CN221287821U - Synthesis reactor, synthesis reactor apparatus and phosgene chamber - Google Patents

Abstract

The utility model discloses a synthesis reactor, synthesis reactor equipment and a phosgene chamber, which comprise a plurality of straight pipes and a plurality of bent pipes, wherein the straight pipes and the bent pipes are alternately connected to form a reaction channel, and a static mixer is arranged on the reaction channel. The synthesis reactor suitable for preparing the polycarbonate has the advantages that the reaction channels formed by closely arranging and alternately connecting the straight pipes and the bent pipes can effectively save space, so that the reactor can continuously produce in a limited space, and materials can be fully mixed through the static mixer and the combination of the specific straight pipes and the specific bent pipes in the production process, so that the reaction efficiency is improved.

Description

Synthesis reactor, synthesis reactor apparatus and phosgene chamber

Technical Field

The utility model relates to the technical field of synthesis reactors, in particular to a synthesis reactor, synthesis reactor equipment and a phosgene chamber.

Background

The Polycarbonate (PC) is a kind of polymer compound with the general formula of- [ -O-R-OCO- ] -chain links in a molecular chain, and is a general term of various materials prepared by taking the polymer compound as a matrix, and is engineering plastic with excellent performance. The method is widely applied to the fields of buildings, optical discs, sports equipment, automobiles, electronic equipment, computers and the like. The phosgene interfacial polycondensation method is one of the main production processes of industrial polycarbonate, and the polycarbonate produced by the process has the characteristics of less impurities, excellent performance and the like, and is a necessary process for producing high-end polycarbonate.

The oligomerization reaction is one of the synthesis reaction steps, which is one of the main reaction steps for synthesizing polycarbonate by a phosgene interfacial polycondensation method, and the main purpose is to mix materials such as phosgene, bisphenol A sodium salt, a blocking agent, a solvent, caustic soda and the like according to specific requirements and synthesize the low molecular weight polycarbonate. There are several different technological processes for producing polycarbonate by phosgene interface polycondensation in the current industry, and although the reaction principles of the various technological processes are similar, there are different differences in the implementation forms of oligomerization, some adopt kettle-type reactions, some adopt pipeline-type reactions, and some adopt kettle-type+pipeline-type composite reaction forms.

Since the oligomerization reaction involves the use of phosgene, a highly toxic chemical, special protection is required for equipment and facilities involved in the oligomerization reaction. It is common practice to install the equipment and facilities involved in the oligomerization reactor in the phosgene room, but this has the disadvantage of requiring construction of a large phosgene room, and relatively high occupation and investment.

Disclosure of utility model

The object of the present utility model is to provide a synthesis reactor, a synthesis reactor apparatus and a phosgene chamber which solve the above-mentioned disadvantages of the prior art.

In order to achieve the above object, the present utility model provides the following technical solutions:

A synthesis reactor suitable for preparing polycarbonate comprises a plurality of straight pipes and a plurality of bent pipes, wherein the straight pipes and the bent pipes are alternately connected to form a reaction channel, and a static mixer is arranged on the reaction channel.

The synthesis reactor suitable for preparing the polycarbonate is characterized in that two ends of the reaction channel are straight pipes.

The synthesis reactor suitable for preparing the polycarbonate is characterized in that the static mixer is arranged on a straight pipe.

The synthetic reactor suitable for preparing polycarbonate is characterized in that a charging pipe orifice communicated with the reaction channel is formed on the straight pipe.

In one of the above synthesis reactors suitable for polycarbonate production, the static mixer is located behind the feed nozzle in the flow direction of the reaction channel.

The synthesis reactor suitable for preparing the polycarbonate is characterized in that a plurality of groups of static mixers and charging pipe orifices are correspondingly arranged.

The synthesis reactor suitable for preparing the polycarbonate comprises a phosgene adding pipe orifice, a dihydric phenol sodium salt adding pipe orifice, a blocking agent adding pipe orifice and a caustic soda adding pipe orifice.

The synthesis reactor suitable for preparing the polycarbonate is characterized in that the bent pipe is a 180-degree bent pipe.

A synthesis reactor apparatus based on any of the synthesis reactors described above, comprising a containment vessel within which the synthesis reactor is enclosed.

A phosgene chamber comprising any one of the synthesis reactors described above.

In the technical scheme, the synthesis reactor equipment and the phosgene chamber provided by the utility model have the advantages that the reaction channels formed by closely arranging and alternately connecting the straight pipes and the bent pipes can effectively save space, so that the reactor can continuously produce in a limited space, and materials can be fully mixed through the static mixer and the combination of the specific straight pipes and the specific bent pipes in the production process, so that the reaction efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of the present utility model;

fig. 3 is a side view provided by an embodiment of the present utility model.

Reference numerals illustrate:

1. A straight pipe; 2. bending the pipe; 3. a static mixer; 4. adding solvent into the pipe orifice; 5. a material outlet; 6. phosgene is added into the pipe orifice; 7. adding dihydric phenol sodium salt into a pipe orifice; 8. adding a blocking agent into the pipe orifice; 9. caustic soda is added to the nozzle.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1-3, an embodiment of the present utility model provides a synthesis reactor suitable for polycarbonate preparation, which comprises a plurality of straight pipes 1 and a plurality of curved pipes 2, wherein the straight pipes 1 and the curved pipes 2 are alternately connected to form a reaction channel, and a static mixer 3 is arranged on the reaction channel.

Specifically, the pipeline synthesis reactor is a continuous reactor, is generally used for producing polymers or oligomers, and consists of a series of continuous reaction pipes, and the materials sequentially undergo a series of reaction steps in the pipeline to finally obtain the required products, which are not described in detail in the prior art. The innovation point of the embodiment of the utility model is that a plurality of straight pipes 1 and a plurality of bent pipes 2 are closely arranged and alternately connected to form a reaction channel (namely, two ends of one straight pipe 1 are connected with the bent pipes 2, two ends of one bent pipe 2 are connected with the straight pipes 1 alternately to form the reaction channel shown in figure 1), so that the reaction channel has a longer stroke in a certain space, and enough materials stay in a pipeline for a certain time (20S-600S) to react, and when the materials pass through the reaction channel, the materials can be fully mixed by a static mixer 3 (the static mixer 3 is a pipeline with the diameter smaller than or equal to the diameter of the straight pipe 1, and the pipeline is internally provided with special structures such as spiral sheets, corrugated sheets, grid sheets or grid strips, and the like, and the special structures can cause turbulence and form shearing force when fluid passes through so as to realize the effect of mixing the materials), so that the reaction efficiency of the materials and the product quality are improved.

According to the synthesis reactor suitable for preparing polycarbonate, the reaction channels formed by closely arranging and alternately connecting the straight pipes 1 and the bent pipes 2 can effectively save space, so that the reactor can continuously produce in a limited space, and materials can be fully mixed through the static mixer 3 and the combination of the specific straight pipes 1 and the specific bent pipes 2 in the production process, so that the reaction efficiency is improved.

In still another embodiment of the present utility model, further, two ends of the reaction channel are straight pipes 1. Specifically, the two ends of the reaction channel are respectively provided with the solvent adding pipe orifice 4 and the material outlet 5, so that materials can enter the reaction channel through the straight pipe 1 and can be discharged out of the reaction channel through the straight pipe 1, and the straight pipe 1 is conveniently connected with other pipelines, thereby facilitating continuous production of the materials.

Preferably, the static mixer 3 is arranged on the straight pipe 1. Specifically, the static mixer 3 is generally configured in a circular tube shape, and can be directly welded to the straight tube 1 (flange connection can also be used), so that connection is convenient, and a continuous reaction channel is formed.

Still further, a charging nozzle communicated with the reaction channel is formed on the straight pipe 1. Specifically, during the material reaction process, some auxiliary materials are required to be sequentially added according to specific requirements to synthesize the low molecular weight polycarbonate, and for this purpose, a charging pipeline is constructed on the straight pipe 1 to add the auxiliary materials during the material reaction process.

Still further, the static mixer 3 is located after the feed nozzle in the flow direction of the reaction channel. Specifically, the static mixer 3 is arranged in a matched manner with the feeding pipe orifice, and the static mixer 3 is arranged at the rear of the feeding pipe orifice, so that the feeding pipe orifice can directly mix the auxiliary materials in the reaction channel through the static mixer 3 after the auxiliary materials are added into the reaction channel, and the reaction efficiency of the materials is improved.

Preferably, the static mixer 3 and the feeding pipe opening are correspondingly provided with a plurality of groups. Specifically, a static mixer 3 and a charging pipe orifice are arranged in a group from front to back, a plurality of groups of static mixers 3 and charging pipe orifices are respectively arranged on the corresponding straight pipes 1 (one straight pipe 1 can be provided with one group or two groups), and one static mixer 3 is arranged behind one charging pipe orifice in the flowing direction of the reaction channel, so that materials are timely mixed in the process of sequentially adding auxiliary materials.

Still further, the charging nozzles include a phosgene charging nozzle 6, a dihydric phenol sodium salt charging nozzle 7, a capping agent charging nozzle 8 and a caustic soda charging nozzle 9. Specifically, the phosgene adding pipe orifice 6, the dihydric phenol sodium salt adding pipe orifice 7, the blocking agent adding pipe orifice 8 and the caustic soda adding pipe orifice 9 are respectively used for adding phosgene, dihydric phenol sodium salt, the blocking agent and caustic soda into the reaction channel, after a solvent enters the reaction channel through the solvent adding pipe orifice 4, the phosgene, dihydric phenol sodium salt, the blocking agent and caustic soda are sequentially added into the reaction channel through a plurality of feeding pipe orifices, and after one material is added, the material is mixed through the static mixer 3, so that the material is fully mixed and reacted in the reaction channel, and the low molecular weight polycarbonate is synthesized.

Preferably, the elbow 2 is a 180 ° elbow. Specifically, the diameters of the straight pipe 1 and the bent pipe 2 are the same, the diameters of the straight pipe 1 and the bent pipe 2 are determined by the treatment capacity of the synthesis reactor, so that the Reynolds number Re of a material in a pipeline is controlled to be 10000-4000000, the length of the straight pipe 1 is 10-50 times of the diameter of the straight pipe, and the diameter of the central line of the bent pipe 2 is 1-10 times of the diameter of the bent pipe.

It should be noted that, the straight pipe 1 with a specific length and the bent pipe 2 with 180 degrees can make the reaction materials undergo a certain degree of enhanced mixing in the bent pipe 2 after a specific residence time, so as to effectively improve the uniformity of the reaction and further reduce the dispersion degree of the product polycarbonate.

A synthesis reactor apparatus based on any of the synthesis reactors described above, comprising a containment vessel within which the synthesis reactor is enclosed. Specifically, the synthesis reactor of any one of the above is packaged in a containment, so that the occupied space is effectively reduced and the safety of synthesis reactor equipment is improved.

A phosgene chamber comprising any one of the synthesis reactors described above. Specifically, the synthesis reactor of any one of the above is arranged in the phosgene chamber, so that the safety and the easy maintenance are realized, the volume is small, and the design of an oversized phosgene chamber is not caused.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (9)

1. The synthesis reactor suitable for preparing the polycarbonate comprises a plurality of straight pipes and a plurality of bent pipes, and is characterized in that the straight pipes and the bent pipes are alternately connected to form a reaction channel, a static mixer is arranged on the reaction channel, and a charging pipe orifice communicated with the reaction channel is formed in the straight pipes.

2. The synthesis reactor according to claim 1, wherein the reaction channel is straight at both ends.

3. The synthesis reactor according to claim 1, wherein the static mixer is arranged on a straight pipe.

4. The synthesis reactor according to claim 1, wherein the static mixer is located after the feed nozzle in the flow direction of the reaction channel.

5. The synthesis reactor according to claim 1, wherein the static mixer and the feed nozzle are provided with a plurality of groups.

6. The synthesis reactor according to claim 5, wherein the feed nozzles comprise a phosgene addition nozzle, a dihydric phenol sodium salt addition nozzle, a capping agent addition nozzle, and a caustic soda addition nozzle.

7. The synthesis reactor of claim 1, wherein the elbow is a 180 ° elbow.

8. A synthesis reactor apparatus based on the synthesis reactor according to any of claims 1-7, comprising a containment vessel within which the synthesis reactor is enclosed.

9. A phosgene chamber, characterized in that it comprises a synthesis reactor according to any one of claims 1 to 7.