CN102658004A - Water removal device of vinyl chloride gas monomer - Google Patents
Water removal device of vinyl chloride gas monomer Download PDFInfo
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- CN102658004A CN102658004A CN2012101434066A CN201210143406A CN102658004A CN 102658004 A CN102658004 A CN 102658004A CN 2012101434066 A CN2012101434066 A CN 2012101434066A CN 201210143406 A CN201210143406 A CN 201210143406A CN 102658004 A CN102658004 A CN 102658004A
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- stainless steel
- water removal
- vinyl chloride
- pressure
- water pipe
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Abstract
The invention provides a water removal device of vinyl chloride gas monomer. The water removal device comprises a first pressure-resistant stainless steel water removal pipe, a second pressure-resistant stainless steel water removal pipe and a stainless steel high pressure gas path system for connecting the two stainless steel water removal pipes, wherein the first pressure-resistant stainless steel water removal pipe is connected in series with the second pressure-resistant stainless steel water removal pipe; both the first pressure-resistant stainless steel water removal pipe and the second pressure-resistant stainless steel water removal pipe are filled with molecular sieve; and the water removal device is a fully enclosed system. The water removal device has the following technical effects that: (1) the device has a simple treatment process, is low in energy consumption, nontoxic, environmentally-friendly and low in cost, has no waste and extremely high practical value and can be used for water removal of purified vinyl chloride monomer, the problem of high requirement of special industries on water in the vinyl chloride monomer can be effectively solved, and the water content in the vinyl chloride gas monomer can be controlled to be (2-10)*10<-6>; and (2) due to adoption of the stainless steel water removal pipe, the water removal device is fully enclosed to prevent harmful substances from leakage, and the bearing range of the pressure is large.
Description
Technical field
The present invention provides a kind of device of in vinyl chloride gaseous monomer purification process, removing moisture, relates to toxic and harmful purification technique field.
Technical background
Vinyl chloride (CH
2=CHCl), molecular weight 62.50 at room temperature is colourless poisonous gas, and the smell of ether appearance is arranged.Density of liquid 0.912lg/cm
3Boiling point-13.9 ℃.Freezing point-160 ℃.472 ℃ of self-ignition points.142 ℃ of critical-temperatures.Critical pressure 55.2Pa.Be slightly soluble in water, be dissolved in methyl alcohol, ethanol, ether, acetone and dichloroethanes.
At present, the production method of vinyl chloride mainly contains following three kinds: 1) acetylene method; 2) process for oxychlorination of ethylene; 3) mix the eneyne method.China began to adopt acetylene method to produce vinyl chloride in 1958, be still one of main production method of producing vinyl chloride so far.
The principle that acetylene method (being commonly called as " carbide ") is produced VCM is following: in the presence of mercuric chleride catalyst, and acetylene and the direct synthesizing chloroethylene of hydrogen chloride addition.
At present the main source of the employed VCM of China is that acetylene method produces.In the production process of acetylene method VCM, moisture inevitably is brought in the system.The entering of moisture can cause vinyl chloride peroxide hydrolytic reactions, generates acidic materials such as hydrogen chloride (meet water and become hydrochloric acid), formic acid, formaldehyde, the corrosion steel systeming equipment; And the iron ion that generates can impel oxygen and the VCM reaction in the system to generate peroxide again, not only repeats hydrolysis, and causes polymerization of vinyl choride monomer.
At present the technology of dewatering of vinyl chloride gaseous monomer mainly contains two kinds of the dry and transformation adsorption dewaterings of solid caustic soda.
1) the solid caustic soda dry technology mainly is a water imbibition of utilizing solid caustic soda, absorb the moisture in the vinyl chloride gas, but effect is more general, and the moisture in the vinyl chloride after dewatering is generally about 1%, and the consumption of solid caustic soda is bigger.
2) alternating temperature adsorption dewatering technology mainly is to utilize the alternating temperature adsorption technology to separate the moisture in the vinyl chloride gas, and this method can make the VCM moisture reduce to 3.0 * 10
-4Below.
PVC (polyvinyl chloride) as one of primary raw material of the used plastic products of productive life generates through VCM (gas) autohemagglutination.Yet in some special industries; Higher to the VCM purity requirement, also tackle wherein moisture mutually and have higher requirement the for example development of national standard material; Need to use purity to be higher than 99.9% VCM, wherein moisture must be limited in 1.0 * 10
-5Below.
Therefore, can't satisfy the industry requirement higher by above-mentioned two kinds of resulting VCMs of the technical finesse that dewaters to purity requirement.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art, a kind of de-watering apparatus of vinyl chloride gaseous monomer is provided.
The de-watering apparatus of vinyl chloride gaseous monomer of the present invention; Comprise that the first withstand voltage stainless steel removes water pipe, the second withstand voltage stainless steel removes water pipe and is used to be connected the stainless steel high-pressure gas circuit system that two withstand voltage stainless steels remove water pipe; The said first withstand voltage stainless steel removes water pipe and the second withstand voltage stainless steel is connected in series except that water pipe; The said first withstand voltage stainless steel removes water pipe and the second withstand voltage stainless steel all is filled with molecular sieve except that in the water pipe, and said de-watering apparatus is totally-enclosed system.
The top that the said first withstand voltage stainless steel removes water pipe is filled with molecular sieve, and under-filled have lime.
Operation principle of the present invention is in the air-channel system of stainless steel high pressure, adopts withstand voltage stainless steel adsorbent equipment to fill molecular sieve, utilizes the selective absorption effect of molecular sieve, after the vinyl chloride gaseous monomer flows to this device.In the gas flow path of VCM, utilize the pressure reduction of pipeline to make the vinyl chloride gaseous monomer through the stainless steel adsorbent equipment, through the suction-operated of device, remove moisture, make that moisture is reduced to (1.5-2.5) * 10 in the vinyl chloride gaseous monomer
-6Consider the toxicity of vinyl chloride, whole system is totally-enclosed system, avoids the possibility that vinyl chloride leaks accidentally in removal process.
The present invention has following technique effect:
1) this apparatus processes technology is simple, low energy consumption, nontoxic, do not have useless, environmental friendliness, with low cost, have stronger practical value, can be used for dewatering of purifying VCM, can effectively solve special industry to moisture requirement problem of higher in the VCM; Through the water treatment that removes of apparatus of the present invention, moisture can be controlled at (2-10) * 10 in the vinyl chloride gaseous monomer
-6, satisfy the actual needs that use;
2) owing to adopt stainless steel to remove water pipe, complete closed prevents leaking of harmful substance, and big to the tolerance range of pressure.
Description of drawings
Fig. 1 is the structural representation of de-watering apparatus of the vinyl chloride gaseous monomer of invention.
Wherein, 1 is that the first withstand voltage stainless steel removes water pipe, and 2 is that the second withstand voltage stainless steel removes water pipe, and 3 is stainless steel high-pressure gas circuit system.
The specific embodiment
Embodiment 1
As shown in Figure 1; The de-watering apparatus of vinyl chloride gaseous monomer of the present invention; Comprise that the first withstand voltage stainless steel removes water pipe 1, the second withstand voltage stainless steel and removes water pipe 2 and be used to be connected the stainless steel high-pressure gas circuit system 3 that two withstand voltage stainless steels remove water pipe 1,2; The said first withstand voltage stainless steel removes water pipe 1 and the second withstand voltage stainless steel is connected in series except that water pipe 2; The said first withstand voltage stainless steel removes water pipe 1 and the second withstand voltage stainless steel all is filled with molecular sieve except that in the water pipe 2, and said de-watering apparatus is totally-enclosed system.The top that the said first withstand voltage stainless steel removes water pipe 1 is filled with molecular sieve, and under-filled have lime.
Embodiment 2
Vinyl chloride gaseous sample 1, measuring its moisture through coulometry is 0.025%, through the vinyl chloride gas that obtains after embodiment 1 apparatus processes, measures through coulometry, its moisture is 2.5 * 10
-6
Embodiment 3
Vinyl chloride gaseous sample 2, measuring its moisture through coulometry is 0.040%, through the vinyl chloride gas that obtains after embodiment 1 apparatus processes, measures through coulometry, its moisture is 2.2 * 10
-6
Embodiment 4
Vinyl chloride gaseous sample 3, measuring its moisture through coulometry is 0.012%, through the vinyl chloride gas that obtains after embodiment 1 apparatus processes, measures through coulometry, its moisture is 1.9 * 10
-6
Embodiment 5
Vinyl chloride gaseous sample 4, measuring its moisture through coulometry is 0.025%, through the vinyl chloride gas that obtains after embodiment 1 apparatus processes, measures through coulometry, its moisture is 2.5 * 10
-6
Claims (2)
1. the de-watering apparatus of a vinyl chloride gaseous monomer; It is characterized in that; Comprise that the first withstand voltage stainless steel removes water pipe, the second withstand voltage stainless steel removes water pipe and is used to be connected the stainless steel high-pressure gas circuit system that two withstand voltage stainless steels remove water pipe; The said first withstand voltage stainless steel removes water pipe and the second withstand voltage stainless steel is connected in series except that water pipe, and the said first withstand voltage stainless steel removes water pipe and the second withstand voltage stainless steel all is filled with molecular sieve except that in the water pipe, and said de-watering apparatus is totally-enclosed system.
2. the de-watering apparatus of vinyl chloride gaseous monomer according to claim 1 is characterized in that, the top that the said first withstand voltage stainless steel removes water pipe is filled with molecular sieve, and under-filled have lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101434066A CN102658004A (en) | 2012-05-10 | 2012-05-10 | Water removal device of vinyl chloride gas monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101434066A CN102658004A (en) | 2012-05-10 | 2012-05-10 | Water removal device of vinyl chloride gas monomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102658004A true CN102658004A (en) | 2012-09-12 |
Family
ID=46767661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101434066A Pending CN102658004A (en) | 2012-05-10 | 2012-05-10 | Water removal device of vinyl chloride gas monomer |
Country Status (1)
| Country | Link |
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| CN (1) | CN102658004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116236875A (en) * | 2023-05-12 | 2023-06-09 | 天津渤化工程有限公司 | Process and system for recycling vinyl chloride in PVC paste resin preparation process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000064847A1 (en) * | 1999-04-23 | 2000-11-02 | The Dow Chemical Company | Water removal in purification of vinyl chloride |
| CN201201904Y (en) * | 2008-04-01 | 2009-03-04 | 南京特种气体厂有限公司 | Purifier for purifying microimpurity in silane |
-
2012
- 2012-05-10 CN CN2012101434066A patent/CN102658004A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000064847A1 (en) * | 1999-04-23 | 2000-11-02 | The Dow Chemical Company | Water removal in purification of vinyl chloride |
| CN201201904Y (en) * | 2008-04-01 | 2009-03-04 | 南京特种气体厂有限公司 | Purifier for purifying microimpurity in silane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116236875A (en) * | 2023-05-12 | 2023-06-09 | 天津渤化工程有限公司 | Process and system for recycling vinyl chloride in PVC paste resin preparation process |
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Application publication date: 20120912 |