CN1269253A - Methanol and ethyl acetate separating method - Google Patents
Methanol and ethyl acetate separating method Download PDFInfo
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- CN1269253A CN1269253A CN 99112824 CN99112824A CN1269253A CN 1269253 A CN1269253 A CN 1269253A CN 99112824 CN99112824 CN 99112824 CN 99112824 A CN99112824 A CN 99112824A CN 1269253 A CN1269253 A CN 1269253A
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- ethyl acetate
- methyl alcohol
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Abstract
A separation method of methyl alcohol and ethyl acetate is characterized by that the mixture formed from methyl alcohol and ethyl acetate (or containing water) is fed into an extractive distillation tower, water as extracting agent is fed into the extractive distillation tower from its top, the water is used to extract methyl alcohol, the methyl alcohol is taken out from the tower bottom, and the mixture of ethyl acetate and water can be obtained from the tower top, then the distillate of tower top and the tower bottom liquid are respectively refined so as to obtain the ethyl acetate and methyl alcohol.
Description
The invention relates to separation, be mainly used under the content condition with higher of methyl alcohol and isolate ethyl acetate and methyl alcohol, and then carry out the purified method at some industrial generation methyl alcohol, ethyl acetate (or also containing water) mixture.
POL.PL134,275 by distilling out the azeotrope of methyl alcohol and ethyl acetate earlier, water extraction then, the product of further refining again methyl alcohol and ethyl acetate.JP6,336,455 provide the method for a kind of extractive distillation separating alcohol and ethyl acetate mixture.
The object of the present invention is to provide the separation method of a kind of methyl alcohol and ethyl acetate, its separation efficiency height, good separating effect.
The invention provides the separation method of a kind of methyl alcohol and ethyl acetate, it is characterized in that: the mixture that methyl alcohol, ethyl acetate (perhaps also containing water) are formed is input in the extraction distillation column, supply with water as extraction agent in the extractive distillation column overhead, utilize water to extract methyl alcohol, methyl alcohol is taken out at the bottom of tower, and obtain the mixture of ethyl acetate and water from cat head, refining respectively liquid at the bottom of extraction distillation column overhead distillate and the tower again, pure ethyl acetate and methyl alcohol.Can further be input to the liquid liquid separator from the phlegma of extraction distillation column top of tower among the present invention and separate, obtain containing the water of ethyl acetate from the bottom, return to mix and do charging with raw material; Top gets the organic phase that mainly contains ethyl acetate, and part refluxes, and the charging of dehydration tower is done in part output, dewater make with extra care ethyl acetate product.Effluent liquid from the extraction distillation column tower bottom among the present invention can further be input to rectifying the rectifying tower, gets methanol product from cat head.
The present invention closes Yu Yita with extraction and distillation, save extraction tower, obtain the mixture of ethyl acetate and water in cat head, get the mixture of first alcohol and water at the bottom of the tower, refining respectively liquid at the bottom of extraction distillation column overhead distillate and the tower again, get pure ethyl acetate and methyl alcohol, separated methyl alcohol and ethyl acetate preferably.
Below by embodiment in detail the present invention is described in detail.
Accompanying drawing 1 is a process flow diagram.
Fig. 1 is seen in technical process, and the raw material 1 of 100 parts of weight is entered extraction distillation column A bottom, the cat head of 113.3 parts of heavy extraction water 2 from tower A is entered again.Steam liquid 3 through being divided into water 4 and organic phase 5 after the condensation in decanting vessel 13, water 4 returns to mix with raw material 1 does charging, and organic phase 5 parts reflux, and partly are passed to dehydration tower B and dewater.Tower B bottom goes out ethyl acetate product 6, and tower B overhead distillate 7 is through being divided into water 9 and organic phase 8 in decanting vessel 14 after the condensation.Organic phase 8 refluxes, and water 9 returns to mix with raw material 1 and enters tower A do charging, and extraction distillation column A bottom liquid 10 enters among the rectifying tower C, and tower C top goes out methanol product 11, and water outlet 12 at the bottom of the tower.Each component is formed and weight sees Table 1.The parameter of three towers is: tower A is high 1.40 meters, 25 millimeters of internal diameters.Tower B is high 0.52 meter, 13 millimeters of internal diameters.Tower C is high 1.40 meters, 25 millimeters of internal diameters.
Identical with the order of example 1, just each component is formed and heavy difference.See Table 2.
Table 1
Table 2
| Component | ??1 | ??2 | ??6 | ??11 | ??12 |
| Water (W%) | 100.00 | ?0.16 | ?0.96 | ?99.96 | |
| Ethyl acetate (W%) | 30.10 | ?99.80 | |||
| Methyl alcohol (W%) | 69.90 | ?0.04 | ?99.04 | ?0.04 | |
| Part weight | 100.0 | 113.3 | ?30.1 | ?70.4 | ?112.8 |
| Component | ??1 | ???2 | ??6 | ??11 | ??12 |
| Water (W%) | 30.00 | ?100.00 | ?0.18 | ?0.45 | ?99.90 |
| Ethyl acetate (W%) | 7.00 | ?99.74 | |||
| Methyl alcohol (W%) | 63.00 | ?0.08 | ?99.55 | ?0.10 | |
| Part weight | 100.0 | ?40.0 | ?7.0 | ?63.2 | ?69.8 |
Claims (3)
1. the separation method of methyl alcohol and ethyl acetate, it is characterized in that: the mixture that methyl alcohol, ethyl acetate (perhaps also containing water) are formed is input in the extraction distillation column, supply with water as extraction agent in the extractive distillation column overhead, utilize water to extract methyl alcohol, methyl alcohol is taken out at the bottom of tower, and obtain the mixture of ethyl acetate and water from cat head, refining respectively liquid at the bottom of extraction distillation column overhead distillate and the tower again, pure ethyl acetate and methyl alcohol.
2. according to the separation method of described methyl alcohol of claim 1 and ethyl acetate, it is characterized in that: the phlegma from the extraction distillation column top of tower is input to the liquid liquid separator separates, obtain containing the water of ethyl acetate from the bottom, return to mix and do charging with raw material; Top gets the organic phase that mainly contains ethyl acetate, and part refluxes, and the charging of dehydration tower is done in part output, dewater make with extra care ethyl acetate product.
3. according to the separation method of described methyl alcohol of claim 1 and ethyl acetate, it is characterized in that: the effluent liquid from the extraction distillation column tower bottom is input to rectifying the rectifying tower, gets methanol product from cat head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112824 CN1123370C (en) | 1999-04-07 | 1999-04-07 | Methanol and ethyl acetate separating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112824 CN1123370C (en) | 1999-04-07 | 1999-04-07 | Methanol and ethyl acetate separating method |
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| Publication Number | Publication Date |
|---|---|
| CN1269253A true CN1269253A (en) | 2000-10-11 |
| CN1123370C CN1123370C (en) | 2003-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99112824 Expired - Fee Related CN1123370C (en) | 1999-04-07 | 1999-04-07 | Methanol and ethyl acetate separating method |
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| CN (1) | CN1123370C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801488B (en) * | 2007-07-13 | 2012-10-10 | Amt国际股份有限公司 | Low-energy extractive distillation process for dehydration of aqueous ethanol |
| CN105272819A (en) * | 2014-07-03 | 2016-01-27 | 中国石油化工股份有限公司 | Purification method of methanol containing ethyl acetate impurity |
| CN106563285A (en) * | 2016-10-10 | 2017-04-19 | 天津科技大学 | Rectification apparatus for high-salinity material |
| CN109678669A (en) * | 2019-02-26 | 2019-04-26 | 广西科伦制药有限公司 | A kind of device that Cefotaxime Sodium is produced to ethyl acetate and separating methanol in mother liquor |
| CN114797146A (en) * | 2022-05-12 | 2022-07-29 | 重庆科技学院 | Double-partition extraction rectifying tower |
| CN114939283A (en) * | 2022-05-12 | 2022-08-26 | 重庆科技学院 | Method for separating and purifying ethyl acetate-methanol-water ternary azeotropic mixture |
| CN116082159A (en) * | 2022-12-22 | 2023-05-09 | 重庆科技学院 | Method for separating ethyl acetate-methanol-water by coupling heterogeneous phase and three-tower rectification |
| CN116082159B (en) * | 2022-12-22 | 2024-06-04 | 重庆科技学院 | Method for separating ethyl acetate-methanol-water by coupling heterogeneous phase and three-tower rectification |
-
1999
- 1999-04-07 CN CN 99112824 patent/CN1123370C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801488B (en) * | 2007-07-13 | 2012-10-10 | Amt国际股份有限公司 | Low-energy extractive distillation process for dehydration of aqueous ethanol |
| CN105272819A (en) * | 2014-07-03 | 2016-01-27 | 中国石油化工股份有限公司 | Purification method of methanol containing ethyl acetate impurity |
| CN105272819B (en) * | 2014-07-03 | 2018-06-08 | 中国石油化工股份有限公司 | The methanol purification process of the impurity containing ethyl acetate |
| CN106563285A (en) * | 2016-10-10 | 2017-04-19 | 天津科技大学 | Rectification apparatus for high-salinity material |
| CN109678669A (en) * | 2019-02-26 | 2019-04-26 | 广西科伦制药有限公司 | A kind of device that Cefotaxime Sodium is produced to ethyl acetate and separating methanol in mother liquor |
| CN109678669B (en) * | 2019-02-26 | 2024-01-09 | 广西科伦制药有限公司 | Device for separating ethyl acetate from methanol in cefotaxime sodium production mother liquor |
| CN114797146A (en) * | 2022-05-12 | 2022-07-29 | 重庆科技学院 | Double-partition extraction rectifying tower |
| CN114939283A (en) * | 2022-05-12 | 2022-08-26 | 重庆科技学院 | Method for separating and purifying ethyl acetate-methanol-water ternary azeotropic mixture |
| CN114797146B (en) * | 2022-05-12 | 2023-07-25 | 重庆科技学院 | Double-baffle extraction rectifying tower for separating ethyl acetate-methanol-water ternary azeotrope |
| CN114939283B (en) * | 2022-05-12 | 2023-11-28 | 重庆科技学院 | Method for separating and purifying ethyl acetate-methanol-water ternary azeotropic mixture |
| CN116082159A (en) * | 2022-12-22 | 2023-05-09 | 重庆科技学院 | Method for separating ethyl acetate-methanol-water by coupling heterogeneous phase and three-tower rectification |
| CN116082159B (en) * | 2022-12-22 | 2024-06-04 | 重庆科技学院 | Method for separating ethyl acetate-methanol-water by coupling heterogeneous phase and three-tower rectification |
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| Publication number | Publication date |
|---|---|
| CN1123370C (en) | 2003-10-08 |
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