Novel reaction kettle for rearranging organic silicon high-boiling residues

Abstract

The utility model provides a novel reaction kettle for rearranging organic silicon high-boiling residues, which comprises a jacket, a kettle body and a stirring device, the jacket is sleeved on the outer side of the kettle body, and the stirring device is fixedly arranged on the inner side of the kettle body; the stirring device is provided with three layers of stirring blades, namely a downward turning blade, a mixed flow blade and a self-suction blade in sequence from top to bottom, and a baffle for controlling pressure and reaction temperature is arranged on the inner wall of the kettle body at the position corresponding to the blades. The reaction kettle disclosed by the utility model has the beneficial effect of ensuring that materials form a uniform and consistent mixing system in the reaction kettle. According to the stirring device, the stirring speed can be adjusted according to the characteristics and reaction requirements of organic silicon high-boiling residues, the uniformity and high efficiency of reaction are ensured through the optimal mixing effect, and in addition, a baffle is arranged on the inner wall of the reaction kettle, so that the safety in the production process is further improved.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a novel reaction kettle used for rearrangement of high-boiling substances of organic silicon. Background Art

[0002] Organic silicon high boiling products refer to the by-products in the production process of organic silicon monomers, a dark brown mixed liquid with a strong pungent odor and corrosiveness. It contains a small amount of solid matter and insoluble Cu, Al, Zn; it also contains a small amount of very fine silicon powder, and its density is 1.13g / cm3 at room temperature and pressure. High boiling products contain a variety of compounds, and their boiling range is between 80℃ and 215℃. It is a general term for high-boiling silane mixtures whose main components are Si-Si bonds, Si-C-Si bonds, and Si-O-Si bonds.

[0003] High-boiling products cannot be effectively made into chlorosilane monomers or polysiloxanes with high economic benefits, and long-term storage is dangerous and causes serious corrosion to containers. Therefore, domestic and foreign silicone companies have paid great attention to the comprehensive utilization of by-product high-boiling products since the production of chlorosilane monomers, but in general, the efficiency of their comprehensive utilization is low and it is difficult to achieve effective utilization. How to more effectively and thoroughly utilize and treat these high-boiling products directly affects the economic benefits of the company and is also a more urgent problem faced by domestic and foreign silicone factories.

[0004] At present, the high-boiling-material treatment process commonly used in China mostly adopts the catalyst cracking process. This process often uses a high-temperature and high-pressure reactor as the reaction vessel. However, due to the adverse effects of various factors such as the reactor design, stirring, and feeding method on the rearrangement reaction, the high-boiling-material conversion rate is low. High-boiling materials cannot be effectively converted into chlorosilane monomers with certain value. Moreover, after inefficient cracking, there are still a large number of Si-C-Si, Si-Si and other substances that have not been cracked and have a high boiling point, which will also generate a large load on the subsequent distillation device.

[0005] In view of the above situation, it is very important to design and manufacture a new reactor suitable for the continuous rearrangement reaction of high-boiling substances in organosilicon. Utility Model Content

[0006] Aiming at the shortcomings of the existing technology, the problem of low conversion rate of high-boiling substances is solved; the materials are fully mixed and stirred evenly, the mass transfer and heat transfer efficiency is high, the operation is stable, and the organic silicon high-boiling substance rearrangement reactor with a long continuous production cycle is developed. Thus, the effective and resourceful utilization of high-boiling substances produced as by-products of organic silicon is realized.

[0007] The utility model provides a novel reaction kettle for rearrangement of high-boiling organic silicon, comprising a jacket, a kettle body and a stirring device, wherein the jacket is arranged on the outside of the kettle body, and the stirring device is fixedly arranged on the inside of the kettle body;

[0008] The stirring device is provided with three layers of stirring blades, which are downward turning blades, mixed flow blades and self-priming blades from top to bottom. Baffles for controlling pressure and reaction temperature are provided on the inner wall of the kettle body at the positions corresponding to the blades.

[0009] Furthermore, the stirring device includes a motor and a magnetic transmission device. The motor is arranged at the upper end of the magnetic transmission device to provide power for the magnetic transmission device. The magnetic transmission device enters the kettle body from the upper end of the kettle body to drive the downward-turning blades, mixed-flow blades and self-priming blades for stirring.

[0010] As a preferred solution, the spacing between the downward-turned blade and the mixed-flow blade is 200-400 mm, the spacing between the mixed-flow blade and the self-priming blade is 200-400 mm, and the width of the baffle is 100-200 mm.

[0011] Furthermore, the kettle body is provided with a gas phase feed port, and the gas phase feed port is provided with a gas distributor for evenly distributing the cracking gas in the kettle body.

[0012] Furthermore, the top and bottom of the kettle body are both provided with a feed inlet and a discharge outlet.

[0013] As a preferred solution, the feed inlet and the discharge outlet at the bottom of the kettle body are provided with inclined surfaces, and the inclination angle is 30-60 degrees.

[0014] As a preferred solution, the feed port and the discharge port are provided with pressure and temperature monitoring devices.

[0015] Furthermore, the jacket is provided with a heat transfer oil inlet and a heat transfer oil outlet.

[0016] Furthermore, ear seats are provided on the side surfaces of the jacket.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model is equipped with a mixing and stirring device composed of downward-turning blades, mixed-flow blades and self-priming blades, which can ensure that the materials form a uniform and consistent mixing system inside the reactor. This stirring device can adjust the stirring speed according to the characteristics and reaction requirements of the high-boiling organic silicon product, and ensure the uniformity and efficiency of the reaction with the best mixing effect. In addition, a baffle is set on the inner wall of the reactor to further improve the safety of the production process.

[0019] 2. The utility model can monitor key parameters such as temperature, pressure, stirring speed, etc. in the reaction process in real time and automatically adjust them as needed. This automatic control system can ensure that the reaction process is carried out under safe and stable conditions, effectively avoiding safety accidents caused by operating errors or equipment failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0021] Figure 1 A schematic structural diagram of the utility model.

[0022] The reference numerals in the accompanying drawings are:

[0023] 1-jacket; 2-kettle body; 4-baffle; 5-ear seat; 6-magnetic transmission device; 7-motor; 8-downward-turning blade; 9-mixed-flow blade; 10-self-priming blade; 11-gas distributor; A-gas phase feed port; D-heat transfer oil inlet; N-heat transfer oil outlet. DETAILED DESCRIPTION

[0024] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0025] Embodiment 1:

[0026] See also Figure 1 The present embodiment provides a novel reactor for rearrangement of high-boiling organic silicon, comprising a jacket 1, a kettle body 2 and a stirring device, wherein the jacket 1 is sleeved on the outside of the kettle body 2, and the stirring device is fixedly arranged on the inside of the kettle body 2; the kettle body 2 is provided with a gas phase feed port A, and the gas phase feed port A is provided with a gas distributor 11 for evenly distributing the cracking gas in the kettle body 2, the top and bottom of the kettle body 2 are both provided with a feed port and a discharge port, and the feed port and the discharge port at the bottom of the kettle body 2 are provided with inclined surfaces, and the inclination angle is 45 degrees.

[0027] The stirring device is provided with three layers of stirring blades, which are downward turning blades 8, mixed flow blades 9 and self-priming blades 10 from top to bottom. The inner wall of the kettle body 2 corresponding to the blades is provided with baffles 4 for controlling pressure and reaction temperature.

[0028] The stirring device includes a motor 7 and a magnetic transmission device 6. The motor 7 is arranged at the upper end of the magnetic transmission device 6 to provide power for the magnetic transmission device 6. The magnetic transmission device 6 enters the kettle body from the upper end of the kettle body 2 to drive the downward-turning blade 8, the mixed-flow blade 9 and the self-priming blade 10 for stirring.

[0029] The jacket 1 is provided with a heat transfer oil inlet D and a heat transfer oil outlet N. To facilitate fixing the jacket 1 , an ear seat 5 is provided on the side.

[0030] In this embodiment, the spacing between the downward-turned blade 8 and the mixed-flow blade 9 is set to 200 mm, the spacing between the mixed-flow blade 9 and the self-priming blade 10 is set to 200 mm, the width of the baffle 4 is 100 mm, the measured high-boiling rearrangement yield is 75%, and the material can be discharged continuously for more than 1000 hours.

[0031] The high-boiling filtrate, crude monomer and monomethyl hydrogen are mixed and added to the reactor through the bottom feed port, and the hydrogen is fed into a simple open distributor below the liquid surface from the gas phase feed port A; under high temperature and high pressure, the materials and hydrogen react in the continuously stirred reactor. The reaction product consists of methyl hydrogen dichlorosilane, crude monomer, low-boiling substances and part of high-boiling substances. The product is decompressed from the top of the high-boiling rearrangement reactor in the form of vapor and then condensed to enter the first step.

[0032] Embodiment 2:

[0033] This embodiment adopts the device of Example 1, and the spacing between the downward-turned blade 8 and the mixed-flow blade 9 is set to 300 mm, the spacing between the mixed-flow blade 9 and the self-priming blade 10 is set to 300 mm, the width of the baffle 4 is 200 mm, the measured high-boiling rearrangement yield is 78%, and the material can be discharged continuously for more than 1200 hours.

[0034] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.

Claims

1. A novel reaction kettle for rearrangement of high-boiling organic silicon products, comprising a jacket (1), a kettle body (2) and a stirring device, wherein the jacket (1) is sleeved on the outside of the kettle body (2), and the stirring device is fixedly arranged on the inside of the kettle body (2); Features: The stirring device is provided with three layers of stirring blades, which are, from top to bottom, downward-turning blades (8), mixed-flow blades (9) and self-priming blades (10), and baffles (4) for controlling pressure and reaction temperature are provided on the inner wall of the kettle body (2) at positions corresponding to the blades.

2. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: The stirring device comprises a motor (7) and a magnetic transmission device (6). The motor (7) is arranged at the upper end of the magnetic transmission device (6) to provide power to the magnetic transmission device (6). The magnetic transmission device (6) enters the kettle body from the upper end of the kettle body (2) to drive the downward-turning blade (8), the mixed-flow blade (9) and the self-priming blade (10) to stir.

3. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: The spacing between the downward-turned blade (8) and the mixed-flow blade (9) is 200-400 mm, the spacing between the mixed-flow blade (9) and the self-priming blade (10) is 200-400 mm, and the width of the baffle (4) is 100-200 mm.

4. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: The kettle body (2) is provided with a gas phase feed inlet (A), and the gas phase feed inlet (A) is provided with a gas distributor (11) for evenly distributing the cracking gas in the kettle body (2).

5. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: The top and bottom of the kettle body (2) are both provided with a feed inlet and a discharge outlet.

6. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 5, characterized in that: The feed inlet and the discharge outlet at the bottom of the kettle body (2) are provided with inclined surfaces, and the inclination angle is 30-60 degrees.

7. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 5, characterized in that: The feed port and the discharge port are provided with pressure and temperature monitoring devices.

8. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: The jacket (1) is provided with a heat transfer oil inlet (D) and a heat transfer oil outlet (N).

9. The novel reactor for rearrangement of high boiling points of organosilicon according to claim 1, characterized in that: An ear seat (5) is provided on the side of the jacket (1).

Images