Continuous production device for preparing sodium tert-butoxide by using supergravity reactor

Abstract

The utility model discloses a continuous production device for preparing sodium tert-butoxide by using a supergravity reactor, which comprises the supergravity reactor and a liquid sodium storage tank, and a discharge port of the liquid sodium storage tank is connected with a liquid sodium feed port of the supergravity reactor through a first transfer pump; the system further comprises a tertiary butanol storage tank, a discharge port of the tertiary butanol storage tank is connected with a shell pass feed port of the heat exchanger through a second transfer pump, and a shell pass discharge port of the heat exchanger is connected with a tertiary butanol gas inlet of the supergravity reactor. And a discharge port of the supergravity reactor is connected with a feed port of the film evaporator. The high-efficiency mass transfer and mixing process of the supergravity reactor improves the reaction rate, can save a large amount of energy, and has the advantages of more uniform reactants and better reaction effect. The device adopts liquid sodium as a raw material to replace traditional solid sodium, the raw material is purer, the total alkali content of the product is higher, and the free alkali content is lower. The device adopts the film evaporator for drying, is simple in process operation, small in occupied space and high in efficiency, and can achieve continuous production of drying while reacting.

Description

Technical Field

[0001] This utility model belongs to the field of metal alkoxide technology, and relates to sodium tert-butoxide, specifically to a continuous production device for preparing sodium tert-butoxide using a supergravity reactor. Background Technology

[0002] Sodium tert-butoxide, a white crystalline solid, is widely used as a strong base in condensation, rearrangement, and ring-opening reactions in chemical, pharmaceutical, pesticide, and organic synthesis processes. Currently, the common method for preparing sodium tert-butoxide is the metal method, which involves the intermittent reaction of metallic sodium with tert-butanol. However, due to the electron-donating effect of the alkyl group in tert-butanol, the polarity of the OH bond decreases, resulting in the slowest reaction between tert-butanol and metallic sodium. This method is costly, inefficient, energy-intensive, requires a large footprint, and is difficult to scale up for continuous production.

[0003] Therefore, finding a continuous production process for sodium tert-butoxide that is efficient, low-cost, and of superior quality has become a major challenge in this field. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a continuous production device for preparing sodium tert-butoxide using a supergravity reactor, so as to solve the technical problem that the reaction efficiency of the existing production device needs to be further improved.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A continuous production apparatus for preparing sodium tert-butoxide using a supergravity reactor includes a supergravity reactor and a liquid sodium storage tank. The outlet of the liquid sodium storage tank is connected to the liquid sodium inlet of the supergravity reactor via a first transfer pump.

[0007] It also includes a tert-butanol storage tank, the outlet of which is connected to the shell-side inlet of the heat exchanger via a second transfer pump, and the shell-side outlet of the heat exchanger is connected to the tert-butanol inlet of the supergravity reactor.

[0008] The outlet of the supergravity reactor is connected to the inlet of the thin-film evaporator.

[0009] The present invention also has the following technical features:

[0010] The outlet of the supergravity reactor is connected to the shell-side feed inlet of the condenser, and the outlet of the thin-film evaporator is connected to the shell-side feed inlet of the condenser; the shell-side outlet of the condenser is connected to the feed inlet of the tert-butanol storage tank.

[0011] The shell-side outlet of the condenser is connected to the tail gas absorption tower.

[0012] The solid discharge port of the thin film evaporator is connected to the packaging machine via a tubular chain conveyor.

[0013] The supergravity reactor is equipped with a rotor inside, and multiple liquid distributors are installed on the rotor. The interior of the supergravity reactor is filled with packing material around the liquid distributors. The bottom of the supergravity reactor is equipped with a tert-butanol inlet and a discharge outlet, and the top of the supergravity reactor is equipped with an outlet and a liquid sodium inlet.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects:

[0015] (I) This device uses a supergravity reactor. The supergravity reactor has a highly efficient mass transfer and mixing process, which improves the reaction rate, saves a lot of energy, and makes the reactants more uniform and the reaction effect better.

[0016] (II) This device uses liquid sodium as raw material instead of traditional solid sodium, resulting in purer raw material, higher total alkali in the product, and lower free alkali.

[0017] (III) This device uses a thin-film evaporator for drying, which is simple to operate, occupies little space, and is highly efficient, enabling continuous production that can achieve simultaneous reaction and drying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a continuous production unit for preparing sodium tert-butoxide using a centrifugal reactor.

[0019] The labels in the diagram represent the following: 1-Supergravity reactor, 2-Liquid sodium storage tank, 3-First transfer pump, 4-Thin film evaporator, 5-T-tert-butanol storage tank, 6-Second transfer pump, 7-Heat exchanger, 8-Condenser, 9-Tail gas absorption tower, 10-Tube chain machine, 11-Packaging machine, 12-Pipeline, 13-Valve.

[0020] 101-Rotor, 102-Liquid distributor, 103-Packing, 104-Terbutanol inlet, 105-Outlet, 106-Liquid sodium inlet, 107-Outlet.

[0021] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, all components, equipment and raw materials in this utility model are based on components, equipment and raw materials known in the prior art.

[0023] In this invention, the various devices are mainly connected by pipes 12. Each pipe 12 is equipped with a valve 13 as needed, which is opened or closed according to process requirements. All valves 13 in this invention are commonly used valves in the prior art.

[0024] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0025] Example:

[0026] This embodiment provides a continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor, such as... Figure 1 As shown, it includes a supergravity reactor 1 and a liquid sodium storage tank 2. The outlet of the liquid sodium storage tank 2 is connected to the liquid sodium inlet 106 of the supergravity reactor 1 through a first transfer pump 3.

[0027] like Figure 1 As shown, it also includes a tert-butanol storage tank 5. The outlet of the tert-butanol storage tank 5 is connected to the shell-side inlet of the heat exchanger 7 via a second transfer pump 6. The shell-side outlet of the heat exchanger 7 is connected to the tert-butanol inlet 104 of the supergravity reactor 1.

[0028] like Figure 1 As shown, the outlet 107 of the supergravity reactor 1 is connected to the inlet of the thin film evaporator 4.

[0029] As a preferred embodiment of this invention, such as Figure 1 As shown, the outlet 105 of the supergravity reactor 1 is connected to the shell-side feed inlet of the condenser 8, the outlet of the thin film evaporator 4 is connected to the shell-side feed inlet of the condenser 8, and the shell-side outlet of the condenser 8 is connected to the feed inlet of the tert-butanol storage tank 5.

[0030] As a preferred embodiment of this invention, such as Figure 1 As shown, the shell-side outlet of the condenser 8 is connected to the tail gas absorption tower 9.

[0031] As a preferred embodiment of this invention, such as Figure 1 As shown, the solid discharge port of the thin film evaporator 4 is connected to the packaging machine 11 via the tubular chain conveyor 10.

[0032] As a preferred embodiment of this invention, such as Figure 1As shown, the interior of the hypergravity reactor 1 is equipped with a rotor 101, and multiple liquid distributors 102 are installed on the rotor 101. The interior of the hypergravity reactor 1 is filled with packing material 103 around the liquid distributors 102. The bottom of the hypergravity reactor 1 is equipped with a tert-butanol inlet 104 and a discharge outlet 107, and the top of the hypergravity reactor 1 is equipped with an outlet 105 and a liquid sodium inlet 106.

[0033] In the hypergravity reactor 1 of this embodiment, a liquid distribution system consisting of 10 spiral liquid distributors 102 driven by a rotor 101 is used. When the rotor 101 rotates at high speed inside the hypergravity reactor 1, the material forms a thin liquid film under the action of hypergravity. This liquid film is torn into micro- and nano-sized liquid micro-elements under the action of high-speed shear force, forming a large and constantly renewed surface area, which is further increased by the packing 103. At the same time, under the conditions of high dispersion, high turbulence, and strong mixing, the gas contacts the liquid film in the opposite direction at a very high relative velocity, which increases the interphase mass transfer rate by several times compared with conventional reactors.

[0034] In this embodiment, the liquid sodium storage tank 2 is equipped with a known temperature control system to keep the sodium in a liquid state at all times.

[0035] In this embodiment, the thin-film evaporator 4 has a simple operation, small footprint, and high efficiency, and can achieve continuous production with simultaneous reaction and drying. The separated tert-butanol content is over 99.90%, which is then recycled back into the system.

[0036] The continuous production process for preparing methanol alkoxides using the alkali method with the continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor according to this invention is as follows:

[0037] The condenser 8 and heat exchanger 7 are pre-opened, the hypergravity reactor 1 is turned on, the preset temperature is 110°C, the second transfer pump 6 and the corresponding valves are turned on, and tert-butanol is vaporized through the heat exchanger 7 and continuously fed into the hypergravity reactor 1. After the tert-butanol vapor fills the entire system, liquid sodium is continuously fed into the hypergravity reactor 1 through the first transfer pump 3 and the corresponding valves. The liquid sodium is dispersed into the packing 103 through the liquid distributor 102 and reacts fully with the tert-butanol gas.

[0038] The tail gas generated from the reaction of liquid sodium with tert-butanol vapor, along with some of the tert-butanol vapor, enters condenser 8. The non-condensable tail gas enters tail gas absorption tower 9, and the condensed tert-butanol enters tert-butanol storage tank 5 for recycling. Simultaneously, thin-film evaporator 4 is turned on and preheated to 110°C.

[0039] After 0.5 hours, the generated liquid sodium tert-butoxide enters the thin-film evaporator 4 through outlet 107 for drying. The dried tert-butanol gas enters the condenser 8 for condensation, and the condensed liquid tert-butanol also enters the tert-butanol storage tank 5 for recycling. The dried solid sodium tert-butoxide product enters the packaging machine 11 through the tubular chain conveyor 10 for packaging, thus forming a continuous cycle production process.

Claims

1. A continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor, comprising a centrifugal reactor (1), characterized in that, It also includes a liquid sodium storage tank (2), the outlet of which is connected to the liquid sodium inlet (106) of the supergravity reactor (1) via a first transfer pump (3); It also includes a tert-butanol storage tank (5), the outlet of which is connected to the shell-side inlet of the heat exchanger (7) via a second transfer pump (6), and the shell-side outlet of the heat exchanger (7) is connected to the tert-butanol inlet (104) of the supergravity reactor (1). The outlet (107) of the supergravity reactor (1) is connected to the inlet of the thin film evaporator (4).

2. The continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor as described in claim 1, characterized in that, The outlet (105) of the supergravity reactor (1) is connected to the shell-side feed port of the condenser (8), the outlet of the thin film evaporator (4) is connected to the shell-side feed port of the condenser (8), and the shell-side outlet of the condenser (8) is connected to the feed port of the tert-butanol storage tank (5).

3. The continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor as described in claim 2, characterized in that, The shell-side outlet of the condenser (8) is connected to the tail gas absorption tower (9).

4. The continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor as described in claim 1, characterized in that, The solid discharge port of the thin film evaporator (4) is connected to the packaging machine (11) via a tubular chain machine (10).

5. The continuous production apparatus for preparing sodium tert-butoxide using a centrifugal reactor as described in claim 1, characterized in that, The supergravity reactor (1) is equipped with a rotor (101) inside, and multiple liquid distributors (102) are provided on the rotor (101). The supergravity reactor (1) is filled with packing material (103) around the liquid distributors (102). The bottom of the supergravity reactor (1) is provided with a tert-butanol inlet (104) and a discharge outlet (107). The top of the supergravity reactor (1) is provided with an outlet (105) and a liquid sodium inlet (106).

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