CN202078889U

CN202078889U - Production device for preparing 3-nitrobenzenesulfonic acid through tubular nitrobenzene sulfonation reaction

Info

Publication number: CN202078889U
Application number: CN2011200933706U
Authority: CN
Inventors: 吴剑华
Original assignee: Shenyang University of Chemical Technology
Current assignee: Shenyang University of Chemical Technology
Priority date: 2011-04-01
Filing date: 2011-04-01
Publication date: 2011-12-21
Anticipated expiration: 2021-04-01

Abstract

The utility model relates to a production device for chemical products, in particular to a production device for preparing 3-nitrobenzenesulfonic acid through tubular nitrobenzene sulfonation reaction. The production device comprises a nitrobenzene storage tank (1), a sulfur trioxide storage tank (2), a tubular sulfonation reactor (3), a kettle-type sulfonation reactor (4), a material delivery pump (5), an injection pump (6), connecting pipelines and accessories (a valve, a flowmeter, a temperature gauge, an explosion-proof membrane, a sight glass and the like). The nitrobenzene and sulfur trioxide sulfonating agent enter the tubular sulfonation reactor (3) proportionally, the tubular sulfonation reactor (3) is connected with the kettle-type sulfonation reactor (4) in series for use, or the tubular sulfonation reactor (3) is independently used. The device is applicable to continuous or intermittent sulfonation reaction and has a good mixing and heat transfer effect, high reaction speed, high production efficiency and large operational flexibility. The production device and production method are applicable to various sulfonation reaction production processes.

Description

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units

Technical field

The utility model relates to a kind of process units of chemical products, and what be specifically related to is that nitrobenzene and sulfur trioxide carry out the process units that sulfonating reaction is produced m-nitrobenzene sulfonic acid.

Technical background

The industrial in the past process units that carries out the nitrobenzene sulfonating reaction is the still formula sulfonation reactor that has chuck, production method is for dropping into nitrobenzene in the still formula sulfonation reactor earlier, start the stirring back and in still formula sulfonation reactor, drip sulfur trioxide, feed cooling agent in the still formula sulfonation reactor chuck and take out reaction heat, to keep suitable reaction temperature.The heat transfer area of this still formula sulfonation reactor is little, and heat transfer coefficient is low, can not effectively shift out reaction heat, has limited the rate of addition of sulfur trioxide, and the production cycle is long, and production efficiency is low; Sulfur trioxide adopts the dropping mode to enter in the still in the still formula sulfonating reaction production method, exists even have to stir, and also can't realize dripping the rapid dispersion of thing, so material concentration skewness in the still, hot-spot can't be avoided; In the still formula sulfonating reaction production method, the time of staying inequality of product in still, the in-depth reaction very easily appears in the early stage product that generates.Hot-spot and reactant time of staying inequality in still are the shortcomings that still formula sulfonating reaction can't overcome in the still.

Therefore, provide a kind of novel, sulfonation reaction device is very significant efficiently.

Summary of the invention

The utility model provides the tubular type nitrobenzene sulfonating reaction that a kind of heat and mass transport is effective, production efficiency is high, the product accessory substance is few process units.Adopt tubular type nitrator and kettle type nitrating reactor to unite and carry out sulfonating reaction, reaction is mainly finished in the tubular type nitrator, also can use the tubular type sulfonation reactor to finish sulfonating reaction separately.

The purpose of this utility model is achieved through the following technical solutions:

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, comprise nitrobenzene basin, sulfur trioxide basin, tubular type sulfonation reactor, still formula sulfonation reactor, material-handling pump, jet pump and connecting line and annex such as valve, flowmeter, thermometer, rupture pressure disc, visor, the tubular type sulfonation reactor is connected with still formula sulfonation reactor.

Described tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, and its tubular type sulfonation reactor is a separate unit or multi-platform combined; The tubular type sulfonation reactor is blank pipe or chemical filler is set in pipe and convection cell has the hybrid element of perturbation action, or be commercially available static mixer, or blank pipe, chemical filler is set in pipe and convection cell has the hybrid element of perturbation action, the combination of static mixer; The tubular type sulfonation reactor installs chuck outward or chuck is not set.

Described tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, it is characterized in that tubular type sulfonation reactor and still formula sulfonation reactor are to connect or tubular type sulfonation reactor independence shape.

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, and SO 3 sulfonated dose of its raw material enters or pressured poor, potential difference enters the tubular type sulfonation reactor through the jet pump suction.

The utlity model has following advantage:

1. this device both can be used for continuous production, also can be used for Batch Process.

2. tubular type sulfonation reactor heat transfer efficiency can in time shift out reaction heat far above still formula sulfonation reactor.

3. tubular type sulfonation reactor good mixing effect, reaction speed is fast, the production efficiency height.

4. when being used for producing continuously, material time of staying in the tubular type sulfonation reactor is even, can realize the laminar flow reaction, can overcome the uneven shortcoming of residence time of material in the batch still formula sulfonation reactor, obviously reduces accessory substance and generates.

5. when being used for intermittent reaction, owing to set up the tubular type sulfonation reactor, can realize rapidly mixing the material that participates in reaction is established member in jet pump and tubular type sulfonation reactor after, can overcome that traditional still formula sulfonation reactor drips charging and the fatal shortcoming of density unevenness and hot-spot in the still that causes.

6. the nitrobenzene sulfonating reaction of this device proposition is produced m-nitrobenzene sulfonic acid process units production efficiency height, operating flexibility is big, accessory substance is few, good product quality.

Description of drawings

Fig. 1 is that the tubular type nitrobenzene sulfonating reaction that the tubular type sulfonation reactor is connected with still formula sulfonation reactor is produced m-nitrobenzene sulfonic acid process units schematic diagram.

Fig. 2 is that the tubular type nitrobenzene sulfonating reaction of no still formula sulfonation reactor is produced m-nitrobenzene sulfonic acid process units schematic diagram.

Fig. 3 is that the tubular type nitrobenzene sulfonating reaction of no still formula sulfonation reactor, the circulation of reactionless product m-nitrobenzene sulfonic acid is produced m-nitrobenzene sulfonic acid process units schematic diagram.

The specific embodiment

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, comprises nitrobenzene basin, sulfur trioxide basin, tubular type sulfonation reactor, still formula sulfonation reactor, material-handling pump, jet pump and connecting line and annex (valve, flowmeter, thermometer, rupture pressure disc, visor etc.).The tubular type sulfonation reactor is connected with still formula sulfonation reactor and is used or the tubular type sulfonation reactor independently uses.

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, but its tubular type sulfonation reactor separate unit uses or multi-platform combined use; The tubular type sulfonation reactor is blank pipe or the hybrid element that convection cells such as chemical filler have perturbation action is set in pipe; The tubular type sulfonation reactor can all or part ofly be commercially available static mixer; Tubular type sulfonation reactor peripheral hardware chuck.

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units can only be provided with the tubular type sulfonation reactor, and still formula sulfonation reactor is not set.

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, and its SO 3 sulfonated dose enters the tubular type sulfonation reactor through jet pump or pressured poor, potential difference.

Tubular type nitrobenzene sulfonating reaction is produced m-nitrobenzene sulfonic acid process units using method, comprises the adjustment flow direction of material, makes nitrobenzene return the nitrobenzene basin through tubular type sulfonation reactor and the heating of still formula sulfonation reactor or after being cooled to set point of temperature; Adjust flow direction of material, make SO 3 sulfonated dose to return the sulfur trioxide basin through tubular type sulfonation reactor and the heating of still formula sulfonation reactor or after being cooled to set point of temperature; Adjust flow direction of material, make nitrobenzene and SO 3 sulfonated dose enter the tubular type sulfonation reactor in proportion and carry out sulfonating reaction through product pump and jet pump, removes reaction heat by cooling medium in the tubular type sulfonation reactor chuck, reactant is formed and is qualifiedly gone subsequent processing or reactant to enter still formula sulfonation reactor to continue to react to reactant and form the qualified subsequent processing that goes.

Also can make the circulation of partial reaction product m-nitrobenzene sulfonic acid enter the tubular type sulfonation reactor once more.Comprise nitrobenzene, SO 3 sulfonated dose, circulation m-nitrobenzene sulfonic acid temperature and the circulation m-nitrobenzene sulfonic acid flow-control initial reaction state adjusted.

The above tubular type nitrobenzene sulfonating reaction produces the m-nitrobenzene sulfonic acid process units and using method is applicable to various sulfonating reaction production processes.

Embodiment one

Tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, comprises that nitrobenzene basin (1), sulfur trioxide basin (2), tubular type sulfonation reactor (3) are that 5 series connection are arranged vertically, still formula sulfonation reactor (4), material-handling pump (5), jet pump (6) and connecting line and annex.Tubular type sulfonation reactor (3) is connected with still formula sulfonation reactor (4), and the circulation of partial reaction product m-nitrobenzene sulfonic acid enters tubular type sulfonation reactor (3) once more, as Fig. 1.

Embodiment two

Embodiment two and embodiment one are basic identical, and difference is that tubular type sulfonation reactor (3) is arranged vertically for separate unit.

Embodiment three

Embodiment three and embodiment one are basic identical, and difference is that tubular type sulfonation reactor (3) is that 5 series connection are horizontally disposed.

Embodiment four

Embodiment four and embodiment one are basic identical, and difference is that tubular type sulfonation reactor (3) is that 5 parallel connections are arranged vertically.

Embodiment five

Embodiment five and embodiment one are basic identical, and difference is that tubular type sulfonation reactor (3) is that 12 series connection are arranged vertically, and no still formula sulfonation reactor (4) is as Fig. 2.

Embodiment six

Embodiment six and embodiment one are basic identical, and difference is that tubular type sulfonation reactor (3) is that 12 series connection are arranged vertically, no still formula sulfonation reactor (4), and reactionless product m-nitrobenzene sulfonic acid circulation is as Fig. 3.

Claims

1. tubular type nitrobenzene sulfonating reaction is produced the m-nitrobenzene sulfonic acid process units, it is characterized in that comprising in nitrobenzene basin (1), sulfur trioxide basin (2), tubular type sulfonation reactor (3), still formula sulfonation reactor (4), material-handling pump (5), jet pump (6) and connecting line and valve, flowmeter, thermometer, rupture pressure disc, the visor one or more, tubular type sulfonation reactor (3) is connected with still formula sulfonation reactor (4).

2. tubular type nitrobenzene sulfonating reaction according to claim 1 is produced the m-nitrobenzene sulfonic acid process units, it is characterized in that tubular type sulfonation reactor (3) is a separate unit or multi-platform combined; Tubular type sulfonation reactor (3) is for blank pipe or chemical filler is set in pipe and convection cell has the hybrid element of perturbation action, or be static mixer, or blank pipe, chemical filler is set in pipe and convection cell has the hybrid element of perturbation action, the combination of static mixer; Tubular type sulfonation reactor (3) is outer to be installed chuck or chuck not to be set.