CN105080432A - Sodium chloroacetate continuous cyanation tower-type reactor and reaction method thereof - Google Patents
Sodium chloroacetate continuous cyanation tower-type reactor and reaction method thereof Download PDFInfo
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- CN105080432A CN105080432A CN201510446025.9A CN201510446025A CN105080432A CN 105080432 A CN105080432 A CN 105080432A CN 201510446025 A CN201510446025 A CN 201510446025A CN 105080432 A CN105080432 A CN 105080432A
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- sodium chloroacetate
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Abstract
A sodium chloroacetate continuous cyanation tower-type reactor is disclosed. According to the reactor, the bottom is provided with a product collector, the top is provided with a vapor collector, each of the left and right sides is provided with a measuring pocket, a metering pump, a flow measuring device and a feedstock distributor, the measuring pocket is connected with the metering pump, the metering pump is connected with the flow measuring device, and the flow measuring device is connected with the feedstock distributor; the feedstock distributor at the left side is connected with multiple second distributor, and the feedstock distributor at the right side is connected with multiple first distributor; and the space between two filling material layers of the tower-type reactor is at least provided with one first distributor, one second distributor and a condenser pipe, and the fluid flowing directions of the first distributor and the second distributor are opposite. By utilizing the provided tower-type reactor to perform continuous cyanation on sodium chloroacetate, the reaction and evaporation are coupled, and the problems that temperature runs away, a pot belches out something and the like are overcome.
Description
Technical field
The invention belongs to chemicals synthesis field, relate to the continuous cyanogenation tower reactor of sodium chloroacetate and reaction method thereof.
Background technology
Cyanoacetic acid sodium is a kind of broad-spectrum basic chemical industry raw material, is mainly used in malonate, cyanoacetate is produced.Cyanoacetic acid sodium can be obtained by carbonylic preparation method and sodium chloroacetate Process for the cyanation.Oxo synthesis take carbon monoxide as raw material, under higher temperature and pressure, is that catalyst synthesis obtains with heavy metal.The method is due to expensive catalyst, and catalyst recovery is had any problem, and cost is higher; Sodium chloroacetate cyaniding is with sodium chloroacetate and Cymag for Material synthesis obtains, this method due to technique simple, raw material is easy to get, and production cost is lower, is industrially used widely.But the cyanogenation carried out due to sodium chloroacetate and Cymag is that a Fast exothermic reacts, course of reaction controls difficulty, often occur temperature runaway in production, emit the phenomenons such as pot, product color is pitch black, the process further such as need to decolour, affect product yield and quality, restriction production is carried out.The object of this invention is to provide a kind of mild condition, the method for cyanoacetic acid sodium cyaniding quality can be ensured.
Traditional handicraft sodium chloroacetate cyanogenation carries out in the reactor of intermittently operated in the past, concrete grammar is quantitatively added in reactor by sodium chloroacetate solution, drip sodium cyanide solution lentamente, process strictly need control rate of addition, otherwise reaction can occur instantaneously, cause temperature runaway, emit the phenomenons such as pot.Cymag is hypertoxic raw material, abnormality occurs and very easily causes personal injury, produce serious consequence.Sodium chloroacetate cyanogenation is Fast exothermic reaction in addition, and course of reaction need pass into a large amount of cooling water and be removed by reaction heat, needs consumed energy.
Summary of the invention
For solving the problems of the technologies described above, the invention provides the continuous cyanogenation tower reactor of a kind of sodium chloroacetate, the bottom of described tower reactor is provided with product collector, top is provided with steam collector, each side be provided with a dosage bunker, measuring pump, a flow measurement device and a feed distributor, in every side, described dosage bunker is connected with described measuring pump, described measuring pump is connected with described flow measurement device, described flow measurement device is connected with described feed distributor, and the feed distributor in left side is connected with multiple second distributor; The feed distributor on right side is connected with multiple first distributor, first distributor and second distributor and a condenser pipe is at least provided with between every two packing layers of tower reactor, fluid flow direction in described first distributor and the second distributor is contrary, packing layer material in described tower reactor is cermet, and described packing layer is provided with multiple open-work communicated up and down.
Wherein, the aperture of described open-work is 0.2-1cm.
Wherein, the diameter ratio of described first distributor and the second distributor is 1:1-1:3.
Wherein, described first distributor is set to 1-8.
Wherein, described second distributor is set to 1-8.
Wherein, described packing layer is set to 1-8.
The present invention also provides a kind of method utilizing above-mentioned tower reactor to carry out the continuous cyanogenation of sodium chloroacetate, comprises the steps:
S1: prepare sodium chloroacetate solution and sodium cyanide solution that molar concentration is 10%-70% in dosage bunker respectively;
S2: the sodium chloroacetate solution prepared and sodium cyanide solution are reacted respectively by the distributor in measuring pump, flow measurement device and feed distributor feeding tower reactor.
Wherein, the molar concentration of described sodium chloroacetate solution is 20%-30%.
Wherein, the molar concentration of described sodium cyanide solution is 20%-30%.
Wherein, reaction temperature is between 30-40 degree, and the reaction time is less than half an hour.
The continuous cyanogenation of sodium chloroacetate is carried out by utilizing tower reactor provided by the present invention, reaction can be coupled with evaporation, utilize sodium chloroacetate cyanogenation to release heat, the moisture in vaporization reaction system, maintain system temperature, overcome course of reaction temperature runaway, emit the problems such as pot.
Accompanying drawing explanation
Fig. 1: the structural representation of the continuous cyanogenation tower reactor of sodium chloroacetate of the present invention;
Description of reference numerals
11,12 dosage bunkers
21,22 measuring pumps
31,32 flow measurement devices
41,42 feed distributors
51 first distributors
52 second distributors
6 condenser pipes
7 packing layers
8 steam collectors
9 product collector
Detailed description of the invention
As shown in Figure 1, for the continuous cyanogenation tower reactor of a kind of sodium chloroacetate provided by the invention, the bottom of described tower reactor is provided with product collector 9, top is provided with steam collector 8, each side be provided with a dosage bunker 11, 12, a measuring pump 21, 22, a flow measurement device 31, 32 and a feed distributor 41, 42, in every side, described dosage bunker 11, 12 with described measuring pump 21, 22 connect, described measuring pump 21, 22 with described flow measurement device 31, 32 connect, described flow measurement device 31, 32 with described feed distributor 41, 42 connect, the feed distributor 42 in left side is connected with multiple second distributor 52, the feed distributor 41 on right side is connected with multiple first distributor 51, first distributor 51 and second distributor 52 and a condenser pipe 6 is at least provided with between every two packing layers 7 of tower reactor, fluid flow direction in described first distributor 51 and the second distributor 52 is contrary.Packing layer 7 material is set to cermet, described packing layer 7 is provided with multiple open-work communicated up and down, the setting of cermet and open-work, can ensure that the heat in tower reactor is got rid of in time, also can ensure that product is collected in product collector 9 successively, the aperture of described open-work is 0.2-1cm simultaneously.In the present embodiment, described first distributor 51 and the second distributor 52 are respectively set to two, packing layer 7 is set to three layers, first distributor 51 is provided with between every two-layer packing layer 7, second distributor 52 and a condenser pipe 6, in practical operation, packing layer 7 can be set to multilayer, such as, 2-8 layer, same, multiple first distributor 51 can be provided with between every two-layer packing layer 7, multiple second distributor 52 and many condenser pipes 6, such as, respectively be set to 2-8 root, the number of plies of packing layer 7 is more, first distributor 51, second distributor 52 and condenser pipe more than 6, in reaction, the evaporation of heat is more abundant, temperature maintains more stable, also more the reaction time can be saved, the diameter of the first distributor and the second distributor is than being 1:1-1:3, so that in cyanogenation process, the amount of matching requirements reactant.
When carrying out the continuous cyanogenation of sodium chloroacetate, sodium chloroacetate solution and sodium cyanide solution that molar concentration is 20%-30% is prepared respectively in dosage bunker, by the sodium chloroacetate solution for preparing and sodium cyanide solution respectively by measuring pump, flow measurement device and feed distributor are sent in the first distributor 51 in tower reactor and the second distributor 52, during concrete enforcement, the feed distributor 42 of sodium chloroacetate through left side can be made to enter in the second distributor 52, the feed distributor 41 of sodium cyanide solution through right side is made to enter in the first distributor 51, also the feed distributor 42 of Cymag through left side can be made to enter in the second distributor 52, the feed distributor 41 of sodium chloroacetate solution through right side is made to enter in the first distributor 51, because in the first distributor 51 and the second distributor 52, the flow direction of fluid is contrary, therefore, no matter which kind of feeding manner, can realize being similar to the well-beaten technique effect of limit border ring, the abundant heat release of course of reaction can be ensured, reaction temperature maintains 30-40 degree.
In actual mechanical process, on the diameter of the first distributor 51 and the second distributor 52 and packing layer, the aperture of open-work also can make the appropriate adjustments according to reaction time, reaction condition, condenser pipe 6 position etc., reaction is carried out under the environment of the best, ensure most suitable material ratio, realize maximum thermal release, realize the effect of economize energy simultaneously.
These are only preferred embodiment of the present invention, can not limit protection scope of the present invention with this, the simple equivalence namely generally made according to claims of the present invention and summary of the invention changes and amendment, all still belongs to the protection domain of patent application of the present invention.
Claims (10)
1. the continuous cyanogenation tower reactor of sodium chloroacetate, it is characterized in that: the bottom of described tower reactor is provided with product collector, top is provided with steam collector, each side be provided with a dosage bunker, measuring pump, a flow measurement device and a feed distributor, in every side, described dosage bunker is connected with described measuring pump, and described measuring pump is connected with described flow measurement device, and described flow measurement device is connected with described feed distributor; The feed distributor in left side is connected with multiple second distributor, the feed distributor on right side is connected with multiple first distributor, first distributor and second distributor and a condenser pipe is at least provided with between every two packing layers of tower reactor, fluid flow direction in described first distributor and the second distributor is contrary, packing layer material in described tower reactor is cermet, and described packing layer is provided with multiple open-work communicated up and down.
2. the continuous cyanogenation tower reactor of sodium chloroacetate as claimed in claim 1, is characterized in that: the aperture of described open-work is 0.2-1cm.
3. the continuous cyanogenation tower reactor of sodium chloroacetate as claimed in claim 1, is characterized in that: the diameter of described first distributor and the second distributor is than being 1:1-1:3.
4. the continuous cyanogenation tower reactor of sodium chloroacetate as claimed in claim 1, is characterized in that: described first distributor is set to 2-8.
5. the continuous cyanogenation tower reactor of sodium chloroacetate as claimed in claim 1, is characterized in that: described second distributor is set to 2-8.
6. the continuous cyanogenation tower reactor of the sodium chloroacetate according to any one of claim 1-5, is characterized in that: described packing layer is set to 2-8.
7. utilize the tower reactor according to any one of claim 1-6 to carry out a method for the continuous cyanogenation of sodium chloroacetate, it is characterized in that: comprise the steps:
S1: prepare sodium chloroacetate solution and sodium cyanide solution that molar concentration is 10%-70% in dosage bunker respectively;
S2: the sodium chloroacetate solution prepared and sodium cyanide solution are reacted respectively by the distributor in measuring pump, flow measurement device and feed distributor feeding tower reactor.
8. the continuous cyanogenation method of sodium chloroacetate as claimed in claim 7, is characterized in that: the molar concentration of described sodium chloroacetate solution is 20%-30%.
9. the continuous cyanogenation method of sodium chloroacetate as claimed in claim 7, is characterized in that: the molar concentration of described sodium cyanide solution is 20%-30%.
10. the continuous cyanogenation method of sodium chloroacetate as claimed in any one of claims 7-9, is characterized in that: reaction temperature is between 30-40 degree, and the reaction time is less than half an hour.
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| CN201510446025.9A CN105080432A (en) | 2015-07-27 | 2015-07-27 | Sodium chloroacetate continuous cyanation tower-type reactor and reaction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167432A (en) * | 2005-07-22 | 2015-12-23 | 游泳方式公司 | Canopy chair |
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| JPH07163857A (en) * | 1993-05-25 | 1995-06-27 | Buehler Ag | Apparatus and method for supplying solid existing in flow of gas and solid from fluidized bed |
| EP0635293B1 (en) * | 1993-07-19 | 1998-05-13 | Jgc Corporation | Liquid-liquid contactor |
| CN2640594Y (en) * | 2003-07-28 | 2004-09-15 | 钱百龄 | Fluid stream neutralization reactor |
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| CN105167432A (en) * | 2005-07-22 | 2015-12-23 | 游泳方式公司 | Canopy chair |
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Application publication date: 20151125 |