CN104492380A - Preparation method for indoor solid aldehyde removal agent - Google Patents
Preparation method for indoor solid aldehyde removal agent Download PDFInfo
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- CN104492380A CN104492380A CN201410689337.8A CN201410689337A CN104492380A CN 104492380 A CN104492380 A CN 104492380A CN 201410689337 A CN201410689337 A CN 201410689337A CN 104492380 A CN104492380 A CN 104492380A
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Abstract
The invention discloses a preparation method for an indoor solid aldehyde removal agent. The aldehyde removal agent is mainly composed of an adsorbent carrier supporting ethyleneurea and a reaction promoter. By employing the mode of cooperative usage of ethyleneurea and the adsorbent promoter, formaldehyde in air is physically adsorbed by the adsorbent carrier, and also is subjected to a chemical reaction with ethyleneurea on the adsorbent carrier, and finally formaldehyde is converted into a nontoxic odorless substance, and thorough removal of formaldehyde is realized. The preparation method is extremely simple, concretely, the indoor solid aldehyde removal agent is prepared by employing ethyleneurea and the reaction promoter for preparing a reaction reagent solution, and then dipping the adsorbent carrier in the solution. The operation process is simple and rapid, the price is low, and the indoor solid aldehyde removal agent is especially suitable for household daily use.
Description
Technical field
The invention belongs to formaldehyde removing field, specifically, is a kind of preparation method of indoor solid formaldehyde elimination agent.
Background technology
Formaldehyde is considered to the class suspect carcinogen ranked the first in indoor pollution always, usually decoration is derived from, finishing material, furniture and coating etc., especially be very with the adhesive of artificial board and use thereof, artificial board comprises face artificial board, glued board, particieboard, fiberboard, composite floor board etc., they use phenolic aldehyde containing formaldehyde and Lauxite in process of production, according to statistics display, domestic artificial board more than 90% adopts urea-formaldehyde glue to suppress, thus no doubt free formaldehyde can be produced when applying, be applied in Furniture manufacture or the application of other sheet material and often certain impact produced on human body.In actual application, free formaldehyde Producing reason comprises the following aspects:
(1) insufficient and remaining free formaldehyde is reacted during resins synthesis;
(2) resins synthesis participates in reaction formaldehyde, owing to defining unstable group, heat press greatly with hard board use procedure in discharge again the formaldehyde combined;
(3) in board making process, owing to adding solid agent, under electrolytical effect, around resin micelle, the absorption ion layer of established tool stability is destroyed, thus discharges formaldehyde and cause hardening of resin.
To volatilize the injury that human body is caused for eliminating wood-based plate Free-formaldehyde, the greenization of wood-based plate is produced and has been become the crucial part affecting wood-based plate market, the existing safe wood-based plate occurring two types on the market, one is, as patent document CN1404891A(artificial board formaldehyde remover and preparation method, 2003.03.26) a kind of formaldehyde eliminating agent being applicable to wood-based panel industry production post processing recorded, this formaldehyde eliminating agent is for being coated in wood-based plate, enter after infiltration in wood-based plate and react with free formaldehyde wherein, to reach the effect eliminating free formaldehyde, another kind is, as patent document CN1739821A(ethylene carbamido amino derivative as formaldehyde eliminator, 2006.03.01) formaldehyde eliminating agent being applicable to add in amino resins recorded, with urea-formaldehyde glue etc. with the use of, to reach the object of removing urea-formaldehyde glue Free-formaldehyde.
In actual use, the volatilizes of free formaldehyde generally can continue 10 ~ 15 years, in above-mentioned two kinds of formaldehyde scavengers, the active ingredient added is limited, once after effect inefficacy, the free formaldehyde in wood-based plate still can discharge out in a large number, cause the pollution of room air, in addition, when formaldehyde scavenger and formaldehyde generation incomplete reaction, also may generate other noxious materials and cause secondary pollution.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of indoor solid formaldehyde elimination agent, this method preparation process is simple, ethyleneurea and reaction promoter is adopted to be mixed with reactant solution, then adsorbing agent carrier is used to soak obtained wherein, in actual application, ethyleneurea and adsorbing agent carrier are used in conjunction with each other, adsorbing agent carrier carries out physical absorption to the formaldehyde in air, and simultaneously on adsorbing agent carrier with ethyleneurea generation chemical reaction, formaldehyde conversion is finally made to become nontoxic, tasteless substance, realize the thorough removing of formaldehyde, easy to use, pollution-free, be proven, use rear air quality be improved significantly, cost of manufacture is cheap, especially suitable family routine use.
The present invention is achieved through the following technical solutions: a kind of preparation method of indoor solid formaldehyde elimination agent, described formaldehyde elimination agent forms primarily of the adsorbing agent carrier of load by ethyleneurea and reaction promoter, and the preparation method of described formaldehyde elimination agent comprises the steps:
(1) get the raw materials ready: adsorbing agent carrier is sent in thermostatic drying chamber, for subsequent use after dry, in (0.032 ~ 0.144): the ratio of (0.008 ~ 0.01) takes ethyleneurea and promoter respectively, the ethyleneurea taken and promoter are dissolved in water, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the adsorbing agent carrier obtained after step (1) is dry puts into reactant solution, takes out after soaking 3 ~ 5h;
(3) dry: the adsorbing agent carrier after soaking to be sent in vacuum drying oven, after dry 20 ~ 24h, prepares formaldehyde elimination agent product.
The formaldehyde elimination agent that the present invention obtains realizes the thorough removing of PARA FORMALDEHYDE PRILLS(91,95) by physical absorption and chemical reaction two kinds of modes, wherein, adsorbing agent carrier can realize the absorption of formaldehyde, by the formaldehyde that adsorbs on adsorbing agent carrier again with the ethyleneurea generation chemical reaction of load, finally make that formaldehyde conversion becomes nontoxic, tasteless substance, realize the thorough removing of formaldehyde.
Further, in described step (2), count in mass ratio, described in put into the adsorbing agent carrier of reactant solution: ethyleneurea: reaction promoter=1:(0.16 ~ 0.72): (0.04 ~ 0.05).
The adsorbing agent carrier that the present invention relates to should be selected specific area large and have the carrier of good adsorption properties, in the present invention, described adsorbing agent carrier is the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.
The reaction that the present invention relates to can generate compound that is nontoxic, tasteless substance with formolite reaction, in the present invention, described ethyleneurea by mol ratio be the ethylenediamine of 1.5:1:0.5, urea, water adds in reactor, heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, described ethyleneurea is white crystalline.
In the present invention, described ethylenediamine, urea, water heating-up temperature is in the reactor 110 ~ 240 DEG C, reaction time is 3 ~ 4h, and after obtaining ethyleneurea paste, continuous heating stirs, after ethyleneurea paste dissolves, be cooled to 150 ~ 180 DEG C, then add water-soluble solution, and keep temperature > 100 DEG C, after the hydrolysis of ethyleneurea dissolved matter, more after filtration, the ethyleneurea of white crystalline can be obtained after drying.
In the present invention, the effect of reaction promoter is: play catalytic action when reactant and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, its result of use is good, and described reaction promoter comprises the mixture of one or more compositions in magnesium sulfate, calcium sulfate, magnesium chloride or calcium chloride.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention utilizes load to have the adsorbing agent carrier of ethyleneurea the physical absorption of formaldehyde and chemical reaction to be combined, formaldehyde in air is after adsorbing agent carrier absorption, can with the ethyleneurea generation chemical reaction of its load, finally make that formaldehyde conversion becomes nontoxic, tasteless substance, formaldehyde (aldehyde material) a large amount of in removing air that can not only be permanently effective, the thorough removing of formaldehyde (aldehyde material) can also be realized, easy to use, pollution-free, be suitable for extensively promoting the use of.
(2) the present invention on adsorbing agent carrier also load to respond promoter, this reaction promoter can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, and its practical effect is good.
(3) adsorbing agent carrier of the present invention can adopt the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, adsorbing agent carrier is except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.
(4) preparation process of the present invention is simple, adopts ethyleneurea and reaction promoter to be mixed with reactant solution, and then use adsorbing agent carrier to soak obtained wherein, cost of manufacture is cheap and simple to operate.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
Because existing artificial board can use phenolic aldehyde containing formaldehyde and Lauxite in process of production, and by the furniture of this class board making and building materials of house fitting-up etc. while using for people, in sheet material residual and have neither part nor lot in the formaldehyde of reaction can Environment release towards periphery gradually, the longest release period can for 15 years, for this reason, formaldehyde has become the main body of current room air pollution, based on the yoke of current people to the technological development of artificial board, as: the most aldehyde product Use Limitation that disappears is poor, , once after effect inefficacy, free formaldehyde in wood-based plate still can discharge out in a large number, cause the pollution etc. of room air, for solving the defect that prior art exists, the present invention proposes a kind of preparation method of indoor solid formaldehyde elimination agent, this formaldehyde elimination agent uses mainly for indoor environment, utilize the mode that physical absorption and chemical reaction combine, reach the thorough removing of formaldehyde, a large amount of formaldehyde in removing air that can not only be permanently effective, also formaldehyde conversion can be become nontoxic, tasteless substance, avoid the generation of secondary pollution.
The formaldehyde elimination agent that the present embodiment relates to is made up of following component: by ratio of quality and the number of copies,
Adsorbing agent carrier: 1 part, can select active carbon;
Ethyleneurea: 0.032 part can be the ethylenediamine of 1.5:1:0.5 by mol ratio, urea, water add in reactor, and heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, this ethyleneurea is white crystalline;
Reaction promoter: 0.008 part, can select magnesium sulfate.
In the present invention, ethyleneurea and reaction promoter are the chemical composition be carried on adsorbing agent carrier, adsorbing agent carrier should be selected specific area large and have the carrier of good adsorption properties, as the present embodiment mentions the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.When reality uses, adsorbing agent carrier is by its strong suction-operated, taste gas is had to adsorb by poisonous to the formaldehyde in air and other, formaldehyde is carried out chemical reaction by the ethyleneurea adsorbing rear and its load, change into nontoxic, the thorough removing of formaldehyde is realized after tasteless substance, the effect of reaction promoter is: can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, its practical effect is good.
The preparation method of the formaldehyde elimination agent that the present embodiment relates to comprises the steps:
(1) get the raw materials ready: take in 500g, 300 object active carbons feeding thermostatic drying chambers and carry out drying, for subsequent use after dry 24h, choose ethyleneurea and the magnesium sulfate of solid powdery, the ethyleneurea of 160g and the magnesium sulfate of 20g is taken respectively in the ratio of 0.032:0.008, the ethyleneurea taken and magnesium sulfate are dissolved in the water of 100ml, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the active carbon obtained after step (1) is dry puts into reactant solution, takes out after soaking 3h;
(3) dry: the active carbon after soaking to be sent in vacuum drying oven, after dry 20h, prepares the formaldehyde elimination agent product of 536g.
The formaldehyde elimination agent product that the present embodiment obtains is detected, first, the evaporating dish of the formalin filling 100ml, 72mg/ml is put in drier, volatilize after 5h under room temperature, take out evaporating dish in drier, then put into the evaporating dish filling 4g formaldehyde elimination agent product and the beaker filling 100ml deionized water, with the concentration of formaldehyde in acetylacetone,2,4-pentanedione spectrophotometry deionized water after 24h, and calculating clearance, the formaldehyde clearance obtaining the present embodiment acquisition formaldehyde elimination agent product is as calculated 97.5%.
Embodiment 2:
The formaldehyde elimination agent that the present embodiment relates to is made up of following component: by ratio of quality and the number of copies,
Adsorbing agent carrier: 1 part, can select attapulgite clay;
Ethyleneurea: 0.144 part can be the ethylenediamine of 1.5:1:0.5 by mol ratio, urea, water add in reactor, and heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, this ethyleneurea is white crystalline;
Reaction promoter: 0.01 part, can select the mixture that calcium sulfate, magnesium chloride form, and wherein, the mass ratio of calcium sulfate and magnesium chloride is 1:1.
In the present invention, ethyleneurea and reaction promoter are the chemical composition be carried on adsorbing agent carrier, adsorbing agent carrier should be selected specific area large and have the carrier of good adsorption properties, as the present embodiment mentions the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.When reality uses, adsorbing agent carrier is by its strong suction-operated, taste gas is had to adsorb by poisonous to the formaldehyde in air and other, formaldehyde is carried out chemical reaction by the ethyleneurea adsorbing rear and its load, change into nontoxic, the thorough removing of formaldehyde is realized after tasteless substance, the effect of reaction promoter is: can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, its practical effect is good.
The preparation method of the formaldehyde elimination agent that the present embodiment relates to comprises the steps:
(1) get the raw materials ready: take in 500g, 400 object attapulgite clays feeding thermostatic drying chambers and carry out drying, for subsequent use after dry 24h, choose the mixture of the ethyleneurea of solid powdery and calcium sulfate, magnesium chloride composition, ethyleneurea and the calcium sulfate of 25g, the mixture of magnesium chloride composition of 360g is taken respectively in the ratio of 0.144:0.01, the mixture that the ethyleneurea taken and calcium sulfate, magnesium chloride form is dissolved in the water of 100ml, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the attapulgite clay obtained after step (1) is dry puts into reactant solution, takes out after soaking 5h;
(3) dry: the attapulgite clay after soaking to be sent in vacuum drying oven, after dry 24h, prepares the formaldehyde elimination agent product of 575g.
The formaldehyde elimination agent product that the present embodiment obtains is detected, first, the evaporating dish of the formalin filling 100ml, 72mg/ml is put in drier, volatilize after 5h under room temperature, take out evaporating dish in drier, then put into the evaporating dish filling 4g formaldehyde elimination agent product and the beaker filling 100ml deionized water, with the concentration of formaldehyde in acetylacetone,2,4-pentanedione spectrophotometry deionized water after 24h, and calculating clearance, the formaldehyde clearance obtaining the present embodiment acquisition formaldehyde elimination agent product is as calculated 98.2%.
Embodiment 3:
The formaldehyde elimination agent that the present embodiment relates to is made up of following component: by ratio of quality and the number of copies,
Adsorbing agent carrier: 1 part, can select silica gel;
Ethyleneurea: 0.062 part can be the ethylenediamine of 1.5:1:0.5 by mol ratio, urea, water add in reactor, and heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, this ethyleneurea is white crystalline;
Reaction promoter: 0.009 part, can select calcium sulfate.
In the present invention, ethyleneurea and reaction promoter are the chemical composition be carried on adsorbing agent carrier, adsorbing agent carrier should be selected specific area large and have the carrier of good adsorption properties, as the present embodiment mentions the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.When reality uses, adsorbing agent carrier is by its strong suction-operated, taste gas is had to adsorb by poisonous to the formaldehyde in air and other, formaldehyde is carried out chemical reaction by the ethyleneurea adsorbing rear and its load, change into nontoxic, the thorough removing of formaldehyde is realized after tasteless substance, the effect of reaction promoter is: can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, its practical effect is good.
The preparation method of the formaldehyde elimination agent that the present embodiment relates to comprises the steps:
(1) get the raw materials ready: take in 500g, 350 object silica gel feeding thermostatic drying chambers and carry out drying, for subsequent use after dry 24h, choose ethyleneurea and the calcium sulfate of solid powdery, the ethyleneurea of 155g and the calcium sulfate of 22.5g is taken respectively in the ratio of 0.062:0.009, the ethyleneurea taken and calcium sulfate are dissolved in the water of 100ml, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: reactant solution put into by the silica gel obtained after step (1) is dry, takes out after soaking 4h;
(3) dry: the silica gel after soaking to be sent in vacuum drying oven, after dry 22h, prepares the formaldehyde elimination agent product of 535.5g.
The formaldehyde elimination agent product that the present embodiment obtains is detected, first, the evaporating dish of the formalin filling 100ml, 72mg/ml is put in drier, volatilize after 5h under room temperature, take out evaporating dish in drier, then put into the evaporating dish filling 4g formaldehyde elimination agent product and the beaker filling 100ml deionized water, with the concentration of formaldehyde in acetylacetone,2,4-pentanedione spectrophotometry deionized water after 24h, and calculating clearance, the formaldehyde clearance obtaining the present embodiment acquisition formaldehyde elimination agent product is as calculated 96.8%.
Embodiment 4:
The formaldehyde elimination agent that the present embodiment relates to is made up of following component: by ratio of quality and the number of copies,
Adsorbing agent carrier: 1 part, can select diatomite;
Ethyleneurea: 0.08 part can be the ethylenediamine of 1.5:1:0.5 by mol ratio, urea, water add in reactor, and heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, this ethyleneurea is white crystalline;
Reaction promoter: 0.008 part, can select the mixture that magnesium sulfate, magnesium chloride or calcium chloride form, wherein, and magnesium sulfate: magnesium chloride: calcium chloride=1:1:1.
In the present invention, ethyleneurea and reaction promoter are the chemical composition be carried on adsorbing agent carrier, adsorbing agent carrier should be selected specific area large and have the carrier of good adsorption properties, as the present embodiment mentions the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.When reality uses, adsorbing agent carrier is by its strong suction-operated, taste gas is had to adsorb by poisonous to the formaldehyde in air and other, formaldehyde is carried out chemical reaction by the ethyleneurea adsorbing rear and its load, change into nontoxic, the thorough removing of formaldehyde is realized after tasteless substance, the effect of reaction promoter is: can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, its practical effect is good.
The preparation method of the formaldehyde elimination agent that the present embodiment relates to comprises the steps:
(1) get the raw materials ready: take in 500g, 360 object diatomite feeding thermostatic drying chambers and carry out drying, for subsequent use after dry 24h, choose the ethyleneurea of solid powdery and the mixture of magnesium sulfate, magnesium chloride or calcium chloride composition, the mixture of the magnesium sulfate of the ethyleneurea of 200g and 20g, magnesium chloride or calcium chloride composition is taken respectively in the ratio of 0.08:0.008, the mixture of the ethyleneurea taken and magnesium sulfate, magnesium chloride or calcium chloride composition is dissolved in the water of 100ml, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the diatomite obtained after step (1) is dry puts into reactant solution, takes out after soaking 3.5h;
(3) dry: the diatomite after soaking to be sent in vacuum drying oven, after dry 24h, prepares the formaldehyde elimination agent product of 544g.
The formaldehyde elimination agent product that the present embodiment obtains is detected, first, the evaporating dish of the formalin filling 100ml, 72mg/ml is put in drier, volatilize after 5h under room temperature, take out evaporating dish in drier, then put into the evaporating dish filling 4g formaldehyde elimination agent product and the beaker filling 100ml deionized water, with the concentration of formaldehyde in acetylacetone,2,4-pentanedione spectrophotometry deionized water after 24h, and calculating clearance, the formaldehyde clearance obtaining the present embodiment acquisition formaldehyde elimination agent product is as calculated 98.7%.
Embodiment 5:
The formaldehyde elimination agent that the present embodiment relates to is made up of following component: by ratio of quality and the number of copies,
Adsorbing agent carrier: 1 part, can select attapulgite clay;
Ethyleneurea: 0.1 part can be the ethylenediamine of 1.5:1:0.5 by mol ratio, urea, water add in reactor, and heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, this ethyleneurea is white crystalline;
Reaction promoter: 0.0095 part, can select magnesium chloride.
In the present invention, ethyleneurea and reaction promoter are the chemical composition be carried on adsorbing agent carrier, adsorbing agent carrier should be selected specific area large and have the carrier of good adsorption properties, as the present embodiment mentions the one in active carbon, attapulgite clay, silica gel or diatomite, when practical application, except PARA FORMALDEHYDE PRILLS(91,95) has strong suction-operated, have taste gas also to have stronger suction-operated to the hydrogen sulfide in air, ammonia etc. are poisonous, practical effect is good.When reality uses, adsorbing agent carrier is by its strong suction-operated, taste gas is had to adsorb by poisonous to the formaldehyde in air and other, formaldehyde is carried out chemical reaction by the ethyleneurea adsorbing rear and its load, change into nontoxic, the thorough removing of formaldehyde is realized after tasteless substance, the effect of reaction promoter is: can play catalytic action when ethyleneurea and formaldehyde react, to improve the elimination factor of free formaldehyde, be proven, the use of this reaction promoter, the concentration of formaldehyde in indoor air can be made to be reduced to safe range rapidly, its practical effect is good.
The preparation method of the formaldehyde elimination agent that the present embodiment relates to comprises the steps:
(1) get the raw materials ready: take in 500g, 325 object attapulgite clays feeding thermostatic drying chambers and carry out drying, for subsequent use after dry 24h, choose ethyleneurea and the magnesium chloride of solid powdery, the ethyleneurea of 250g and the magnesium chloride of 23.75g is taken respectively in the ratio of 0.1:0.0095, the ethyleneurea taken and magnesium chloride are dissolved in the water of 100ml, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the attapulgite clay obtained after step (1) is dry puts into reactant solution, takes out after soaking 4.5h;
(3) dry: the attapulgite clay after soaking to be sent in vacuum drying oven, after dry 23h, prepares the formaldehyde elimination agent product of 554.75g.
The formaldehyde elimination agent product that the present embodiment obtains is detected, first, the evaporating dish of the formalin filling 100ml, 72mg/ml is put in drier, volatilize after 5h under room temperature, take out evaporating dish in drier, then put into the evaporating dish filling 4g formaldehyde elimination agent product and the beaker filling 100ml deionized water, with the concentration of formaldehyde in acetylacetone,2,4-pentanedione spectrophotometry deionized water after 24h, and calculating clearance, the formaldehyde clearance obtaining the present embodiment acquisition formaldehyde elimination agent product is as calculated 98.1%.
The above is only preferred embodiment of the present invention, and not do any pro forma restriction to the present invention, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present invention, all falls within protection scope of the present invention.
Claims (5)
1. a preparation method for indoor solid formaldehyde elimination agent, is characterized in that: described formaldehyde elimination agent forms primarily of the adsorbing agent carrier of load by ethyleneurea and reaction promoter, and the preparation method of described formaldehyde elimination agent comprises the steps:
(1) get the raw materials ready: adsorbing agent carrier is sent in thermostatic drying chamber, for subsequent use after dry, in (0.032 ~ 0.144): the ratio of (0.008 ~ 0.01) takes ethyleneurea and promoter respectively, the ethyleneurea taken and promoter are dissolved in water, reactant solution is obtained after stirring, for subsequent use;
(2) formaldehyde elimination agent is prepared: the adsorbing agent carrier obtained after step (1) is dry puts into reactant solution, takes out after soaking 3 ~ 5h;
(3) dry: the adsorbing agent carrier after soaking to be sent in vacuum drying oven, after dry 20 ~ 24h, prepares formaldehyde elimination agent product.
2. the preparation method of a kind of indoor solid formaldehyde elimination agent according to claim 1, it is characterized in that: in described step (2), count in mass ratio, described in put into the adsorbing agent carrier of reactant solution: ethyleneurea: reaction promoter=1:(0.16 ~ 0.72): (0.04 ~ 0.05).
3. the preparation method of a kind of indoor solid formaldehyde elimination agent according to claim 2, is characterized in that: described adsorbing agent carrier is the one in active carbon, attapulgite clay, silica gel or diatomite.
4. the preparation method of a kind of indoor solid formaldehyde elimination agent according to claim 2, it is characterized in that: described ethyleneurea by mol ratio be the ethylenediamine of 1.5:1:0.5, urea, water adds in reactor, heating and melting also stirs, after obtaining ethyleneurea paste, add water-soluble solution again, and after filtration, dry after obtain, described ethyleneurea is white crystalline.
5. the preparation method of a kind of indoor solid formaldehyde elimination agent according to claim 2, is characterized in that: described reaction promoter comprises the mixture of one or more compositions in magnesium sulfate, calcium sulfate, magnesium chloride or calcium chloride.
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| CN107983138A (en) * | 2017-11-15 | 2018-05-04 | 王军 | Load inorganic silica gel of aldehyde remover and preparation method thereof |
| CN114471488A (en) * | 2022-02-23 | 2022-05-13 | 辽宁大学 | Preparation method and application of modified activated carbon with ultrahigh formaldehyde adsorption capacity |
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Application publication date: 20150408 |