A purification system and method for producing mixed polyether polyols

Abstract

The application discloses a kind of preparation of mixed polyether polyol refining system and preparation method, including substrate, the surface of substrate is provided with feeding mechanism, for the feeding and processing of reactant raw material, the surface of substrate is provided with polymerization mechanism, for ring-opening polymerization of polymer, the surface of substrate is provided with processing mechanism, processing mechanism includes neutralization tank, neutralization tank is installed on the surface of substrate, the present application relates to chemical equipment technical field.The preparation of mixed polyether polyol refining system and preparation method, by first placing material in feeding tank, feeding tank contains standard scale feeder, material is first placed in feeder, then together into mixing, one end of conveying pipe extends backward, into subsequent process, in addition to requiring polymerization monomer to have higher purity, polymerization monomer must also have high purity, ensure the reaction speed of polyether polyol synthesis, ensure its molecular weight control and product color unsaturation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chemical equipment, in particular to a refining system for preparing mixed polyether polyol and a preparation method. BACKGROUND

[0002] The mixed polyether polyol is a high-polymer and is mainly used as a raw material for manufacturing detergents, wetting agents and antistatic agents.

[0003] Referring to Chinese Patent CN104011108B (Post-treatment method of reaction mixture containing polyether polyol), the above patent proposes a solution to the problem of long crystallization time of salt crystallization in the prior art, and the effect of removing the catalyst is achieved by using a new alkali-containing substance and a catalyst of cristobalite, and the precipitation of salt is avoided.

[0004] The above patent uses a new reactant to avoid the slow problem of salt precipitation, but in the prior art, a plurality of chambers and ion membranes are used for catalyst filtration, a plurality of electrical devices are used, diffusion is carried out in a fixed area, and an alkaline compound is used for reaction to remove the catalyst, so that the process is complex, and therefore the application provides a refining system for preparing mixed polyether polyol and a preparation method. SUMMARY

[0005] In view of the deficiencies of the prior art, the application provides a refining system for preparing mixed polyether polyol and a preparation method, which solves the problem of complex process of removing the catalyst in the prior art.

[0006] To achieve the above object, the application is implemented by the following technical scheme: a refining system for preparing mixed polyether polyol, comprising a base plate, a feeding mechanism is arranged on the surface of the base plate and used for feeding and processing of reactant raw materials, a polymerization mechanism is arranged on the surface of the base plate and used for ring-opening polymerization of polymers, a treatment mechanism is arranged on the surface of the base plate, the treatment mechanism comprises a neutralization tank, the neutralization tank is installed on the surface of the base plate, an adsorption assembly is arranged on the surface of the base plate, an exchange assembly is arranged on the surface of the base plate, a filter assembly is arranged on the surface of the base plate, a rectification assembly is arranged on the surface of the base plate, a heating ring is arranged in the neutralization tank, a gas cylinder is fixed to the surface of the neutralization tank, a baffle is slidably connected to the surface of the neutralization tank, the gas cylinder and the baffle are fixedly connected through a gas rod, and a stirring wheel is rotatably connected to the inside of the neutralization tank.

[0007] Preferably, the adsorption assembly comprises an adsorption net and a cleaning brush, the adsorption net is slidably connected in the extension pipe of the neutralization tank, and the cleaning brush is slidably connected to the surface of the adsorption net.

[0008] Preferably, the exchange assembly comprises an ion net fixed in the pipeline and a precipitation plate fixed at the bottom of the pipeline.

[0009] Preferably, the filter assembly comprises a filter net and a mixing pipe, the mixing pipe is fixed at the top of the pipeline, and the filter net is fixed on the surface of the inner wall of the pipeline.

[0010] Preferably, the rectification assembly comprises an evaporator installed on the surface of the reaction tank and an evaporation pipe arranged above the evaporator.

[0011] Preferably, the feeding mechanism comprises a feeding tank fixed on the surface of the base plate and a conveying pipe having one end connected with the feeding tank.

[0012] Preferably, the polymerization mechanism comprises a vacuum pipe in communication with the conveying pipe and a pump machine installed inside the vacuum pipe.

[0013] The application further discloses a preparation method of the preparation system of the mixed polyether polyol.

[0014] S1, raw material pretreatment: first, the material is placed in the feeding tank, the feeding tank contains a standard scale feeder, the material is first placed in the feeder, and then the material is fed together, one end of the conveying pipe extends backward into the subsequent process.

[0015] S2, ring-opening polymerization: the material enters the vacuum pipe through the pipeline, first, the vacuum environment inside the vacuum pipe is ensured, a large amount of nitrogen is input into the vacuum pipe to remove the internal oxygen, then the material mixing reaction is carried out to realize the ring-opening polymerization reaction, dry nitrogen is continuously input to ensure that the reaction is carried out in an oxygen-free environment, and the product purity is improved.

[0016] S3, subsequent treatment: first, the catalyst is removed by acid neutralization treatment, inorganic phosphoric acid is fed into the neutralization tank, salt crystals are precipitated through the neutralization reaction, in order to accelerate the precipitation of salt crystals, a cylinder is used to control the baffle to block the subsequent pipeline communication, a heating ring is started to heat the solution, then the baffle is controlled to rise, then the stirring wheel is controlled to stir to increase the reaction speed, and the solution after full heating reaction is cooled by controlling the baffle to rise and fall, the precipitation is removed by the adsorption net and the cleaning brush, the removal of the catalyst is completed, and the preparation is realized through the subsequent steps.

[0017] Advantages

[0018] The application provides a preparation system and a preparation method of a mixed polyether polyol.

[0019] (1), the preparation of mixed polyether polyol refining system and preparation method, by first putting the material in the feed tank, feed tank contains standard scale feeder, the material is first put into the feeder, and then mixed together, the end of the transport pipe extends backward, into the subsequent process, in addition to the requirement that the polymerization monomer has high purity, the polymerization monomer must have high purity, ensure the reaction speed of polyether polyol synthesis, ensure the control of its molecular weight and product color unsaturation.

[0020] (2), the preparation of mixed polyether polyol refining system and preparation method, by oxygen will have oxidation inhibition effect on polymerization, therefore, before the reaction, nitrogen is sent to the polymerization reaction device for displacement, to ensure that the reaction is carried out under oxygen free condition, at the same time, dry nitrogen is continuously introduced during the reaction, to obtain high quality polyether polyol.

[0021] (3), the preparation of mixed polyether polyol refining system and preparation method, by filtering out the impurities of residual catalyst, and also using adsorption, dehydration, distillation and other steps, so that the polyether product with low water content, light color, no odor and uniform performance is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the structural diagram of the present application;

[0023] Figure 2 is the structural diagram of the processing mechanism of the present application;

[0024] Figure 3 is the structural diagram of the heating ring of the present application;

[0025] Figure 4 is the structural diagram of the exchange assembly of the present application;

[0026] Figure 5 is the structural diagram of the stirring wheel of the present application.

[0027] In the figure: 1 - base plate, 2 - feeding mechanism, 21 - feeding tank, 22 - transport pipe, 3 - polymerization mechanism, 31 - vacuum pipe, 32 - pump, 4 - processing mechanism, 41 - neutralization tank, 42 - heating ring, 43 - air cylinder, 44 - baffle, 45 - stirring wheel, 5 - adsorption assembly, 51 - adsorption net, 52 - cleaning brush, 6 - exchange assembly, 61 - ion net, 62 - sedimentation plate, 7 - filtration assembly, 71 - filter net, 72 - mixing pipe, 8 - rectification assembly, 81 - evaporator, 82 - evaporation pipe. DETAILED DESCRIPTION

[0028] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] Please refer to Figures 1-5 The present application provides three technical solutions:

[0030] Embodiment one

[0031] A kind of preparation mixed polyether polyol refining system, including base plate 1, the surface of base plate 1 is provided with feeding mechanism 2, for the feeding and processing of reactant raw material, the surface of base plate 1 is provided with polymerization mechanism 3, for ring-opening polymerization of polymer, the surface of base plate 1 is provided with processing mechanism 4, processing mechanism 4 includes neutralization tank 41, neutralization tank 41 is installed on the surface of base plate 1, the surface of base plate 1 is provided with adsorption component 5, the surface of base plate 1 is provided with exchange component 6, the surface of base plate 1 is provided with filter component 7, the surface of base plate 1 is provided with rectification component 8, the inside of neutralization tank 41 is provided with heating ring 42, heating ring 42 can be heated with external electrical connection, the surface of neutralization tank 41 is fixed with air cylinder 43, the surface of neutralization tank 41 is slidably connected with baffle 44, baffle 44 is slid in the sealing groove opened in the surface of neutralization tank 41, air cylinder 43 is fixedly connected with baffle 44 by air rod, the inside of neutralization tank 41 is rotatably connected with stirring wheel 45, stirring wheel 45 is drivingly connected with motor installed on the surface of neutralization tank 41 by bevel gear set.

[0032] Embodiment two

[0033] A purification system for preparing mixed polyether polyols includes a substrate 1. A feeding mechanism 2 is disposed on the surface of the substrate 1 for feeding and processing reactant raw materials. A polymerization mechanism 3 is disposed on the surface of the substrate 1 for ring-opening polymerization of the polymer. A processing mechanism 4 is disposed on the surface of the substrate 1, including a neutralization tank 41 mounted on the surface of the substrate 1. An adsorption assembly 5 is disposed on the surface of the substrate 1, including an adsorption mesh 51 and a cleaning brush 52. The adsorption mesh 51 is slidably connected to an extension tube of the neutralization tank 41, and the cleaning brush 52 is slidably connected to the surface of the adsorption mesh 51. An exchange assembly 6 is disposed on the surface of the substrate 1, including an ion exchange mesh 61 and a precipitation plate 62. The exchange assembly 6 is disposed in a subsequent pipe of the adsorption assembly 5, with the ion exchange mesh 61 fixed in the pipe and the precipitation plate 62 fixed at the bottom of the pipe. A filter assembly 7 is disposed on the surface of the substrate 1. 7 includes a filter screen 71 and a mixing tube 72. The mixing tube 72 is fixed to the top of the pipe, and the filter screen 71 is fixed to the surface of the inner wall of the pipe. A distillation assembly 8 is provided on the surface of the substrate 1. The distillation assembly 8 includes an evaporator 81 and an evaporation tube 82. The evaporation tube 82 is connected to an external collection device. A reaction tank is provided at the end of the extension tube. The evaporator 81 is installed on the surface of the reaction tank, and the evaporation tube 82 is located above the evaporator 81. A heating ring 42 is provided inside the neutralization tank 41. The heating ring 42 is electrically connected to the outside and can be heated. A cylinder 43 is fixed on the surface of the neutralization tank 41. A baffle 44 is slidably connected to the surface of the neutralization tank 41. The baffle 44 slides in a sealing groove opened on the surface of the neutralization tank 41. The cylinder 43 and the baffle 44 are fixedly connected by a rod. A stirring wheel 45 is rotatably connected inside the neutralization tank 41. The stirring wheel 45 is driven by a motor installed on the surface of the neutralization tank 41 through a bevel gear set.

[0034] Example 3

[0035] The utility model provides a kind of preparation mixed polyether polyol refining system, including base plate 1, the surface of base plate 1 is provided with feeding mechanism 2, for the feeding and processing of reactant raw material, feeding mechanism 2 includes feeding tank 21 and transport pipe 22, by first placing material in feeding tank 21, feeding tank 21 contains standard scale feeder, material is first placed in feeder, then together is put into mixing, one end of transport pipe 22 extends backward, into subsequent process, in addition to requiring that polymerization monomer has higher purity, polymerization monomer must also have high purity, ensure the reaction speed of polyether polyol synthesis, ensure its molecular weight control and product color unsaturation, oxygen can have oxidation inhibition effect on polymerization reaction, so nitrogen is sent to polymerization reaction device before reaction, and replacement is carried out, ensure that reaction is carried out under oxygen-free condition, while, dry nitrogen is inhaled uninterruptedly during reaction, to prepare high-quality polyether polyol, feeding tank 21 contains standard scale feeder, material is first placed in feeder, then together is put into mixing, one end of transport pipe 22 extends backward, feeding tank 21 is fixed on the surface of base plate 1, one end of transport pipe 22 is connected with feeding tank 21, the surface of base plate 1 is provided with polymerization mechanism 3, polymerization mechanism 3 includes vacuum pipe 31 and pump 32, vacuum pipe 31 can be self-closed, pump 32 is electrically connected with external motor, vacuum pipe 31 is communicated with transport pipe 22, pump 32 is installed in vacuum pipe 31, for ring-opening polymerization of polymer, the surface of base plate 1 is provided with processing mechanism 4, processing mechanism 4 includes neutralization tank 41, neutralization tank 41 is installed on the surface of base plate 1, the surface of base plate 1 is provided with adsorption assembly 5, adsorption assembly 5 includes adsorption net 51 and cleaning brush 52, adsorption net 51 is slidably connected in the extension pipe of neutralization tank 41, cleaning brush 52 is slidably connected on the surface of adsorption net 51, the surface of base plate 1 is provided with exchange assembly 6, exchange assembly 6 includes ion net 61 and precipitation plate 62, exchange assembly 6 facilities in subsequent pipeline of adsorption assembly 5, filters out the impurities of residual catalyst, and also uses adsorption, dehydration, distillation etc.The inside of the neutralization tank 41 is rotatably connected with a stirring wheel 45, which is in transmission connection with the motor installed on the surface of the neutralization tank 41 through a bevel gear set.

[0036] The application further discloses a preparation method of the preparation system.

[0037] S1, raw material pretreatment: firstly, the material is placed in the feeding box 21, the feeding box 21 is provided with a standard scale feeder, the material is firstly placed in the feeder, and then is fed into mixing together, one end of the conveying pipe 22 extends backward into a subsequent process.

[0038] S2, ring-opening polymerization: the material is conveyed into the vacuum pipe 31 through a pipeline, firstly, a vacuum environment is ensured in the vacuum pipe 31, a large amount of nitrogen is input into the vacuum pipe 31 to remove internal oxygen, then material mixing reaction is carried out to realize ring-opening polymerization reaction, dry nitrogen is continuously input to ensure that the reaction is carried out in an oxygen-free environment, and the product purity is improved.

[0039] S3, subsequent treatment: firstly, acid neutralization treatment is carried out to remove the catalyst, inorganic phosphoric acid is fed into the neutralization tank 41, salt crystals are precipitated through neutralization reaction, in order to accelerate the precipitation of the salt crystals, the cylinder 43 is used to control the baffle 44 to block the subsequent pipeline, the heating ring 42 is started to heat the solution, then the baffle 44 is controlled to rise, then the stirring wheel 45 is controlled to stir to increase the reaction speed, and the solution after full heating reaction is cooled by controlling the baffle 44 to rise and fall, the precipitation of the salt crystals is accelerated, finally, the adsorption net 51 and the cleaning brush 52 are used to remove the precipitation, the removal of the catalyst is completed, and the preparation is realized through subsequent steps.

[0040] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0041] It should be noted that, in the present document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0042] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A purification system for the production of mixed polyether polyols, comprising a base plate (1), characterized in that: The surface of the substrate (1) is provided with a feeding mechanism (2) for feeding and processing of reactant raw materials, the feeding mechanism (2) comprising a feeding tank (21) fixed on the surface of the substrate (1) and a conveying pipe (22) with one end connected with the feeding tank (21); the surface of the substrate (1) is provided with a polymerization mechanism (3) for ring-opening polymerization of polymers, the polymerization mechanism (3) comprising a vacuum pipe (31) in communication with the conveying pipe (22) and a pump (32) installed inside the vacuum pipe (31); The surface of the substrate (1) is provided with a processing mechanism (4) comprising a neutralization tank (41) installed on the surface of the substrate (1), the surface of the substrate (1) is provided with an adsorption assembly (5), the surface of the substrate (1) is provided with an exchange assembly (6), the surface of the substrate (1) is provided with a filtering assembly (7), the surface of the substrate (1) is provided with a rectification assembly (8), the inside of the neutralization tank (41) is provided with a heating ring (42) for heating the solution, the surface of the neutralization tank (41) is fixed with an air cylinder (43), the surface of the neutralization tank (41) is slidingly connected with a baffle (44), the air cylinder (43) is fixedly connected with the baffle (44) through an air rod, the baffle (44) is controlled to rise and fall by the air cylinder (43) to open and close the subsequent pipeline, the inside of the neutralization tank (41) is rotatably connected with a stirring wheel (45) for stirring the solution to increase the reaction speed; The exchange assembly (6) comprises an ion net (61) fixed in the pipeline and a precipitation plate (62) fixed at the bottom of the pipeline.

2. A purification system for producing mixed polyether polyols according to claim 1, characterized in that: The adsorption assembly (5) comprises an adsorption net (51) slidingly connected in the extension pipe of the neutralization tank (41) and a cleaning brush (52) slidingly connected on the surface of the adsorption net (51).

3. A purification system for producing mixed polyether polyols according to claim 2, characterized in that: The filtering assembly (7) comprises a filtering net (71) and a mixing pipe (72), the mixing pipe (72) is fixed at the top of the pipeline, and the filtering net (71) is fixed on the surface of the inner wall of the pipeline.

4. A purification system for producing mixed polyether polyols according to claim 3, characterized in that: The rectification assembly (8) comprises an evaporator (81) and an evaporation pipe (82), the end of the extension pipe is provided with a reaction tank, the evaporator (81) is installed on the surface of the reaction tank, and the evaporation pipe (82) is arranged above the evaporator (81).

5. A method of producing a mixed polyether polyol, using the mixed polyether polyol refining system of claim 4, characterized by: Specifically comprising the following steps: S1, raw material pretreatment: first, the material is placed in the feeding tank (21), the feeding tank (21) contains a standard scale feeder, the material is first placed in the feeder, and then mixed together, one end of the conveying pipe (22) extends backward into the subsequent process; S2, ring-opening polymerization: the material enters the vacuum tube (31) through the pipeline, first ensure the vacuum environment inside the vacuum tube (31), while inputting a large amount of nitrogen into the vacuum tube (31) and filling the internal oxygen, then carrying out material mixing reaction to realize ring-opening polymerization reaction, in this process, dry nitrogen is continuously input to ensure that the reaction is carried out in an oxygen-free environment, improve product purity; S3, subsequent treatment: first, acid neutralization treatment is carried out to remove the catalyst, by putting inorganic phosphoric acid into the neutralization tank (41), salt crystallization is precipitated through neutralization reaction, in order to accelerate the precipitation of salt crystallization, the air cylinder (43) is used to control the baffle (44) to block the subsequent pipeline communication, the heating ring (42) is started to heat the solution, then the baffle (44) is controlled to rise, then the stirring wheel (45) is controlled to stir to increase the reaction speed, and the solution after sufficient heating reaction is cooled down with the baffle (44) rising and falling, to accelerate the precipitation of crystalline salt, finally, the adsorption net (51) and the cleaning brush (52) are used to remove the precipitate, to complete the removal of catalyst.

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