CN110102237B - Production method and production equipment of closed isocyanate - Google Patents
Production method and production equipment of closed isocyanate Download PDFInfo
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- CN110102237B CN110102237B CN201910342719.6A CN201910342719A CN110102237B CN 110102237 B CN110102237 B CN 110102237B CN 201910342719 A CN201910342719 A CN 201910342719A CN 110102237 B CN110102237 B CN 110102237B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
- B01J19/1868—Stationary reactors having moving elements inside resulting in a loop-type movement
- B01J19/1881—Stationary reactors having moving elements inside resulting in a loop-type movement externally, i.e. the mixture leaving the vessel and subsequently re-entering it
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/02—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups from isocyanates with formation of carbamate groups
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
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Abstract
The invention discloses a production method and production equipment of closed isocyanate, and belongs to the technical field of preparation of closed isocyanate. Adding an isocyanate monomer, a sealing agent and a solvent into a reaction kettle unit of production equipment for heating and stirring reaction, opening a circulating pump of a circulating unit, and feeding gaseous reactants and the solvent into a condensation container through a circulating air inlet pipe under the driving of the circulating pump to react to obtain sealed isocyanate; the blocked isocyanate is conveyed to a storage tank of the storage unit through the discharging unit. After the production of the closed isocyanate is finished, the closed isocyanate is directly conveyed to the storage tank of the storage unit through the discharging unit, so that the continuity and the production efficiency of the production process of the closed isocyanate are improved.
Description
The patent application of the invention is a divisional application with an application number of 2016112085211, and the application date of the original application is as follows: 2016-12-23, named as: a production device for preparing blocked isocyanate.
Technical Field
The invention belongs to the technical field of preparation of blocked isocyanate, and particularly provides a production method and production equipment of blocked isocyanate.
Background
Isocyanates are a generic term for the various esters of isocyanic acid and include, if classified by the number of-NCO groups, monoisocyanates R-N ═ C ═ O and diisocyanates O ═ C ═ N-R-N ═ C ═ O and polyisocyanates, and the like. Monoisocyanate is an important intermediate in organic synthesis, can be prepared into a series of carbamate pesticides, bactericides and herbicides, and is also used for improving the water resistance of plastics, fabrics, leather and the like.
Blocking of isocyanate groups was reported in 1949, Petersen first reported a study of blocking of free isocyanate groups[1]. Then, extensive research was conducted on blocked isocyanates by Wicks et al[2-6]And a detailed discussion of various isocyanate blocking agents[2]. In 1980, the Japanese academy was also commented on the chemistry of blocked isocyanates in great house[3]。
The blocked polyurethane is a product obtained by blocking an isocyanate group with a blocking agent. By blocking, a one-component product can be made. Under certain temperature and other conditions, the isocyanate group in the closed polyurethane is regenerated and generates crosslinking reaction to generate the thermosetting polyurethane[1]。
The blocked isocyanate is widely applied to preparing coatings, waterborne polyurethane, crosslinking agents of modified thermoplastic resins and the like, and is used as coatings, adhesives, cladding materials, coatings and the like of enameled wires, fabrics, leather, paper, wood metal, plastics and the like; it can also be used as printing and dyeing and papermaking auxiliary agent, anti-creasing agent and anti-shrinking agent of fabric, adhesive of synthetic fiber fabric and rubber and anti-delaminating agent, etc. Particularly in the production of rubber products such as tires and adhesive tapes, the strength of the fiber material can be improved by subjecting the composition of blocked isocyanate and water-soluble epoxy to a dipping treatment.
The closed isocyanate is a water-based dipping material, and the strength of the fiber material can be improved through dipping treatment. In the existing preparation process of the blocked isocyanate, an isocyanate monomer and a blocking agent are generally added into a reaction kettle to be reacted and synthesized to prepare the blocked isocyanate, and the prepared reaction product is conveyed into a storage tank from the reaction kettle. Because continuous production equipment suitable for closed isocyanate is not available, a plurality of reaction materials are partially excessive in the reaction process, the reaction rate is low, and the reaction is not thorough. After the reaction is finished, the product is easy to block in the conveying process, so that the conveying efficiency is low; the continuity of the production process of the closed isocyanate is poor, the production efficiency is low, and the full-flow production efficiency of the closed isocyanate is severely limited.
Through retrieval, a series of improvements are made on a reaction kettle in the prior art, but the improvement is limited to the reaction kettle, but the improvement of breakthrough is difficult to be made on the whole. The name of the invention is: a novel intelligent reaction kettle (patent number: 201420619971.X, application date: 2014.10.24)[7]The device comprises a reaction kettle body, a kettle cover, a stirrer and a steam circulating pipe, wherein a speed reducer is arranged at the top of the kettle cover; the lower part of the speed reducer is connected with a stirrer through a stirring shaft; a steam circulating pipe is arranged on the outer wall surface of the reaction kettle in a surrounding manner, the upper end and the lower end of the circulating pipe respectively extend to a section of pipe section outside the kettle, the pipe section at the upper part is provided with a steam circulating pipe inlet, the pipe section at the lower part is provided with a steam circulating pipe outlet, the circulating pipe section at the bottom of the reaction kettle is provided with a condensed water outlet, the steam circulating pipe outlet is provided with a pressure valve, and the upper surface of the reaction kettle is sequentially provided with two electromagnetic valves; and an electromagnetic valve III is fixed on the inlet pipe section of the steam circulating pipe. Although the intelligent control is realized on the reaction kettle, the production efficiency is improved; however, there is still no improvement in the overall flow of the production system, resulting in inefficient output of the reaction product and limiting the efficiency of the overall production process.
In addition, the invention is created as follows: an oxidation reaction device for synthesizing glyoxylic acid (patent number ZL201320240331.3, published Japanese 2013.10.09)[8]The device includes reation kettle, external cooler, material circulating pump, tail gas absorption tower and draught fan, reation kettle is equipped with air inlet, raw materials entry and heating jacket, reation kettle with external cooler passes through material circulating pump constitutes circulation circuit, reation kettle, tail gas absorption tower and draught fan pass through the pipeline and connect gradually. The patent application improves the yield and quality of the product, but the production efficiency in the reaction process is relatively low, and the problem needs to be solved.
Reference documents:
[1] suiyou, high Vial. isocyanate blocking light talk [ J ]. polyurethane industry, 2004, 17(4):10-13.
[2]Wicks Z W.Blocked isocyanates[J].Progress in Organic Coatings,1975,3(1):73-99.
[3]Wicks Z W.New developments in the field of blocked isocyanates[J].Progress in Organic Coatings,1981,9(1):3-28.
[4]Wicks D A,Wicks Z W.Blocked isocyanates III:Part A.Mechanisms and chemistry[J]. Progress in Organic Coatings,1999,36(3):148-172.
[5]Wicks D A,Wicks Z W.Blocked isocyanates III:Part B:Uses and applications of blocked isocyanates[J].Progress in Organic Coatings,4001,41(1):1-83.
[6] Long Hayao. イソシアネ - ト refers to adhesive [ J ]. journal of the color Material society (Japanese), 1980, 53(4):676.
[7] Shanghai Shihua Baochun machinery Limited company, a novel intelligent reaction kettle, China: ZL201420619971.X [ P ].2015-03-18.
[8] An oxidation reaction device for synthesizing glyoxylic acid, which is prepared by Hongyuan pharmaceutical company Limited in Hubei province, China: ZL201320240331.3[ P ] 2013-10-09
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention provides a production method and production equipment of closed isocyanate aiming at the problems of poor continuity and low efficiency of the production process of the closed isocyanate in the prior art,
according to the production method of the blocked isocyanate, the isocyanate monomer, the blocking agent and the solvent are added into the reaction kettle unit of the production equipment for heating and stirring reaction, and after the production of the blocked isocyanate is finished, the blocked isocyanate is directly conveyed into the storage tank of the storage unit through the discharging unit, so that the continuity and the production efficiency of the production process of the blocked isocyanate are improved;
the production equipment of the blocked isocyanate can improve the continuity of the reaction and output processes in the production process of the blocked isocyanate and improve the production efficiency.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a production method of closed isocyanate, which comprises the steps of adding an isocyanate monomer, a sealing agent and a solvent into a reaction kettle unit of production equipment for heating and stirring reaction, opening a circulating pump of a circulating unit, and feeding gaseous reactants and the solvent into a condensation container through a circulating air inlet pipe under the driving of the circulating pump to react to obtain the closed isocyanate; the blocked isocyanate is conveyed to a storage tank of the storage unit through the discharging unit.
Preferably, the specific steps are as follows:
(1) adding the raw materials
Adding an isocyanate monomer, a sealant and a solvent into an inner cavity of a reaction kettle main body of a reaction kettle unit, heating the reaction kettle main body, and heating to 80-100 ℃;
(2) synthesis reaction
Starting a stirring mechanism, and stirring materials in the reaction kettle main body with stirring blades under the driving of a motor rotating shaft to perform stirring reaction; opening a circulating pump of the circulating unit, spraying the circulating pump into the lower part of the inner cavity of the reaction kettle main body through a circulating nozzle under the driving of the circulating pump, uniformly mixing reactants adhered to the inner wall of the reaction kettle main body, and obtaining closed isocyanate after the reaction is finished;
(3) export blocked isocyanates
And opening the discharge port, allowing the sealed isocyanate to enter the discharge unit from the discharge port, and conveying the sealed isocyanate to a storage tank of the storage unit by a product conveying pipe under the driving of a discharge pump.
Preferably, the gaseous reactants and solvent enter the condensation vessel from the recycle gas inlet pipe under the drive of the recycle pump, and the gaseous reactants and solvent are condensed in the condensation vessel.
Preferably, the delivery reflux valve is opened during the output process, and the blocked isocyanate deposited in the product delivery pipe is delivered to the reflux outlet from the delivery reflux pipe through the reflux pump.
Preferably, the cavity backflow valve is opened in the output process, and the closed isocyanate deposited in the cavity of the pump body is conveyed to the backflow outlet through the cavity backflow pipe.
Preferably, the pump port return valve is opened in the output process, and the closed isocyanate deposited in the outlet of the discharging pump is conveyed to the return outlet through the pump port return pipe.
The invention relates to production equipment of closed isocyanate, which comprises a reaction kettle unit, a discharge unit and a storage unit, wherein the reaction kettle unit comprises a reaction kettle main body, the lower part of the reaction kettle main body is connected with the storage unit through the discharge unit, and the discharge unit comprises a discharge pump, a reflux pump and a product conveying pipe; the bottom of the reaction kettle main body is provided with a discharge port, the discharge port is connected with an inlet of a discharge pump, the discharge pump is connected with a storage unit through a product conveying pipe, a conveying return pipe is arranged on the product conveying pipe, and the conveying return pipe is connected with a return outlet through a return pump; the reflux outlet is arranged on the reaction kettle main body, the discharge pump is used for conveying a product in the reaction kettle main body to the storage unit, the storage unit comprises a storage tank, and a tank body heat-insulating layer is arranged outside the tank body of the storage tank.
Preferably, an inner cavity return pipe is arranged on an inner cavity of a pump body of the discharge pump and connected with the return pump.
Preferably, a pump port return pipe is arranged on one side of the product conveying pipe close to the discharge pump, and the pump port return pipe is connected with the return pump.
The invention relates to production equipment for preparing closed isocyanate, which comprises a reaction kettle unit, a circulation unit, a discharging unit and a storage unit, wherein the reaction kettle unit comprises a reaction kettle main body, the lower part of the reaction kettle main body is connected with the storage unit through the discharging unit, the discharging unit is provided with a discharging pump, and the discharging pump is used for conveying a product in the reaction kettle main body to the storage unit; the circulating unit comprises a circulating air inlet pipe, a circulating pump, a circulating nozzle and a gas conveying pipe, the circulating air inlet pipe is arranged at the upper part of the reaction kettle main body, the circulating air inlet pipe is connected with the top of the condensing container through the gas conveying pipe, and the bottom of the condensing container is connected with the circulating nozzle through the circulating pump; the circulating nozzle is arranged at the lower part in the reaction kettle main body, and the horizontal height of the circulating nozzle is lower than that of the bottom of the stirring blade.
The reaction kettle unit comprises a reaction kettle main body and a stirring mechanism, wherein a discharge hole is formed in the bottom of the reaction kettle main body, and the stirring mechanism is used for stirring reaction materials in an inner cavity of the reaction kettle main body.
The discharging unit comprises a discharging pump, a reflux pump and a product conveying pipe; the discharge port is connected with the inlet of a discharge pump, the discharge pump is connected with a storage unit through a product conveying pipe, a conveying backflow pipe is arranged on the product conveying pipe, and the conveying backflow pipe is connected with a backflow outlet through a backflow pump; the backflow outlet is arranged on the reaction kettle main body.
The inner cavity of the pump body of the discharge pump is provided with an inner cavity return pipe, and the inner cavity return pipe is connected with the return pump.
And a pump port return pipe is arranged on one side of the product conveying pipe close to the discharge pump and is connected with the return pump.
The circulating nozzle is obliquely and downwards arranged, the included angle between the circulating nozzle and the horizontal direction is a, and a is more than or equal to 30 degrees and less than or equal to 75 degrees.
The circulating unit further comprises an annular pipeline, the annular pipeline is arranged on the lower portion of the reaction kettle main body and connected with an outlet of the circulating pump, and the circulating nozzles are uniformly arranged on the circumference of the annular pipeline.
The horizontal part of the gas conveying pipe is provided with a shockproof corrugated pipe, and the vertical part of the gas conveying pipe is provided with a height-adjusting corrugated pipe.
Rabbling mechanism include agitator motor, motor shaft and stirring vane, agitator motor install in the top of reation kettle main part, the agitator motor lower part is provided with motor shaft, inside this motor shaft stretched into the reation kettle main part, stirring vane set up in motor shaft's bottom.
The reaction kettle unit further comprises a lighting lamp, a universal lamp holder is arranged on the upper portion of the reaction kettle main body, the lighting lamp is installed on the universal lamp holder, and the lighting lamp can rotate on the universal lamp holder.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) the production method of the closed isocyanate comprises the steps of adding an isocyanate monomer, a sealing agent and a solvent into a reaction kettle unit of production equipment, heating and stirring to react to generate the closed isocyanate, and directly conveying the closed isocyanate to a storage tank of a storage unit through a discharging unit after the production of the closed isocyanate is finished, so that the continuity and the production efficiency of the production process of the closed isocyanate are improved;
(2) according to the production equipment for the closed isocyanate, the reaction kettle unit, the storage unit and the discharging unit form the integrated production equipment, so that the reaction process, the storage process and the output process form a complete production process, the reaction efficiency of the reaction process and the output efficiency of the output process are improved, the continuity of the reaction and the output process in the production process is ensured, and the production efficiency is improved;
(3) the invention relates to production equipment for preparing closed isocyanate, wherein a circulating nozzle is arranged at the lower part in a reaction kettle main body; the outlet of the circulating pump is connected with the circulating nozzle, and reactant gas or solvent gas is condensed and then sprayed into the lower part of the inner cavity of the reaction kettle main body by the circulating pump and is introduced through the circulating nozzle, so that the stirring effect of reaction materials is improved, the uniform mixing of the materials is promoted, the local excess of the reaction is avoided, the contact area of the reaction is increased, and the reaction rate is improved;
(4) according to the production equipment for preparing the closed isocyanate, the delivery return pipe is arranged on one side of the product delivery pipe close to the storage unit, and the reaction product deposited in the product delivery pipe is delivered to the return outlet through the delivery return pipe by the return pump and is delivered to the inner cavity of the reaction kettle main body through the return outlet, so that the product in the output process is returned, the product is prevented from gathering at the connecting part of the product delivery pipe and the storage tank, and the delivery efficiency of the product is improved;
(5) according to the production equipment for preparing the closed isocyanate, after the reaction of the closed isocyanate is finished, the cooling effect of the condensation container is improved, the cooling speed of a reaction product can be improved by circulating reactants in the reaction kettle, so that the cooling efficiency is improved, and the closed isocyanate can be quickly discharged after being cooled, so that the reaction efficiency is improved;
(6) according to the production equipment for preparing the closed isocyanate, the transverse part of the gas conveying pipe is provided with the shockproof corrugated pipe, and the shockproof corrugated pipe can bear and absorb fluctuation displacement brought by light bodies, so that the gas conveying pipe is effectively prevented from being damaged due to gas fluctuation;
(7) according to the production equipment for preparing the closed isocyanate, the height-adjusting corrugated pipe is arranged at the vertical part of the gas conveying pipe, so that the tensile force or the compressive force applied to the condensation container is counteracted, the damage of the condensation container is effectively avoided, and the whole height of the circulating unit can be effectively ensured to be matched with the height of the reaction kettle main body;
(8) according to the production equipment for preparing the closed isocyanate, the stirring blade of the stirring mechanism is positioned in the reaction kettle main body and is used for stirring materials, the stirring motor drives the stirring blade to rotate through the motor rotating shaft and stir the reaction materials, so that the uniform mixing of the materials is promoted, the mass transfer process in the reaction process is accelerated, the reaction efficiency of the synthesis reaction is improved, the stirring blade is arc-shaped, the end part of the blade is bent upwards, the stirring blade is bent downwards, the contact area is increased by the arc-shaped stirring blade, the stirring effect is improved, the stirring effect of the reaction materials can be improved by accelerating the stirring through the circulating unit, and the uniform mixing of the materials is promoted;
(9) according to the production equipment for preparing the closed isocyanate, the inner cavity return pipe is arranged on the inner cavity of the pump body of the material pump and is connected with the reflux pump, and the reaction product deposited in the inner cavity of the pump body is conveyed to the reflux outlet through the inner cavity return pipe and enters the inner cavity of the main body of the reaction kettle, so that the reflux of the inner cavity of the pump body is realized, the deposition of the reaction product is avoided, and the output efficiency is improved.
Drawings
FIG. 1 is a schematic view showing the overall structure of a production apparatus for blocked isocyanate production according to the present invention;
FIG. 2 is a schematic view of a structure of a reactor unit and a circulation unit according to the present invention;
FIG. 3 is a schematic view showing the fitting of the annular duct and the circulation nozzle in embodiment 2;
FIG. 4 is a schematic view of a structure of a reaction vessel unit and a circulation unit in accordance with example 4;
FIG. 5 is a schematic view showing the fitting of the annular duct and the circulation nozzle in embodiment 5;
FIG. 6 is a schematic view showing the overall structure of examples 7 and 8.
The reference numerals in the schematic drawings illustrate:
100. a reaction kettle unit; 110. a reaction kettle main body; 111. a discharge port; 112. a universal lamp holder; 113. a glass lampshade; 114. Sealing the reaction kettle; 120. a stirring mechanism; 121. a stirring motor; 122. a motor shaft; 123. a stirring blade; 124. a seal ring; 125. a blade end; 126. a stirring hole; 130. an illuminating lamp; 131. a light handle;
200. a circulation unit; 210. circulating an air inlet pipe; 211. a shrink tube; 212. an air inlet end portion; 220. a condensing vessel; 221. a staying air chamber; 230. a condensate pipe; 231. a condensation water outlet pipe; 232. a condensation water inlet pipe; 240. a circulation pump; 241. a pump inlet; 242. an outlet of the pump; 250. a circulation nozzle; 260. a gas delivery pipe; 261. a shock-resistant bellows; 262. heightening the corrugated pipe; 270. An annular duct; 271. a pipe partition.
300. A discharging unit; 310. a discharge pump; 311. an inner cavity of the pump body; 312. an inner cavity return pipe; 313. an inner cavity reflux valve; 320. A reflux pump; 321. a return outlet; 330. a heat-insulating member; 331. a heat preservation liquid inlet; 332. a heat preservation liquid outlet; 333. a heat preservation liquid valve; 340. a product conveying pipe; 341. a pump port return conduit; 342. a delivery return pipe; 343. a pump port return valve; 344. a delivery return valve;
400. a storage unit; 410. a storage tank; 420. the tank body heat preservation layer.
Detailed Description
The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration exemplary embodiments in which the invention may be practiced. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the invention may be made without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to describe the features and characteristics of the invention, to set forth the best mode of carrying out the invention, and to sufficiently enable one skilled in the art to practice the invention. Accordingly, the scope of the invention is to be limited only by the following claims.
The detailed description and exemplary embodiments of the invention will be better understood when read in conjunction with the appended drawings, where the elements and features of the invention are identified by reference numerals.
Example 1
As shown in fig. 1 and fig. 2, a production apparatus for preparing a blocked isocyanate of the present embodiment includes a reaction kettle unit 100, a circulation unit 200, a discharge unit 300, and a storage unit 400; as shown in fig. 1, the reaction kettle unit 100 includes a reaction kettle main body 110, a lower portion of the reaction kettle main body 110 is connected to a storage unit 400 through a discharge unit 300, a discharge pump 310 is disposed on the discharge unit 300, and the discharge pump 310 is used for conveying a product in the reaction kettle main body 110 to the storage unit 400. The reaction process, the storage process and the output process form a complete production process, the continuity of the reaction step and the output step in the production process of the closed isocyanate can be improved, and the production efficiency is improved.
Wherein reaction kettle unit 100 includes reaction kettle main part 110 and rabbling mechanism 120, and reaction kettle main part 110 is inside to be provided with the inner chamber, and reaction kettle main part 110's bottom is provided with discharge gate 111, and discharge gate 111 is located the bottommost of inner chamber, and after the preparation of closed isocyanate was accomplished, the material was discharged by discharge gate 111. And the center of the discharge port 111 and the rotating axis of the stirring mechanism 120 are on the same straight line, the stirring mechanism 120 is rotated at a low speed in the discharging process, and the stirring mechanism is matched with the discharging unit 300 to prevent materials from being bonded, so that the discharging speed is increased.
The stirring mechanism 120 comprises a stirring motor 121, a motor rotating shaft 122 and stirring blades 123, wherein the stirring motor 121 is installed at the top of the reaction kettle main body 110, the motor rotating shaft 122 is arranged at the lower part of the stirring motor 121, a shaft hole of the motor rotating shaft 122 is formed in the reaction kettle main body 110, the motor rotating shaft 122 extends into the reaction kettle main body 110 through the shaft hole, a sealing ring 124 is arranged between the motor rotating shaft 122 and the shaft hole, and the sealing ring 124 is used for sealing the motor rotating shaft 122 and the shaft hole, so that air is prevented from entering the reaction kettle; the stirring blade 123 is disposed at the bottom of the motor shaft 122, the stirring blade 123 of the stirring mechanism 120 is located inside the reaction kettle main body 110, and the stirring blade 123 is used for stirring materials. The stirring motor 121 drives the stirring blades 123 to rotate through the motor rotating shaft 122, and the reaction materials are stirred, so that the materials are uniformly mixed, the mass transfer process of the reaction process is accelerated, and the reaction efficiency of the synthesis reaction is improved. The stirring blade 123 is arc-shaped, the end part 125 of the blade is bent upwards, the bottom of the stirring blade 123 is bent downwards, and the contact area of the arc-shaped stirring blade 123 is increased; and the stirring blade 123 is provided with the stirring hole 126, and reactants can flow through the stirring hole 126 in the stirring process, so that the stirring effect is improved, and the reaction efficiency is improved. In the discharging process, the bottom of the stirring blade 123 bends downwards, the center of the discharging port 111 and the rotating axis of the stirring mechanism 120 are on the same straight line, the stirring blade 123 rotates at a low speed, and the material forms a vortex center at the bottom of the stirring blade 123, so that the discharging speed of the material is accelerated.
In addition, after the reaction of the reaction closed isocyanate is finished, the cooling effect of the condensation container 220 is increased, and the cooling speed of a reaction product can be increased by searching for the circulation of reactants in the reaction kettle, so that the cooling efficiency is improved, and the cooled closed isocyanate can be rapidly discharged, so that the reaction efficiency is improved.
The circulation unit 200 of the present embodiment includes a circulation intake pipe 210, a condensation container 220, a condensation water pipe 230, a circulation pump 240, a circulation nozzle 250, and a gas delivery pipe 260; the circulating gas inlet pipe 210 is arranged at the upper part of the reaction kettle main body 110, gas phase in the reaction process can enter the circulating unit 200 through the circulating gas inlet pipe 210, a contraction pipe 211 is arranged on the circulating gas inlet pipe 210, the circulating gas inlet pipe 210 is connected with a gas conveying pipe 260 through the contraction pipe 211, and the contraction pipe 211 is used for preventing gas flow fluctuation and improving the stability of the gas flow. The circulation intake pipe 210 is connected to the top of the condensation container 220 through a gas delivery pipe 260, and a shock-proof bellows 261 is disposed on the gas delivery pipe 260, which is worth explaining: the transverse part of the gas conveying pipe 260 is provided with a shockproof corrugated pipe 261, and the gas conveying pipe 260 is difficult to be made into a whole due to the long conveying distance of the gas conveying pipe 260 and is often formed by connecting a plurality of pipelines, so that the observation effect in the circulating process is improved, the gas conveying pipe 260 is often made of glass materials, and the observation is convenient; however, when gas enters the gas delivery pipe 260 from the inner cavity of the reaction kettle main body 110, the gas often has great vibration at the joint of the pipes due to great fluctuation of the gas, if fastening connection is adopted, the pipes are easily damaged at the joint, and the shockproof corrugated pipe 261 can bear and absorb fluctuation displacement brought by light bodies; the gas delivery pipe 260 is effectively prevented from being damaged due to gas fluctuation.
In addition, since the overall height of the circulation unit 200 is adapted to the height of the reaction vessel body 110, but the height of the circulation unit 200 is inevitably greater than or less than the height of the reaction vessel body 110 during the installation process, the height of the circulation unit 200 is difficult to be adapted to the height of the reaction vessel body 110, and the circulation nozzle 250 is difficult to be effectively installed at a corresponding position of the lower part of the reaction vessel body 110; in addition, more importantly, although the gas fluctuation shockproof bellows 261 improves the shockproof effect at the joint of the gas delivery pipe 260 through flexible connection, and avoids the gas delivery pipe 260 from being damaged due to shock, a tensile force or a compressive force is inevitably applied to the condensation container 220 in the shock process, and the tensile force or the compressive force is constantly changed, so that the condensation container 220 is easily damaged; in the embodiment, the height-adjusting bellows 262 is arranged at the vertical part of the gas conveying pipe 260, so that the condensing container 220 is offset by tensile force or compressive force, the condensing container 220 is effectively prevented from being damaged, the overall height of the circulating unit 200 can be effectively ensured to be matched with the height of the reaction kettle main body 110, and the improvement is remarkable.
In addition, the top of the condensation container 220 is provided with a staying air chamber 221, the diameter of the staying air chamber 221 is between the diameters of the gas conveying pipe 260 and the condensation container 220, namely, the diameter of the staying air chamber 221 is larger than that of the gas conveying pipe 260, the diameter of the staying air chamber 221 is smaller than that of the condensation container 220, the staying air chamber 221 is made of an elastic material, certain gas can be stored in the staying air chamber 221, when the gas in the inner cavity of the reaction kettle main body 110 fluctuates, the gas fluctuation of the gas stored in the staying air chamber 221 can be reduced, the condensation container 220 caused by the gas fluctuation is reduced, and therefore the condensation container 220 is prevented from being damaged by the gas fluctuation.
The condensate pipe 230 of the embodiment is disposed inside the condensation container 220, the reactant gas or the solvent gas condenses in the condensation container 220 to become liquid, the condensate pipe 230 provides a cold source for condensation of the reactant gas or the solvent gas, the condensation water outlet pipe 231 is disposed on the upper portion of the condensation container 220, and the condensation water inlet pipe 232 is disposed on the lower portion of the condensation container 220.
The bottom of the condensing vessel 220 of the present embodiment is connected to a circulation nozzle 250 via a circulation pump 240; wherein the bottom of the condensing vessel 220 is connected to a pump inlet 241 of a circulation pump 240, and the circulation nozzle 250 is disposed at the lower portion in the reaction vessel main body 110; wherein pump outlet 242 of circulating pump 240 links to each other with circulation nozzle 250, and reactant gas or solvent gas condense back by circulating pump 240 to spout the lower part of the inner chamber of reation kettle main part 110 through circulation nozzle 250, improve the stirring effect of reaction material, promote the material misce bene, avoid the reaction local surplus, increased the area of contact of reaction, thereby improve reaction rate.
The horizontal height of the circulation nozzle 250 is lower than the horizontal height of the bottom of the stirring blade 123, the stirring blade 123 is arc-shaped, the end 125 of the blade is bent upwards to enhance the stirring effect of the upper material, and the circulation nozzle 250 is arranged at the lower part of the stirring blade 123 to enhance the stirring effect of the lower material; in addition, circulation nozzle 250 slope sets up downwards, and circulation nozzle 250 and horizontal direction's contained angle be a, 30 degrees is no less than a and is no less than 75, and the preferred 60 degrees of this embodiment, circulation nozzle 250 that the slope set up has strengthened circulation nozzle 250 to the impact of reation kettle main part 110 inner chamber bottom, stirring effect, promotes the inner chamber bottom material stirring, and impels the even reaction of material, improves reaction yield.
The discharging unit 300 of the present invention comprises a discharging pump 310, a reflux pump 320 and a product conveying pipe 340; the discharge port 111 is connected to an inlet of the discharge pump 310, an outlet of the discharge pump 310 is connected to the product delivery pipe 340, the discharge pump 310 is connected to the storage tank 410 of the storage unit 400 through the product delivery pipe 340, a delivery return pipe 342 is disposed on one side of the product delivery pipe 340 close to the storage unit 400, the delivery return pipe 342 is connected to the return outlet 321 through the return pump 320, and the return outlet 321 is disposed on the reaction kettle body 110. The reaction product deposited in the product conveying pipe 340 is conveyed to the return outlet 321 through the conveying return pipe 342 and the return pump 320, and is conveyed to the inner cavity of the reaction kettle main body 110 through the return outlet 321, so that the product in the output process flows back, the product is prevented from being accumulated at the connecting part of the product conveying pipe 340 and the storage tank 410, and the conveying efficiency of the product is improved.
In addition, a cavity return pipe 312 is arranged on the pump body cavity 311 of the discharge pump 310, and the cavity return pipe 312 is connected with the return pump 320. The reason is that in the production practice process, the viscosity of the closed isocyanate is relatively high, the adhesion and the deposition are easy to occur, the blockage is also easy to occur in the inner cavity 311 of the pump body of the discharge pump 310, and the output efficiency of the product is reduced; by adopting the scheme of the embodiment, the reaction product deposited in the inner cavity 311 of the pump body is conveyed to the backflow outlet 321 through the inner cavity backflow pipe 312 and enters the inner cavity of the reaction kettle main body 110, so that backflow of the inner cavity 311 of the pump body is realized, the deposition of the reaction product is avoided, and the output efficiency is improved.
It is worth further elucidating that: a pump port return pipe 341 is arranged on one side of the product conveying pipe 340 close to the discharge pump 310, the pump port return pipe 341 is connected with the return pump 320, and the reaction product deposited at the outlet of the discharge pump 310 is conveyed to the return outlet 321 through the pump port return pipe 341 and enters the inner cavity of the reaction kettle main body 110, so that the deposition of the reaction product at the outlet of the discharge pump 310 is avoided.
The storage unit 400 includes a storage tank 410, the storage tank 410 is used for storing reaction products, a tank insulating layer 420 is disposed outside a tank of the storage tank 410, and the tank insulating layer 420 is used for maintaining the temperature inside the storage tank 410, so that the products requiring heat insulation can be effectively insulated.
Example 2
As shown in fig. 3, the basic content of this embodiment is different from that of embodiment 1 in that: the circulation unit 200 further comprises an annular pipeline 270, the annular pipeline 270 is arranged at the lower portion of the reaction kettle main body 110, the annular pipeline 270 is connected with the pump outlet 242 of the circulation pump 240, the circulation nozzles 250 are uniformly arranged on the circumference of the annular pipeline 270, and the number of the circulation nozzles 250 is 4-8, so that the material mixing and stirring effects are improved, and the material in the inner cavity of the whole reaction kettle main body 110 is uniformly mixed.
Example 3
As shown in fig. 2, the basic content of this embodiment is different from that of embodiment 1 in that: the reaction kettle unit 100 further comprises an illuminating lamp 130, a universal lamp holder 112 is arranged on the upper portion of the reaction kettle main body 110, the illuminating lamp 130 is installed on the universal lamp holder 112, the illuminating lamp 130 can rotate on the universal lamp holder 112, a lamp handle 131 is arranged on the illuminating lamp 130, and the lamp handle 131 is used for adjusting the illuminating angle of the illuminating lamp 130.
Through rotating or rotating the lamp handle 131, the illuminating lamp 130 can be rotated on the universal lamp holder 112, so that the illuminating angle of the illuminating lamp 130 can be adjusted, and the operating personnel can effectively observe the reaction process of the reaction kettle main body 110.
Furthermore, it is worth mentioning that: be provided with glass lamp shade 113 on the light 130, glass lamp shade 113 is used for keeping apart light 130 and reation kettle main part 110 are inside, prevents on the one hand that gaseous entering reation kettle main part 110 is in to avoid air and reactant to take place the reaction, on the other hand can prevent that the erosion of reactant to light 130 from damaging.
Example 4
As shown in fig. 4, the basic contents of this embodiment are different from those of embodiment 1 in that: reation kettle main part 110 upper portion is provided with reation kettle closing cap 114, reation kettle closing cap 114 top is provided with the arc, the lower part of circulation intake pipe 210 is provided with inlet end portion 212, inlet end portion 212 set up to the arc, inlet end portion 212's arc cooperatees with reation kettle closing cap 114's arc, inlet end portion 212's arc parallels with reation kettle closing cap 114's arc, the air current can follow reation kettle closing cap 114 edge inflow inlet end portion 212 at reation kettle main part 110 top to enter circulation intake pipe 210, it is undulant to have avoided the air current to take place the air current in inlet end portion 212 position department, thereby the fluctuation of air current has been avoided, avoid circulation unit 200 to take place vibrations and damage.
Example 5
As shown in fig. 5, the basic content of this embodiment is different from that of embodiment 1 in that: the circulation unit 200 further comprises an annular pipe 270, the annular pipe 270, and the circulation nozzles 250 are uniformly arranged on the circumference of the annular pipe 270; this toroidal tube 270 sets up in the lower part of reation kettle main part 110, and be provided with pipeline baffle 271 in the toroidal tube 270, the import and the pump outlet 242 of pipeline baffle 271 link to each other, pipeline baffle 271 sets up between the import of circulation nozzle 250 and pipeline baffle 271, avoid the liquid after the condensation directly to flow into circulation nozzle 250 by pump outlet 242, promoted that the liquid after the condensation is even to be spouted into reation kettle main part 110 inner chamber by each circulation nozzle 250, thereby also promoted the steady inflow circulation intake pipe 210 of the air current at top.
Example 6
The basic contents of this embodiment are the same as embodiment 1, except that: the product conveying pipe 340 is externally wrapped with a heat preservation part 330, the heat preservation part 330 is used for preserving heat of the product conveying pipe 340, one side of the heat preservation part 330, which is close to the outlet of the discharging pump 310, is provided with a heat preservation liquid inlet 331, the other side of the heat preservation part 330 is provided with a heat preservation liquid outlet 332, the heat preservation liquid enters the heat preservation part 330 from the heat preservation liquid inlet 331 and flows out from the heat preservation liquid outlet 332, and the heat preservation liquid can maintain the temperature in the product output process. The heat preservation liquid may be water or heat conducting oil, and when the temperature of the heat preservation liquid is adjusted to be low, the heat preservation part 330 may also cool the product in the process of outputting the product.
Example 7
As shown in fig. 6, the basic contents of this embodiment are different from those of embodiment 1 in that: the inner cavity return pipe 312 is provided with an inner cavity return valve 313, the inner cavity return valve 313 is used for controlling the inner cavity return pipe 312, and when the deposition occurs in the inner cavity 311 of the pump body, the inner cavity return valve 313 can be opened again, so that the product in the inner cavity 311 of the pump body flows back, and the deposition is avoided.
The pump port reflux valve 343 is arranged on the pump port reflux pipe 341, the pump port reflux valve 343 is used for controlling the pump port reflux pipe 341, and when product deposition occurs at the pump port, the pump port reflux valve 343 is opened to enable the reactant to reflux, so that the product deposition at the pump port of the discharge pump 310 is avoided.
The delivery reflux valve 344 is arranged on the delivery reflux pipe 342, the delivery reflux valve 344 is used for controlling the delivery reflux pipe 342, and when product deposition occurs on the delivery reflux pipe 342, the delivery reflux valve 344 is opened to enable reactants to reflux, avoid deposition, and improve the output efficiency of the product.
Example 8
As shown in fig. 6, the basic contents of this embodiment are different from those of embodiment 6 in that: the heat preservation liquid inlet 331 is provided with a heat preservation liquid valve 333, and the heat preservation liquid valve 333 is used for controlling the opening or closing of the heat preservation liquid in the heat preservation part 330 and controlling the flow rate of the heat preservation liquid, thereby controlling the temperature in the output process of the product.
The invention relates to a production and output process of blocked isocyanate,
(1) adding the raw materials
Adding an isocyanate monomer, a sealant and a solvent into an inner cavity of a reaction kettle main body 110 of the reaction kettle unit 100, heating the reaction kettle main body 110, and heating to 80-100 ℃; the blocking agent is caprolactam and the solvent is toluene.
(2) Synthesis reaction
Starting the stirring mechanism 120, and stirring and reacting the materials in the reaction kettle main body 110 by the stirring blades 123 under the driving of the motor rotating shaft 122 for 1 hour;
opening a circulating pump 240 of the circulating unit 200, allowing gaseous reactants and solvent to enter the condensation container 220 through a circulating air inlet pipe 210 under the driving of the circulating pump 240, condensing the gaseous reactants and solvent in the condensation container 220, spraying the gaseous reactants and solvent into the lower part of the inner cavity of the reaction kettle main body 110 through a circulating nozzle 250 under the driving of the circulating pump 240, uniformly mixing the reactants adhered to the inner wall of the reaction kettle main body 110, and obtaining closed isocyanate after the reaction is finished;
(3) export blocked isocyanates
Opening the discharge port 111, feeding the sealed isocyanate into the discharge unit 300 through the discharge port 111, driving the sealed isocyanate by the discharge pump 310 to be conveyed into the storage tank 410 of the storage unit 400 through the product conveying pipe 340, and closing the discharge pump 310 after the sealed isocyanate is completely output; during the output process, the delivery reflux valve 344 is opened, and the blocked isocyanate deposited in the product delivery pipe 340 is delivered to the reflux outlet 321 through the reflux pump 320 by the delivery reflux pipe 342, so that the blocked isocyanate is prevented from being accumulated at the connection part of the product delivery pipe 340 and the storage tank 410; the cavity backflow valve 313 is opened, and the closed isocyanate deposited in the pump body cavity 311 is conveyed to the backflow outlet 321 through the cavity backflow pipe 312; the pump port return valve 343 is opened, and the blocked isocyanate deposited in the outlet of the discharge pump 310 is delivered from the pump port return pipe 341 to the return outlet 321.
The invention has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.
More specifically, although exemplary embodiments of the invention have been described herein, the invention is not limited to these embodiments, but includes any and all embodiments modified, omitted, combined (e.g., between various embodiments), adapted and/or substituted as would be recognized by those skilled in the art from the foregoing detailed description. The limitations in the claims are to be interpreted broadly based the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. For example, in the present invention, the term "preferably" is not exclusive, and it means "preferably, but not limited to" herein. Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the invention should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.
Claims (7)
1. A production method of closed isocyanate is characterized in that isocyanate monomer, a sealing agent and a solvent are added into a reaction kettle unit (100) of production equipment for heating and stirring reaction, a circulating pump (240) of a circulating unit (200) is started, and gaseous reactants and the solvent enter a condensation container (220) through a circulating air inlet pipe (210) under the drive of the circulating pump (240) to react to obtain the closed isocyanate; the blocked isocyanate is conveyed to a storage tank (410) of a storage unit (400) through a discharging unit (300);
opening the inner cavity backflow valve (313) in the output process, and conveying the closed isocyanate deposited in the inner cavity (311) of the pump body to the backflow outlet (321) through the inner cavity backflow pipe (312);
the production equipment comprises a reaction kettle unit (100), a circulation unit (200), a discharge unit (300) and a storage unit (400), wherein the reaction kettle unit (100) comprises a reaction kettle main body (110), the lower part of the reaction kettle main body (110) is connected with the storage unit (400) through the discharge unit (300),
the circulation unit 200 comprises a circulation air inlet pipe (210), a condensation container (220), a circulation pump (240), a circulation nozzle (250) and a gas delivery pipe (260); the circulating gas inlet pipe (210) is arranged at the upper part of the reaction kettle main body (110), the circulating gas inlet pipe (210) is connected with the top of the condensing container (220) through a gas conveying pipe (260), the bottom of the condensing container (220) is connected with a circulating nozzle (250) through a circulating pump (240), and the circulating nozzle (250) is arranged at the lower part in the reaction kettle main body (110);
the discharging unit (300) comprises a discharging pump (310), a reflux pump (320) and a product conveying pipe (340); the bottom of the reaction kettle main body (110) is provided with a discharge hole (111), the discharge hole (111) is connected with an inlet of a discharge pump (310), the discharge pump (310) is connected with a storage unit (400) through a product conveying pipe (340), the product conveying pipe (340) is provided with a conveying return pipe (342), and the conveying return pipe (342) is connected with a return outlet (321) through a return pump (320); the reflux outlet (321) is arranged on the reaction kettle main body (110), an inner cavity reflux pipe (312) is arranged on a pump body inner cavity (311) of the discharge pump (310), the inner cavity reflux pipe (312) is connected with the reflux pump (320), and an inner cavity reflux valve (313) is arranged on the inner cavity reflux pipe (312).
2. The method for producing the blocked isocyanate according to claim 1, comprising the following steps:
(1) adding the raw materials
Adding an isocyanate monomer, a sealant and a solvent into an inner cavity of a reaction kettle main body (110) of a reaction kettle unit (100), heating the reaction kettle main body (110), and heating to 80-100 ℃;
(2) synthesis reaction
Starting the stirring mechanism (120), and stirring materials in the reaction kettle main body (110) by the stirring blade (123) under the driving of the motor rotating shaft (122); opening a circulating pump (240) of the circulating unit (200), spraying the circulating pump (240) into the lower part of the inner cavity of the reaction kettle main body (110) through a circulating nozzle (250) under the driving of the circulating pump (240), uniformly mixing reactants adhered to the inner wall of the reaction kettle main body (110), and obtaining closed isocyanate after the reaction is finished;
(3) export blocked isocyanates
The discharge port (111) is opened, the blocked isocyanate enters the discharge unit (300) from the discharge port (111), and the blocked isocyanate is conveyed to the storage tank (410) of the storage unit (400) from the product conveying pipe (340) under the driving of the discharge pump (310).
3. A process for the production of a blocked isocyanate according to claim 1 or 2, wherein the gaseous reactants and solvent are introduced into the condensation vessel (220) from the recycle inlet line (210) under the drive of the recycle pump (240), and the gaseous reactants and solvent are condensed in the condensation vessel (220).
4. A method for the production of blocked isocyanates according to claim 1 or 2, characterized in that during the export the delivery return valve (344) is opened and the blocked isocyanates deposited in the product delivery line (340) are delivered from the delivery return line (342) via the return pump (320) to the return outlet (321).
5. The process for the production of blocked isocyanates according to claim 1 or 2, wherein the pump outlet return valve (343) is opened during the discharge and the blocked isocyanates deposited at the outlet of the discharge pump (310) are conveyed from the pump outlet return line (341) to the return outlet (321).
6. A production facility of closed isocyanate, characterized by: the device comprises a reaction kettle unit (100), a discharge unit (300) and a storage unit (400), wherein the reaction kettle unit (100) comprises a reaction kettle main body (110), the lower part of the reaction kettle main body (110) is connected with the storage unit (400) through the discharge unit (300), and the discharge unit (300) comprises a discharge pump (310), a reflux pump (320) and a product conveying pipe (340); the bottom of the reaction kettle main body (110) is provided with a discharge hole (111), the discharge hole (111) is connected with an inlet of a discharge pump (310), the discharge pump (310) is connected with a storage unit (400) through a product conveying pipe (340), the product conveying pipe (340) is provided with a conveying return pipe (342), and the conveying return pipe (342) is connected with a return outlet (321) through a return pump (320); the reflux outlet (321) is arranged on the reaction kettle main body (110), the discharge pump (310) is used for conveying products in the reaction kettle main body (110) to the storage unit (400), the storage unit (400) comprises a storage tank (410), and a tank body heat insulation layer (420) is arranged outside the tank body of the storage tank (410); an inner cavity return pipe (312) is arranged on a pump body inner cavity (311) of the discharge pump (310), and the inner cavity return pipe (312) is connected with the return pump (320).
7. The apparatus for producing a blocked isocyanate according to claim 6, wherein: and a pump port return pipe (341) is arranged on one side of the product conveying pipe (340) close to the discharge pump (310), and the pump port return pipe (341) is connected with the return pump (320).
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| CN201910342719.6A CN110102237B (en) | 2016-12-23 | 2016-12-23 | Production method and production equipment of closed isocyanate |
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| CN201611208521.1A CN106492731B (en) | 2016-12-23 | 2016-12-23 | A kind of production equipment being used to prepare blocked isocyanate |
| CN201910342719.6A CN110102237B (en) | 2016-12-23 | 2016-12-23 | Production method and production equipment of closed isocyanate |
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| CN201910342719.6A Active CN110102237B (en) | 2016-12-23 | 2016-12-23 | Production method and production equipment of closed isocyanate |
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| CN107018738A (en) * | 2017-06-05 | 2017-08-08 | 张季阳 | Decoction automatic stirring and plough integral type orchard fertilizer apparatus |
| CN107597056A (en) * | 2017-11-09 | 2018-01-19 | 曹恩康 | A kind of recycling reactor of exothermic reaction reaction heat |
| CN111302360B (en) * | 2020-04-20 | 2021-09-21 | 扬州天启新材料股份有限公司 | Cyanogen chloride preparation process for cyanate resin synthesis |
| GB2599890A (en) * | 2020-08-18 | 2022-04-20 | Ashe Robert | Improved loop reactor |
| CN115920805B (en) * | 2023-03-15 | 2023-05-12 | 山东广浦生物科技有限公司 | Preparation device and preparation process of glycidyl methacrylate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248922B1 (en) * | 1996-07-19 | 2001-06-19 | Met-Rx Usa Inc. | Process for manufacturing 3-hydroxy-3-Methylbutanoic acid |
| CN204193821U (en) * | 2014-09-25 | 2015-03-11 | 王丹旎 | A kind of constant speed constant temperature stirred tank |
| CN104857908A (en) * | 2015-04-28 | 2015-08-26 | 郭献培 | Water heating tank for curing agent |
| CN205056007U (en) * | 2015-09-24 | 2016-03-02 | 寇祥亮 | Toluene diisocyanate seals reaction unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4104805B2 (en) * | 2000-03-30 | 2008-06-18 | 三菱電機株式会社 | Heat pump water heater |
| JP2006097971A (en) * | 2004-09-29 | 2006-04-13 | Sharp Corp | Heat radiation system and stirling cooling storage |
| CN203227481U (en) * | 2013-05-07 | 2013-10-09 | 湖北省宏源药业有限公司 | Oxidation reaction device for synthesizing glyoxalic acid |
| CN204816546U (en) * | 2015-07-03 | 2015-12-02 | 浙江三和食品科技有限公司 | Hydrolysis reactor |
| CN206315791U (en) * | 2016-12-23 | 2017-07-11 | 马鞍山科英合成材料有限公司 | A kind of production equipment for being used to prepare blocked isocyanate |
-
2016
- 2016-12-23 CN CN201611208521.1A patent/CN106492731B/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248922B1 (en) * | 1996-07-19 | 2001-06-19 | Met-Rx Usa Inc. | Process for manufacturing 3-hydroxy-3-Methylbutanoic acid |
| CN204193821U (en) * | 2014-09-25 | 2015-03-11 | 王丹旎 | A kind of constant speed constant temperature stirred tank |
| CN104857908A (en) * | 2015-04-28 | 2015-08-26 | 郭献培 | Water heating tank for curing agent |
| CN205056007U (en) * | 2015-09-24 | 2016-03-02 | 寇祥亮 | Toluene diisocyanate seals reaction unit |
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| CN106492731A (en) | 2017-03-15 |
| CN106492731B (en) | 2019-03-26 |
| CN110102237A (en) | 2019-08-09 |
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