CN210449119U - Resin polymerization reaction system - Google Patents

Abstract

The utility model relates to a chemical industry technical field relates to a resin polymerization reaction system. Including reation kettle, first condenser, second condenser and knockout drum, reation kettle's top and first condenser intercommunication, the export of first condenser is through first pipeline intercommunication with the top of knockout drum, first condenser passes through the condensation duct intercommunication with the second condenser, be equipped with first valve on the condensation duct, the export of second condenser passes through second pipeline and first pipeline intercommunication, the knockout drum bottom is through backflow pipeline and reation kettle top intercommunication, the bottom export and the waste liquid jar intercommunication of knockout drum, reation kettle upper portion is equipped with the batch feed jar with reation kettle intercommunication. The utility model discloses the impurity that the side reaction produced can be detached to resin polymerization reaction system, improves polypropylene resin's degree of polymerization and finished product quality.

Description

Resin polymerization reaction system

Technical Field

The utility model belongs to the technical field of the chemical industry technique and specifically relates to a resin polymerization reaction system is related to.

Background

The development of the acrylic resin industry in China is rapid, the product output is continuously expanded for many years, the development of the acrylic resin industry to a high-technology product is encouraged by national industry policies, the product development is promoted, and newly added investment projects of domestic enterprises are gradually increased. The increasing interest of investors in the acrylic industry has led to an increased need for development research in the acrylic industry. China pays great attention to the technical development of acrylic resin, introduces a plurality of profound engineers in the industry in sequence, uses a systematic research method on an experimental method, and carries out summary and communication continuously, thereby improving the research and development level of related personnel. At present, the variety of acrylic resin in China is relatively perfect, but compared with the prior art in foreign countries, a certain distance exists among products with production scale, process control and part of special properties, particularly in the aspects of process control and quality stability. Therefore, in the coming years, a more advanced automatic control system is adopted to ensure that the process control of the product can be kept consistent, so that the stability of the quality is further improved, particularly the quality of the product is required to reach the level of foreign manufacturers, and the development of the acrylic resin is urgent and fundamental.

Chinese patent publication No. CN208082480 discloses a cooling reflux system for producing acrylic resin for printing, which comprises a reaction kettle and a circulating water pump, wherein an inner cooling pipe is arranged on the inner side of the reaction kettle, a feeding pipe is arranged above the inner part of the reaction kettle, a discharging pipe is arranged below the inner part of the reaction kettle, a shell water collecting tank is arranged on the right side below a shell circulating water pipe, a second cooling liquid upper water pipe is connected to the right side of the second cooling liquid circulating water pipe, a second refrigerator is arranged on the right side of the first refrigerator, a water supplementing barrel is arranged on the right side of the second refrigerator, a first cooling liquid upper water pipe is connected to the left side above the second refrigerator, a water pump is arranged on the left side of the first cooling liquid upper water pipe, in the technical scheme, the acrylic monomer is adopted to prepare high molecular polyacrylic resin by a copolymerization method, but the acrylic monomer generates impurities in a side reaction in the copolymerization process, affecting the polymerization degree of the polyacrylic resin and the quality of finished products.

Disclosure of Invention

The utility model relates to an overcome prior art acrylic acid monomer and produce impurity at copolymerization in-process subsidiary side reaction, influence the polymerization degree of polypropylene resin and the problem of finished product quality, provide a resin polymerization reaction system, this resin polymerization reaction system can detach the impurity that the side reaction produced, improves the polymerization degree and the finished product quality of polypropylene resin.

In order to achieve the above purpose, the utility model adopts the following technical scheme: including reation kettle, first condenser, locate second condenser and knockout drum of first condenser top, reation kettle's top and first condenser intercommunication, the export of first condenser is established ties through first pipeline with the top of knockout drum, first condenser passes through the condensation duct intercommunication with the second condenser, be equipped with first valve on the condensation duct, the export of second condenser passes through second pipeline and first pipeline intercommunication, the knockout drum bottom is through backflow pipeline and reation kettle top intercommunication, the below of knockout drum is equipped with the waste liquid jar, the bottom export and the waste liquid jar intercommunication of knockout drum, the reation kettle top is equipped with the feeding tank with reation kettle intercommunication.

The utility model discloses a top at reation kettle sets up first condenser and second condenser, need go on under the high temperature condition in the acrylic resin preparation process, the micromolecule organic matter impurity that is used for synthetic acrylic resin's monomer (methacrylic acid, methyl methacrylate, ethyl methacrylate etc.) and side reaction to generate under the high temperature is heated and evaporates, the above-mentioned material of evaporation cools off into liquid in getting into the condenser, first condenser plays the effect of primary cooling, the second condenser plays further refrigerated effect, make raw materials monomer and impurity micromolecule organic matter cool off into liquid and get into in the knockout drum. When the acrylic resin is produced in small batches, the monomers and the impurities can be completely cooled through the first condenser, and the first valve on the condensation pipeline is closed at the moment, so that the energy is saved. After the monomer enters the separation tank, the pressure in the separation tank is adjusted to volatilize the monomer with low boiling point, the impurity liquid with high boiling point is discharged into a waste liquid tank, and then the pressure is adjusted to change the monomer with low boiling point into liquid which flows into the reaction kettle to participate in the reaction again. The utility model discloses detach the impurity that the side reaction produced at monomer condensation backward flow in-process, improve polyacrylic resin's finished product quality.

Preferably, the separator further comprises a third condenser, the upper part of the separation tank is communicated with an inlet of the third condenser, and an outlet of the third condenser is communicated with a waste liquid tank.

After the monomer enters the separation tank, the pressure in the separation tank is adjusted to volatilize the monomer with low boiling point, the impurity liquid with high boiling point is discharged into the waste liquid tank, then the pressure in the separation tank is adjusted again to change the monomer with low boiling point into liquid to flow back into the reaction kettle, after the synthesis reaction is finished, a small amount of volatilized monomer and impurity still remain in the separation tank, and the monomer and the impurity are condensed into liquid through the condensation effect of the condenser and then enter the waste liquid tank.

Preferably, the first pipeline is communicated with the return pipeline through a third pipeline, and a second valve is arranged on the third pipeline.

When reaction parameter adjusts accurately, detect in the reation kettle volatilize get into the reaction monomer in the first condenser when thoughtlessly having impurity less, can save the separation flow of knockout drum, during condensation monomer direct reflux after the condensation improved production efficiency in the reation kettle.

Preferably, the outlet of the reaction kettle is communicated with the top of the reaction kettle through a circulating pipeline, and a first pump is arranged on the circulating pipeline.

In the resin diluting process, a solvent is required to be introduced into the reaction kettle to enable the resin on the kettle wall to enter the diluting kettle along with the solvent, and the circulating pipeline can enable the solvent in the reaction kettle to circularly wash the kettle wall, so that the solvent is saved.

Preferably, the reactor further comprises a dilution kettle, the top of the dilution kettle is communicated with the outlet of the reaction kettle through a dilution pipeline, and a third valve is arranged on the dilution pipeline.

Preferably, the device also comprises a filter, an outlet of the dilution kettle is communicated with an inlet of the filter through a filter pipeline, and a second pump is arranged on the filter pipeline. The filter filters the acrylic resin in the dilution kettle to realize the separation of the acrylic resin and the solvent.

Preferably, an auxiliary feeding tank communicated with the reaction kettle is arranged above the reaction kettle. The auxiliary feeding tank is used for feeding initiator, butanol and ethanol solvent and the like.

Therefore, the utility model discloses following beneficial effect has: (1) the working amount of the condenser is adjusted according to the production amount of the acrylic resin, so that energy is saved; (2) impurities generated by side reaction are removed in the monomer condensation and reflux process, and the quality of the finished product of the polyacrylic resin is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals

The system comprises a reaction kettle 1, a first condenser 2, a second condenser 3, a separation tank 4, a first pipeline 51, a condensation pipeline 52, a first valve 521, a second pipeline 53, a return pipeline 54, a waste liquid tank 6, a feeding tank 11, a third condenser 7, a third pipeline 55, a second valve 551, a circulating pipeline 56, a first pump 561, a dilution kettle 8, a dilution pipeline 57, a third valve 571, a filtering pipeline 58, a second pump 581 and an auxiliary feeding tank 12.

Detailed Description

The technical solution of the present invention is further explained by the following specific embodiments.

Example 1

As shown in fig. 1, the resin polymerization system of the present invention includes a reaction kettle 1, a first condenser 2, a second condenser 3, a third condenser 7, a separation tank 4, a dilution kettle 8 and a filter 9, wherein a bottom outlet of the reaction kettle is communicated with a top of the reaction kettle through a circulation pipeline 56, and a first pump 561 is disposed on the circulation pipeline; the top of the reaction kettle is communicated with a first condenser, an outlet of the first condenser is communicated with the top of a separation tank through a first pipeline 51, a second condenser is arranged above the first condenser, the first condenser and the second condenser are connected in series through a condensation pipeline 52, a first valve 521 is arranged on the condensation pipeline, an outlet of the second condenser is communicated with the first pipeline through a second pipeline 53, the bottom of the separation tank is communicated with the top of the reaction kettle through a return pipeline 54, the first pipeline is communicated with the return pipeline through a third pipeline 55, a second valve 551 is arranged on the third pipeline, a waste liquid tank 6 is arranged below the separation tank, an outlet at the bottom of the separation tank is communicated with the waste liquid tank 6, and a feeding tank 11 and a feeding auxiliary tank 12 which are communicated with the reaction kettle are arranged above the reaction kettle; the upper part of the separation tank is communicated with an inlet of a third condenser, and an outlet of the third condenser is communicated with a waste liquid tank; the top of the dilution kettle is communicated with the outlet of the reaction kettle through a dilution pipeline 57, the dilution pipeline is provided with a third valve 571, the outlet of the dilution kettle is communicated with the inlet of the filter through a filter pipeline 58, and the filter pipeline is provided with a second pump 581.

The preparation process of the acrylic resin needs to be carried out under a high-temperature condition, monomer raw materials such as methacrylic acid, methyl methacrylate, ethyl methacrylate and the like for synthesizing the acrylic resin at the high temperature and micromolecule organic matter impurities generated by side reactions are easy to be heated and evaporated, the evaporated substances enter a condenser to be cooled into liquid, the first condenser plays a role in primary cooling, the second condenser plays a role in further cooling, and the raw material monomers and the impurity micromolecule organic matter are cooled into liquid to enter a separation tank. When the acrylic resin is produced in small batches, the monomers and the impurities can be completely cooled through the first condenser, and the first valve on the condensation pipeline is closed at the moment, so that the energy is saved. After the monomer enters the separation tank, the pressure in the separation tank is adjusted to volatilize the monomer with low boiling point, the impurity liquid with high boiling point is discharged into the waste liquid tank, then the pressure is adjusted to change the monomer with low boiling point into liquid to flow into the reaction kettle to participate in the reaction again, after the synthesis reaction is finished, a small amount of volatilized monomer and impurity still remain in the separation tank, and the monomer and the impurity are condensed into liquid through the condensation effect of the third condenser and then enter the waste liquid tank. Diluting a product synthesized in the reaction kettle through a dilution kettle, dissolving impurities mixed on the resin into a solvent by using a diluent, filtering the diluted resin product in a filter, and separating a small amount of impurities in the reaction product through the solvent to obtain relatively pure resin.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims (7)

1. A resin polymerization reaction system is characterized by comprising a reaction kettle (1), a first condenser (2), a second condenser (3) and a separation tank (4) which are arranged above the first condenser, the top of the reaction kettle is communicated with a first condenser, the outlet of the first condenser is communicated with the top of the separation tank through a first pipeline (51), the first condenser and the second condenser are connected in series through a condensing pipeline (52), a first valve (521) is arranged on the condensing pipeline, the outlet of the second condenser is communicated with the first pipeline through a second pipeline (53), the bottom of the separation tank is communicated with the top of the reaction kettle through a reflux pipeline (54), a waste liquid tank (6) is arranged below the separation tank, an outlet at the bottom of the separation tank is communicated with the waste liquid tank, and a feeding tank (11) communicated with the reaction kettle is arranged above the reaction kettle.

2. A resin polymerization system as claimed in claim 1, further comprising a third condenser (7), wherein the upper part of the separation tank is communicated with an inlet of the third condenser, and an outlet of the third condenser is communicated with a waste liquid tank.

3. A resin polymerization system as claimed in claim 1, wherein the first conduit is connected to the return conduit via a third conduit (55), and the third conduit is provided with a second valve (551).

4. The resin polymerization reaction system as claimed in claim 1, wherein the bottom outlet of the reaction vessel is connected to the top of the reaction vessel via a circulation pipe (56), and the circulation pipe is provided with a first pump (561).

5. The resin polymerization reaction system according to claim 1, further comprising a dilution tank (8), wherein the top of the dilution tank is communicated with the outlet of the reaction tank through a dilution pipe (57), and the dilution pipe is provided with a third valve (571).

6. A resin polymerization reaction system as claimed in claim 5, further comprising a filter (9), wherein the outlet of the dilution tank is communicated with the inlet of the filter through a filtering pipe (58), and the filtering pipe is provided with a second pump (581).

7. A resin polymerization system as claimed in claim 1, wherein an auxiliary feed tank (12) is provided above the reaction vessel and communicates with the reaction vessel.

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