CN102115051A - Method for producing calcium phosphate by utilizing carbide slag - Google Patents
Method for producing calcium phosphate by utilizing carbide slag Download PDFInfo
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- CN102115051A CN102115051A CN2010106155012A CN201010615501A CN102115051A CN 102115051 A CN102115051 A CN 102115051A CN 2010106155012 A CN2010106155012 A CN 2010106155012A CN 201010615501 A CN201010615501 A CN 201010615501A CN 102115051 A CN102115051 A CN 102115051A
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- calcium
- calcium phosphate
- filter cake
- carbide slag
- carbonic acid
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Abstract
The invention provides a method for producing calcium phosphate by utilizing carbide slag. The method comprises the following steps: grinding the carbide slag into 80-100 meshed crude powder; placing the crude powder in a reactor so as to be fully mixed with water; adding excess hydrochloric acid to the reactor so that oxide in the crude powder is converted to soluble chloride; filtering the reaction product so as to obtain a filtrate mainly containing calcium chloride; reacting the filtrate mainly containing the calcium chloride with an excess carbonic acid solution so that calcium ions and caronate ions are combined into calcium carbonate which is precipitated; filtering so as to obtain a calcium carbonate filter cake; reacting the calcium carbonate filter cake with phosphoric acid so as to obtain a mixture of calcium phosphate precipitate and carbonic acid solution; and filtering and separating the mixture of calcium phosphate precipitate and carbonic acid solution so as to obtain a carbonic acid filtrate and a calcium phosphate filter cake, and drying and smashing the calcium phosphate filter cake so as to obtain the calcium phosphate product. The method is less in equipment investment and is simple to operate, and the obtained calcium phosphate product is high in purity and has large economic value.
Description
Technical field
The present invention relates to carbide slag comprehensive utilization technique field, particularly, relate to a kind of method of producing calcium phosphate with carbide slag.
Background technology
Carbide slag is mainly derived from generated by polyvinyl chloride by calcium carbide and vinyl acetate between to for plastic production.About 1.45 tons of 1 ton of polyvinyl chloride power consumption of every production stone produces carbide slag more than 1 ton, so 1 ton of polyvinyl chloride of every production need be discharged carbide slag more than 2 tons after the calcium carbide hydrolysis per ton.Carbide slag quantity is big, and the alkalinity height contains objectionable impuritiess such as sulphur, arsenic again, and not treated discharging can be stopped up water drain, stops up long-pending riverbed, the harm fish production.Stack then land occupation, contaminate environment on land.
Carbide slag mainly consist of calcium oxide, its content accounts for more than 50%, also contains small amounts magnesium, aluminium sesquioxide, ferric oxide and silicon-dioxide.At present, carbide slag be mainly used in make cement and and material of construction, it is effectively put into composition and is not fully utilized.
Summary of the invention
Carbide slag mainly consist of calcium oxide, its content accounts for more than 50%, also contain small amounts magnesium, aluminium sesquioxide, ferric oxide and silicon-dioxide, in order to make full use of carbide slag, the application provides a kind of method of producing calcium phosphate with carbide slag, and this method is effectively extracted the calcium that contains in the carbide slag, for the industrial application of carbide slag provides new approach, and method is simple, and facility investment is few, is a method that is worthy of popularization.
The application's technical scheme is as follows: a kind of method of producing calcium phosphate with carbide slag, comprise the steps: carbide slag is worn into 80-100 purpose meal, place reactor and water thorough mixing, then in reactor, drop into excessive hydrochloric acid, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, and the filtering reaction product, obtain containing filtrate, also contain a spot of aluminum chloride and iron(ic) chloride in the filtrate based on calcium chloride; Will be based on the filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, yet, because under water surrounding, can not obtain iron carbonate, and also very easily hydrolysis of aluminium carbonate separates with magnesium ion calcium ion with the form of precipitation of calcium carbonate thus with aluminum ion, after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and phosphatase reaction, obtain the mixture of calcium phosphate precipitation and carbonic acid soln again; The mixture of calcium phosphate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium phosphate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium phosphate filter cake drying, pulverizing obtain the calcium phosphate product.
Method of producing calcium phosphate with carbide slag of the present invention is effectively extracted the calcium that contains in the carbide slag, and for the industrial application of carbide slag provides new approach, and method is simple, and facility investment is few, is a method that is worthy of popularization.
Embodiment
Embodiment 1:
A kind of method of producing calcium phosphate with carbide slag, the 500kg carbide slag is worn into 80-100 purpose meal, place reactor and 500kg water thorough mixing, then in reactor, drop into excessive hydrochloric acid, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, and the filtering reaction product, obtain containing filtrate, also contain a spot of aluminum chloride and iron(ic) chloride in the filtrate based on calcium chloride; Will be based on the filtrate filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, and after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and phosphatase reaction, obtain the mixture of calcium phosphate precipitation and carbonic acid soln again; The mixture of calcium phosphate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium phosphate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium phosphate filter cake drying, pulverizing obtain the calcium phosphate product.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (1)
1. method of producing calcium phosphate with carbide slag, it is characterized in that, comprise the steps: carbide slag is worn into 80-100 purpose meal, place reactor and water thorough mixing, then drop into excessive hydrochloric acid in reactor, making the oxygenate conversion in the carbide slag is the muriate of solubility, then, the filtering reaction product obtains containing the filtrate based on calcium chloride, also contains a spot of aluminum chloride and iron(ic) chloride in the filtrate; Will be based on the filtrate filtrate and the excess carbon acid solution reaction of calcium chloride, calcium ion and carbanion are combined into lime carbonate and precipitate, and after filtration, obtain calcium carbonate filter cake; With calcium carbonate filter cake and phosphatase reaction, obtain the mixture of calcium phosphate precipitation and carbonic acid soln again; The mixture of calcium phosphate precipitation and carbonic acid soln separates after filtration, obtains carbonic acid and considers liquid and calcium phosphate filter cake; Carbonic acid soln returns with the filtrate based on calcium chloride and reacts; And calcium phosphate filter cake drying, pulverizing obtain the calcium phosphate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106155012A CN102115051A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium phosphate by utilizing carbide slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106155012A CN102115051A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium phosphate by utilizing carbide slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102115051A true CN102115051A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106155012A Pending CN102115051A (en) | 2010-12-31 | 2010-12-31 | Method for producing calcium phosphate by utilizing carbide slag |
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| CN (1) | CN102115051A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502555A (en) * | 2011-11-21 | 2012-06-20 | 江苏省丹爱化工有限公司 | Preparation method of high-purity calcium phosphate |
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2010
- 2010-12-31 CN CN2010106155012A patent/CN102115051A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502555A (en) * | 2011-11-21 | 2012-06-20 | 江苏省丹爱化工有限公司 | Preparation method of high-purity calcium phosphate |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110706 |