CN109851769A - A kind of refining methd and composition of low VOC polyether polyol - Google Patents
A kind of refining methd and composition of low VOC polyether polyol Download PDFInfo
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Abstract
The invention discloses the refining methds and composition of a kind of low VOC polyether polyol, polyether polyol is handled using the composition for including cation exchange resin and adsorbent, Na, K total amount is made and is lower than 5ppm, aldehyde is lower than the high-quality polyether polyol of 5ppm.Filter residue is handled simultaneously, realizes that ion exchange resin, aldehydes adsorbent recycle, while realizing the recycling of polyether polyol 95% in filter residue, greatly reduces solid waste generation, reduces enterprise to the processing cost of solid waste.
Description
Technical field
The present invention relates to the refining methds and composition of a kind of low VOC polyether polyol, belong to polyether polyol technology neck
Domain.
Background technique
Polyether polyol is by initiator (compound containing active hydrogen group) and ethylene oxide (EO), propylene oxide
(PO), epoxy butane (BO) etc. is made in the presence of basic catalyst through sudden reaction.Polyether polyol is production polyurethane material
The primary raw material of material.The small molecular weight impurity that alkali metal ion, side reaction in polyether polyol generate can be to polyurethane products
Performance and smell generate adverse effect, it is therefore desirable to refine to it.Current most commonly used process for refining is that acid is neutralized, inhaled
The process for refining of attached dose of absorption, dehydration crystallization, filtering.This technique there is a problem of obvious: 1, production link is more, production week
Phase is long；2, polyethers is easy to produce side reaction under acidic environment, generates aldehyde material (formaldehyde, acetaldehyde, methacrylaldehyde etc.), ketone object
The substances such as matter, allyl alcohol, these can bring very big smell to final product in product use；3, can contain in polyethers filter residue
There is the polyethers of 50-60%, this filter residue of generation belongs to dangerous solid waste, and a large amount of expense place to go is also required in the processing in later period
Reason.
Patent CN107987269A discloses the technique and its device of a kind of polyethers with resin cation purification alkali metal containing,
The invention reaches the technical effect of purification polyethers by the metal ion in cation resin exchange polyethers, does not use in phosphoric acid
With reduce the influence to environment, not generating dangerous solid waste in the process reduces three-protection design cost.But the cation tree used
Rouge purification is strong acid type cationic resin, inevitably causes polyethers that side reaction occurs, and generates aldehyde material.
Summary of the invention
To solve defect and deficiency present in above-mentioned polyethers refining methd, the present invention provides a kind of low VOC polyether polyols
The refining methd of alcohol, using the alkali metal ion in ion exchange resin treatment polyether polyol, adsorbent is to adsorb low point
The aldehyde compound of son amount, the two, which is used in compounding, is made low Na, K ion, the high-quality polyether polyol of low VOC content.Simultaneously
Filter residue is handled, realizes the recycling of ion exchange resin, adsorbent recycled with polyether polyol in filter residue.
The purpose of the present invention adopts the following technical scheme that realization.
A kind of refining methd of low VOC polyether polyol, comprising the following steps:
(1) purification of polyether polyol uses the composition pair of cation exchange resin and adsorbent in presence of water
Polyether polyol is handled, then is dehydrated, purification polyether polyol is obtained by filtration；
Wherein, adsorbent is that the aldehydes of amino-contained adsorbs resin, it is preferable that the partial size of cation exchange resin and adsorbent
It is different.
In a specific embodiment, the step (1) includes:
(A) polyether polyol to be refined is added in refining reaction kettle, polyether polyol quality 1.5-5.5% is added
Water, be added polyether polyol quality 1-3.5% ion exchange resin and adsorbent composition, N2It is warming up under atmosphere
70-110 DEG C, stirring and adsorbing 0.5-3.5h；
(B) vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 100-115 DEG C, simultaneously
Carry out N2Stripping, until moisture shuts down vacuum plant less than 0.05%；
(C) reaction kettle material is subjected to circulation filters pressing, Na, K total ion concentration is made and is less than 5ppm, aldehyde total amount is lower than 5ppm's
Polyether polyol.
Above-mentioned refining methd, the polyether polyol be by containing active hydrogen initiator and propylene oxide, ethylene oxide or
The reaction preparation under alkali metal catalysis of the two composition.
Above-mentioned refining methd, in step (1) cation exchange resin be weak-type cation exchange resin, strong-acid type sun from
Sub-exchange resin or both composition, preferably strongly acidic cation-exchange, 150~200 mesh of partial size, strong-acid type cation are handed over
Changing resin has: 732 cation exchange resins, 001x7 cation exchange resin.
Above-mentioned refining methd, adsorbent is that the aldehydes of amino-contained adsorbs resin, 50~100 mesh of partial size in step (1).One
In a embodiment, the aldehydes of amino-contained absorption resin be styrene, divinylbenzene, allyl amine in water in initiator and
It polymerize in the presence of perforating agent and is formed.Polymerization temperature is, for example, 60-95 DEG C.
The initiator can selected from one of peroxide initiator such as benzoyl peroxide, sodium peroxydisulfate etc. or
A variety of, perforating agent can be selected from n-hexane, benzene,toluene,xylene, pentane, normal heptane, octane, hexamethylene, cyclohexanone, toluene
It is cyclohexanone, chlorobenzene, dichloro-benzenes, methylene chloride, chloroform, carbon tetrachloride, trichloroethanes, methanol, ethyl alcohol, propyl alcohol, butanol, different
Propyl alcohol, isoamyl alcohol, hexanol, ethylene glycol, propylene glycol, butanediol, hexylene glycol, decanediol, succinic acid, adipic acid, decanedioic acid, the third three
Alcohol, ether, propylene oxide, petroleum ether, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, acetone, espeleton, first
One of base isobutyl ketone, butanone, glycol monoethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether etc. are a variety of.
In a preferred embodiment, the aldehydes absorption resin of the amino-contained is obtained by following preparation method, should
Method includes: by 95-110 parts of styrene, 40-55 parts of divinylbenzenes, 95-110 parts of allyl amines, 30-40 parts of perforating agents, 1-
1.5 parts of initiators, which are uniformly mixed, forms organic solution；2-5 parts of gelatin are dissolved in 250-350 parts of water, form water after dissolving completely
Solution；Organic solution is added in aqueous solution, stirring is opened, by adjusting rotational speed regulation partial size (such as be adjusted to 20-200 mesh,
It is preferred that 50-100 mesh, preparation method is emulsion polymerization, and organic solution is scattered in aqueous solution, the higher organic phase droplets grain of speed of agitator
Diameter is smaller, and the copolymer bead partial size of synthesis is smaller)；It is warming up to 60-90 DEG C, preferably 80-85 DEG C heat preservation (such as 1-6h, preferably
About 3h), 80-99 DEG C, preferably 85-95 DEG C are warming up to after heat preservation again, is kept the temperature (such as 1-6h, preferably from about 3h), filtering drying system
Obtain copolymer bead；After water washing (such as being washed 3 times with 80 DEG C of hot water), the aldehydes obtained by drying to amino-contained adsorbs tree
Rouge.
Above-mentioned refining methd, the composition of step (1) ion exchange resin and adsorbent, ion exchange resin account for composition
The 30-80wt% of gross mass, preferably 40-60wt%, adsorbent account for the 20-70wt% of composition gross mass, preferably 40-
60wt%.
Above-mentioned refining methd, water consumption is 1.5-5.5%, preferably 2-4% in step (1), is based on polyether polyol quality.
The composition dosage of above-mentioned refining methd, step (1) ion exchange resin and adsorbent is 1-3.5%, preferably
1.5-2.5% is based on polyether polyol quality.
Above-mentioned refining methd can further comprise:
(2) processing of filter residue is cleaned filtering gained filter residue in step (1) using organic solvent, filtered, filtrate is de-
Except solvent obtains recycling polyether polyol；Filter residue after cleaning dries screening, the cation exchange resin recycled and absorption
Agent；
(3) ion exchange resin isolated is through strong acid aqueous solution, preferred aqueous hydrochloric acid solution (such as 1-15wt% strong acid water
Solution such as aqueous hydrochloric acid solution) it impregnates, then neutral recycling is washed to high-purity；Adsorbent is in strong acid aqueous solution, preferably hydrochloric acid
The aldehyde compound of hydrolysis removing absorption, is used after washing in aqueous solution (such as 1-15wt% strong acid aqueous solution such as aqueous hydrochloric acid solution)
Aqueous alkali impregnates, and is washed with water to neutrality, the aldehydes adsorbent recycled.
In a more specific embodiment, above-mentioned refining methd further comprises following steps:
(a) organic solvent is added in cleaning kettle, puts into filter residue into kettle under agitation, investment filter residue amount occupies machine
The 5-40% of solvent quality heats up 30-60 DEG C, stirs 20-90min.
(b) material in cleaning kettle is filtered, filtrate refills in cleaning kettle and is recycled 4-8 times, filtrate removing
The polyether polyol recycled after organic solvent, recycling polyether polyol are re-entered refining kettle and are refined；
(c) filter residue is dried, is sieved using aperture 100-150 mesh sieve, respectively obtain cation exchange resin and
Adsorbent (oversize is ion exchange resin, and screenings is adsorbent)；
(d) cation exchange resin isolated is impregnated through aqueous hydrochloric acid solution (such as 1-15wt%- aqueous hydrochloric acid solution), then
Neutral recycling is washed to high-purity；
(e) aldehydes of adsorbent hydrolysis removing absorption in aqueous hydrochloric acid solution (such as 1-15wt%- aqueous hydrochloric acid solution)
Object is closed, is impregnated after washing with aqueous alkali, then be washed to neutrality with high-purity.
Above-mentioned filter residue processing method, organic solvent is one of alcohols, ethers, halogenated hydrocarbons or a variety of in step (a), excellent
Select ethyl alcohol.
Above-mentioned filter residue processing method, filtrate refills in cleaning kettle and 4-8 times, preferably 5-7 is recycled in step (b)
It is secondary.
The invention further relates to a kind of compositions for the purification of low VOC polyether polyol comprising:
The composition of cation exchange resin and adsorbent, cation exchange resin account for the 30- of composition gross mass
80wt%, preferably 40-60wt%, adsorbent account for the 20-70wt% of composition gross mass, preferably 40-60wt%, wherein absorption
Agent is that the aldehydes of amino-contained adsorbs resin, it is preferable that cation exchange resin is different from the partial size of adsorbent.By will be cationic
Exchanger resin and adsorbent, which are simply mixed, can prepare the composition.
Cation exchange resin is weak-type cation exchange resin, strongly acidic cation-exchange or both combination
Object, preferably strongly acidic cation-exchange.
150~200 mesh of cation exchange resin preferable particle size, 50~100 mesh of adsorbent preferable particle size.
This method has the beneficial effect that:
(1) compared to traditional process for refining, process for refining provided by the invention does not have N-process, simplifies process procedure,
Shorten the production cycle.
(2) aldehydes adsorbent is used, aldehyde in polyether polyol is effectively reduced.
(3) filter residue is handled, realizes that ion exchange resin, aldehydes adsorbent recycle, while realizing filter residue
The recycling of middle polyether polyol 95% greatly reduces solid waste generation, reduces enterprise to the processing cost of solid waste.
Specific embodiment
The present invention is described further with reference to embodiments.
Preparation example
The preparation of the aldehydes absorption resin of amino-contained
100g styrene is added in beaker, 50g divinylbenzene, 100g allyl amine, 2g benzoyl peroxide, 40g is just
Hexane stirs 20 minutes, forms organic solution；300g water is added in three-necked flask, 5g Gelatin is put into, is formed water-soluble
Liquid；Organic solution is added in aqueous solution, stirring is opened, rotational speed regulation partial size is adjusted in 50-100 mesh, heats up 83 DEG C and keep the temperature 3h,
It is warming up to 95 DEG C of heat preservation 3h again, copolymer bead is made in filtering drying；Using 80 DEG C water washing 3 times, partial size obtained by drying is in 50-
The aldehydes of the amino-contained of 100 mesh adsorbs resin.
Embodiment (1) refines polyether polyol a
The synthesis of polyether polyol a: 184g glycerol, 3.6g potassium hydroxide, in 95 DEG C of conditions are added in 2L stainless steel kettle
Lower decompression water removal under 110 DEG C, 4kg pressure condition, is reacted after test moisture is qualified with 1060g propylene oxide, de- through aging
The polyether polyol of molecular weight 600 is made after list.
1kg polyether polyol a is added in refining reaction kettle, 20g water is added, 732 cation exchange trees of 15g are added
The composition (ion exchange resin account for composition gross mass 40%) of the aldehydes of rouge and amino-contained absorption resin, N2It is risen under atmosphere
Temperature is to 85 DEG C, stirring and adsorbing 1h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 103
DEG C, while carrying out N2Stripping, until moisture shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, is obtained
Refine polyether polyol.
Embodiment (2) refines polyether polyol a
1kg polyether polyol a is added in refining reaction kettle, 20g water is added, 20g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 50%) is warming up to 90 DEG C under N2 atmosphere, stirring and adsorbing
1.5h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 103 DEG C, while carrying out N2Vapour
It mentions, until moisture shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (3) refines polyether polyol a
1kg polyether polyol a is added in refining reaction kettle, be added 20g water, be added 25g cation exchange resin and
The composition (ion exchange resin account for composition gross mass 60%) of adsorbent, N295 DEG C are warming up under atmosphere, stirring and adsorbing
2h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2Stripping,
Vacuum plant is shut down less than 0.05% to moisture.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Comparative example (1) refines polyether polyol a
1kg polyether polyol a is added in refining reaction kettle, 20g water is added, 85% phosphoric acid of 4g is added, carries out N2It sets
After changing, 85 DEG C of stirring 1h are warming up to, 3g magnesium silicate is added, stirring and adsorbing 1h is warming up to 105 DEG C of dehydrations to 0.05 mistake of moisture <
Filter.The method is that polyethers refines conventional method.
Comparative example (2) refines polyether polyol a
1kg polyether polyol a is added in refining reaction kettle, 20g water is added, 732 cation exchange trees of 15g are added
Rouge, N285 DEG C are warming up under atmosphere, stirring and adsorbing 1h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle,
Temperature maintains 103 DEG C, while carrying out N2Stripping, until moisture shuts down vacuum plant less than 0.05%.Reaction kettle material is followed
Ring filters pressing obtains purification polyether polyol.
Comparative example (3) refines polyether polyol a
1kg polyether polyol a is added in refining reaction kettle, 20g water is added, 732 cation exchange trees of 15g are added
Rouge and 3g magnesium silicate, N285 DEG C are warming up under atmosphere, stirring and adsorbing 1h.Vacuum plant dehydration is opened, vacuum degree is small in reaction kettle
In -0.09Mpa, temperature maintains 103 DEG C, while carrying out N2Stripping, until moisture shuts down vacuum plant less than 0.05%.By reaction kettle
Material carries out circulation filters pressing, obtains purification polyether polyol.
Table 1 refines polyether polyol a performance indicator
| Comparative example 1 | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Total aldehyde content mg/kg | 30.3 | 4.3 | 4.1 | 3.5 |
| Na content mg/kg | 1 | 0 | 0 | 0 |
| K content mg/kg | 4 | 2 | 2 | 1 |
Embodiment (4) refines polyether polyol b
The synthesis of polyether polyol b: polyether polyol a (Mn600) 150g, 4.9g hydroxide is added in 2L stainless steel kettle
Potassium depressurizes water removal, after test moisture is qualified, under 110 DEG C, 4kg pressure condition, with 1475g propylene oxide under the conditions of 95 DEG C
The polyether polyol of molecular weight 6000 is made in reaction after aging takes off list.
1kg polyether polyol b is added in refining reaction kettle, 30g water is added, 15g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 50%), N290 DEG C are warming up under atmosphere, stirring and adsorbing
1.5h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 vapour
It mentions, until moisture shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (5) refines polyether polyol b
1kg polyether polyol b is added in refining reaction kettle, 30g water is added, 20g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 60%), N295 DEG C are warming up under atmosphere, stirring and adsorbing 2h.
Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 stripping, until water
Divide and shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (6) refines polyether polyol b
1kg polyether polyol b is added in refining reaction kettle, 30g water is added, 25g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 40%) is warming up to 85 DEG C under N2 atmosphere, stirring and adsorbing 1h.
Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 stripping, until water
Divide and shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Comparative example (2) refines polyether polyol b
The specific same comparative example of subtractive process (1).
Table 2 refines polyether polyol b performance indicator
| Comparative example 2 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| Total aldehyde content mg/kg | 32.3 | 3.3 | 3.9 | 4.4 |
| Na content mg/kg | 1 | 0 | 0 | 0 |
| K content mg/kg | 3 | 3 | 1 | 1 |
Embodiment (7) refines polyether polyol c
The synthesis of polyether polyol c: sorbierite 182g, 4.8g potassium hydroxide, in 95 DEG C of items are added in 2L stainless steel kettle
Water removal is depressurized under part under 110 DEG C, 4kg pressure condition, to react with 1450g propylene oxide, through aging after test moisture is qualified
The polyether polyol of molecular weight 1400 is made after de- list.
Polyether polyol (Mn1400) 175g, 4.9g potassium hydroxide is added in 2L stainless steel kettle, subtracts under the conditions of 95 DEG C
Pressure water removal under 110 DEG C, 4kg pressure condition, is reacted, after aging takes off list after test moisture is qualified with 1450g propylene oxide
The polyether polyol of molecular weight 12000 is made.
1kg polyether polyol c is added in refining reaction kettle, 40g water is added, 15g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 50%) is warming up to 95 DEG C under N2 atmosphere, stirring and adsorbing 2h.
Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 stripping, until water
Divide and shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (8) refines polyether polyol c
1kg polyether polyol b is added in refining reaction kettle, 40g water is added, 20g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 60%) is warming up to 85 DEG C under N2 atmosphere, stirring and adsorbing 1h.
Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 stripping, until water
Divide and shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (9) refines polyether polyol c
1kg polyether polyol b is added in refining reaction kettle, 30g water is added, 25g ion exchange resin and suction is added
Attached dose of composition (ion exchange resin account for composition gross mass 40%) is warming up to 90 DEG C under N2 atmosphere, stirring and adsorbing
1.5h.Vacuum plant dehydration is opened, vacuum degree is less than -0.09Mpa in reaction kettle, and temperature maintains 105 DEG C, while carrying out N2 vapour
It mentions, until moisture shuts down vacuum plant less than 0.05%.Reaction kettle material is subjected to circulation filters pressing, obtains purification polyether polyol.
Embodiment (10) refines polyether polyol c
The specific same embodiment of subtractive process (3), the difference is that cation exchange resin, adsorbent use recycling again
Raw cation exchange resin and adsorbent.
Embodiment (11)
The filter residue of embodiment (9) is handled.Ethyl alcohol is added in cleaning kettle, under agitation, puts into ethyl alcohol matter
The filter residue of amount 20% is warming up to 40 DEG C, stirs 30min, filtering, filter residue drying.Polyether polyol c in filter residue before test is cleaned
Content is 55%, and the residual quantity of polyether polyol c is 1% in filter residue after cleaning, the polyether polyol rate of recovery 98.1%.
Filter residue separates it using 150 mesh sieve, isolated ion exchange resin and adsorbent.It isolates
Ion exchange resin impregnates 5h through 5% aqueous hydrochloric acid solution under the conditions of 50 DEG C, then is washed to neutral recycling with high-purity.Absorption
Agent hydrolyzes full gear 5h under the conditions of 50 DEG C in 5% aqueous hydrochloric acid solution, then impregnates 2h, high-purity washing with 5% sodium hydrate aqueous solution
It is recycled to neutrality.
Embodiment (12)
The filter residue of embodiment (9) is handled.The wash filtrate for being recycled 5 times is added in cleaning kettle, is being stirred
Under the conditions of, the filter residue of wash filtrate quality 20% is put into, is warming up to 40 DEG C, stirs 30min, filtering, filter residue drying.Test cleaning
The content of polyether polyol c is 55% in preceding filter residue, and the residual quantity of polyether polyol c is 1.5% in filter residue after cleaning, and polyethers is more
First alcohol rate of recovery 97.2%.Filter residue separates it using 150 mesh sieve, isolated ion exchange resin and absorption
Agent.The ion exchange resin isolated impregnates 5h through 5% aqueous hydrochloric acid solution under the conditions of 50 DEG C, then is washed to neutral return with high-purity
Receipts are used again.Adsorbent hydrolyzes full gear 5h under the conditions of 50 DEG C in 5% aqueous hydrochloric acid solution, then is impregnated with 5% sodium hydrate aqueous solution
2h, it is high-purity to be washed to neutral recycling.
Embodiment (13)
It is refined refining reaction kettle is re-entered after the filtrate removing ethyl alcohol of embodiment (12), specific subtractive process is same
Embodiment (9).
Comparative example (3) refines polyether polyol c
The specific same comparative example of subtractive process (1).
Table 3 refines polyether polyol c performance indicator.
Claims (10)
1. a kind of refining methd of low VOC polyether polyol, comprising the following steps:
(1) purification of polyether polyol: in presence of water using the composition pair for including cation exchange resin and adsorbent
Polyether polyol is handled, then is dehydrated, purification polyether polyol is obtained by filtration；
Wherein, adsorbent is that the aldehydes of amino-contained adsorbs resin, it is preferable that the partial size of cation exchange resin and adsorbent is not
Together.
2. refining methd according to claim 1, further comprises:
(2) processing of filter residue: filtering gained filter residue in step (1) is cleaned using organic solvent, is filtered, filtrate removing is molten
Agent obtains recycling polyether polyol；Filter residue after cleaning dries screening, the cation exchange resin and adsorbent recycled；
(3) cation exchange resin isolated is through strong acid aqueous solution, and preferably aqueous hydrochloric acid solution impregnates, then be washed with deionized water to
Neutrality recycling；Adsorbent is in strong acid aqueous solution, the aldehyde compound of hydrolysis removing absorption, washing preferably in aqueous hydrochloric acid solution
It is impregnated, is washed with water to neutrality with aqueous alkali afterwards, the aldehydes adsorbent recycled.
3. the refining methd of polyether polyol according to claim 1 or 2, it is characterised in that cation is handed in step (1)
Changing resin is weak-type cation exchange resin, strongly acidic cation-exchange or both group, and preferably strong-acid type cation is handed over
Change resin, partial size 150-200 mesh；And/or
The partial size of the aldehydes absorption resin of amino-contained is 50-100 mesh in step (1).
4. the refining methd of polyether polyol according to any one of claim 1-3, which is characterized in that the aldehyde of amino-contained
It is that styrene, divinylbenzene, allyl amine polymerize in the presence of initiator and perforating agent in water and formed that class, which adsorbs resin,
's；
Preferably, the aldehydes absorption resin of the amino-contained is obtained by following preparation method: by 95-110 parts of styrene, 40-
55 parts of divinylbenzenes, 95-110 parts of allyl amines, 30-40 parts of perforating agents, 1-1.5 parts of initiators be uniformly mixed formed it is organic molten
Liquid；2-5 parts of gelatin are dissolved in 250-350 parts of water, form aqueous solution after dissolving completely；Organic solution is added in aqueous solution,
Stirring is opened, by adjusting rotational speed regulation partial size；It is warming up to 60-90 DEG C, and preferably 80-85 DEG C heat preservation (general 1-6h, preferably from about
3h), 80-99 DEG C is warming up to after heat preservation again, preferably 85-95 DEG C heat preservation (general 1-6h, preferably from about 3h), filtering drying is made altogether
Polymers bead；After water washing, the aldehydes obtained by drying to amino-contained adsorbs resin.
5. the refining methd of polyether polyol described in any one of -4 according to claim 1, it is characterised in that step (1) middle-jiao yang, function of the spleen and stomach
Ion exchange resin accounts for the 30-80wt% of composition, preferably 40-60wt%, and adsorbent accounts for the 20-70wt% of composition, preferably
40-60wt%；And/or
Composition additive amount is the 1.0-3.5%, preferably 1.5-2.5% of polyether polyol gross mass in step (1).
6. the refining methd of polyether polyol according to any one of claims 1-5, it is characterised in that water in step (1)
Additive amount is the 1.5-5.5%, preferably 2-4% of polyether polyol gross mass.
7. the refining methd of polyether polyol according to claim 1 to 6, it is characterised in that group in step (1)
Closing object is 0.5-3.5h, preferably 1-2h to the polyether polyol processing time；And/or
Composition is 70-110 DEG C, preferably 85-95 DEG C to polyether polyol treatment temperature in step (1)；And/or
It is 100-150 mesh that sieve aperture used is sieved in step (2).
8. a kind of composition for the purification of low VOC polyether polyol comprising: the combination of cation exchange resin and adsorbent
Object, cation exchange resin account for the 30-80wt% of composition gross mass, preferably 40-60wt%, and adsorbent accounts for composition gross mass
20-70wt%, preferably 40-60wt%, wherein adsorbent be amino-contained aldehydes adsorb resin.
9. composition according to claim 8, which is characterized in that cation exchange resin is weak-type cation exchange tree
Rouge, strongly acidic cation-exchange or both combination, preferably strongly acidic cation-exchange.
10. composition according to claim 8 or claim 9, which is characterized in that the aldehydes of amino-contained absorption resin be styrene,
Divinylbenzene, allyl amine polymerize in the presence of initiator and perforating agent in water and are formed；
Preferably, the aldehydes absorption resin of the amino-contained is obtained by following preparation method: by 95-110 parts of styrene, 40-
55 parts of divinylbenzenes, 95-110 parts of allyl amines, 30-40 parts of perforating agents, 1-1.5 parts of initiators be uniformly mixed formed it is organic molten
Liquid；2-5 parts of gelatin are dissolved in 250-350 parts of water, form aqueous solution after dissolving completely；Organic solution is added in aqueous solution,
Stirring is opened, by adjusting rotational speed regulation partial size；It is warming up to 60-90 DEG C, and preferably 80-85 DEG C heat preservation (general 1-6h, preferably from about
3h), 80-99 DEG C is warming up to after heat preservation again, preferably 85-95 DEG C heat preservation (general 1-6h, preferably from about 3h), filtering drying is made altogether
Polymers bead；After water washing, the aldehydes obtained by drying to amino-contained adsorbs resin.
Priority Applications (1)
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