CN101250383B - Method for eliminating free formaldehyde in adhesive for machining woodwork by using potassium hypermanganate - Google Patents
Method for eliminating free formaldehyde in adhesive for machining woodwork by using potassium hypermanganate Download PDFInfo
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- CN101250383B CN101250383B CN200810047163XA CN200810047163A CN101250383B CN 101250383 B CN101250383 B CN 101250383B CN 200810047163X A CN200810047163X A CN 200810047163XA CN 200810047163 A CN200810047163 A CN 200810047163A CN 101250383 B CN101250383 B CN 101250383B
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- potassium permanganate
- sizing agent
- woodwork
- formaldehyde
- free formaldehyde
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Abstract
The invention relates to a method for eliminating potassium permanganate in tackiness agent for processing wooden wares, which relates to a method for eliminating potassium permanganate in tackiness agent for processing wooden wares by potassium permanganate The method is characterized in that the method comprises the following steps: firstly, preparing potassium permanganate into potassium permanganate solution whose mass concentration which is 0.1-1mol/L, secondly, adopting one of the following two modes, first, adding potassium permanganate solution in tackiness agent for processing woodenwares, wherein the adding amount of potassium permanganate is 4%-12% of the weight of tackiness agent for processing wooden wares, second, adding potassium permanganate solution after tackiness agentpolymerization reaction is finished in the process for producing tackiness agent for processing wooden wares, wherein adding amount of potassium permanganate is 8%-10% of the tackiness agent mass after polymerization reaction in producing tackiness agent for processing wooden wares, thirdly, evenly stirring, adjusting pH to 3.0-5.0 with acid, wherein the control temperature is 45 DEG C to 90 DEG C, and reacting for 28-32 minutes. The method has the advantages of high efficiency, low production cost, innocuity and environmental protection.
Description
Technical field
The present invention relates to a kind of method of woodwork processing that be used for eliminating with the free formaldehyde of sizing agent.
Background technology
The carcinogenesis of formaldehyde is confirmed by the World Health Organization.Active formaldehyde does not need just can attack nucleophilic group through metabolism, and forms adducts with the DNA bonding, causes dna break and interchain linkage etc., thereby causes multiple disease.
Formaldehyde character is active, and cheap, is widely used in chemical industry.Sizing agents such as industrial resol, vinyl-formal resin, terpolycyantoamino-formaldehyde resin all are that employing formaldehyde is main raw material, and the sizing agent of producing all contains a certain amount of free formaldehyde.Wood-based plate its free formaldehyde release period in the life-time service process that adopts these sizing agents to make reaches 10 years, thereby the health of human body is caused great harm.
There are a lot of methods to be used for removing the free formaldehyde that indoor furniture discharges at present, for example: adsorb decomposition, gas atomization, photocatalytic degradation, the sheet material after the applying glue is carried out aftertreatment etc.Because these methods can only be handled furniture or other woodwork is discharged into airborne formaldehyde gas, so efficient is low, still have the injury to human body in the treating processes.
The release of free formaldehyde is a very long process in the woodworks such as furniture, in this process, owing to formaldehyde constantly discharges also disperse in air, absorption decomposition, gas atomization processing and photocatalytic degradation still can not be avoided the murder by poisoning of airborne formaldehyde to human body.In addition, adopt porous materials such as gac, molecular sieve, the formaldehyde of absorption also can raise with envrionment temperature and the desorb problem occur, and some aerosol mainly is amine, phenols or aminocompound, itself also can cause murder by poisoning to HUMAN HEALTH, might cause secondary pollution.
Summary of the invention
The object of the present invention is to provide and a kind ofly eliminate the method for woodwork processing with free formaldehyde in the sizing agent with potassium permanganate, this method is eliminated efficient height, cheap, the asepsis environment-protecting of woodwork processing with free formaldehyde in the sizing agent.
To achieve these goals, technical scheme of the present invention is: a kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it is characterized in that it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 0.1～1mol/L;
2) adopt one of following two kinds of modes: (1) adds potassium permanganate solution in woodwork is processed with sizing agent, and the add-on of potassium permanganate is woodwork processing 4%～12% of a sizing agent quality; (2) after woodwork processing treats that the sizing agent polyreaction is finished in sizing agent production, add potassium permanganate solution, the add-on of potassium permanganate is woodwork processing with 8%～10% of the sizing agent quality after polyreaction is finished in the sizing agent production;
3) stir, adjusting PH with acid is 3.0～5.0, and controlled temperature is 45 ℃～90 ℃, reacts to get final product in 28～32 minutes.
Can be nontoxic carbonic acid gas and water effectively with free oxidation of formaldehyde in the sizing agent, the formaldehyde content that dissociates in the sizing agent after the oxidation is reduced to below 0.3% of relevant regulations of GB/T14732-2006, thereby reaches the purpose of eliminating free formaldehyde wood furniture and other woodwork from the source.
Described woodwork processing is the sizing agents such as resol, vinyl-formal resin or terpolycyantoamino-formaldehyde resin that contain free formaldehyde with sizing agent.
Described acid is sulfuric acid, hydrochloric acid or other protonic acids.
The present invention utilizes potassium permanganate and formaldehyde generation redox reaction, is carbonic acid gas with deleterious oxidation of formaldehyde.Its reaction equation is as follows:
4MnO
4 -+5HCHO+12H
+＝5CO
2+4Mn
2++11H
2O
Compared with prior art, the invention has the beneficial effects as follows:
1. the present invention adopts oxidation reduction process to eliminate woodwork processing with free formaldehyde in the sizing agent, can reach the purpose of eliminating free formaldehyde wood furniture and other woodwork from the source.
2. to adopt potassium permanganate be that oxygenant is eliminated formaldehyde in the present invention, oxidation of formaldehyde efficient height, cheap, and asepsis environment-protecting.
3. oxygenant of the present invention can be harmless carbonic acid gas and water with free oxidation of formaldehyde in the resin sizing agent, to the environment non-secondary pollution.
4. method is simple: the present invention does not need complex apparatus and harsh external conditions.
5. the oxygenant scope of application of the present invention is extensive, can be used for sizing agent and other processing that contain the sizing agent of free formaldehyde and contain the organic system of formaldehyde such as resol, vinyl-formal resin, terpolycyantoamino-formaldehyde resin.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) choosing woodwork processing with sizing agent is: containing free HCHO is the vinyl-formal resin sizing agent 50.0g of 1% (quality), KMnO
4Solution (0.5mol/L) 27ml;
2) with the above-mentioned KMnO for preparing
4Solution joins in the vinyl-formal resin sizing agent, stir, and to adjust PH with 0.1mol/L sulfuric acid is 4,85 ℃ of reactions 30 minutes.
3) discharging is pressed GB/T14074-2006 and is detected free formaldehyde content 0.1% in the vinyl-formal resin, be lower than GB/T14732-2006 relevant regulations 0.3%.
Embodiment 2:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) choosing woodwork processing with sizing agent is: contain the HCHO that dissociates and be 1% phenolic resin adhesive 30.0g, KMnO
4Solution (0.5mol/L) 16ml;
2) the above-mentioned KMnO4 solution for preparing is joined in the phenolic resin adhesive, stir, and to adjust PH with 0.1mol/L sulfuric acid be 4,85 ℃ of reactions 30 minutes.
3) discharging is pressed GB/T14074-2006 and is detected free formaldehyde content 0.1% in the resol, be lower than GB/T14732-2006 relevant regulations 0.3%.
Embodiment 3:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) choosing woodwork processing with sizing agent is: contain the HCHO that dissociates and be 1% terpolycyantoamino-formaldehyde resin 20.0g, KMnO
4Solution (0.5mol/L) 11ml;
2) with the above-mentioned KMnO for preparing
4Solution joins in the glutinous agent of terpolycyantoamino-formaldehyde resin, stirs, and adjusts PH with 0.1mol/L sulfuric acid and be 4,85 ℃ and reacted 30 minutes.
3) discharging is pressed GB/T14074-2006 and is detected free formaldehyde content 0.1% in the terpolycyantoamino-formaldehyde resin, be lower than GB/T14732-2006 relevant regulations 0.3%.
Embodiment 4:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 0.1mol/L;
2) add potassium permanganate solution in woodwork is processed with sizing agent, the add-on of potassium permanganate is woodwork processing 4% of a sizing agent quality; Described woodwork processing is the vinyl-formal resin sizing agent that contains free formaldehyde with sizing agent;
3) stir, adjusting PH with dilute sulphuric acid is 3, and controlled temperature is 45 ℃, reacts to get final product in 28 minutes.
Embodiment 5:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 1mol/L;
2) add potassium permanganate solution in woodwork is processed with sizing agent, the add-on of potassium permanganate is woodwork processing 12% of a sizing agent quality; Described woodwork processing is the phenolic resin adhesive that contains free formaldehyde with sizing agent;
3) stir, adjusting PH with dilute sulphuric acid is 3, and controlled temperature is 90 ℃, reacts to get final product in 32 minutes.
Embodiment 6:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 0.1mol/L;
2) after woodwork processing treats that the sizing agent polyreaction is finished in sizing agent production, add potassium permanganate solution, the add-on of potassium permanganate is woodwork processing with 8% of the sizing agent quality after polyreaction is finished in the sizing agent production; Described woodwork processing is the glutinous agent of melamine-formaldehyde resin adhesive that contains free formaldehyde with sizing agent;
3) stir, adjusting PH with dilute hydrochloric acid is 5.0, and controlled temperature is 45 ℃, reacts to get final product in 28 minutes.
Embodiment 7:
A kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 0.5mol/L;
2) after woodwork processing treats that the sizing agent polyreaction is finished in sizing agent production, add potassium permanganate solution, the add-on of potassium permanganate is woodwork processing with 9% of the sizing agent quality after polyreaction is finished in the sizing agent production; Described woodwork processing is the vinyl-formal resin sizing agent that contains free formaldehyde with sizing agent;
3) stir, adjusting PH with 0.1mol/L hydrochloric acid is 4.5, and controlled temperature is 80 ℃, reacts to get final product in 30 minutes.
All sizing agents that contain free formaldehyde are applicable to the present invention, do not enumerate embodiment one by one at this.
Claims (2)
1. the method with free formaldehyde in the potassium permanganate elimination woodwork processing usefulness sizing agent is characterized in that it comprises the steps:
1) potassium permanganate is mixed with the potassium permanganate solution of 0.1～1mol/L;
2) adopt one of following two kinds of modes: (1) adds potassium permanganate solution in woodwork is processed with sizing agent, and the add-on of potassium permanganate is woodwork processing 4%～12% of a sizing agent quality; (2) after woodwork processing treats that the sizing agent polyreaction is finished in sizing agent production, add potassium permanganate solution, the add-on of potassium permanganate is woodwork processing with 8%～10% of the sizing agent quality after polyreaction is finished in the sizing agent production;
Described woodwork processing is resol, vinyl-formal resin or the terpolycyantoamino-formaldehyde resin that contains free formaldehyde with sizing agent;
3) stir, adjusting PH with acid is 3.0～5.0, and controlled temperature is 45 ℃～90 ℃, reacts to get final product in 28～32 minutes.
2. according to claim 1 a kind of with the method for potassium permanganate elimination woodwork processing with free formaldehyde in the sizing agent, it is characterized in that: described acid is sulfuric acid or hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810047163XA CN101250383B (en) | 2008-03-27 | 2008-03-27 | Method for eliminating free formaldehyde in adhesive for machining woodwork by using potassium hypermanganate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810047163XA CN101250383B (en) | 2008-03-27 | 2008-03-27 | Method for eliminating free formaldehyde in adhesive for machining woodwork by using potassium hypermanganate |
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| Publication Number | Publication Date |
|---|---|
| CN101250383A CN101250383A (en) | 2008-08-27 |
| CN101250383B true CN101250383B (en) | 2011-03-16 |
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|---|---|---|---|
| CN200810047163XA Expired - Fee Related CN101250383B (en) | 2008-03-27 | 2008-03-27 | Method for eliminating free formaldehyde in adhesive for machining woodwork by using potassium hypermanganate |
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| CN106147623A (en) * | 2016-07-01 | 2016-11-23 | 王锶源 | A kind of watertight label adhesive |
| CN106333567A (en) * | 2016-11-18 | 2017-01-18 | 淮北智淮科技有限公司 | A Pollution-free Photo Frame and Its Production Techniques |
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