CN212560046U - Process unit for removing phenol impurities in benzyl alcohol - Google Patents
Process unit for removing phenol impurities in benzyl alcohol Download PDFInfo
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- CN212560046U CN212560046U CN202020968765.5U CN202020968765U CN212560046U CN 212560046 U CN212560046 U CN 212560046U CN 202020968765 U CN202020968765 U CN 202020968765U CN 212560046 U CN212560046 U CN 212560046U
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Abstract
A process unit for removing phenol impurities in benzyl alcohol comprises a first dephenolizing tower and a second dephenolizing tower, wherein the upper end of the first dephenolizing tower is connected with the second dephenolizing tower in series; the lower end of the first dephenolizing tower is provided with a first circulating pipe, a first conveying pump is communicated with a first dephenolizing tower reboiler and the first circulating pipe, the first dephenolizing tower reboiler is communicated with the first dephenolizing tower, and a first alkali inlet pipe is communicated with the first dephenolizing tower; a second circulation pipe is arranged at the lower end of the second dephenolizing tower, a third conveying pump is communicated with a second dephenolizing tower reboiler and the second circulation pipe, the second dephenolizing tower reboiler is communicated with the second dephenolizing tower, and a second alkali inlet pipe is communicated with the second dephenolizing tower; the upper end of the second dephenolizing tower is connected with a first condenser. The utility model has the advantages that the problems of unsatisfactory dephenolizing effect, large alkali consumption, waste water generated by washing and large operation difficulty are solved.
Description
Technical Field
The utility model relates to a chemical separation technique, concretely relates to process units of phenol class impurity in desorption benzyl alcohol.
Background
The liquid phase air oxidation of toluene produces benzyl alcohol, and side reaction produces phenol impurity to affect the purity of benzyl alcohol. The phenols show acidity, and the removal effect is not ideal when the phenols are neutralized by using the traditional alkali. The alkali consumption is large, a large amount of waste water is generated by washing after alkali washing, and the operation difficulty is large.
Disclosure of Invention
The utility model provides a fine solution of process units of phenol type impurity in desorption benzyl alcohol dephenolization effect is unsatisfactory, the alkali consumption is big, the washing produces waste water, the problem that the operation degree of difficulty is big.
The technical scheme for realizing the aim of the invention is that the process device for removing the phenol impurities in the benzyl alcohol comprises a first dephenolizing tower and a second dephenolizing tower, wherein the upper end of the first dephenolizing tower is connected with the second dephenolizing tower in series;
the lower end of the first dephenolizing tower is provided with a first circulating pipe, a first conveying pump is communicated with a first dephenolizing tower reboiler and the first circulating pipe, the first dephenolizing tower reboiler is communicated with the first dephenolizing tower, and a first alkali inlet pipe is communicated with the first dephenolizing tower; a second circulation pipe is arranged at the lower end of the second dephenolizing tower, a third conveying pump is communicated with a second dephenolizing tower reboiler and the second circulation pipe, the second dephenolizing tower reboiler is communicated with the second dephenolizing tower, and a second alkali inlet pipe is communicated with the second dephenolizing tower; and the upper end of the second dephenolizing tower is connected with a first condenser.
Furthermore, the first condenser is connected with the second condenser in series.
Furthermore, the first condenser is connected with the upper end of the second dephenolizing tower through a first condensate tank and a fourth delivery pump.
And furthermore, the second condenser is communicated with a condensed water output pipe through a second condensed water tank and a fifth delivery pump.
Further, the second condenser is connected with a tower pressure control pipe, and a tower pressure control electric valve is arranged on the tower pressure control pipe.
Furthermore, the first delivery pump is connected with the third delivery pump through a connecting pipe, and a one-way valve is arranged on the connecting pipe.
Furthermore, the lower end of the reboiler of the first dephenolizing tower is connected with a third alkali inlet pipe.
The utility model has the advantages that: compared with liquid phase alkali-adding dephenolization, the method has the advantages of good dephenolization effect, low alkali consumption, no need of washing for desalination, no need of multiple phase separation, no entrainment and continuous operation.
Drawings
Fig. 1 is a schematic view of the present invention.
As shown in the figure, a first alkali feeding pipe 1, a third alkali feeding pipe 2, a first dephenolizing tower 3, a first dephenolizing tower reboiler 4, a first transfer pump 6, a one-way valve 7, a second alkali feeding pipe 8, a second dephenolizing tower 9, a third transfer pump 10, a first condenser 11, a second condenser 12, a tower pressure control pipe 13, a first condensate tank 14, a second condensate tank 15, a fourth transfer pump 16, a fifth transfer pump 17, and a condensed water output pipe 18.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a process unit for removing phenolic impurities from benzyl alcohol comprises a first dephenolizing tower 3 and a second dephenolizing tower 9, wherein the upper end of the first dephenolizing tower 3 is connected in series with the second dephenolizing tower 9, and benzyl alcohol is continuously dephenolized in the first dephenolizing tower 3 and the second dephenolizing tower 9; a first circulation pipe is arranged at the lower end of the first dephenolizing tower 3, a first conveying pump 6 is communicated with a first dephenolizing tower reboiler 4 and the first circulation pipe, the first dephenolizing tower reboiler 4 is communicated with the first dephenolizing tower 3, a first alkali inlet pipe 1 is communicated with the first dephenolizing tower 3, and preferably, the lower end of the first dephenolizing tower reboiler 4 is connected with a third alkali inlet pipe 2; a second circulation pipe is arranged at the lower end of the second dephenolizing tower 9, a third conveying pump 10 is communicated with a second dephenolizing tower reboiler 5 and the second circulation pipe, the second dephenolizing tower reboiler 5 is communicated with the second dephenolizing tower 9, and a second alkali inlet pipe 8 is communicated with the second dephenolizing tower 9; the upper end of a second dephenolizing tower 9 is connected with a first condenser 11, the first condenser 11 is connected with a second condenser 12 in series, a light phase discharged from the second dephenolizing tower 9 is cooled in the first condenser 11 and the second condenser 12, preferably, the first condenser 11 is connected with the upper end of the second dephenolizing tower 9 through a first condensate tank 14 and a fourth conveying pump 16, liquid condensed by the first condenser 11 flows back to the second dephenolizing tower 9 through the first condensate tank 14 and the fourth conveying pump 16, and the light phase teasel root enters the second condenser 12 for cooling; the second condenser 12 is communicated with a condensed water output pipe 18 through a second condensed liquid tank 15 and a fifth delivery pump 17, the second condenser 12 is connected with a tower pressure control pipe 13, a tower pressure control electric valve 20 is arranged on the tower pressure control pipe 13, liquid cooled by the second condenser 12 is discharged through the second condensed liquid tank 15 and the fifth delivery pump 17 and the condensed water output pipe 18, light phase is discharged through the tower pressure control pipe 13, and the tower pressure control electric valve 20 controls the discharged flow.
Preferably, the first delivery pump 6 is connected with the third delivery pump 10 through a connecting pipe, the connecting pipe is provided with a one-way valve 7, when the alkali liquor of the second dephenolizing tower 9 is insufficient, the one-way valve 7 is opened, and the first delivery pump 6 delivers the alkali-containing liquid to the third delivery pump 10 through the one-way valve 7.
Claims (7)
1. A process units of phenol impurity in desorption benzyl alcohol, characterized by: the process device comprises a first dephenolizing tower and a second dephenolizing tower, wherein the upper end of the first dephenolizing tower is connected with the second dephenolizing tower in series; the lower end of the first dephenolizing tower is provided with a first circulating pipe, a first conveying pump is communicated with a first dephenolizing tower reboiler and the first circulating pipe, the first dephenolizing tower reboiler is communicated with the first dephenolizing tower, and a first alkali inlet pipe is communicated with the first dephenolizing tower; a second circulation pipe is arranged at the lower end of the second dephenolizing tower, a third conveying pump is communicated with a second dephenolizing tower reboiler and the second circulation pipe, the second dephenolizing tower reboiler is communicated with the second dephenolizing tower, and a second alkali inlet pipe is communicated with the second dephenolizing tower; and the upper end of the second dephenolizing tower is connected with a first condenser.
2. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 1, wherein: the first condenser is connected with the second condenser in series.
3. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 1, wherein: and the first condenser is connected with the upper end of the second dephenolizing tower through a first condensate tank and a fourth delivery pump.
4. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 2, wherein: and the second condenser is communicated with a condensed water output pipe through a second condensed water tank and a fifth delivery pump.
5. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 2, wherein: the second condenser is connected with a tower pressure control pipe, and a tower pressure control electric valve is arranged on the tower pressure control pipe.
6. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 1, wherein: the first delivery pump is connected with the third delivery pump through a connecting pipe, and a one-way valve is arranged on the connecting pipe.
7. The process unit for removing phenolic impurities from benzyl alcohol as claimed in claim 1, wherein: the lower end of the reboiler of the first dephenolizing tower is connected with a third alkali inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968765.5U CN212560046U (en) | 2020-06-01 | 2020-06-01 | Process unit for removing phenol impurities in benzyl alcohol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968765.5U CN212560046U (en) | 2020-06-01 | 2020-06-01 | Process unit for removing phenol impurities in benzyl alcohol |
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| Publication Number | Publication Date |
|---|---|
| CN212560046U true CN212560046U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020968765.5U Active CN212560046U (en) | 2020-06-01 | 2020-06-01 | Process unit for removing phenol impurities in benzyl alcohol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116003222A (en) * | 2022-12-16 | 2023-04-25 | 湖北科林博伦新材料有限公司 | Device and process for recycling benzyl alcohol and phenol from dephenolized residual liquid |
-
2020
- 2020-06-01 CN CN202020968765.5U patent/CN212560046U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116003222A (en) * | 2022-12-16 | 2023-04-25 | 湖北科林博伦新材料有限公司 | Device and process for recycling benzyl alcohol and phenol from dephenolized residual liquid |
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