CN1706787A - Polymerization inhibiting method for (methyl) acryl aldehyde - Google Patents
Polymerization inhibiting method for (methyl) acryl aldehyde Download PDFInfo
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Abstract
The polymerization inhibiting method for (methyl) acryl aldehyde and its derivative features that polymerization inhibitor is added into material containing (methyl) acryl aldehyde and its derivative to inhibit polymerization of (methyl) acryl aldehyde and its derivative during various physical or chemical treatment, storing, transportation and use. The polymerization inhibitor is one kind of mixture compounded with at least one kind of N-alkoxyl piperidine compounds and one or several of phenol compounds and phenothiazine compounds. The method of the present invention can eliminate polymerization of (methyl) acryl aldehyde and its derivative during various physical or chemical treatment, storing, transportation and use radically.
Description
Technical field
The present invention relates to the anti-polymerization method of (methyl) propenal and derivative thereof, specifically, the present invention relates to a small amount of stopper of a kind of interpolation to prevent that (methyl) propenal and derivative thereof are in the method for producing, take place in various physical chemistry processing, accumulating or the use autohemagglutination.
Background technology
(methyl) propenal and derivative thereof are in industrial application more and more widely.Propenal is mainly used in acrylic acid synthesizing and ester thereof, livestock and poultry methionine feed, glutaraldehyde disinfectant, Poly(Trimethylene Terephthalate) (PTT) raw material 1 as raw material, ammediol, medicine intermediate pyridine and quinoline and spices ligustral and Lan Ling aldehyde etc., in addition, propenal itself also is a kind of sterilant fast and efficiently.Methylacrylaldehyde is mainly used in synthesize methyl acrylic acid and ester thereof as raw material, is further used for producing fine chemical products such as synthetic glass, plastic modifier, senior environmental protection coating material and binding agent.
(methyl) propenal and derivative thereof have such characteristic, promptly meet light, heat and superoxide and are easy to cause the strong polymerization of himself.Therefore, when (methyl) propenal and derivative thereof in synthetic and treating process, its maximum problem is the Raolical polymerizable that comes from this class material, make capacity of equipment reduce owing to produce a large amount of polymkeric substance, even stop up, force equipment out of service and clean, influenced normally carrying out of producing, reduced production efficiency.These phenomenons become very large obstacle in (methyl) propenal and the derivative preparation process thereof, and it is very important therefore suppressing its polymerization in industrial production.In addition,, cause quality product to descend, brought a lot of unfavorable factors for the use of product and the preparation of derivative because the unstable and the Yi Juxing of (methyl) propenal and derivative itself thereof make its unstable product quality when storing or transport.
In order to overcome above-mentioned aggregation problem, people often add one or more stoppers to prevent producing polymerization in its production and the storage and transport process in the material that contains (methyl) propenal and derivative thereof or in the straight product, for example chain transfer type stopper (as quinhydrones, hydroquinone monomethyl ether, thiodiphenylamine), metal-salt type stopper (as copper dibutyldithiocarbamate, copper sulfate) or free radical type stopper are (as N--oxyl-2,2,6,6-tetramethyl piperidine compounds).
What use was more in the tradition is with the stopper of phenolic compound (quinhydrones, hydroquinone monomethyl ether) as (methyl) propenal and derivative thereof, but this class stopper can not reduce the formation of polymkeric substance effectively in the rectification and purification process, generally is could suppress polymerization effectively under the situation that aerobic exists.In addition, metal-salt or N--oxyl piperidine compounds itself are undesirable for (methyl) propenal and derivative purified polymerization inhibition effect thereof.CN1403432A has described and has used the stopper of single nitro-derivative as propenal (〉=95 weight %), the embodiment that introduces in the patent to be 20 hours with the poly-test-results of interior resistance, and the effectively anti-poly-time of this stopper is too short, and industrial application is had little significance.The present invention is prolonged the induction period in polymerization of (methyl) propenal material by adopting the novel built stopper greatly, more than 1000 hours, can satisfy the needs of industrial application, production and storing fully.
Summary of the invention
The objective of the invention is to significantly improve (methyl) propenal and derivative thereof preparation, deposit or transportation in stability, especially anti-poly-in the rectification and purification process.Just can reach good polymerization inhibition effect by in (methyl) propenal and derivative material thereof, adding a spot of stopper.
For achieving the above object, method of the present invention is that to select more than one N--oxyl piperidine compounds and the compound of selecting more than one from phenols or phenothiazine polymerization inhibitor to carry out composite, and as the stopper of (methyl) propenal and derivative thereof.
Specific N--oxyl piperidine compounds is the good N--oxyl-4-hydroxyl-2,2,6 of polymerization inhibition effect among the present invention, a kind of in 6-tetramethyl piperidine or tricresyl phosphite (N--oxyl-2,2,6, the 6-tetramethyl piperidine) ester.Used phenolic compound is quinhydrones, hydroquinone monomethyl ether.When N--oxyl piperidine compounds when being used in combination with chain transfer type stopper quinhydrones or thiodiphenylamine polymerization inhibition effect clearly, especially three kinds of composite uses of compound of N--oxyl piperidine compounds and phenols and thiodiphenylamine can reach the polymerization inhibition effect of highly significant.
Another object of the present invention is that the material that contains (methyl) propenal and derivative thereof is prevented gathering, it is characterized in that in (methyl) propenal and derivative material thereof, adding a small amount of above-mentioned compound polymerization inhibitor, the amount of the compound polymerization inhibitor that adds can change in very wide scope, general add-on is the 10～10000ppm (weight) of (methyl) propenal and derivative material thereof, be preferably 40-4000ppm (weight), wherein chain transfer type stopper (phenols is or/and thiodiphenylamine) is composite in the ratio of 100: 1～1: 100 weight ratio with N--oxyl piperidine compounds, is preferably 10: 1～1: 10 weight ratio.
Stopper of the present invention is pressed powder, they can fully be dissolved in propenal and the derivative material thereof, therefore addition means is not particularly limited, and both can directly add pressed powder, also can add with solution state with pure (methyl) propenal and derivative dissolving back thereof.
Embodiment
Describe content of the present invention in detail with specific embodiment below, and unrestricted its scope of invention.The ppm of unit in embodiment and the comparative example all represents with weight; The ACL that abbreviates as of each compound represents acetaldehyde, and ACR represents propenal, MAL represent methylidene propenal, PRL represents propionic aldehyde, and HQ represents quinhydrones, and MQ represents hydroquinone monomethyl ether, PZ represents thiodiphenylamine, and AI-61A represents copper sulfate, and AI-61R represents dithiocarbamic acid copper, ZJ-701 represents N--oxyl-4-hydroxyl-2,2,6,6-tetramethyl piperidine, ZJ-705 are represented tricresyl phosphite (N--oxyl-2,2,6, the 6-tetramethyl piperidine) ester.
Embodiment 1-7
In the 25ml horminess glass tube, the propenal liquid (mixture of about 95% propenal and 3% water and 2% acetaldehyde) of stopper is removed in the distillation in advance of packing into, add the stopper of 50ppm then in the test tube, place 45 ℃ thermostat water bath, the observation induction period in polymerization.The binary built stopper of HQ or PZ and ZJ-705 or ZJ-701 sees Table 1 to the test-results of propenal, and HQ, PZ and ZJ-705 or ZJ-701 ternary composite polymerzation inhibitor the results are shown in Table 2 to acrolein test.
Table 1HQ or PZ and ZJ-705 or ZJ-701 binary built stopper are to the polymerization inhibition effect of propenal sample
| Embodiment | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??ACL | ??ACR | ??H 2O | |||||
| ??1 | ??1.4350 | ??95.7958 | ??2.7679 | ??HQ+ZJ-701 | ??25+25 | ??45 | ??1579 |
| ??2 | ??1.4350 | ??95.7958 | ??2.7679 | ??HQ+ZJ-705 | ??25+25 | ??45 | ??1579 |
| ??3 | ??1.4350 | ??95.7958 | ??2.7679 | ??PZ+ZJ-701 | ??25+25 | ??45 | ??1555 |
| ??4 | ??1.4350 | ??95.7958 | ??2.7679 | ??PZ+ZJ-705 | ??25+25 | ??45 | ??763 |
Table 2HQ, PZ and ZJ-705 or ZJ-701 ternary built stopper are to the polymerization inhibition effect of propenal sample
| Embodiment | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??ACL | ??ACR | ??H 2O | |||||
| ??5 | ??1.4350 | ??95.7958 | ??2.7679 | ??ZJ-701+HQ+PZ | ??25+15+10 | ??45 | ??1870 |
| ??6 | ??1.4350 | ??95.7958 | ??2.7679 | ??ZJ-705+HQ+PZ | ??25+15+10 | ??45 | ??1750 |
| ??7 | ??1.4350 | ??95.7958 | ??2.7679 | ??ZJ-701+HQ+PZ | ??25+20+5 | ??45 | ??1680 |
From embodiment 1-7 as can be seen, HQ, PZ, ZJ-705, ZJ-701 binary or ternary built stopper are fine to the polymerization inhibition effect of propenal, and induction period in polymerization is long, all more than 760 hours, especially the ternary built effect is better, and inductive phase is the longest can to reach 1870 hours.
Comparative example 1-6
Experiment condition is with embodiment 1-7.Use single stopper HQ, MQ, PZ, AI-61A, AI-61R or ZJ-705 that the polymerization inhibition effect of propenal is seen Table 3.
The single stopper of table 3 is to the polymerization inhibition effect of propenal sample
| Comparative example | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??ACL | ??ACR | ??H 2O | |||||
| ??1 | ??1.4350 | ??95.7958 | ??2.7679 | ??ZJ-705 | ??50 | ??45 | ??64 |
| ??2 | ??1.4350 | ??95.7958 | ??2.7679 | ??HQ | ??50 | ??45 | ??568 |
| ??3 | ??1.4350 | ??95.7958 | ??2.7679 | ??MQ | ??50 | ??45 | ??400 |
| ??4 | ??1.4350 | ??95.7958 | ??2.7679 | ??PZ | ??50 | ??45 | ??520 |
| ??5 | ??1.4350 | ??95.7958 | ??2.7679 | ??AI-61R | ??50 | ??45 | ??640 |
| ??6 | ??1.4350 | ??95.7958 | ??2.7659 | ??AI-61A | ??50 | ??45 | ??256 |
As can be seen from Table 3, in single stopper, HQ, PZ, AI-61A demonstrate the poly-stability of resistance preferably, and induction period in polymerization is longer, and polymerization effect such as AI-61A, ZJ-705 are poor, descend greatly for 1 inductive phase than embodiment, and polymerization inhibition effect is relatively poor.
Comparative example 7-10
Experiment condition is with embodiment 1-7, and under identical experiment condition, AI-61A, AI-61R, HQ or PZ binary composite polymerzation inhibitor see Table 4 to the experimental result of propenal.
Table 4HQ, PZ and AI-61A or AI-61R binary stopper are to the polymerization inhibition effect of propenal sample
| Comparative example | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??ACL | ??ACR | ??H 2O | |||||
| ??7 | ??1.4350 | ??95.7958 | ??2.7679 | ??AI-61A+PZ | ??25+25 | ??45 | ??475 |
| ??8 | ??1.4350 | ??95.7958 | ??2.7679 | ??AI-61R+HQ | ??25+25 | ??45 | ??403 |
| ??9 | ??1.4350 | ??95.7958 | ??2.7679 | ??AI-61R+PZ | ??25+25 | ??45 | ??235 |
| ??10 | ??1.4350 | ??95.7958 | ??2.7679 | ??HQ+PZ | ??25+25 | ??45 | ??811 |
From experimental result as can be seen, the composite stopper of mantoquita is compared obviously improvement of nothing with the comparative example 1-6 of the single stopper of use in the polymerization experiment of propenal.
Embodiment 8-14
In the 25ml horminess glass tube, the Methylacrylaldehyde liquid (mixture of about 95% Methylacrylaldehyde and 2% water and 3% acetaldehyde) of stopper is removed in the distillation in advance of packing into, add the stopper of 50ppm then in the test tube, place 65 ℃ thermostat water bath, the observation induction period in polymerization.The binary built stopper of HQ or PZ and ZJ-705 or ZJ-701 sees Table 5 to the test-results of Methylacrylaldehyde, and HQ, PZ and ZJ-705 or ZJ-701 ternary composite polymerzation inhibitor see Table 6 to the test-results of Methylacrylaldehyde.
Table 5HQ or PZ and ZJ-705 or ZJ-701 binary built stopper are to the polymerization inhibition effect of Methylacrylaldehyde sample
| Embodiment | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??PRL | ??MAL | ??H 2O | |||||
| ??8 | ??2.3320 | ??95.8995 | ??1.7685 | ??HQ+ZJ-701 | ??25+25 | ??65 | ??1785 |
| ??9 | ??2.3320 | ??95.8995 | ??1.7685 | ??HQ+ZJ-705 | ??25+25 | ??65 | ??1756 |
| ??10 | ??2.3320 | ??95.8995 | ??1.7685 | ??PZ+ZJ-701 | ??25+25 | ??65 | ??1726 |
| ??11 | ??2.3320 | ??95.8995 | ??1.7685 | ??PZ+ZJ-705 | ??25+25 | ??65 | ??1036 |
Table 6HQ, PZ and ZJ-705 or ZJ-701 ternary built stopper are to the polymerization inhibition effect of Methylacrylaldehyde sample
| Embodiment | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??PRL | ??MAL | ??H 2O | |||||
| ??12 | ??2.3320 | ??95.8995 | ??1.7685 | ??ZJ-701+HQ+PZ | ??25+15+10 | ??65 | ??2130 |
| ??13 | ??2.3320 | ??95.8995 | ??1.7685 | ??ZJ-705+HQ+PZ | ??25+15+10 | ??65 | ??2070 |
| ??14 | ??2.3320 | ??95.8995 | ??1.7685 | ??ZJ-701+HQ+PZ | ??25+20+5 | ??65 | ??1985 |
From embodiment 8-14 as can be seen, HQ, PZ, ZJ-705, ZJ-701 binary or ternary built stopper are fine to the polymerization inhibition effect of Methylacrylaldehyde, and induction period in polymerization is long, all more than 1000 hours, especially the ternary built effect is better, and inductive phase is the longest can to reach 2130 hours.
Comparative example 11-16
Experiment condition uses single stopper HQ, MQ, PZ, AI-61A, AI-61R or ZJ-705 that the Methylacrylaldehyde polymerization inhibition effect is seen Table 7 with embodiment 8-14.
The single stopper of table 7 is to the polymerization inhibition effect of Methylacrylaldehyde sample
| Comparative example | Sample is formed (wt%) | The stopper type | Inhibitor concentration (ppm) | Experimental temperature (℃) | Inductive phase (hr) | ||
| ??PRL | ??MAL | ??H 2O | |||||
| ??11 | ??2.3320 | ??95.8995 | ??1.7685 | ??ZJ-705 | ??50 | ??65 | ??250 |
| ??12 | ??2.3320 | ??95.8995 | ??1.7685 | ??HQ | ??50 | ??65 | ??650 |
| ??13 | ??2.3320 | ??95.8995 | ??1.7685 | ??MQ | ??50 | ??65 | ??580 |
| ??14 | ??2.3320 | ??95.8995 | ??1.7685 | ??PZ | ??50 | ??65 | ??700 |
| ??15 | ??2.3320 | ??95.8995 | ??1.7685 | ??AI-61R | ??50 | ??65 | ??820 |
| ??16 | ??2.3320 | ??95.8995 | ??1.7685 | ??AI-61A | ??50 | ??65 | ??400 |
As can be seen from Table 7, in single stopper, HQ, MQ, PZ, AI-61A have the poly-stability of resistance preferably, induction period in polymerization is longer, and that polymerization effect such as AI-61A, ZJ-705 compare is relatively poor, descends greatly inductive phase than embodiment 8-14, and polymerization inhibition effect is relatively poor.
Embodiment 15
40 blocks of stainless steel column plates are housed at interval in the rectifying tower of 300mm interior, cat head distillates pipe, is feed-pipe at the bottom of the tower, keeps at the tower still carrying out fractionation by distillation propenal product under 90-95 ℃ the situation.Use the HQ+ZJ-701 compound polymerization inhibitor, HQ is that 100ppm, ZJ-701 are 200ppm, from cat head compound polymerization inhibitor is added the distillate, and continuous operation is after 7 days, and no polymkeric substance produces in the parking checking, tower.
Comparative Examples 17
Experiment condition is with embodiment 15, stopper adopts single ZJ-701 300ppm, turn round after three days, the tower internal pressure rises, be difficult to remain in operation, the propenal polymerization taking place in the tower, have a large amount of sticking shape white polymer to produce, this shows that only N-hydrocarbon oxy compound polymerization inhibition effect in the process of rectifying propenal is low.
Comparative Examples 18
Experiment condition is with embodiment 15, stopper adopts single HQ 300ppm, turn round after three days, the tower internal pressure rises, be difficult to remain in operation, the propenal polymerization taking place in the tower, have a large amount of sticking shape white polymer to produce, this shows that only phenolic inhibitor polymerization inhibition effect in the process of rectifying propenal is low.
Embodiment 16
Experimental installation is with embodiment 15, and material is a Methylacrylaldehyde in the tower, adopts the HQ+ZJ-701 compound polymerization inhibitor, HQ was that 100ppm, ZJ-701 are 100ppm, and tower still temperature keeps 110-120 ℃, this condition continuous operation 7 days, no polymkeric substance produces in the parking checking, tower.
Comparative Examples 19
Experiment condition is with embodiment 16, adopt single stopper HQ, usage quantity is 200ppm, turn round after three days, the tower internal pressure rises, and is difficult to remain in operation, and polymerization takes place in the tower, there are a large amount of thick whites or faint yellow polymkeric substance to produce, this shows that only phenolic inhibitor polymerization inhibition effect in the rectifying of Methylacrylaldehyde is low.
Comparative Examples 20
Experiment condition is with embodiment 16, stopper adopts single ZJ-701, usage quantity 200ppm, turn round after three days, the tower internal pressure rises, and is difficult to remain in operation, and polymerization takes place in the tower, there are a large amount of thick whites or faint yellow polymkeric substance to produce, this shows that only N-hydrocarbon oxy compound polymerization inhibition effect in the rectifying of Methylacrylaldehyde is low.
The invention effect
The compound polymerization inhibitor that is grouped into by two or more one-tenth in specific N-hydrocarbon oxy compound, quinhydrones and the phenothiazine compounds, polymerization inhibition effect is significantly increased when using separately than these polymerization inhibitors, even long-term continuous operation on rectification production device, or when the methacrylaldehyde Product transport, can both bring into play good polymerization inhibition effect.
Claims (7)
1, the anti-polymerization method of a kind of (methyl) propenal and derivative thereof, it is characterized in that this method is stopper to be joined in the material that contains (methyl) propenal and derivative thereof, these materials are included in (methyl) propenal and the derivative material thereof that carries out in various physical treatments, chemical treatment, accumulating or the use, stopper is chain transfer type stopper and the N--oxyl piperidine compounds compound by 100: 1～1: 100 weight ratio, is preferably 10: 1～compound of 1: 10 weight ratio.
2, method according to claim 1 is characterized in that chain transfer type stopper is to choose any one kind of them in quinhydrones, hydroquinone monomethyl ether or the phenothiazines compound or several.
3, according to the described method of claim 1, it is characterized in that N--oxyl piperidine compounds is N--oxyl-4-hydroxyl-2,2,6,6-tetramethyl piperidine or tricresyl phosphite (N--oxyl-2,2,6,6-tetramethyl piperidine) ester, its structural formula is:
4, method according to claim 1 is characterized in that (methyl) propenal and derivative thereof comprise propenal, Methylacrylaldehyde, 2-alkoxyl group-3,4-dihydropyrane, glutaraldehyde, quinoline, pyridine, ligustral or blue bell aldehyde.
5, method according to claim 1, it is characterized in that physical treatment, chemical treatment, accumulating or the use of (methyl) propenal and derivative thereof, be meant absorption, rectifying, extraction, washing, centrifugal settling, filtration, chemical reaction, storage or transportation in production (methyl) propenal and derivative thereof or use (methyl) propenal and derivative or the storage and transport process.
6, according to the described method of claim 1～5, it is characterized in that this compound polymerization inhibitor can directly use, also can in the presence of special state such as oxygen or airflow, use.
7, according to the method described in the claim 1～5, the total concn that it is characterized in that compound polymerization inhibitor in (methyl) propenal and derivative material thereof is 10～10000ppm, preferred 40～4000ppm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016821A (en) * | 2014-06-10 | 2014-09-03 | 中国科学院过程工程研究所 | Polymerization inhibitor and polymerization inhibiting method for (methyl) acrolein, (methyl) acrylic acid and esters thereof |
| CN115057764A (en) * | 2022-06-30 | 2022-09-16 | 辽宁厚安科技有限公司 | Polymerization inhibitor for sulfur-free odorizing agent |
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| US5322960A (en) * | 1993-04-15 | 1994-06-21 | Nippon Shokubai Co., Ltd. | Method for inhibiting polymerization of (meth) acrylic acid and esters thereof |
| DE19946136A1 (en) * | 1999-09-27 | 2001-03-29 | Basf Ag | Inhibitor composition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016821A (en) * | 2014-06-10 | 2014-09-03 | 中国科学院过程工程研究所 | Polymerization inhibitor and polymerization inhibiting method for (methyl) acrolein, (methyl) acrylic acid and esters thereof |
| CN115057764A (en) * | 2022-06-30 | 2022-09-16 | 辽宁厚安科技有限公司 | Polymerization inhibitor for sulfur-free odorizing agent |
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Effective date of registration: 20170215 Address after: 201424 Fengxian District Cang Road, lane, Lane 357, room 100, room 295 Patentee after: Shanghai Hua Yi new material Co., Ltd Address before: 200137 Pudong North Road, Shanghai, No. 2031, No. Patentee before: Shanghai Huayi Acrylic Acid Co., Ltd. |