous filter membrane to obtain filtrate for later use.
S2: and adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 5-10 min, adding the filtrate obtained in the step S1, refluxing for 1-2 h at 50-65 ℃, cooling, and standing to obtain the detergent.
Preferably, the centrifugation speed in the step S1 is 5000-6000 r/min, and the centrifugation time is 15-30 min.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the houttuynia cordata, the quassia, the isatis root and the cassia seed are adopted to obtain the extract under the condition that ethanol is used as a solvent, alkaloid in the extract can react with formaldehyde, so that the effect of removing formaldehyde is effectively achieved, meanwhile, ammonium acetate, glacial acetic acid and acetylacetone are used as additives, wherein the acetylacetone can react with formaldehyde in the presence of Anyang, and meanwhile, the amount of ammonium salt is limited, so that the reaction rate of the reaction can be ensured, and the effect of removing formaldehyde for a long time is achieved; in addition, the extracted alkaloids react with formaldehyde more actively, the pH value is adjusted by adding a certain amount of glacial acetic acid, and the acetylacetone reacts with the formaldehyde to produce water, so that the effect of diluting the cleaning agent is further achieved, and the cleaning agent can achieve the effect of removing the formaldehyde for a long time.
Detailed Description
The following embodiments of the present invention are described in detail, and the embodiments are implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Example 1
An efficient and environment-friendly formaldehyde cleaner comprises the following components in percentage by mass: 31.5% of deionized water, 2% of ammonium acetate, 10% of glacial acetic acid, 0.5% of acetylacetone, 10% of houttuynia cordata, 12% of quassia, 8% of isatis root, 6% of cassia seed and 20% of absolute ethyl alcohol.
The preparation method comprises the following steps:
s1: mixing and mashing houttuynia cordata, quassia, isatis root and cassia seed according to the proportion, then placing into a distillation flask, adding absolute ethyl alcohol, stirring at room temperature for 6min, standing for 20h, then heating and refluxing for 1h, centrifuging, taking supernatant, and filtering with a microporous filter membrane, wherein the centrifugation rate is 5000r/min, and the centrifugation time is 15min, thus obtaining filtrate for later use.
S2: and then adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 5min, then adding the filtrate obtained in the step S1, refluxing for 1h at 50 ℃, cooling, and standing to obtain the cleaning agent.
Example 2
An efficient and environment-friendly formaldehyde cleaner specifically comprises the following steps:
an efficient and environment-friendly formaldehyde cleaner comprises the following components in percentage by mass: 34.5% of deionized water, 3% of ammonium acetate, 12% of glacial acetic acid, 0.5% of acetylacetone, 10% of houttuynia cordata, 10% of quassia, 7% of isatis root, 8% of cassia seed and 15% of absolute ethyl alcohol.
The preparation method comprises the following steps:
s1: mixing and mashing houttuynia cordata, quassia, isatis root and cassia seed according to the proportion, then placing into a distillation flask, adding absolute ethyl alcohol, stirring at room temperature for 10min, standing for 30h, then heating and refluxing for 3h, centrifuging, taking supernatant, and filtering with a microporous filter membrane, wherein the centrifugation rate is 6000r/min, and the centrifugation time is 30min, thus obtaining filtrate for later use.
S2: and then adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 10min, then adding the filtrate obtained in the step S1, refluxing for 2h at 65 ℃, cooling and standing to obtain the cleaning agent.
Example 3
An efficient and environment-friendly formaldehyde cleaner specifically comprises the following steps:
an efficient and environment-friendly formaldehyde cleaner comprises the following components in percentage by mass: 31.8% of deionized water, 4% of ammonium acetate, 10% of glacial acetic acid, 0.2% of acetylacetone, 10% of houttuynia cordata, 10% of quassia, 8% of isatis root, 8% of cassia seed and 18% of absolute ethyl alcohol.
The preparation method comprises the following steps:
s1: mixing and smashing heartleaf houttuynia herb, bitter wood, indigowoad root and cassia seed according to the proportion, then putting into a distillation flask, adding absolute ethyl alcohol, stirring for 8min at room temperature, standing for 25h, then heating and refluxing for 1-3 h, centrifugally separating, taking supernatant, and filtering by using a microporous filter membrane, wherein the centrifugal rate is 5800r/min, and the centrifugal time is 20min, thus obtaining filtrate for later use.
S2: and then adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 8min, then adding the filtrate obtained in the step S1, refluxing for 1.5h at 55 ℃, cooling, and standing to obtain the cleaning agent.
Example 4
An efficient and environment-friendly formaldehyde cleaner specifically comprises the following steps:
an efficient and environment-friendly formaldehyde cleaner comprises the following components in percentage by mass: 43.6% of deionized water, 3% of ammonium acetate, 8% of glacial acetic acid, 0.4% of acetylacetone, 8% of houttuynia cordata, 9% of quassia, 8% of isatis root, 5% of cassia seed and 15% of absolute ethyl alcohol.
The preparation method comprises the following steps:
s1: mixing and mashing houttuynia cordata, picrasma quassioides, isatis root and semen cassiae according to the proportion, then placing the mixture into a distillation flask, adding absolute ethyl alcohol, stirring the mixture for 10min at room temperature, standing the mixture for 30h, then heating and refluxing the mixture for 1-3 h, centrifugally separating, taking supernatant, and filtering the supernatant by using a microporous filter membrane, wherein the centrifugal rate is 5600r/min, and the centrifugal time is 25min, thus obtaining filtrate for later use.
S2: and then adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 9min, then adding the filtrate obtained in the step S1, refluxing for 2h at 60 ℃, cooling, and standing to obtain the cleaning agent.
Examples of the experiments
Performance test 1-formaldehyde removal performance test: the formaldehyde cleaning agent prepared in the embodiment 1-4 is subjected to a formaldehyde removal test, 10mL of 36% formaldehyde is diluted with water to prepare a standard solution containing 5 micrograms of formaldehyde per milliliter, and the standard solution is sprayed on a 50m surface2Then, the formaldehyde detergents of examples 1-4 of the present invention were used to test the formaldehyde removal rate at different time intervals in a day, and the results of testing the formaldehyde concentration in air according to GB/T15516-,
table 1. test results:
as can be seen from Table 1, the formaldehyde detergents prepared in the embodiments 1 to 4 of the present invention have formaldehyde content of 0.137mg/m in 6h3About, the formaldehyde clearance rate also reaches about 85 percent, the formaldehyde removing effect is achieved in a short time, and the formaldehyde content in the room is reduced to 0.035mg/m after reaching 24 hours3About, the formaldehyde removal rate is achievedMore than 99 percent, which shows that the formaldehyde cleaner has excellent formaldehyde removal effect.
Performance test 2-the room after the above test is opened to ventilate, the formaldehyde gas in the room is evacuated, after 5 days, 10mL of water diluted 36% formaldehyde is added to prepare a standard solution containing 5 micrograms of formaldehyde per mL, and the standard solution is sprayed into the room, the room is sealed, the formaldehyde removal rate is tested again at different time periods, the test results are shown in table 2,
table 2. test results:
as can be seen from table 2, the formaldehyde scavengers prepared in embodiments 1 to 4 of the present invention have a removal rate of 70.8% or more in 8 hours and a removal rate of 55% or more in 24 hours, which indicates that the formaldehyde cleaner of the present invention has a good formaldehyde removal effect after 5 days and a long formaldehyde removal effect.
Claims (3)
1. An efficient and environment-friendly formaldehyde cleaner is characterized by comprising the following components in percentage by mass: 30-46% of deionized water, 2-4% of ammonium acetate, 6-12% of glacial acetic acid, 0.2-0.5% of acetylacetone, 8-10% of houttuynia cordata, 9-12% of quassia, 6-8% of isatis root, 5-8% of cassia seed and 15-20% of absolute ethyl alcohol.
2. The preparation method of the efficient and environment-friendly formaldehyde cleaner as claimed in claim 1, wherein the preparation method comprises the following steps:
s1: mixing and mashing houttuynia cordata, picrasma quassioides, isatis root and semen cassiae according to the proportion, then putting the mixture into a distillation flask, adding absolute ethyl alcohol, stirring for 6-10 min at room temperature, standing for 20-30 h, then heating and refluxing for 1-3 h, performing centrifugal separation, taking supernatant, and filtering with a microporous filter membrane to obtain filtrate for later use;
s2: and adding ammonium acetate, glacial acetic acid and acetylacetone into deionized water, ultrasonically stirring for 5-10 min, adding the filtrate obtained in the step S1, refluxing for 1-2 h at 50-65 ℃, cooling, and standing to obtain the detergent.
3. The efficient and environment-friendly formaldehyde cleaner as claimed in claim 1, wherein the centrifugation rate in step S1 is 5000-6000 r/min, and the centrifugation time is 15-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111254363.4A CN113856443A (en) | 2021-10-27 | 2021-10-27 | Efficient and environment-friendly formaldehyde cleaning agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111254363.4A CN113856443A (en) | 2021-10-27 | 2021-10-27 | Efficient and environment-friendly formaldehyde cleaning agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113856443A true CN113856443A (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111254363.4A Pending CN113856443A (en) | 2021-10-27 | 2021-10-27 | Efficient and environment-friendly formaldehyde cleaning agent and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113856443A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8529732D0 (en) * | 1985-12-03 | 1986-01-08 | Furniture Ind Res Ass | Measuring rate of formaldehyde emission |
| CN104226103A (en) * | 2014-09-12 | 2014-12-24 | 暨南大学 | Indoor air formaldehyde scavenging agent based on air conditioner fan and purifying method of indoor air formaldehyde scavenging agent |
| CN107261783A (en) * | 2017-06-13 | 2017-10-20 | 西藏阿木达草本科技有限公司 | A kind of Chinese herbal medicine sterilization is except formaldehyde air cleaning dew and preparation method thereof |
-
2021
- 2021-10-27 CN CN202111254363.4A patent/CN113856443A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8529732D0 (en) * | 1985-12-03 | 1986-01-08 | Furniture Ind Res Ass | Measuring rate of formaldehyde emission |
| CN104226103A (en) * | 2014-09-12 | 2014-12-24 | 暨南大学 | Indoor air formaldehyde scavenging agent based on air conditioner fan and purifying method of indoor air formaldehyde scavenging agent |
| CN107261783A (en) * | 2017-06-13 | 2017-10-20 | 西藏阿木达草本科技有限公司 | A kind of Chinese herbal medicine sterilization is except formaldehyde air cleaning dew and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张新华 等: "环境监测实验", vol. 1, 30 June 2017, 中国环境出版社, pages: 82 * |
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Effective date of registration: 20240708 Address after: 416799 Tangjia Group, Liandonggang Community, Lingxi Town, Yongshun County, Xiangxi Tujia and Miao Autonomous Prefecture, Hunan Province Applicant after: Xie Jun Country or region after: China Address before: 201612 No. 836, Maixin Road, Xinqiao Town, Songjiang District, Shanghai Applicant before: Shanghai Yuhao New Material Co.,Ltd. Country or region before: China |