CN110218144A - A kind of acetylene gas purification process - Google Patents
A kind of acetylene gas purification process Download PDFInfo
- Publication number
- CN110218144A CN110218144A CN201910609539.XA CN201910609539A CN110218144A CN 110218144 A CN110218144 A CN 110218144A CN 201910609539 A CN201910609539 A CN 201910609539A CN 110218144 A CN110218144 A CN 110218144A
- Authority
- CN
- China
- Prior art keywords
- acetylene gas
- acetylene
- purification process
- gas purification
- acetic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/11—Purification; Separation; Use of additives by absorption, i.e. purification or separation of gaseous hydrocarbons with the aid of liquids
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of gas purifying technique, especially a kind of acetylene gas purification process；During preparing vinyl acetate using acetylene method ester, often containing foreign gases such as water, acetaldehyde in raw material acetylene and/or circulation acetylene gas.The present invention is using preparing raw material, the by-product of vinylacetate, such as acetic acid, acetic anhydride make absorbent, and absorption makes water, acetaldehyde in acetylene gas etc. be dissolved in acetic acid, in acetic anhydride, achievees the purpose that pure acetylene gas.
Description
Technical field
The present invention relates to a kind of gas purifying technique, especially a kind of acetylene gas purification process.
Background technique
When using producing vinyl acetate by acetylene method ester, in the acetylene from gas holder raw material acetylene and recycled, Chang Hanyou
The impurity such as water, acetaldehyde.And the presence of water, make to generate unfavorable side reaction in synthesis process, vinyl acetate ester hydrolysis can such as produced
Raw acetaldehyde, can further generate crotonaldehyde etc..Acetaldehyde, crotonaldehyde etc. not only generate the quality of product vinylacetate serious
The boiling point of adverse effect, they and product vinylacetate is not much different again, and separation and purification is very difficult, and energy consumption is substantially increased；
Acetaldehyde, crotonaldehyde simultaneously, easily polymerization, which generate high polymer, makes catalyst inactivation, therefore all stringent in circulation acetic acid, circulation acetylene
The content for controlling crotonaldehyde, acetaldehyde is substantially increased purification energy consumption, material consumption.
Ma Yangui etc. is introduced in " polyvinyl alcohol production technology ", the acetylene refined, using 5~7 DEG C of water at low temperature
The characteristics of low steam partial pressure, carries out cooling, drying to acetylene gas, but this can only achieve water content in reduction acetylene gas
Purpose.To circulation acetylene gas then use acetic acid absorb washing after, then with low temperature wash method come realize reduce moisture, reduce
The purpose of acetaldehyde.Acetylene after reducing moisture boosts through compressor again, and reactor reaction is entered after mixing with acetic acid steam and is generated
Vinylacetate.
These methods drop low-moisture ability and are limited by steam partial pressure, and removing degree is not high, and de- acetaldehyde is then even more
The problems such as complex process.Therefore, a kind of process for refining of acetylene is invented in design, effectively avoids the above problem, improves product index,
Energy consumption is reduced, is the key that promote vinyl acetate production technique.
Summary of the invention
A kind of acetylene gas purification process is provided the purpose of the present invention is to solve above-mentioned the deficiencies in the prior art, is answered
The substances such as moisture, acetaldehyde in acetylene gas can fast and effeciently be removed with the process.
To achieve the goals above, a kind of acetylene gas purification process designed by the present invention, technique content: raw material second
Alkynes and/or circulation acetylene are removed impurity using absorbent in pressure process；The absorbent is acetic acid, one in acetic anhydride
Kind is a variety of；The impurity is one of water, acetaldehyde, vinylacetate or a variety of.
A kind of acetylene gas purification process of the present invention, i.e. acetylene gas utilize the objects such as acetic acid, acetic anhydride in pressure process
The strong absorptive of matter absorbs the impurity such as moisture, the acetaldehyde in acetylene gas, to reach purification acetylene gas, and evaporates offer
Part acetic acid realizes the dual purpose of removal of impurities with evaporation acetic acid.
Preferably, the air blower or compressor using liquid as working solution pressurize to raw material acetylene and/or circulation acetylene.
Preferably, the absorbent is the raw material for preparing vinylacetate, by-product.
Prior art is compared, a kind of acetylene gas purification process that the present invention obtains has and simplifies process for refining process,
The side reaction in vinylacetate production is reduced, to simplify the subtractive process of vinylacetate, the advantages that energy saving.
Specific embodiment
Here is that the invention will be further described in conjunction with specific embodiments, following embodiment be it is descriptive, be not
Limited, this does not limit the scope of protection of the present invention.
Embodiment 1:
In this example, 25 DEG C of steam-laden circulation acetylene gas, into the absorption tower of 3 pieces of theoretical plates, with acetic acid, vinegar
It the results are shown in Table 1 after acid anhydrides absorption.
Embodiment 2:
In this example, 25 DEG C of steam-laden circulation acetylene gas, using acetic acid or acetic anhydride as the pendular ring of working solution
During formula blower is pressurized to 180kPa from 110kPa to acetylene, working solution acetic acid, acetic anhydride etc. absorb after the results are shown in Table 2.
Claims (4)
1. a kind of acetylene gas purification process, it is characterised in that: acetylene gas is removed impurity using absorbent in pressure process
It goes；The absorbent is one of acetic acid, acetic anhydride or a variety of；The impurity is one of water, acetaldehyde, vinylacetate
Or it is a variety of.
2. a kind of acetylene gas purification process according to claim 1, it is characterised in that: using liquid as working solution
Air blower or compressor pressurize to raw material acetylene gas.
3. a kind of acetylene gas purification process according to claim 1, it is characterised in that: the absorbent is to prepare acetic acid
Raw material, the by-product of vinyl acetate.
4. a kind of acetylene gas purification process according to claim 1, it is characterised in that: the acetylene gas is raw material second
Alkynes and/or circulation acetylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609539.XA CN110218144A (en) | 2019-07-08 | 2019-07-08 | A kind of acetylene gas purification process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910609539.XA CN110218144A (en) | 2019-07-08 | 2019-07-08 | A kind of acetylene gas purification process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110218144A true CN110218144A (en) | 2019-09-10 |
Family
ID=67812226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910609539.XA Withdrawn CN110218144A (en) | 2019-07-08 | 2019-07-08 | A kind of acetylene gas purification process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110218144A (en) |
-
2019
- 2019-07-08 CN CN201910609539.XA patent/CN110218144A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190910 |
|
| WW01 | Invention patent application withdrawn after publication |