CN1038251A - Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock - Google Patents
Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock Download PDFInfo
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- CN1038251A CN1038251A CN88103433A CN88103433A CN1038251A CN 1038251 A CN1038251 A CN 1038251A CN 88103433 A CN88103433 A CN 88103433A CN 88103433 A CN88103433 A CN 88103433A CN 1038251 A CN1038251 A CN 1038251A
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- calcium hydrogen
- phosphate rock
- produce
- fodder
- ground phosphate
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Abstract
Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock.Comprise with ground phosphate rock in the leaching liquid that contains dilute sulphuric acid and salt, soak molten, filter, neutralization, separate plurality of processes, it is characterized in that said process all is to carry out under 15～45 ℃ normal temperature condition.The calcium hydrogen phosphate fodder output height of producing with present method, quality is good, facility investment is few, pollution-free, and can produce byproducts such as semi-hydrated gypsum and compound manure, have high economic benefit.
Description
The present invention relates to a kind of ground phosphate rock and produce the method for calcium hydrogen phosphate fodder.
Calcium hydrogen phosphate fodder is a kind of inorganic chemical product, is widely used in the auxiliary fodder of poultry and livestock, at present domestic and international market being in great demand to it.The technology of producing secondary calcium phosphate with ground phosphate rock once had report on the publication at home, as having delivered the article that is entitled as " by ground phosphate rock direct production calcium hydrogen phosphate fodder " that the chemical industry Room, Yunnan Province poplar generation virtue is write on " inorganic chemicals industry " 1985 the 8th phases, in the literary composition technological process has roughly been done following narration:
1, ground phosphate rock soaks molten
Sulfuric acid concentration 50～60%
Soak 50～60 ℃ of solubility temperatures
2, defluorinate
In leaching liquid, add silicon-dioxide and potassium nitride
Temperature of reaction is 60 ℃ ± 5 ℃
3, arsenic removal
Solution after the defluorinate is added sodium sulphite
Temperature of reaction is 50 ℃ ± 5 ℃
4, neutralization
Add milk of lime, temperature of reaction is 70～80 ℃
In and pH value be 4～5
5, norm quota of consumption secondary calcium phosphate unit consumption per ton
Ground phosphate rock (contains P
2O
5＞30%) 2.44 ton
(98%) 1.7 ton in sulfuric acid
Subsidiary material are not announced
In addition, also published one piece of " the salt acid system is produced the research of feed calcium novel process " paper of being write by Hunan Province chemistry institute Yao Ding literary composition, Wang Changhui on 1988 the 1st phases " inorganic chemicals industry ", mainly having introduced saltouts with hydrochloric acid prepares the non-waste-emission technology of calcium chlorophosphate and calcium chloride.The method of another kind of production calcium hydrogen phosphate fodder has been proposed.Because this method other processes except that the preparation of saltouing are all bigger with the present invention's difference, do not run business into particular one at this and state.
Analyze above-mentioned technology as can be seen, their shortcoming is: 1. sulfuric acid concentration is big, and corrodibility is strong; 2. temperature of reaction is higher, and energy consumption is big; 3. there are defluorinate, silica removal operation, technology complicated; 4. need to use other chemical reagent (as sodium sulphite and Potassium monofluoride), cost height.
Purpose of the present invention will propose a kind of more easy rational production method exactly, has operational path simplification, characteristics such as facility investment is few, pollution is low, consumption is low, good product quality, benefit height.
Cardinal principle of the present invention and chemical reaction process can be summarized with following chemical equation.
Production technique can be used block representation shown in the drawings.
Above-mentioned operation condition is:
Ground phosphate rock soak molten:
H in the leaching liquid
2SO
4Concentration: 12～16%
NaCl concentration: 5～8%
The ground phosphate rock dosage is a leaching liquid weight 14～20%
Temperature of reaction: 15～45 ℃
Reaction end control PH=0.5
2. first sections neutralization:
Neutral temperature: 15～45 ℃
Lime milk concentration: saturated solution
Terminal point control: PH=2.5～3.0
3. second sections neutralization:
Neutral temperature: 15～45 ℃
Lime milk concentration: saturated solution
Terminal point control: PH=4～5
Contrast prior art as can be seen, the present invention has following characteristics:
1. in method, adopt dilute sulphuric acid leaching ground phosphate rock, normal-temperature reaction, thus very little to equipment corrosion, only need in the production to use the hard polyvinyl chloride plate lining to get final product;
2. present method adopts the non-waste-emission circulation process, and pollution-free in the production, the no three wastes do not need to be provided with special fluorine treatment system.Owing to adopt dilute sulfuric acid ground phosphate rock, hydrofluoric acid that reaction produces and the silicon-dioxide impurity in the ground phosphate rock generate silicofluoric acid and react with salt, generate Sodium Silicofluoride and hydrogenchloride, Sodium Silicofluoride is discharged with slag, hydrogenchloride will play katalysis in solution, further quickened the molten speed of soaking of phosphatic rock;
3. present method is taked two sections neutralisations, reaction is carried out at normal temperatures, according to foreign data report, leaching liquid in one section and the time, add milk of lime and adjust the pH value of appropriateness, to remove fluorine, the silicon compound of trace, finished product will obtain purifying, remove fluorine, the silicon of trace like this, just do not need to add chemical reagent such as sodium sulphite, this has not only simplified technology, has reduced facility investment, and has reduced raw material consumption;
Present method to the grade of ground phosphate rock not lotus ask, so raw material is cheap and easy to get;
5. that utilizes that present method produces raises the output of calcium output considerably beyond fertile calcium, remarkable in economical benefits.
It is for reference to exemplify embodiments of the invention below, and this embodiment is not unique certainly.
Hard vinyon bucket is used in reaction, mother liquor water 1745 grams that add after finished product filters for the first time (also can with clear water as no mother liquor water, only speed of response is slower), 98% sulfuric acid 294 grams, solid salt 120 grams, slowly add 367 gram ground phosphate rock in the leaching liquid then, the survey pH value is controlled at 0.5 after 20 minutes, is incubated to react completely under 15～45 ℃ of normal temperature.Then reaction mass is carried out vacuum filtration, filter flask is with 400 milliliters and 200 milliliters of clear water washed twice, and washing water are mixed with mother liquor, adds milk of lime and neutralize under 15～45 ℃ of normal temperature, PH control 2.8.Stir after 10 minutes, carry out suction filtration.Filtrated stock adds milk of lime and carries out the neutralization second time, and temperature of reaction is 15～45 ℃, reaction PH control 4～5.Stir and carry out the suction filtration second time after 10 minutes, the mother liquor conduct of suction filtration complex acid is next time used.Finished product is with 50～60 ℃ of warm water circulation cleanings, and then with the finished product dry packing, finished product heavily is 208 grams.Filter residue toasted 2 hours under 200 ℃ of conditions for the first time, made semi-hydrated gypsum, can make material of construction such as chalk and white gypsum cement.Filter residue contains P for the second time
2O
5＞28%, add amount of urea, but sylvite and trace element production composite fertilizer.Whole technology is tightly reasonable.The no three wastes, remarkable in economical benefits.According to the test of several repeat condition, reproducibility is fine, and every index all meets the requirements.As use present method to produce secondary calcium phosphate, unit consumption per ton has obvious decline than the example in Yunnan Province.The unit consumption measuring and calculating of present embodiment is as follows:
Ground phosphate rock (P
2O
5〉=25%): 1.8～2.0 tons
Sulfuric acid (98%): 1.5～1.7 tons
Salt (industrial): 0.5～0.6 ton
Claims (2)
1, produce the method for calcium hydrogen phosphate fodder with ground phosphate rock, comprise with ground phosphate rock in the leaching liquid that contains dilute sulphuric acid and salt, soak molten, filter, neutralize, separate plurality of processes, it is characterized in that: said process all is to carry out under 15～45 ℃ normal temperature condition.
2, the method for claim 1 is characterized in that: in the leaching liquid
H
2SO
4Concentration is 12～16%.
NaCl concentration is 5～8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88103433A CN1038251A (en) | 1988-06-02 | 1988-06-02 | Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88103433A CN1038251A (en) | 1988-06-02 | 1988-06-02 | Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1038251A true CN1038251A (en) | 1989-12-27 |
Family
ID=4832599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88103433A Pending CN1038251A (en) | 1988-06-02 | 1988-06-02 | Produce the method for calcium hydrogen phosphate fodder with ground phosphate rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041812C (en) * | 1996-08-23 | 1999-01-27 | 四川绵竹龙蟒矿物质饲料集团有限公司 | Production method for fodder grade calcium hydrogen phosphate |
| CN1044458C (en) * | 1996-01-23 | 1999-08-04 | 魏如铎 | Method for producing calcium hydrophosphate and monocalcium phosphate as feeds |
| CN1045423C (en) * | 1995-10-20 | 1999-10-06 | 四川联合大学 | Method for producing feed calcium hydrogen phosphate |
-
1988
- 1988-06-02 CN CN88103433A patent/CN1038251A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045423C (en) * | 1995-10-20 | 1999-10-06 | 四川联合大学 | Method for producing feed calcium hydrogen phosphate |
| CN1044458C (en) * | 1996-01-23 | 1999-08-04 | 魏如铎 | Method for producing calcium hydrophosphate and monocalcium phosphate as feeds |
| CN1041812C (en) * | 1996-08-23 | 1999-01-27 | 四川绵竹龙蟒矿物质饲料集团有限公司 | Production method for fodder grade calcium hydrogen phosphate |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |