CN201848257U - Novel circulating hydrolyzing device - Google Patents

Abstract

The utility model discloses a novel circulating hydrolysis device, which is characterized in that it comprises a constant temperature magnetic stirrer, an oil bath, a three-necked flask, and a bracket. Above the device, the three-necked flask is located in the middle of the support and the bottle body of the three-necked flask is located in the oil bath; The liquid pipe and the liquid storage pipe are divided into three paths, the first path is connected to the return condensing pipe, the second path is connected to the first piston, the third path is connected to the second piston, and the second piston is connected to the overflow pipe through a rubber tube. The utility model adopts a circular reaction mode, which breaks the balance of the reversible reaction, and has the advantages of continuous sample injection, complete product separation, high hydrolysis yield and easy control.

Description

New circulating hydrolysis device

technical field

The utility model relates to a device for hydrolyzing organic substances in the technical field of chemical synthesis and decomposition, in particular to a novel circulating hydrolysis device.

Background technique

The hydrolysis device that the laboratory of prior art carries out hydrolysis test is generally reflux device. Since the hydrolysis reaction of organic chemical substances is generally a reversible reaction, in an ordinary reflux device, the substrate, solvent, catalyst, and reaction product are mixed together, so that the reversible reaction can quickly reach equilibrium. Limited by the reaction balance, the hydrolysis yield cannot be increased. The purpose of complete hydrolysis of the reaction product cannot be achieved, resulting in low hydrolysis yield, resulting in waste of raw materials and catalysts, which is contrary to the requirements of green chemistry. In order to improve the hydrolysis yield, the operating procedure of product separation has to be increased.

Utility model content

The purpose of this utility model is a kind of circulation hydrolysis device designed for the deficiencies in the prior art, it adopts the mode of circulation reaction, has broken the balance of reversible reaction, has continuous sampling, product separation is complete, hydrolysis yield is high, The advantage of being easy to handle.

The concrete technical scheme that realizes the utility model purpose is:

A new type of circulating hydrolysis device, which features a constant temperature magnetic stirrer, an oil bath, a three-necked flask, and a bracket. The constant temperature magnetic stirrer is arranged at the bottom of the bracket, and the oil bath is arranged above the constant temperature magnetic stirrer. The neck flask is arranged in the middle part of the support and the bottle body of the three-necked flask is located in the oil bath; the three-necked flask is respectively provided with a fractionation tube, a sample injector and an overflow tube, and the fractionation tube is connected with a liquid storage pipe, and the liquid storage The pipe is divided into three paths, the first path is connected to the return condensing pipe, the second path is connected to the first piston, the third path is connected to the second piston, and the second piston is connected to the overflow pipe through a rubber tube.

The utility model adopts a circular reaction method, which breaks the balance of the reversible reaction, and has the advantages of continuous sample injection, complete product separation, high hydrolysis yield and easy control.

Description of drawings

Figure 1 is a schematic structural view of the utility model.

Detailed ways

Referring to Fig. 1, the utility model comprises constant temperature magnetic stirrer 1, oil bath 2, three-necked flask 3, support 4, and described constant temperature magnetic stirrer 1 is located at the bottom of support 4, and oil bath 2 is located at constant temperature magnetic stirrer Above the device 1, the three-necked flask 3 is located in the middle of the support 4 and the bottle body of the three-necked flask 3 is located in the oil bath 2; The flow pipe 8 and the fractionating pipe 5 are connected to the liquid storage pipe 7, and the liquid storage pipe 7 is divided into three paths, the first path is connected to the reflux condensation pipe 12, the second path is connected to the first piston 11, and the third path is connected to the second piston 10. The second piston 10 is connected with the overflow pipe 8 through the rubber tube 9 .

The utility model is used like this:

Referring to Fig. 1, take acetal hydrolysis as example to illustrate the working process of the present utility model, fill substrate acetal, water and catalyst in the three-necked flask 3 by sample injector 6, control oil bath 2 through constant temperature magnetic stirrer 1 The heating temperature is to heat the oil bath of the three-necked flask 3, so that the substrate acetal, water and catalyst react in the three-necked flask 3 for a period of time to generate corresponding alcohol and aldehyde, and make the water and alcohol azeotrope, due to the acetal The boiling point of alcohol is much higher than that of water and alcohol, so the content of acetal in the azeotropic component is extremely low. Alcohol and water pass through fractionation tube 5, liquid storage tube 7 and reflux condenser tube 12, and are stored in the storage liquid after being condensed by reflux condenser tube 12. In the pipe 7, since the density of alcohol is less than that of water, the alcohol is at the top of the liquid storage pipe 7, and the water is at the bottom of the liquid storage pipe 7. The height of the overflow pipe 8 is adjusted according to the liquid storage volume and density difference, and the water and the generated The aldehyde can be circulated to the three-necked flask 3 through the piston 10, and the generated alcohol can be separated from the reaction system through the piston 11, and the continuous injection of the sampler 6 can realize the complete hydrolysis of the acetal and the continuous separation of the reaction product.

The utility model is suitable for a reaction system in which a hydrolyzate and a solvent can azeotrope, have a certain density difference, and have obvious differences in the dissolving amount of each hydrolyzate in the solvent, and is especially suitable for the hydrolysis of acetal.

Claims (1)

1. A novel circulating hydrolysis device is characterized in that it comprises a constant temperature magnetic stirrer (1), an oil bath (2), a three-necked flask (3), a support (4), and the constant temperature magnetic stirrer (1) Set at the bottom of the bracket (4), the oil bath (2) is set above the constant temperature magnetic stirrer (1), the three-necked flask (3) is set in the middle of the bracket (4) and the bottle of the three-necked flask (3) The body is located in the oil bath (2); the three-necked flask (3) is respectively provided with a fractionation tube (5), a sampler (6) and an overflow tube (8), and the fractionation tube (5) is connected to the storage The liquid pipe (7) and the liquid storage pipe (7) are divided into three paths, wherein the first path is connected to the reflux condensation pipe (12), the second path is connected to the first piston (11), and the third path is connected to the second piston (10 ), the second piston (10) is connected with the overflow pipe (8) through the rubber tube (9).

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