CN108313995A - Wet-process phosphoric acid concentration defluorinate integral method - Google Patents
Wet-process phosphoric acid concentration defluorinate integral method Download PDFInfo
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- CN108313995A CN108313995A CN201810331925.2A CN201810331925A CN108313995A CN 108313995 A CN108313995 A CN 108313995A CN 201810331925 A CN201810331925 A CN 201810331925A CN 108313995 A CN108313995 A CN 108313995A
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- phosphoric acid
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- defluorinate
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- wet process
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/2343—Concentration concomitant with purification, e.g. elimination of fluorine
- C01B25/2346—Concentration
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Fodder In General (AREA)
Abstract
The invention discloses wet-process phosphoric acid concentration defluorinate integral methods, belong to phosphorous chemical industry field.Wet-process phosphoric acid concentration defluorination technology is to utilize the phosphoric acid by wet process of nonphosphate precipitation method wet phosphoric acid purifying technology purification, wherein Al2O3Removal efficiency is higher than 97%." concentration+defluorinate " integrated technique is realized by purified phosphoric acid,diluted.Phosphoric acid by wet process P after processing2O5Mass concentration is more than 46%, P2O5/ F mass ratioes are more than 250, meet the quality requirements of calcium hydrophosphate fodder raw material phosphoric acid.
Description
Technical field
The invention belongs to phosphorous chemical industry fields.It is related specifically to wet-process phosphoric acid concentration defluorinate integrated technique.
Background technology
Calcium monohydrogen phosphate is a kind of important phosphorus chemical product, mainly there is two kinds of producers of thermal phosphoric acid method and wet phosphoric acid
Method.The calcium monohydrogen phosphate impurities that wherein prepared by thermal phosphoric acid method are low, are generally used to manufacture feed grade or even food grade phosphoric acid hydrogen
Calcium, but the method energy consumption is big, and processing is complicated；Calcium monohydrogen phosphate prepared by wet phosphoric acid is generally used for producing due to impurities height
Fertilizer.In today of economic height development, the rational exploitation and use of the energy has become the focus of international concern, wet method
Phosphoric acid method has become the development trend of phosphorous chemical industry instead of the phosphate product of thermal phosphoric acid method production high added value.
The key of Producing Feed Calcium Hydrogen Phosphate with Wet Phosphoric Acid is defluorinate process.Currently, the defluorinate of China's phosphoric acid by wet process
Technique mainly has stripping defluorinate method and chemical defluorinate method.At present there is very big problem in two methods.Defluorinate method is wherein stripped,
Since alumina content is high in phosphoric acid by wet process, cause the defluorinate time long, it is difficult to which depth defluorinate, big high energy consumption of defluorinating agent dosage etc. are asked
Topic.Chemical defluorinate needs to increase the equipment such as filter press, and filter medium is difficult to handle and wear filter seriously.In view of the above-mentioned problems, this Shen
It please propose wet-process phosphoric acid concentration defluorinate integrated technique.The technology is in nonphosphate precipitation method wet phosphoric acid purifying technology
On the basis of propose, defluorinate process is synchronously completed on the basis of concentration, realizes " concentration+defluorinate " integration.It is wet after processing
Method phosphoric acid P2O5Mass concentration is more than 46%, P2O5/ F mass ratioes are more than 250, meet the product of calcium hydrophosphate fodder raw material phosphoric acid
Matter requirement.
Invention content
The invention discloses wet-process phosphoric acid concentration defluorinate integrated techniques, belong to phosphorous chemical industry field.Wet-process phosphoric acid concentration is de-
Fluorine technology is to utilize the phosphoric acid by wet process of nonphosphate precipitation method wet phosphoric acid purifying technology purification, wherein Al2O3Removal efficiency is higher than
97%." concentration+defluorinate " integrated technique is realized by purified phosphoric acid,diluted.Phosphoric acid by wet process P after processing2O5Mass concentration
More than 46%, P2O5/ F mass ratioes are more than 250, meet the quality requirements of calcium hydrophosphate fodder raw material phosphoric acid.
Technical solution is used by the present invention solves the above problems：
Wet-process phosphoric acid concentration defluorinate integrated technique, it is characterised in that utilize nonphosphate precipitation method wet phosphoric acid purifying skill
The phosphoric acid by wet process of art purification, wherein Al2O3Removal efficiency is higher than 97%." concentration+defluorinate " one is realized by purified phosphoric acid,diluted
Change technology.Phosphoric acid by wet process P after processing2O5Mass concentration is more than 46%, P2O5/ F mass ratioes are more than 250, meet feed grade phosphoric acid
The quality requirements of hydrogen calcium raw material phosphoric acid.
(1) phosphoric acid,diluted passes through nonphosphate precipitation method wet phosphoric acid purifying technology Al2O3Removal efficiency is higher than 97%.
(2) wet defluorination of phosphoric acid agent is white carbon, and dosage is 1.2 times of phosphoric acid by wet process chemistry defluorinate theoretical amount.
The present invention has the advantage that and innovation：
Phosphoric acid,diluted concentration defluorinating integration is realized, reduces production process, considerably reduces production cost.
Specific implementation mode
Wet-process phosphoric acid concentration defluorinate integrated technique is applied to Yunnan Yuntianhua Group phosphorizing treatment
Embodiment 1
Phosphoric acid by wet process makes Al through nonphosphate precipitation wet phosphoric acid purifying technology2O3Removal efficiency 98.1%, the acid are concentrated de-
Fluorine, defluorinating agent addition are 1.2 times of theoretical amount, after processing phosphoric acid by wet process P2O5Mass concentration is 48.6%, P2O5/ F mass
Than 278.
Embodiment 2
Phosphoric acid by wet process makes Al through nonphosphate precipitation wet phosphoric acid purifying technology2O3Removal efficiency 97.6%, the acid are concentrated de-
Fluorine, defluorinating agent addition are 1.2 times of theoretical amount, after processing phosphoric acid by wet process P2O5Mass concentration is 47.5%, P2O5/ F mass
Than 258.
Embodiment 3
Phosphoric acid by wet process makes Al through nonphosphate precipitation wet phosphoric acid purifying technology2O3Removal efficiency 99.6%, the acid are concentrated de-
Fluorine, defluorinating agent addition are 1.2 times of theoretical amount, after processing phosphoric acid by wet process P2O5Mass concentration is 47.9%, P2O5/ F mass
Than 298.
Claims (2)
1. wet-process phosphoric acid concentration defluorinate integral method, it is characterised in that：Utilize nonphosphate precipitation method wet phosphoric acid purifying skill
The phosphoric acid by wet process of art purification realizes " concentration+defluorinate " integration, after processing phosphoric acid by wet process P by purified phosphoric acid,diluted2O5
Mass concentration is more than 46%, P2O5/ F mass ratioes are more than 250, and wet defluorination of phosphoric acid agent is white carbon, and dosage is phosphoric acid by wet process chemistry
1.2 times of defluorinate theoretical amount.
2. wet-process phosphoric acid concentration defluorinate integral method, it is characterised in that：Phosphoric acid by wet process is net through nonphosphate precipitation phosphoric acid by wet process
Change technology makes Al2O3Removal efficiency 98.1%, the concentrated defluorinate of the acid, defluorinating agent addition are 1.2 times of theoretical amount, after processing
Phosphoric acid by wet process P2O5Mass concentration is 48.6%, P2O5/ F mass ratioes 278.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810331925.2A CN108313995A (en) | 2018-04-13 | 2018-04-13 | Wet-process phosphoric acid concentration defluorinate integral method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810331925.2A CN108313995A (en) | 2018-04-13 | 2018-04-13 | Wet-process phosphoric acid concentration defluorinate integral method |
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| CN108313995A true CN108313995A (en) | 2018-07-24 |
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| CN201810331925.2A Pending CN108313995A (en) | 2018-04-13 | 2018-04-13 | Wet-process phosphoric acid concentration defluorinate integral method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910852A (en) * | 2018-08-30 | 2018-11-30 | 云南磷化集团有限公司 | A kind of method of phosphoric acid by wet process slag acid preparation feed grade MCP |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292353A (en) * | 1999-09-23 | 2001-04-25 | 化学工业部上海化工研究院 | Production method of feed-level calcium hydrogen phosphate |
| CN1579930A (en) * | 2003-08-08 | 2005-02-16 | 四川川恒化工有限责任公司 | New method for concentrating and purifying wet phosphoric acid by humid heat joint |
| EA015200B1 (en) * | 2009-04-20 | 2011-06-30 | Открытое Акционерное Общество "Научно-Исследовательский Институт По Удобрениям И Инсектофунгицидам Им. Профессора Я.В. Самойлова" | Method of concentrating and defluorination of phosphoric acid |
| CN105366654A (en) * | 2015-12-02 | 2016-03-02 | 云南磷化集团有限公司 | Wet process phosphoric acid purification technology of nonphosphate precipitation |
| CN106185855A (en) * | 2016-06-30 | 2016-12-07 | 云南磷化集团有限公司 | A kind of feed grade phosphoric acid by wet process deep-purifying method |
-
2018
- 2018-04-13 CN CN201810331925.2A patent/CN108313995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292353A (en) * | 1999-09-23 | 2001-04-25 | 化学工业部上海化工研究院 | Production method of feed-level calcium hydrogen phosphate |
| CN1579930A (en) * | 2003-08-08 | 2005-02-16 | 四川川恒化工有限责任公司 | New method for concentrating and purifying wet phosphoric acid by humid heat joint |
| EA015200B1 (en) * | 2009-04-20 | 2011-06-30 | Открытое Акционерное Общество "Научно-Исследовательский Институт По Удобрениям И Инсектофунгицидам Им. Профессора Я.В. Самойлова" | Method of concentrating and defluorination of phosphoric acid |
| CN105366654A (en) * | 2015-12-02 | 2016-03-02 | 云南磷化集团有限公司 | Wet process phosphoric acid purification technology of nonphosphate precipitation |
| CN106185855A (en) * | 2016-06-30 | 2016-12-07 | 云南磷化集团有限公司 | A kind of feed grade phosphoric acid by wet process deep-purifying method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910852A (en) * | 2018-08-30 | 2018-11-30 | 云南磷化集团有限公司 | A kind of method of phosphoric acid by wet process slag acid preparation feed grade MCP |
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Application publication date: 20180724 |