CN211586954U - Production device of m/p-phthaloyl chloride of air milling raw material - Google Patents
Production device of m/p-phthaloyl chloride of air milling raw material Download PDFInfo
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- CN211586954U CN211586954U CN201922448439.1U CN201922448439U CN211586954U CN 211586954 U CN211586954 U CN 211586954U CN 201922448439 U CN201922448439 U CN 201922448439U CN 211586954 U CN211586954 U CN 211586954U
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Abstract
The utility model relates to a production device of meta/paraphthaloyl chloride of pneumatic grinding raw materials, which belongs to the technical field of chemical synthesis production equipment. The utility model provides a current problem of paraphthaloyl chloride between. The utility model comprises an airflow mill for performing airflow grinding on solid isophthalic acid/terephthalic acid, wherein an airflow inlet pipeline is arranged on one side of the airflow mill, and an isophthalic acid/terephthalic acid feeding pipeline is arranged on the top of the airflow mill; the primary cyclone separator is used for separating gas and m/p-phthalic acid powder, the primary cyclone separator is communicated with the output end of the airflow mill through a pipeline, and the discharge end of the primary cyclone separator is connected with an ultrafine powder intermediate tank through a pipeline.
Description
Technical Field
The utility model relates to a production device of meta/paraphthaloyl chloride of pneumatic grinding raw materials, which belongs to the technical field of chemical synthesis production equipment.
Background
M/P-phthaloyl chloride, also known as terephthaloyl dichloride, TPC or TCL for short, is an important fine chemical product, is mainly used as a polymeric monomer of poly (p-phenylene terephthalamide) (aramid 1414 or PPTA for short) and polysulfonamide, and has certain application in synthesis of permeable membrane materials, high polymer materials and pesticides. Due to the excellent characteristics of aramid 1414, the aramid 1414 has a wide application field and is a new material which is emphasized and developed in China. The quality of the paraphthaloyl chloride serving as one of the important raw materials of the aramid fiber 1414 is directly related to the product performance of the downstream aramid fiber 1414, and along with the rapid development of the aramid fiber industry in China, the demand of the paraphthaloyl chloride is rapidly increased, and meanwhile, higher requirements are provided for the quality of the paraphthaloyl chloride.
The existing production device has long reaction time, and reaction tail gas cannot be discharged out of a system in time, so that the production rate of a reaction process is restricted; meanwhile, the raw materials of the reaction, i.e. the m-terephthalic acid and the terephthalic acid, have larger particles, so that the reaction speed is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome the above-mentioned defect that present between/p terephthaloyl chloride apparatus for producing exist, provided a production facility of between/p terephthaloyl chloride of air mill raw materials, the air current mill carries out the raw materials and smashes, improves the area of contact with the reactant for the reaction is more abundant, improves the efficiency of reaction, and the gaseous phase is managed to find time drive arrangement simultaneously and can be for the gaseous phase shifts to provide better drive power promotion reaction tail gas's discharge, accelerates going on of reaction.
The utility model discloses an adopt following technical scheme to realize:
a production device of m/p-phthaloyl chloride of an air grinding raw material comprises:
the jet mill is used for carrying out jet milling on solid m/terephthalic acid, a gas flow inlet pipeline is arranged at one side of the jet mill, and an m/terephthalic acid passing feed pipeline is arranged at the top of the jet mill;
the primary cyclone separator is used for separating gas and m/p-phthalic acid powder, the primary cyclone separator is communicated with the output end of the airflow mill through a pipeline, and the discharge end of the primary cyclone separator is connected with an ultrafine powder intermediate tank through a pipeline;
the reaction kettle is used for reacting the m/terephthalic acid and the thionyl chloride, the reaction kettle is communicated with the superfine powder intermediate tank, and a thionyl chloride feeding pipeline and a catalyst feeding pipeline are arranged at the upper part of the reaction kettle;
the gas phase separation mechanism is used for extracting gas phase generated in the reaction kettle and comprises a thionyl chloride recovery mechanism and a gas phase evacuation driving device, and one end of the gas phase evacuation driving device is transferred to the tail gas treatment mechanism through a tail gas absorption pipeline;
the thionyl chloride recovery mechanism is communicated with the reaction kettle through a gas phase lifting pipe, the gas phase lifting pipe is communicated with a condenser, the condenser is communicated to the reaction kettle through a liquid phase return pipe, and the condenser is communicated with a gas phase evacuation driving device through a tail gas pipeline.
Preferably, the condenser comprises a reaction first-stage condenser and a reaction second-stage condenser which are connected in series, the reaction first-stage condenser and the reaction second-stage condenser are both communicated to the reaction kettle through a liquid phase return pipe, and the reaction second-stage condenser is communicated to the gas phase evacuation driving device through a tail gas pipeline.
Preferably, the gas phase evacuation driving device comprises a thionyl chloride tank, the bottom of the thionyl chloride tank is communicated to an ejector through a circulating pipeline, the ejector is communicated with the tail gas pipeline, and the circulating pipeline is connected with a circulating pump.
Preferably, the rear end of the primary cyclone separator is connected with a secondary cyclone separator in series, and the top air outlet end of the secondary cyclone separator is connected to a gas dust removal device through a dust removal pipeline.
The utility model has the advantages that:
(1) the utility model discloses a production device of meta/p-phthaloyl chloride of air mill raw materials, be provided with the jet mill, carry out the air current through the jet mill and grind meta/p-phthalic acid, meta/p-phthalic acid after grinding can reach 40-50 microns for meta/p-phthalic acid can be better with thionyl chloride react, the reaction is more abundant, reaction rate is faster;
(2) the apparatus for producing of the interval of air mill raw materials/p terephthaloyl chloride, be provided with the gaseous phase drive arrangement that evacuates, for the gaseous phase after the reaction provides power, tail gas after the reaction of in time discharging, the production efficiency of further improvement reaction.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
in the figure: 1. the method comprises the following steps that (1) m/terephthalic acid enters a pipeline through a feeding pipeline (2) and an airflow inlet pipeline (3), an airflow mill (4), a primary cyclone separator (5) and a secondary cyclone separator (5); 6. the system comprises a dust removal pipeline, a 7 ultrafine powder intermediate tank, 8 a reaction kettle, 9 a thionyl chloride feeding pipeline, 10 a gas phase lifting pipe, 11 a reaction primary condenser, 12 a reaction secondary condenser, 13 a liquid phase return pipe, 14 a tail gas pipeline, 15 an ejector, 16 a thionyl chloride tank, 17 a circulating pump, 18 a tail gas absorption pipeline, 19 and a catalyst feeding pipeline.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a production device of meta/p-phthaloyl chloride of air milling raw material, include:
the jet mill 3 is used for carrying out jet milling on solid isophthalic acid, a gas flow inlet pipeline 2 is arranged on one side of the jet mill 3, and the top of the jet mill 3 is provided with an isophthalic acid passing feed pipeline 1;
the primary cyclone separator 4 is used for separating gas and m/p-phthalic acid powder, the primary cyclone separator 4 is communicated with the output end of the jet mill 3 through a pipeline, and the discharge end of the primary cyclone separator 4 is connected with an ultrafine powder intermediate tank 7 through a pipeline;
a reaction kettle 8 for the reaction of the m/p-phthalic acid and the thionyl chloride, wherein the reaction kettle 8 is communicated with the superfine powder intermediate tank 7, and the upper part of the reaction kettle 8 is provided with a thionyl chloride feeding pipeline 9 and a catalyst feeding pipeline 19;
the gas phase separation mechanism is used for extracting and separating gas phase generated in the reaction kettle 8 and comprises a thionyl chloride recovery mechanism and a gas phase evacuation driving device, and one end of the gas phase evacuation driving device is transferred to the tail gas treatment mechanism through a tail gas absorption pipeline 18;
the thionyl chloride recovery mechanism is communicated with the reaction kettle 8 through a gas phase lifting pipe 10, the gas phase lifting pipe 10 is communicated with a condenser, the condenser is communicated with the reaction kettle 8 through a liquid phase return pipe 13, and the condenser is communicated with a gas phase evacuation driving device through a tail gas pipeline 14.
The condenser include the reaction first order condenser 11 and the reaction second order condenser 12 that concatenate, reaction first order condenser 11 and reaction second order condenser 12 all communicate to reation kettle 8 through liquid phase back flow 13 on, reaction second order condenser 12 communicates to the gaseous phase through tail gas pipeline 14 and evacuates on the drive arrangement.
The gas phase evacuation driving device comprises a thionyl chloride tank 16, the bottom of the thionyl chloride tank 16 is communicated to an ejector 15 through a circulating pipeline, the ejector 15 is communicated with the tail gas pipeline 14, and the circulating pipeline is connected with a circulating pump 17.
The rear end of the primary cyclone separator 4 is connected with a secondary cyclone separator 5 in series, and the top air outlet end of the secondary cyclone separator 5 is connected to a gas dust removing device through a dust removing pipeline 6.
The utility model discloses a working process as follows:
the m/p-phthalic acid enters an airflow mill 3 through a feeding pipeline 1, the materials collide with each other under the driving of airflow, so that the particle size of the m/p-phthalic acid is reduced, the m/p-phthalic acid is separated by a primary cyclone separator 4 and a secondary cyclone separator 5, a gas phase is connected to a gas dust removal device through a dust removal pipeline 6, and the ultrafine powder enters an ultrafine powder intermediate tank 7 for temporary storage; the powder is put into a reaction kettle 8 and enters the reaction kettle 8 through a thionyl chloride feed line 9, gas in the reaction process is led out through a gas phase lifting pipe 10, passes through a reaction primary condenser 11 and a reaction secondary condenser 12, thionyl chloride in the gas is condensed into a liquid phase, and flows back to the reaction kettle 8 through a return pipe 13 to continue the reaction, the gas phase reaches a tail gas line 14, the gas phase is rapidly separated out of the reaction kettle 8 through a gas phase evacuation driving device (composed of an ejector 15, a thionyl chloride tank 16 and a circulating pump 17), the reaction is carried out in the forward direction, and then the gas phase is removed from an absorption pipeline 18 through a tail gas removal treatment device.
The comparison with the original production directly using the m/p-phthalic acid raw material without air stream grinding is as follows:
TABLE 1 comparison of M/P-phthaloyl chloride
The utility model discloses mainly apply to between/the place that the paraphthaloyl chloride carries out the production.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (4)
1. A production device of m/p-phthaloyl chloride of an air grinding raw material is characterized by comprising the following components:
the jet mill (3) is used for carrying out jet milling on solid m/terephthalic acid, a gas flow inlet pipeline (2) is arranged at one side of the jet mill (3), and an m/terephthalic acid passing feeding pipeline (1) is arranged at the top of the jet mill (3);
the primary cyclone separator (4) is used for separating gas and m/p-phthalic acid powder, the primary cyclone separator (4) is communicated with the output end of the airflow mill (3) through a pipeline, and the discharge end of the primary cyclone separator (4) is connected with an ultrafine powder intermediate tank (7) through a pipeline;
a reaction kettle (8) for the reaction of the m/terephthalic acid and the thionyl chloride, wherein the reaction kettle (8) is communicated with the superfine powder intermediate tank (7), and the upper part of the reaction kettle (8) is provided with a thionyl chloride feeding pipeline (9) and a catalyst feeding pipeline (19);
the gas phase separation mechanism is used for extracting and separating gas phase generated in the reaction kettle (8), and comprises a thionyl chloride recovery mechanism and a gas phase evacuation driving device, wherein one end of the gas phase evacuation driving device is transferred to the tail gas treatment mechanism through a tail gas absorption pipeline (18);
the thionyl chloride recovery mechanism is communicated with a reaction kettle (8) through a gas phase lifting pipe (10), the gas phase lifting pipe (10) is communicated with a condenser, the condenser is communicated to the reaction kettle (8) through a liquid phase return pipe (13), and the condenser is communicated with a gas phase evacuation driving device through a tail gas pipeline (14).
2. The apparatus for producing m/p-phthaloyl chloride as a raw material for an air mill according to claim 1, characterized in that: the condenser including reaction one-level condenser (11) and reaction secondary condenser (12) that concatenate, reaction one-level condenser (11) and reaction secondary condenser (12) all communicate on reation kettle (8) through liquid phase back flow (13), reaction secondary condenser (12) communicate on the gaseous phase drive arrangement that evacuates through exhaust line (14).
3. The apparatus for producing m/p-phthaloyl chloride as a raw material for an air mill according to claim 2, characterized in that: the gas phase evacuation driving device comprises a thionyl chloride tank (16), the bottom of the thionyl chloride tank (16) is communicated to an ejector (15) through a circulating pipeline, the ejector (15) is communicated with the tail gas pipeline (14), and the circulating pipeline is connected with a circulating pump (17).
4. The apparatus for producing m/p-phthaloyl chloride as a raw material for an air mill according to claim 3, characterized in that: the rear end of the primary cyclone separator (4) is connected with a secondary cyclone separator (5) in series, and the top air outlet end of the secondary cyclone separator (5) is connected to a gas dust removal device through a dust removal pipeline (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922448439.1U CN211586954U (en) | 2019-12-28 | 2019-12-28 | Production device of m/p-phthaloyl chloride of air milling raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922448439.1U CN211586954U (en) | 2019-12-28 | 2019-12-28 | Production device of m/p-phthaloyl chloride of air milling raw material |
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| Publication Number | Publication Date |
|---|---|
| CN211586954U true CN211586954U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922448439.1U Active CN211586954U (en) | 2019-12-28 | 2019-12-28 | Production device of m/p-phthaloyl chloride of air milling raw material |
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| CN (1) | CN211586954U (en) |
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