CN104961659B - A kind of method using aldehyde compound to reduce foaming agent particle diameter - Google Patents
A kind of method using aldehyde compound to reduce foaming agent particle diameter Download PDFInfo
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- CN104961659B CN104961659B CN201510262197.0A CN201510262197A CN104961659B CN 104961659 B CN104961659 B CN 104961659B CN 201510262197 A CN201510262197 A CN 201510262197A CN 104961659 B CN104961659 B CN 104961659B
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- foaming agent
- particle diameter
- biruea
- aldehyde compound
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Abstract
The invention discloses a kind of method using aldehyde compound to reduce foaming agent particle diameter, the method specifically comprises the following steps that when using oxidizing biruea, by adding the size of formaldehyde regulation foaming agent, the addition of formaldehyde is 0.1% the 0.5% of biruea quality, can effectively reduce the particle diameter of foaming agent, it is greatly saved subsequent treatment cost, and improves the dispersibility of ADC foaming agent.The invention have the benefit that the inventive method is simple, it is not necessary to change original Processes and apparatus, cost is relatively low, can improve the serviceability of foaming agent, reduces the cost of foaming agent subsequent treatment, improves added value of product.
Description
Technical field
The present invention relates to foaming agent technical field, be specifically related to a kind of method using aldehyde compound to reduce foaming agent particle diameter.
Background technology
Azodicarbonamide, is commonly called as ADC foaming agent, is currently used widest organic chemistry foaming agent, is usually used in rubber-plastics material
Foaming.ADC foaming agent has ketazine process, urea method and method technique of having loose bowels at present.The final approach of these several techniques is identical,
It it is all synthesis biruea.Biruea uses oxidant to aoxidize again, synthesizes ADC foaming agent.At present, the most frequently used oxidant has
Chlorine, hydrogen peroxide and sodium chlorate.Chlorine method is relatively low due to cost, is domestic most common method, but its shortcoming to be by-product a large amount of
Ammonium salt, add follow-up except ammonia cost.Peroxide passivation be due to generate be ADC foaming agent and water, without by-product salt, therefore
It is a kind of clean preparation method, the domestic report that there is no industrialization at present.
The method using hydrogen peroxide oxidation biruea, its shortcoming is that particle size is relatively thick, typically in 40-50 μm, and rubber-plastics material
Foaming requires in 4-20 μm, and uses the ADC foaming agent that peroxide passivation produces, it is necessary to carries out multiple tracks pulverizing, just can obtain work
The particle diameter that skill requires, this gives the follow-up cost that adds undoubtedly, and crushing effect is limited.
Chen Shihao et al. discloses a kind of method using hexamethylenamine regulation foaming agent particle diameter, but uses hexamethylenamine to have as follows
Shortcoming: 1. hexamethylenamine can produce stimulation to human body skin, can make application on human skin pruritus in operation, and life-time service can be to people
Healthy generation threatens；2. hexamethylenamine is ammonia nitrogen compounds, soluble in water, can increase the ammonia nitrogen index of waste water, thus increase
Pollute.
Summary of the invention
The present invention be directed to use oxidizing biruea to produce the ADC thicker problem of foaming agent particle diameter, and provide a kind of and use aldehyde
Compounds reduces the method for foaming agent particle diameter, owing to the big multipotency of aldehyde material is the most molten, the most in process of production with water, it is possible to
Effectively solid particle is wrapped up, moistureproof caking can be played and the effect of solid dispersibility is provided.
The purpose of the present invention uses following technical proposals to realize.This employing aldehyde compound reduces the method for foaming agent particle diameter,
The method specifically comprises the following steps that when using oxidizing biruea, by adding the particle diameter of aldehyde compound regulation foaming agent
Size, the addition of aldehyde compound is the 0.1%-0.5% of biruea quality, can effectively reduce the particle diameter of foaming agent, significantly
Save subsequent treatment cost, and improve the dispersibility of ADC foaming agent.
As preferably, described aldehyde material is the compound with-CHO group such as formaldehyde, acetaldehyde, propionic aldehyde or benzaldehyde.
The invention have the benefit that the inventive method is simple, it is not necessary to change original Processes and apparatus, cost is relatively low, permissible
Improve the serviceability of foaming agent, reduce the cost of foaming agent subsequent treatment, improve added value of product.
Detailed description of the invention
Below by detailed description of the invention, the present invention is further elaborated, and embodiment will facilitate a better understanding of the present invention, but this
Invention is not limited only to following embodiment.
This employing aldehyde compound of the present invention reduces the method for foaming agent particle diameter, and the method specifically comprises the following steps that is adopting
During with oxidizing biruea, by adding the size of aldehyde compound regulation foaming agent, the addition of aldehyde compound
0.1%-0.5% for biruea quality.Described aldehyde material is that formaldehyde, acetaldehyde, propionic aldehyde or benzaldehyde etc. are with-CHO group
Compound.
Embodiment 1
Weighing 20.0g biruea is in there-necked flask, and adds catalyst sodium bromide, promoter ferric chloride, the sulphuric acid of 30%
And formaldehyde, it is warming up to reaction temperature.Slowly dropping 20g oxidant hydrogen peroxide (30%), after completion of dropwise addition during insulation reaction one section
Between, cooling, sucking filtration, after washing 3 times, filter cake is in 110 DEG C of forced air dryings, finished product detection mean diameter.
Embodiment 2
Weigh biruea 20g, break into, with water, the biruea slurry that solid content is 30%, then be added thereto to sodium bromide 1.5g, stir
Mix and make it dissolve, be subsequently adding a certain amount of formaldehyde.Slurry is poured in the glass reactor of the jacketed that volume is 500ml,
Logical coolant in chuck, controls temperature of reaction system at 45 DEG C.It is passed through chlorine, chlorine by the liquid chlorine cylinder backward reactor bottom that gasifies
Gas is passed through speed to keep reactor tiny structure to be as the criterion.Until reaction terminates, slurries filtration, washing, survey it after drying respectively and put down
All particle diameters.
Claims (1)
1. one kind uses the method that aldehyde compound reduces foaming agent particle diameter, it is characterized in that: the method specifically comprises the following steps that when using oxidizing biruea, by adding the size of formaldehyde regulation foaming agent, the addition of formaldehyde is the 0.1%-0.5% of biruea quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510262197.0A CN104961659B (en) | 2015-05-21 | 2015-05-21 | A kind of method using aldehyde compound to reduce foaming agent particle diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510262197.0A CN104961659B (en) | 2015-05-21 | 2015-05-21 | A kind of method using aldehyde compound to reduce foaming agent particle diameter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104961659A CN104961659A (en) | 2015-10-07 |
| CN104961659B true CN104961659B (en) | 2017-01-04 |
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| CN201510262197.0A Active CN104961659B (en) | 2015-05-21 | 2015-05-21 | A kind of method using aldehyde compound to reduce foaming agent particle diameter |
Country Status (1)
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109734629B (en) * | 2019-03-07 | 2021-09-10 | 江苏索普化工股份有限公司 | Preparation method of uniformly-dispersed superfine ADC foaming agent |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102432908B (en) * | 2011-08-02 | 2015-06-24 | 杭州海虹精细化工有限公司 | Low-temperature modified foaming agent and preparation method thereof |
| CN103058891B (en) * | 2013-01-06 | 2014-07-16 | 杭州海虹精细化工有限公司 | Method for producing biruea and urotropine |
| CN103113266B (en) * | 2013-02-06 | 2014-06-04 | 陈世豪 | Method for chemically regulating particle size of azobisformamide |
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