CN115382375A - Formaldehyde removal composition and method for targeted removal of formaldehyde by using same - Google Patents

Formaldehyde removal composition and method for targeted removal of formaldehyde by using same Download PDF

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Publication number
CN115382375A
CN115382375A CN202211024510.3A CN202211024510A CN115382375A CN 115382375 A CN115382375 A CN 115382375A CN 202211024510 A CN202211024510 A CN 202211024510A CN 115382375 A CN115382375 A CN 115382375A
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Prior art keywords
formaldehyde
removing composition
parts
pollution source
removal
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魏伟才
王伟
董君平
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Guangdong Lvjingjie New Material Technology Co ltd
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Guangdong Lvjingjie New Material Technology Co ltd
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    • 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
    • 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
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
    • 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
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention relates to the field of air purification, and particularly relates to a formaldehyde-removing composition which comprises the following components: formaldehyde catching agent, adhesive, stabilizer, cosolvent and solvent; the formaldehyde catching agent is prepared from one or more of ethylene urea, hydrazide compounds, ammonia water, glycine, ammonium chloride and chitosan; the formaldehyde removing composition can remove formaldehyde in free state in space and on the surface of a pollution source, and can also penetrate into the pollution source for deep removal, so that subsequent formaldehyde is prevented from being released again.

Description

Formaldehyde removal composition and method for targeted removal of formaldehyde by using same
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a formaldehyde removing composition and a formaldehyde targeted removing method thereof.
Background
In people's daily life, formaldehyde contained in consumer goods such as interior decoration materials, furniture, specially finished clothing fabrics and the like has become one of serious pollutants of indoor air.
Researchers find that the pendulous foliage plant chlorophytum comosum can purify formaldehyde in indoor air, but the formaldehyde removal time is longer and the absorption amount is limited by adopting a plant absorption method. Another researchers soaked microporous granular carbon in phosphoric acid solution and soaked activated carbon in ZnCl 2 In the solution, formaldehyde in indoor air is adsorbed by dried active carbon, but active carbon is used for adsorbing formaldehydeAldehydes are easily saturated. Researches show that the photocatalyst has a good degradation effect on air pollutants, but the method needs ultraviolet light and professional personnel for operation and can bring secondary pollution. The single hydrazide and ammonia substances have common effects and can cause secondary pollution. The formaldehyde removing composition without adhesive and with poor permeability is easy to erase when being used for removing formaldehyde in the fields of decoration furniture and the like, only works in a short time, and the formaldehyde can be released again after a period of time.
The prior art can only remove free formaldehyde in space and on the surface of an object, the removal effect is not durable, the formaldehyde in the deep layer of the formaldehyde pollution source can be continuously released, and the indoor formaldehyde content can be restored to the original level after a period of time.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned problems, and an object of the present invention is to provide a formaldehyde removing composition, which can not only remove formaldehyde in a free state on the surface of a space and a pollution source, but also can deeply penetrate into the pollution source for deep removal, thereby preventing the subsequent release of formaldehyde.
In order to achieve the above purpose, the invention is realized by the following technical scheme.
The formaldehyde removing composition comprises the following components in parts by weight:
Figure BDA0003815083090000021
the formaldehyde catching agent is prepared from ethylene urea, hydrazide compounds, ammonia water, glycine, ammonium chloride and chitosan.
Optionally, the formaldehyde catching agent comprises ethylene urea and a hydrazide compound, and the weight ratio of the ethylene urea to the hydrazide compound is 1 (0.5-4).
Optionally, the adhesive is one or more of polyvinyl alcohol, polyethylene glycol, acrylic resin and lauryl alcohol.
Optionally, the stabilizer is one or two of anhydrous magnesium chloride and sodium chloride.
Optionally, the cosolvent is one or two of ethanol and methanol.
Optionally, the solvent is one or two of deionized water and distilled water.
Another object of the present invention is to provide a method for targeted formaldehyde removal, comprising the following steps:
(1) Cleaning the surface of a pollution source;
(2) Uniformly mixing the formaldehyde-removing composition according to any one of claims 1 to 6, and then spraying the mixture on the surface of a pollution source, and sufficiently wetting the mixture to enable the mixture to penetrate into the interior of the pollution source;
(3) And (5) naturally drying.
The invention utilizes the deoxidation characteristic of the composition to convert the side chain forming formaldehyde in the urea-formaldehyde resin into stable harmless substances. The composition has a highly branched tree structure, a side chain contains a structure with a large number of primary amine and secondary amine connected, and the composition has stable properties.
Irreversible reaction mechanism for degrading formaldehyde:
H 2 N-HN-C-R-C-NH-NH 2 +HCHO→H 2 N-HN-C-R-C-NH-NH-CH 2 OH
→H 2 N-HN-C-R-C-NH-N＝CH 2 +H 2 o (dehydration reaction, removal of a Water molecule)
→[-NR'-CH 2 -]n (polymerization reaction, wherein R' is H) 2 N-HN-C-R-C-NH-). The oxygen atom is removed, and the hydroxymethyl group is not remained, which is an irreversible reaction and belongs to chemical adsorption, and the formaldehyde molecule can not be released again.
The application has the following beneficial effects: the composition of the invention can not only remove formaldehyde in free state on the surface of space and pollution source, but also can penetrate into the pollution source for deep removal, thereby preventing the subsequent formaldehyde from being released again.
Detailed Description
The invention is further described below with reference to examples, but the scope of the invention as claimed is not limited to the examples.
When the formaldehyde removing composition is sprayed on the surfaces of formaldehyde release sources such as board furniture and the like, the formaldehyde catching agent can gradually permeate into the surface layer of the release source and below the surface layer, the formaldehyde catching agent is attached to the surface of the furniture by the adhesive, the permeation effect of the formaldehyde catching agent is enhanced, the formaldehyde catching agent is deep into the source of formaldehyde release and reacts with formaldehyde to generate harmless substances, the formaldehyde removing effect cannot be influenced even if a small amount of formaldehyde catching agent remained on the surface is erased in the later period, the cosolvent can accelerate the preparation speed of the composition, the stability of the composition is ensured by the stabilizer, and the formaldehyde removing composition can be stored for a long time by taking the solvent as a carrier.
The hydrazide compound in the invention is any one or more of acethydrazide, adipic acid dihydrazide and oxalic acid dihydrazide.
The formaldehyde removing composition in the invention is any one or more of ethylene urea, hydrazide compounds, ammonia water, glycine, ammonium chloride and chitosan.
The adhesive in the invention is any one or more of polyvinyl alcohol, polyethylene glycol, acrylic resin and lauryl alcohol.
The stabilizer in the invention is one or two of anhydrous magnesium chloride and sodium chloride.
The cosolvent in the invention is one or two of ethanol and methanol.
The solvent in the invention is one or two of deionized water and distilled water.
Example 1
Firstly, 0.1 part of polyvinyl alcohol and 10 parts of ethanol are mixed, then the temperature is raised to 45 ℃, and the mixture is stirred for 30min, so that the polyvinyl alcohol is completely dissolved in the ethanol to obtain a mixed solution; and then mixing the mixed solution with 80 parts of deionized water, 5 parts of ethylene urea, 5 parts of adipic dihydrazide and 0.2 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 2
Firstly, 0.5 part of polyvinyl alcohol and 30 parts of ethanol are mixed, then the temperature is raised to 45 ℃, and the mixture is stirred for 30min, so that the polyvinyl alcohol is completely dissolved in the ethanol to obtain a mixed solution; and then mixing the mixed solution with 120 parts of deionized water, 10 parts of ethylene urea, 10 parts of adipic dihydrazide and 1 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 3
Firstly, 0.5 part of polyvinyl alcohol and 20 parts of ethanol are mixed, then the temperature is raised to 45 ℃, and the mixture is stirred for 30min, so that the polyvinyl alcohol is completely dissolved in the ethanol, and mixed liquid is obtained; and then mixing the mixed solution with 100 parts of deionized water, 3 parts of ethylene urea, 4 parts of ammonia water, 3 parts of chitosan and 0.5 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 4
Firstly, 0.5 part of polyvinyl alcohol and 20 parts of ethanol are mixed, then the temperature is raised to 45 ℃, and the mixture is stirred for 30min, so that the polyvinyl alcohol is completely dissolved in the ethanol, and mixed liquid is obtained; and then mixing the mixed solution with 100 parts of deionized water, 3 parts of glycine, 4 parts of ammonium chloride, 3 parts of chitosan and 0.5 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 5
Firstly, 0.5 part of lauryl alcohol and 20 parts of methanol are mixed, then the temperature is raised to 45 ℃, and the mixture is stirred for 30min, so that the lauryl alcohol is completely dissolved in the methanol to obtain a mixed solution; and then mixing the mixed solution with 100 parts of distilled water, 3 parts of glycine, 4 parts of ammonium chloride, 3 parts of chitosan and 0.5 part of sodium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 6
Mixing 0.5 part of polyethylene glycol, 0.5 part of acrylic resin, 10 parts of methanol and 10 parts of ethanol, heating to 45 ℃, and stirring for 30min to completely dissolve the polyethylene glycol and the acrylic resin in an alcohol solution to obtain a mixed solution; and then mixing the mixed solution with 100 parts of distilled water, 3 parts of glycine, 4 parts of ammonium chloride, 3 parts of chitosan and 0.5 part of sodium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 7
Firstly, mixing 1 part of polyvinyl alcohol and 20 parts of ethanol, then heating to 45 ℃ and stirring for 30min to completely dissolve the polyvinyl alcohol in the ethanol to obtain a mixed solution; and then mixing the mixed solution with 120 parts of deionized water, 3 parts of ethylene urea, 4 parts of acethydrazide, 3 parts of chitosan and 1 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 8
Firstly, mixing 1 part of polyvinyl alcohol and 20 parts of ethanol, then heating to 45 ℃ and stirring for 30min to completely dissolve the polyvinyl alcohol in the ethanol to obtain a mixed solution; and then mixing the mixed solution with 120 parts of deionized water, 6 parts of ethylene urea, 1 part of acethydrazide, 3 parts of chitosan and 1 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
Example 9
Firstly, mixing 1 part of polyvinyl alcohol and 20 parts of ethanol, then heating to 45 ℃ and stirring for 30min to completely dissolve the polyvinyl alcohol in the ethanol to obtain a mixed solution; and then mixing the mixed solution with 120 parts of deionized water, 1 part of ethylene urea, 6 parts of acethydrazide, 3 parts of chitosan and 1 part of anhydrous magnesium chloride, fully stirring, and then standing at room temperature for 24 hours to obtain the formaldehyde-removing composition.
The formaldehyde removing compositions prepared in the above examples 1 to 9 were prepared by the following methods:
(1) Cleaning the surface dust of a house containing formaldehyde in a room by using an air gun;
(2) Spraying any one of the formaldehyde-removing compositions prepared in the embodiments 1 to 9 on the surface of a house through a sprayer, and fully wetting the surface of the house to enable the formaldehyde-removing composition to penetrate into the inside of the house;
(3) And naturally drying for 3 days.
Performance testing
And (4) constructing an experimental device according to the national standard QB-T2761-2006 method for measuring the purification effect of indoor air purification products, and carrying out experimental tests. A1 m square bare board capable of releasing formaldehyde was placed in a 10 m square blank chamber and after 24h, the formaldehyde concentration in the blank chamber was measured to be 1 mg/m, 5g of the compositions of examples 1 to 9 were each separately applied to each blank chamber and after 12h and 24h, the formaldehyde concentration in the blank chamber was measured. Formaldehyde removal = (initial concentration-sample concentration)/initial concentration 100%, test results are given in the following table:
Figure BDA0003815083090000061
Figure BDA0003815083090000071
as can be seen from the comparison of examples 1 and 2 in the table above, the formaldehyde removing composition of the present invention has a formaldehyde removing rate increased with the increase of the relative concentration of the formaldehyde scavenger; comparing examples 1 and 3, it can be seen that the formaldehyde removal rate of the combination of vinylurea and hydrazide compound is better than that of the combination of vinylurea, ammonia water and chitosan when the relative concentration of formaldehyde scavenger is the same; it is understood from comparative examples 3 to 6 that, when the relative concentration of the formaldehyde scavenger is the same, the formaldehyde removal rate of the combination containing ethylene urea is better than that of the combination not containing ethylene urea; it is understood from comparative examples 7 to 9 that, when the relative concentration of the formaldehyde scavenger is the same, the weight ratio of the vinylurea to the hydrazide compound is within a certain range to obtain a superior formaldehyde removal effect.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (7)

1. The formaldehyde removing composition is characterized by comprising the following components in parts by weight:
Figure FDA0003815083080000011
the formaldehyde catching agent is prepared from one or more of ethylene urea, hydrazide compounds, ammonia water, glycine, ammonium chloride and chitosan.
2. The formaldehyde removing composition as claimed in claim 1, wherein the formaldehyde scavenger comprises vinylurea and a hydrazide compound, and the weight ratio of the vinylurea to the hydrazide compound is 1 (0.5-4).
3. The formaldehyde removing composition as claimed in claim 1, wherein the adhesive is one or more of polyvinyl alcohol, polyethylene glycol, acrylic resin, and lauryl alcohol.
4. The formaldehyde removing composition as claimed in claim 1, wherein the stabilizer is one or both of anhydrous magnesium chloride and sodium chloride.
5. The formaldehyde-removing composition as claimed in claim 1, wherein the co-solvent is one or both of ethanol and methanol.
6. The formaldehyde removing composition as claimed in claim 1, wherein the solvent is one or both of deionized water and distilled water.
7. A method for targeted formaldehyde removal is characterized by comprising the following steps:
(1) Cleaning the surface of a pollution source;
(2) Uniformly mixing the formaldehyde-removing composition according to any one of claims 1 to 6, and then spraying the mixture on the surface of a pollution source, and sufficiently wetting the mixture to enable the mixture to penetrate into the interior of the pollution source;
(3) And (5) naturally drying.
CN202211024510.3A 2022-08-25 2022-08-25 Formaldehyde removal composition and method for targeted removal of formaldehyde by using same Pending CN115382375A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109925852A (en) * 2019-03-20 2019-06-25 北京菲迪可环保科技有限公司 A method of except formaldehyde composition and removal formaldehyde

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109925852A (en) * 2019-03-20 2019-06-25 北京菲迪可环保科技有限公司 A method of except formaldehyde composition and removal formaldehyde

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