CN85102466A

CN85102466A - The new soda and sociation center of a kind of continuous production soda ash and ammonium chloride

Info

Publication number: CN85102466A
Application number: CN 85102466
Authority: CN
Inventors: 段景山
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-04-01
Filing date: 1985-04-01
Publication date: 1986-07-30

Abstract

The new soda and sociation center of a kind of continuous production soda ash and ammonium chloride is a kind of novel technique that belongs to soda and sociation center.The characteristics of present method are to do raw material with bicarbonate of ammonia and salt, add a kind of intermediate salt in reaction solution, impel heavy alkali and ammonium chloride separating under normal temperature and pressure conditions.This method had both fully phased out large-scale and complicated device of the prior art; The combination reaction formula that has also broken through known bicarbonate of ammonia and salt fully is difficult for isolating the technical barrier of heavy alkali of particulate state and high-quality ammonium chloride in actual applications, be the simplification prior art, and opened up new approach for medium and small sized enterprises utilize bicarbonate of ammonia volume increase soda ash and high-quality ammonium chloride in a large number.

Description

The new soda and sociation center of a kind of continuous production soda ash and ammonium chloride

The invention belongs to a kind of novel technique of soda and sociation center.

For a long time, soda ash is the bigger a kind of important Chemicals of market demand.The preparation of heavy alkali (sodium bicarbonate) then is an important process process during soda ash is produced.In the prior art, domestic majority is to adopt by producing heavy alkali (sodium bicarbonate) and producing the soda and sociation center that two technological processs of ammonium chloride constitute.This method must dispose the expensive device that produces carbonic acid gas and synthetic ammonia respectively, produce the tall and big carbonation reaction tower of heavy alkali, and low temperature is produced the cool crystallizer of ammonium chloride, complex apparatus such as salting-out crystallizer and large-scale Refrigerating Machinery.The data that No. 3493329 patent documentations of the U.S. provide, then be that sodium sulfate is dissolved in the carbonate solution of ammonia, produce sodium bicarbonate and ammonium sulfate through absorbing carbon dioxide, then with ammonium sulfate heating and adding sodium-chlor, therefrom regenerate sodium sulfate and ammonia, and produce in order to make the hydrogen chloride gas of spirit of salt.

As can be seen, the main deficiency of prior art is that equipment is huge, complex process, investment height, the place is big, efficient is low, and is simultaneously, well-known, in common ammonia fertilizer, ammonium chloride is higher and stable in properties because of its nitrogen content, be subjected to welcoming widely, though and bicarbonate of ammonia belongs to aboundresources, cheap, but because of its nitrogen content is lower, and volatile, do not resemble the ammonium chloride very popular.Therefore, when exploring simplification soda ash production technique, continue to guarantee the production of ammonium chloride, and be that bicarbonate of ammonia is in the industrial approach of seeking a widespread use, this is a crucial problem, according to the known chemical reactions formula, bicarbonate of ammonia and salt can produce heavy alkali and ammonium chloride by following reaction formula through chemical combination.

But owing to current some Technology does not also reach a standard, thereby when practical application, according to this reaction, it is very difficult to separate heavy alkali under normal temperature and pressure conditions.Generally can only obtain the heavy alkali of pulpous state, and can not isolate the heavy alkali of particulate state that industry needs; Simultaneously, the extraction of ammonium chloride is difficulty also, and the ammonium chloride quality of acquisition does not reach requirement yet, so this reaction formula can not obtain payable application so far.

The objective of the invention is according to above-mentioned reaction formula,, find out and a kind ofly can extensively utilize bicarbonate of ammonia to do raw material, and can isolate the best soda and sociation center of heavy alkali of qualified particulate state and high-quality ammonium chloride by research and improvement to Technology.

Basic craft course of the present invention is to add a kind of intermediate salt that can reduce the chloride leach degree in reaction solution, and adds bicarbonate of ammonia under certain stirring velocity and time equably, isolates heavy alkali through combination reaction.Reaction solution behind the heavy alkali of separation adds salt under certain condition, can isolate ammonium chloride again.

Advantage of the present invention is can be under normal temperature and pressure conditions, guarantee normally and apace to react, and capable of circulation isolate heavy alkali of particulate state and the high-quality ammonium chloride that industry needs, the large-scale carbonation reaction tower that neither needs to produce the expensive device of carbonic acid gas and synthetic ammonium in the prior art and produce heavy alkali, and the complex apparatus such as cool crystallizer, salting-out crystallizer and Refrigerating Machinery of producing ammonium chloride; The chemical equation of also having broken through bicarbonate of ammonia and salt fully is difficult to isolate the technical barrier of heavy alkali of particulate state and high-quality ammonium chloride in actual applications, thereby for simplifying the technological process and the tooling of prior art, reduce the investment of founding the factory significantly, reduction of erection time, utilize bicarbonate of ammonia volume increase soda ash and high-quality ammonium chloride to open up new approach in a large number in particular for medium and small sized enterprises.

Accompanying drawing has been explained technical process of the present invention.(I) among the figure and (II) are represented retort (I) and retort (II) respectively.(1) and (3) represent heavy alkali separating machine and ammonium chloride separating machine respectively, (2) expression soda ash calcining furnace.

Be brief description (referring to accompanying drawing) below to realizing best way of the present invention:

1. in retort (I), add saturated aqueous common salt and a kind of intermediate salt, and under certain stirring velocity and time, add bicarbonate of ammonia equably, after reacting, separate the reaction solution that obtains heavy alkali (solid phase sodium bicarbonate) and contain ammonium chloride by separating machine.

2. will separate the reaction solution input retort (II) that contains ammonium chloride that heavy alkali obtains later on, water is cooled to below 25 ℃, and adds salt under certain stirring velocity, obtains the solid-phase chlorination ammonium by the separating machine separation after reacting.

3. will separate the later reaction solution that contains salt that obtains of solid-phase chlorination ammonium and turn back to retort (I), and follow-up program (I) and program (II) constantly circulate return multiple, and in two kinds of reaction solutions, add salt and bicarbonate of ammonia respectively, separate continuously and produce heavy alkali and solid-phase chlorination ammonium.

4. the reaction solution that contains the ammonium chloride reaction solution and contain salt that produces in program (2) and program (3) can recycle, but intermediate salt only adds once.

The best implementation condition of the inventive method is: intermediate salt is a kind of vitriol or nitrate, for example can select wherein any such as ammonium sulfate, sodium sulfate, ammonium nitrate or SODIUMNITRATE for use.The add-on of intermediate salt and bicarbonate of ammonia is respectively every liter of reaction solution 0.3～0.7 mol and 1～3 mol; Bicarbonate of ammonia is not less than with every jar charging time and evenly was advisable in 30 minutes, otherwise heavy alkali particle is meticulous, not easily separated.Temperature of reaction is 25～35 ℃, and the stirring velocity when reinforced is 60～120 rev/mins, and the reaction times is 1～2 hour.The isolating temperature of heavy alkali is 35～40 ℃, and heavy alkali should be with blotting after 35～40 ℃ the water flushing during separation.The salt add-on is every liter of reaction solution 1～3 mol, and the adding granularity of salt is 80～100 orders.Temperature of reaction is below 25 ℃, 1～2 hour separating ammonium chloride.

Set up the combined soda method factory of 10 tons of daily outputs according to the inventive method, investment only needs RMB 80～400,000 yuan, half a year visible benefit, and set up the combined soda method factory of a same size by prior art, and investment needs RMB more than 1,000,000 yuan approximately, and the time needs 1 year at least, the product quality of utilizing the present invention to produce, soda ash is not less than three grades of industry, and ammonium chloride is not less than industrial secondary, is equal to or higher than respectively the soda ash of prior art production and the quality of ammonium chloride. On economic benefit, utilize the inventive method to produce one ton soda ash and one ton ammonium chloride, approximately can obtain about 280 yuan of gross profit RMB.

Claims

1, the new soda and sociation center of a kind of continuous production soda ash and ammonium chloride, with bicarbonate of ammonia and salt is raw material, through combination reaction and filtering separation, constantly produce heavy alkali (sodium bicarbonate) and ammonium chloride, thereafter weight alkali calcining is made soda ash, this soda and sociation center is characterised in that the combination reaction of said bicarbonate of ammonia and salt, is to add a kind of vitriol or nitrate as intermediate salt in reaction solution, then adds bicarbonate of ammonia under certain stirring velocity equably.

2, according to the said a kind of soda and sociation center of claim 1, it is characterized in that said vitriol or nitrate, can select wherein any such as ammonium sulfate, sodium sulfate, ammonium nitrate or SODIUMNITRATE for use.

3, according to claim 1,2 said a kind of soda and sociation centers, it is characterized in that said vitriol or nitrate, be to add 0.3～0.7 mol, and be once to add, recycle for a long time by every liter of reaction solution.

4,, it is characterized in that said bicarbonate of ammonia is evenly to add by 1～3 molar quantity by speed and every liter of mother liquor that every jar of charging time was not less than 30 minutes according to the said a kind of soda and sociation center of claim 1.

5, according to the said a kind of soda and sociation center of claim 1, the temperature that it is characterized in that said reaction solution is to remain on 25～30 ℃.

6, according to claim 1,4 said a kind of soda and sociation centers, the reaction times that it is characterized in that said reaction solution and bicarbonate of ammonia is 1～2 hour.

7, according to the said a kind of soda and sociation center of claim 1, it is characterized in that the said process of producing ammonium chloride is to separate reaction solution behind the heavy alkali under condition of normal pressure, stirring velocity with 60～120 rev/mins, adding granularity by every liter of reaction solution 1～3 mol is 80～100 purpose salt, and, cool to separate below 25 ℃ and produce through 1～2 hour reaction.

8, according to the said a kind of soda and sociation center of claim 1, the filtering separation that it is characterized in that said heavy alkali is to carry out under 35～40 ℃ temperature, and during separation, heavy alkali should be with blotting after 35～40 ℃ the water flushing.

9, according to the said a kind of soda and sociation center of claim 1, it is characterized in that in said circulating reaction, constantly dose salt and bicarbonate of ammonia respectively in reaction solution after separating heavy alkali and the reaction solution behind the separating ammonium chloride.

According to claim 1,9 said a kind of soda and sociation centers, it is characterized in that in said circulating reaction that 10, bicarbonate of ammonia and salt are to add by every liter of reaction solution 1～3 mol, the granularity of dosing salt is 80～100 orders.