CN101648714A - Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags - Google Patents
Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags Download PDFInfo
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- CN101648714A CN101648714A CN200910041208A CN200910041208A CN101648714A CN 101648714 A CN101648714 A CN 101648714A CN 200910041208 A CN200910041208 A CN 200910041208A CN 200910041208 A CN200910041208 A CN 200910041208A CN 101648714 A CN101648714 A CN 101648714A
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- sodium hydroxide
- calcium carbonate
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- carbide slag
- liquid sodium
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Abstract
The invention discloses a method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags. The main technical scheme is as follows: the carbideslags and soda ash undergo chemical reaction according to a certain proportion to generate mixed liquor of sodium hydroxide and calcium carbonate; dilute sodium hydroxide solution is obtained by centrifuging and is directly distilled to obtain 30% low-concentration liquid caustic soda; the calcium carbonate is obtained by washing, drying, grinding and packaging filter cakes. The method effectively lowers the production cost of liquid sodium hydroxide, increases the productivity of the sodium hydroxide through washing and recycling, simultaneously controls the discharge of three wastes and produces the products.
Description
Technical field:
The present invention relates to the technical field of three chemical wastes and utilization, especially a kind of method of making low liquid sodium hydroxide and co-producing calcium carbonate with carbide slag.
Technical background:
At present, the method for producing sodium hydroxide is except the ionic membrane method, and that has been exactly a causticizing process, mainly is to utilize slaked lime and soda ash to carry out causticizing reaction under certain condition and make.The shortcoming of this method is the production cost height, and productive rate is low, and the three waste discharge phenomenon is arranged.And the present invention is on the basis of causticizing process, utilize the chemical spent material calcium carbide slag to substitute slaked lime cost is reduced greatly, and, both reclaimed alkali lye by washing and improved productive rate the waste residue utilization that discharges after the causticization, produce the ordinary calcium carbonate product again, the three wastes have also obtained improvement simultaneously.
Summary of the invention:
The invention provides and a kind ofly make the method for low liquid sodium hydroxide and co-producing calcium carbonate, effectively reduced the production cost of liquid sodium hydroxide, improved the productive rate of sodium hydroxide again, also administered three waste discharge simultaneously by washing and recycling with carbide slag.
To achieve the above object, technical scheme of the present invention is:
Carbide slag (8) water is modulated into emulsion and the mass ratio of dissolving soda ash (9) well in pure substance: 1: the ratio of 1.23-1.63 is put into temperature control low-temp reaction device (1) lining, under stirring slowly, carry out chemical reaction, temperature of reaction was controlled at the 40-50 degree, obtained the mixing liquid of sodium hydroxide and lime carbonate through 2-5 hour causticizing reaction.Wash through centrifugal (2) afterwards and obtain dilute solution of sodium hydroxide and calcium carbonate wet product after drench separating, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide through underpressure distillation (3) and enters storage tank (4); Lime carbonate drying (5) is pulverized (6), and packing becomes finished product lime carbonate in finishing room (7).
Its chemical principle is: Ca (OH)
2+ Na
2CO
3==2NaOH+CaCO
3
Description of drawings:
This figure is a process flow sheet of the present invention, wherein
The 1------reactor, the 2------whizzer, the 3------distiller, 4------liquid caustic soda storage tank, the 5------drying room, the 6-------pulverizer, the 7------finishing room, the 8------carbide slag is given stockline, and 9------soda ash is given stockline.
Concrete embodiment:
Embodiment one: carbide slag (8) water of 400kg is modulated into emulsion and the mass ratio of dissolving soda ash (9) well in pure substance: 1: 1.43 ratio is put into temperature control low-temp reaction device (1) lining, under stirring slowly, carry out chemical reaction, temperature of reaction was controlled at the 40-50 degree, obtained the mixing liquid of sodium hydroxide and lime carbonate through 3 hours causticizing reactions.Wash through centrifugal (2) afterwards and obtain sodium hydroxide (pure substance 431.7) dilute solution and the wet product of lime carbonate (pure substance 539.62kg) after drench separating, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide (1439kg) through underpressure distillation (3) and enters storage tank (4); Lime carbonate drying (5) is pulverized (6), and packing becomes finished product lime carbonate (539.62kg) in finishing room (7).
Embodiment two: the carbide slag of 400kg is modulated into emulsion and the soda ash mass ratio in pure substance: 1: 1.23 ratio was put in the reactor, and temperature of reaction is controlled at 45 degree, obtained the mixing liquid of sodium hydroxide and lime carbonate through 2 hours causticizing reactions.Obtain sodium hydroxide (pure substance 371.32kg) dilute solution and the wet product of lime carbonate (pure substance 464.15kg) after pouring separates through centrifugal washing afterwards, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide (1237.73kg) through underpressure distillation; The lime carbonate drying is pulverized, and packing becomes finished product lime carbonate (464.15kg).
Embodiment three: the carbide slag of 400kg is modulated into emulsion and the soda ash mass ratio in pure substance: 1: 1.63 ratio was put in the reactor, and temperature of reaction is controlled at 50 degree, obtained the mixing liquid of sodium hydroxide and lime carbonate through 5 hours causticizing reactions.Obtain sodium hydroxide (pure substance 432.43kg) dilute solution and the wet product of lime carbonate (pure substance 540.54kg) after pouring separates through centrifugal washing afterwards, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide (1441.43kg) through underpressure distillation; The lime carbonate drying is pulverized, and packing becomes finished product lime carbonate (540.54kg).
Claims (4)
1 one kinds of carbide slags are made the method for low liquid sodium hydroxide and co-producing calcium carbonate, carrying out chemical reaction by carbide slag and soda ash through abundant stirring obtains, its technical characterictic is that carbide slag and soda ash are according to certain ratio reaction, when producing liquid sodium hydroxide, go back the co-producing calcium carbonate product.
The described a kind of carbide slag of 2 claims 1 is made the method for low liquid sodium hydroxide and co-producing calcium carbonate, and its technical characterictic is that carbide slag and soda ash react according to certain ratio, when producing liquid sodium hydroxide, go back the co-producing calcium carbonate product.Concrete process flow steps is:
Carbide slag (8) water is modulated into emulsion and the mass ratio of dissolving soda ash (8) well in pure substance: 1: the ratio of 1.23-1.63 is put into temperature control low-temp reaction device (1) lining, under stirring slowly, carry out chemical reaction, temperature of reaction was controlled at the 40-50 degree, obtained the mixing liquid of sodium hydroxide and lime carbonate through 2-3 hour causticizing reaction.Wash through centrifugal (2) afterwards and obtain dilute solution of sodium hydroxide and calcium carbonate wet product after drench separating, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide through underpressure distillation (3) and enters storage tank (4); Lime carbonate drying (5) is pulverized (6), and packing becomes finished product lime carbonate in finishing room (7).
The described a kind of carbide slag of 3 claims 2 is made the method for low liquid sodium hydroxide and co-producing calcium carbonate, the described mixing liquid that obtains sodium hydroxide and lime carbonate through causticizing reaction.Wash through centrifugal (2) afterwards and obtain dilute solution of sodium hydroxide and calcium carbonate wet product after drench separating, dilute solution of sodium hydroxide obtains 30% liquid sodium hydroxide through underpressure distillation (3) and enters storage tank (4).
The described a kind of carbide slag of 4 claims 2 is made the method for low liquid sodium hydroxide and co-producing calcium carbonate, the described mixing liquid that obtains sodium hydroxide and lime carbonate through causticizing reaction, wash through centrifugal (2) afterwards and obtain dilute solution of sodium hydroxide and calcium carbonate wet product after pouring separates, lime carbonate drying (5), pulverize (6), packing becomes finished product lime carbonate in finishing room (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041208A CN101648714A (en) | 2009-07-17 | 2009-07-17 | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags |
| CN 201010157782 CN101885504A (en) | 2009-07-17 | 2010-03-24 | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041208A CN101648714A (en) | 2009-07-17 | 2009-07-17 | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags |
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|---|---|
| CN101648714A true CN101648714A (en) | 2010-02-17 |
Family
ID=41671070
Family Applications (2)
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|---|---|---|---|
| CN200910041208A Pending CN101648714A (en) | 2009-07-17 | 2009-07-17 | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slags |
| CN 201010157782 Pending CN101885504A (en) | 2009-07-17 | 2010-03-24 | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219586A (en) * | 2016-08-02 | 2016-12-14 | 王延军 | A kind of be raw material production nanometer grade calcium carbonate with carbide slag device and method |
| CN110590509A (en) * | 2019-09-25 | 2019-12-20 | 山西永东化工股份有限公司 | Production method for carbon dioxide cyclic decomposition coking crude phenol coproduction desulfurizer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079536B (en) * | 2010-12-03 | 2012-10-10 | 桐柏兴源化工有限公司 | Method for producing caustic soda and papermaking filler calcium carbonate by using natural alkali liquor |
| CN110330408A (en) * | 2019-07-23 | 2019-10-15 | 山西永东化工股份有限公司 | A kind of gas Cycle-decomposition coking crude phenol coproduction light calcium production method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62148320A (en) * | 1985-12-20 | 1987-07-02 | Catalysts & Chem Ind Co Ltd | Production of scaly calcium carbide |
| JP3874978B2 (en) * | 2000-01-18 | 2007-01-31 | 日本製紙株式会社 | Method for producing calcium carbonate and sodium hydroxide |
| CN101092240A (en) * | 2006-06-23 | 2007-12-26 | 北京清华紫光英力化工技术有限责任公司 | New technique for preparing sodium hydroxide |
-
2009
- 2009-07-17 CN CN200910041208A patent/CN101648714A/en active Pending
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2010
- 2010-03-24 CN CN 201010157782 patent/CN101885504A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219586A (en) * | 2016-08-02 | 2016-12-14 | 王延军 | A kind of be raw material production nanometer grade calcium carbonate with carbide slag device and method |
| CN110590509A (en) * | 2019-09-25 | 2019-12-20 | 山西永东化工股份有限公司 | Production method for carbon dioxide cyclic decomposition coking crude phenol coproduction desulfurizer |
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| CN101885504A (en) | 2010-11-17 |
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Open date: 20100217 |