CN103896718A - Recycling method of trichloroethane - Google Patents
Recycling method of trichloroethane Download PDFInfo
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- CN103896718A CN103896718A CN201410159242.5A CN201410159242A CN103896718A CN 103896718 A CN103896718 A CN 103896718A CN 201410159242 A CN201410159242 A CN 201410159242A CN 103896718 A CN103896718 A CN 103896718A
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- trichloroethane
- extraction tower
- recovery method
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Abstract
The invention discloses a recycling method of trichloroethane, which comprises the following steps: introducing trichloroethane stored in a trichloroethane storage tank into a vibration extracting tower, adding water, extracting trichloroethane from the lower part of the vibration extracting tower after the operation of the vibration extracting tower, and placing in a freezing tank to obtain the qualified trichloroethane. The method disclosed by the invention has the beneficial effect that the recycling effect is good, the purity of the recycled product is high, the product quality can achieve the requirement, the energy is saved, the high-temperature rectification is unnecessary in comparison with the traditional method, the environment is protected, and a drying agent for drying is not required.
Description
Technical field
The present invention relates to recovery method, relate in particular to a kind of recovery method of trichloroethane.
Background technology
Trichloroethane, is a kind of non-explosive, nonflammable colourless liquid odorous, poisonous! This product is as the raw material of vinylidene chloride, the intermediate of resin, and the extraction agent of the solvent of fumigant in agricultural, sterilant, grease, wax, rubber, cellulose acetate, dyestuff, spices etc., high dosage has anesthetic action, when serious, can cause death.Trichloroethane has in use easily been sneaked into DMF, reduces the stability of trichloroethane, cannot reach service requirements.
Therefore, be badly in need of a kind of improved technology and solve existing this problem in prior art.
Summary of the invention
The invention provides a kind of recovery method of trichloroethane.
The technical solution used in the present invention is:
The recovery method of trichloroethane, comprises the following steps: the trichloroethane being stored in trichloroethane storage tank is passed in vibration extraction tower, add water, through the running of vibration extraction tower, vibrate the trichloroethane that is of extraction tower bottom extraction, put into refrigerated cylinder, obtain qualified trichloroethane.
The trichloroethane adding in described vibration extraction tower and the mass ratio of water are (2-4): 1.
The top overflow extraction of described vibration extraction tower be the DMF aqueous solution.
The temperature of described frozen cooling to 0 ± 3 ℃.
The invention has the beneficial effects as follows: recovering effect is good, reclaim product purity high, quality product can reach requirement, and save energy does not more need to use high temperature rectifying with previous methods, and protection of the environment, does not need to use desiccant dryness.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is structural representation of the present invention.
Wherein: 1, trichloroethane storage tank, 2, vibration extraction tower, 3, refrigerated cylinder, 4, water-soluble flow container, 5, raffinate transferpump.
Embodiment
Embodiment 1
As shown in Figure 1, the recovery method of trichloroethane of the present invention, comprise the following steps: the trichloroethane being stored in trichloroethane storage tank 1 is passed in vibration extraction tower 2, add water, the trichloroethane adding in vibration extraction tower 2 and the mass ratio of water are 2:1, through the running of vibration extraction tower 2, what vibrate extraction tower 2 top overflow extraction is the DMF aqueous solution, the DMF aqueous solution passes in water-soluble flow container 4, vibrate the trichloroethane that is of extraction tower 2 bottom extraction, put into refrigerated cylinder 3, described frozen cooling is the temperature of-3 ℃ extremely, obtain qualified trichloroethane, refrigerated cylinder 3 is provided with raffinate transferpump 5.
As shown in Figure 1, the recovery method of trichloroethane of the present invention, comprise the following steps: the trichloroethane being stored in trichloroethane storage tank 1 is passed in vibration extraction tower 2, add water, the trichloroethane adding in vibration extraction tower 2 and the mass ratio of water are 3:1, through the running of vibration extraction tower 2, what vibrate extraction tower 2 top overflow extraction is the DMF aqueous solution, the DMF aqueous solution passes in water-soluble flow container 4, vibrate the trichloroethane that is of extraction tower 2 bottom extraction, put into refrigerated cylinder 3, the temperature of described frozen cooling to 0 ℃, obtain qualified trichloroethane, refrigerated cylinder 3 is provided with raffinate transferpump 5.
As shown in Figure 1, the recovery method of trichloroethane of the present invention, comprise the following steps: the trichloroethane being stored in trichloroethane storage tank 1 is passed in vibration extraction tower 2, add water, the trichloroethane adding in vibration extraction tower 2 and the mass ratio of water are 4:1, through the running of vibration extraction tower 2, what vibrate extraction tower 2 top overflow extraction is the DMF aqueous solution, the DMF aqueous solution passes in water-soluble flow container 4, vibrate the trichloroethane that is of extraction tower 2 bottom extraction, put into refrigerated cylinder 3, the temperature of described frozen cooling to 3 ℃, obtain qualified trichloroethane, refrigerated cylinder 3 is provided with raffinate transferpump 5.
Recovering effect is good, reclaims product purity high, and quality product can reach requirement, and save energy does not more need to use high temperature rectifying with previous methods, and protection of the environment, does not need to use desiccant dryness.
Claims (4)
1. the recovery method of trichloroethane, it is characterized in that: comprise the following steps: the trichloroethane being stored in trichloroethane storage tank is passed in vibration extraction tower, add water, through the running of vibration extraction tower, vibrate the trichloroethane that is of extraction tower bottom extraction, put into refrigerated cylinder, obtain qualified trichloroethane.
2. the recovery method of trichloroethane according to claim 1, is characterized in that: the trichloroethane adding in described vibration extraction tower and the mass ratio of water are (2-4): 1.
3. the recovery method of trichloroethane according to claim 1, is characterized in that: the top overflow extraction of described vibration extraction tower for the DMF aqueous solution.
4. the recovery method of trichloroethane according to claim 1, is characterized in that: the temperature of described frozen cooling to 0 ± 3 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159242.5A CN103896718A (en) | 2014-04-21 | 2014-04-21 | Recycling method of trichloroethane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410159242.5A CN103896718A (en) | 2014-04-21 | 2014-04-21 | Recycling method of trichloroethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103896718A true CN103896718A (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410159242.5A Pending CN103896718A (en) | 2014-04-21 | 2014-04-21 | Recycling method of trichloroethane |
Country Status (1)
| Country | Link |
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| CN (1) | CN103896718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108299225A (en) * | 2018-01-13 | 2018-07-20 | 安徽金禾实业股份有限公司 | A kind of method and device recycling trichloroethanes and DMF |
-
2014
- 2014-04-21 CN CN201410159242.5A patent/CN103896718A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108299225A (en) * | 2018-01-13 | 2018-07-20 | 安徽金禾实业股份有限公司 | A kind of method and device recycling trichloroethanes and DMF |
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Application publication date: 20140702 |