CN111470966A - Environment-friendly methyl salicylate preparation facilities - Google Patents
Environment-friendly methyl salicylate preparation facilities Download PDFInfo
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- CN111470966A CN111470966A CN202010159475.0A CN202010159475A CN111470966A CN 111470966 A CN111470966 A CN 111470966A CN 202010159475 A CN202010159475 A CN 202010159475A CN 111470966 A CN111470966 A CN 111470966A
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- methyl salicylate
- rectification
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- heat medium
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/58—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses environment-friendly methyl salicylate preparation equipment, which comprises a grinding device for grinding plants, a purification device for purifying ethanol, a first condensation device for condensing and recovering ethanol, a water distillation mechanism, a separation device for performing water-oil separation, and a rectification device for rectification separation; methyl salicylate is extracted and purified from the holly leaves, and chemical synthesis of methyl salicylate is replaced, so that the method is more environment-friendly and has low cost; the preparation equipment is provided with the device capable of repeatedly recovering ethanol and ether, in the rectification stage, methyl salicylate in an oil layer is rectified and recovered, methyl salicylate in a water layer is extracted by ether, and after ether is distilled, methyl salicylate is rectified and recovered, so that the yield of methyl salicylate is improved.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to environment-friendly methyl salicylate preparation equipment.
Background
Methyl salicylate is an important chemical product, is extracted from holly plants at first, has the fragrance of the holly and has the functions of relieving pain and reducing fever; as flavors, they are commonly used as aromatizers in pharmaceutical preparations such as oral medicines and paints, and in chewing gums, ice creams, colas and mouthwashes. Methyl salicylate exists in wintergreen plants such as wintergreen, swertia herb and the like, the existing methyl salicylate is generally prepared by salicylic acid and methanol with the aid of a catalyst, and can also be extracted from the wintergreen plants, but the extraction efficiency of equipment for extracting the methyl salicylate from the plants is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides environment-friendly methyl salicylate preparation equipment.
The technical scheme for solving the problems comprises the following steps: an environment-friendly methyl salicylate preparation device comprises a grinding device for grinding plants, a purification device for purifying ethanol, a first condensation device for condensing and recovering ethanol, a water distillation mechanism, a separation device for water-oil separation, and a rectification device for rectification separation; the purification device comprises a first purification tank, a first jacket is sleeved outside the first purification tank, a first heat medium cavity is arranged in the first jacket, a heat medium inlet and a heat medium outlet are arranged on the first jacket, the first purification tank is connected with an inlet of a first condensing device through a first pipeline, an electromagnetic valve is arranged on the first pipeline, an outlet of a first condenser is connected with a grinding device through a second pipeline, a backflow pipeline is arranged on the side wall of the grinding device, and the backflow pipeline is connected with the first purification tank;
the water distillation mechanism includes that steam advances pipe and steam outlet pipe, steam advances a tub lower extreme and extends to set up in first purification tank bottoms portion, separator is connected to the steam outlet pipe, be equipped with the solenoid valve on the steam outlet pipe, separator divides union coupling rectifier unit through the oil reservoir, rectifier unit includes the rectification jar, and the cover is established and is pressed from both sides the cover at the outside second of rectification pipe, form second heat medium chamber in the second presss from both sides the cover, and the second presss from both sides to be equipped with heat medium import and the heat medium export that is linked together with second heat medium chamber in the cover, the rectification jar is used for retrieving the second condensing equipment of ether through the fourth pipe connection, and the rectification jar is used for retrieving the third condensing equipment of methyl salicylate through fifth pipe connection.
Furthermore, a crushing device is arranged in the grinding device.
Furthermore, a filter screen is arranged in the return pipeline.
Furthermore, a first temperature sensor is arranged at the top of the first purification tank and connected with a temperature measurement probe rod extending to the bottom of the tank.
Further, the separation device is connected with an ether extraction device through a water separation pipe, and the ether extraction device passes through a pipeline rectification device.
Furthermore, a second temperature sensor is arranged in the rectifying tank and connected with a temperature measuring probe rod extending to the bottom of the tank.
The invention has the following beneficial effects:
the invention provides environment-friendly methyl salicylate preparation equipment, which is more environment-friendly and low in cost by extracting and purifying methyl salicylate from holly leaves instead of chemically synthesizing methyl salicylate; the preparation equipment is provided with the device capable of repeatedly recovering ethanol and ether, in the rectification stage, methyl salicylate in an oil layer is rectified and recovered, methyl salicylate in a water layer is extracted by ether, and after ether is distilled, methyl salicylate is rectified and recovered, so that the yield of methyl salicylate is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure of a rectifying apparatus;
in the figure: 1-grinding device, 2-first condensing device, 3-purifying device, 4-separating device, 5-rectifying device, 6-first purifying tank, 7-first jacket, 8-first heat medium cavity, 9-first pipeline, 10-second pipeline, 11-mincing device, 12-reflux pipeline, 13-first temperature sensor, 14-temperature measuring probe rod, 15-steam inlet pipe, 16-steam outlet pipe, 17-diethyl ether extracting device, 18-rectifying tank, 19-second jacket, 20-second heat medium cavity, 21-second temperature sensor, 22-second condensing device and 23-third condensing device.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
An environment-friendly methyl salicylate preparation device comprises a grinding device for grinding plants, a purification device for purifying ethanol, a first condensation device for condensing and recovering ethanol, a water distillation mechanism, a separation device for water-oil separation, and a rectification device for rectification separation; the purification device comprises a first purification tank, a first jacket is sleeved outside the first purification tank, a first heat medium cavity is arranged in the first jacket, a heat medium inlet and a heat medium outlet are arranged on the first jacket, the first purification tank is connected with an inlet of a first condensing device through a first pipeline, an electromagnetic valve is arranged on the first pipeline, an outlet of a first condenser is connected with a grinding device through a second pipeline, a stirring device is arranged in the grinding device, a backflow pipeline is arranged on the side wall of the grinding device and connected with the first purification tank, a filter screen is arranged in the backflow pipeline, a first temperature sensor is arranged at the top of the first purification tank, and the first temperature sensor is connected with a temperature measurement probe rod extending to the bottom of the tank;
the water distillation mechanism comprises a steam inlet pipe and a steam outlet pipe, the lower end of the steam inlet pipe is arranged at the bottom of the first purification tank in an extending way, the steam outlet pipe is connected with a separation device, the steam outlet pipe is provided with an electromagnetic valve, the separation device is connected with a rectification device through an oil layer branch pipe, the separation device is connected with an ether extraction device through a water layer branch pipe, the ether extraction device passes through a pipeline rectification device which comprises a rectification tank and a second jacket sleeved outside a rectification pipe, a second heat medium cavity is formed in the second jacket, a heat medium inlet and a heat medium outlet which are communicated with the second heat medium cavity are arranged on the second jacket, a second temperature sensor is arranged in the rectifying tank and connected with a temperature measuring probe rod extending to the bottom of the tank, the rectification tank is connected with a second condensation device for recovering diethyl ether through a fourth pipeline, and the rectification tank is connected with a third condensation device for recovering methyl salicylate through a fifth pipeline.
According to the invention, pure ethanol is obtained by distillation and condensation, the pure ethanol flows into a grinding device, methyl salicylate in holly leaves is dissolved in ethanol, and other substances dissolved in the ethanol flow back to a first purification tank, a water distillation mechanism brings the methyl salicylate and other substances in the first purification tank into a separation device for water and oil separation, and the oil layer is directly rectified to recover a water layer, extracted by diethyl ether and then distilled and recovered; methyl salicylate is extracted and purified from the holly leaves, and chemical synthesis of methyl salicylate is replaced, so that the method is more environment-friendly and has low cost; the preparation equipment is provided with a device capable of repeatedly recovering ethanol and diethyl ether, in the rectification stage, methyl salicylate in an oil layer is rectified and recovered, methyl salicylate in a water layer is extracted by diethyl ether, and after the diethyl ether is distilled, methyl salicylate is rectified and recovered, so that the yield of methyl salicylate is improved
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
1. The utility model provides an environment-friendly methyl salicylate preparation equipment which characterized in that: an environment-friendly methyl salicylate preparation device comprises a grinding device for grinding plants, a purification device for purifying ethanol, a first condensation device for condensing and recovering ethanol, a water distillation mechanism, a separation device for water-oil separation, and a rectification device for rectification separation; the purification device comprises a first purification tank, a first jacket is sleeved outside the first purification tank, a first heat medium cavity is arranged in the first jacket, a heat medium inlet and a heat medium outlet are arranged on the first jacket, the first purification tank is connected with an inlet of a first condensing device through a first pipeline, an electromagnetic valve is arranged on the first pipeline, an outlet of a first condenser is connected with a grinding device through a second pipeline, a backflow pipeline is arranged on the side wall of the grinding device, and the backflow pipeline is connected with the first purification tank;
the water distillation mechanism includes that steam advances pipe and steam outlet pipe, steam advances a tub lower extreme and extends to set up in first purification tank bottoms portion, separator is connected to the steam outlet pipe, be equipped with the solenoid valve on the steam outlet pipe, separator divides union coupling rectifier unit through the oil reservoir, rectifier unit includes the rectification jar, and the cover is established and is pressed from both sides the cover at the outside second of rectification pipe, form second heat medium chamber in the second presss from both sides the cover, and the second presss from both sides to be equipped with heat medium import and the heat medium export that is linked together with second heat medium chamber in the cover, the rectification jar is used for retrieving the second condensing equipment of ether through the fourth pipe connection, and the rectification jar is used for retrieving the third condensing equipment of methyl salicylate through fifth pipe connection.
2. The environment-friendly methyl salicylate preparation apparatus of claim 1, wherein: and a crushing device is arranged in the grinding device.
3. The environment-friendly methyl salicylate preparation apparatus of claim 1, wherein: a filter screen is arranged in the return pipeline.
4. The environment-friendly methyl salicylate preparation apparatus of claim 1, wherein: the top of the first purification tank is provided with a first temperature sensor, and the first temperature sensor is connected with a temperature measurement probe rod extending to the bottom of the tank.
5. The environment-friendly methyl salicylate preparation apparatus of claim 1, wherein: the separation device is connected with an ether extraction device through a water separation pipe, and the ether extraction device passes through a pipeline rectification device.
6. The environment-friendly methyl salicylate preparation apparatus of claim 1, wherein: and a second temperature sensor is arranged in the rectifying tank and connected with a temperature measuring probe rod extending to the bottom of the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159475.0A CN111470966A (en) | 2020-03-10 | 2020-03-10 | Environment-friendly methyl salicylate preparation facilities |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010159475.0A CN111470966A (en) | 2020-03-10 | 2020-03-10 | Environment-friendly methyl salicylate preparation facilities |
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| Publication Number | Publication Date |
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| CN111470966A true CN111470966A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010159475.0A Pending CN111470966A (en) | 2020-03-10 | 2020-03-10 | Environment-friendly methyl salicylate preparation facilities |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233982A (en) * | 2021-04-30 | 2021-08-10 | 上海化工研究院有限公司 | Device and method for obtaining high-purity methyl salicylate through continuous rectification and purification |
-
2020
- 2020-03-10 CN CN202010159475.0A patent/CN111470966A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233982A (en) * | 2021-04-30 | 2021-08-10 | 上海化工研究院有限公司 | Device and method for obtaining high-purity methyl salicylate through continuous rectification and purification |
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Application publication date: 20200731 |