CN105197908B - A kind of production method of high-dissolvability sodium tripolyphosphate - Google Patents
A kind of production method of high-dissolvability sodium tripolyphosphate Download PDFInfo
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- CN105197908B CN105197908B CN201510582500.5A CN201510582500A CN105197908B CN 105197908 B CN105197908 B CN 105197908B CN 201510582500 A CN201510582500 A CN 201510582500A CN 105197908 B CN105197908 B CN 105197908B
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- sodium tripolyphosphate
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- dissolvability
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Abstract
The present invention provides a kind of production method of high-dissolvability sodium tripolyphosphate, this method is first to add liquid caustic soda in neutralization reaction kettle, phosphoric acid is added slowly with stirring to be reacted, neutralizer degree of neutralization K values are adjusted 2.9 ± 0.1, continue to react to solution in thick, added in neutralizer after a certain amount of ammonium nitrate, neutralize slip temperature is kept more than 95 DEG C, it is sprayed into through high pressure nozzle and dries, polymerize in revolution polyfurnace, granular high-dissolvability sodium tripolyphosphate is generated, then passes through packed products after cooling, screening.Compared with doing raw material using sodium carbonate, product per ton reduces CO20.3 ton of discharge capacity, 0.6 ton of steam consumption of reduction per ton, by 70000 tons of sodium tripolyphosphates of annual production, can reduce CO every year221000 tons of discharge capacity, steam saving 42000t converts into 408 tons of standard coal, is that energy-saving and emission-reduction are made that significant contribution.
Description
Technical field
The present invention relates to a kind of production method of sodium tripolyphosphate, specially high dissolving of the solubility up to 25g/mL and the above
Spend the production method of sodium tripolyphosphate.
Background technology
China's sodium tripolyphosphate starts production after nineteen sixty-five, and sodium tripolyphosphate is widely used in detergent, is used as auxiliary agent, fertilizer
Soap synergist and prevent soap slab crystallize and frosting, industrial water water softener, process hides pretanning agent, dyeing assistant, oil well pick mud control
Agent, paper processed greasy dirt preventing agent, effective dispersant of the suspension such as paint, kaolin, magnesia, calcium carbonate processing.Food grade
Sodium tripolyphosphate can as various fish products food quality modifying agent, the fining agent of beverage.In commercial Application, trimerization phosphorus
Sour sodium needs to be dissolved in water in most cases, but the solubility of sodium tripolyphosphate at normal temperatures in water only 13.6g/
100mL, sodium tripolyphosphate easily lumps in the case of oversaturated, have impact on its application down to a certain degree.
The content of the invention
Pass through rotary furnace One-step production high-dissolvability using phosphoric acid and liquid caustic soda as raw material it is an object of the invention to provide one kind
The technique of sodium tripolyphosphate, is characterized in that raw material is easy to get, cost is low, and technique is simple, and industrialization is easily realized.
Specific embodiment is as follows：
First a certain amount of liquid caustic soda is added in neutralization reaction kettle, phosphoric acid is added slowly with stirring and carries out neutralization reaction, adjust
Whole neutralizer degree of neutralization K values continue to react to solution in thick, a certain amount of nitric acid are added in neutralizer 2.9 ± 0.1
After ammonium, it is sprayed into through nozzle and dries, polymerize in revolution polyfurnace, granular high-dissolvability sodium tripolyphosphate is generated, then lead to
Packed products after supercooling, screening.
In above-mentioned reaction, liquid caustic soda is first added, phosphoric acid is slow added into, the degree of neutralization of neutralizer is adjusted 2.9 ± 0.1,
And add a certain amount of ammonium nitrate（The addition of ammonium nitrate is the 0.2-1.0% of neutralizer gross weight.）.Wherein, ammonium nitrate is added
Neutralizer by high pressure nozzle spray into revolution polyfurnace in dry, polymerization before, control its add ammonium nitrate neutralization liquid temperature
Degree is more than 95 DEG C.
Polymerization temperature control is at 450-480 DEG C, and the type content of product I is controlled between 10-20%.Whole course of reaction can use
Following reaction equation is represented：
3H3PO4+5NaOH→NaH2PO4+2Na2HPO4+5H2O
NaH2PO4+2Na2HPO4→Na5P3O10+2H2O
Present invention process, equipment are simple, are easy to operation, it is easy to accomplish industrialized production, with high dissolving produced by the present invention
Sodium tripolyphosphate is spent, solubility is high, and more than 25g can be dissolved in 100mL water under normal temperature.And production per ton in process of production
Product reduce CO20.3 ton of discharge capacity, reduces steam consumption 0.6t, and effects of energy saving and emission reduction is obvious.
The product of the present invention is obtained by rotary furnace One-step production, and difference is not compared with common sodium tripolyphosphate for cost
Greatly, the main content of finished product sodium tripolyphosphate produced is more than 95%, and each impurity content is given birth to far below sodium carbonate for raw material
The sodium tripolyphosphate of production, the solubility in 100mL water is in more than 25g at normal temperatures, with common sodium tripolyphosphate solubility height
Go out by about one time, price about 1000-2000 members higher than common sodium tripolyphosphate, remarkable in economical benefits, and the huge market demand.In addition
Produced using liquid caustic soda instead of sodium carbonate as raw material, compared with doing raw material using sodium carbonate, product per ton reduces CO2Discharge
0.3 ton of amount, 0.6 ton of steam consumption of reduction per ton, 70000 tons of sodium tripolyphosphates are produced by company, CO can be reduced every year every year2
21000 tons of discharge capacity, steam saving 42000t converts into 408 tons of standard coal, is that energy-saving and emission-reduction are made that significant contribution.
Embodiment
Embodiment 1
First by 12 tons of liquid caustic soda（Content 48%）Add in neutralization reaction kettle, be added slowly with stirring 10 tons of phosphoric acid（Content
85%）Reacted, adjustment neutralizer degree of neutralization K values continue to react to solution in thick, added in neutralizer 2.90
After 40 kilograms of ammonium nitrate, it is sprayed into rotary furnace through high pressure nozzle and dries, polymerize, control polymerization temperature is in 465 DEG C, product
The control of I type content in 12-18%, generate granular high-dissolvability sodium tripolyphosphate, then by being packaged into after cooling, screening
Product.The product tripolyphosphate sodium content is more than 97% after testing.
High-dissolvability sodium tripolyphosphate is deliquescent to be determined：
100ml normal-temperature waters are taken, are fitted into 250ml beakers, with 200-240 rpm stirring speed in magnetic stirring apparatus
Under degree, 25g sodium tripolyphosphates are poured into this beaker, after stirring 5 minutes, the limpid free from admixture of solution.
Embodiment 2
First by 15 tons of liquid caustic soda（Content 45%）Add in neutralization reaction kettle, be added slowly with stirring 12 tons of phosphoric acid（Content
88%）Reacted, adjustment neutralizer degree of neutralization K values continue to react to solution in thick, added in neutralizer 2.91
After 80 kilograms of ammonium nitrate, it is sprayed into rotary furnace through high pressure nozzle and dries, polymerize, control polymerization temperature is in 450 DEG C, product
The control of I type content in 10-15%, generate granular high-dissolvability sodium tripolyphosphate, then by being packaged into after cooling, screening
Product.The product tripolyphosphate sodium content is more than 98% after testing.
Claims (1)
1. a kind of production method of high-dissolvability sodium tripolyphosphate, it is characterised in that the solubility of sodium tripolyphosphate is 25g/mL
More than, its specific production method is as follows：
First the sodium hydroxide solution of 12 tons of content 48% is added in neutralization reaction kettle, 10 tons of contents are added slowly with stirring
85% phosphoric acid is reacted, and adjustment neutralizer degree of neutralization K values continue to react to solution in thick, in neutralizer 2.90
After the ammonium nitrate of 40 kilograms of addition, it is sprayed into rotary furnace through high pressure nozzle and dries, polymerize, control polymerization temperature at 465 DEG C,
The I type content control of product generates granular high-dissolvability sodium tripolyphosphate in 12-18%, then by being wrapped after cooling, screening
Product are dressed up, the product tripolyphosphate sodium content is more than 97% after testing.
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| CN201510582500.5A CN105197908B (en) | 2015-09-15 | 2015-09-15 | A kind of production method of high-dissolvability sodium tripolyphosphate |
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| CN201510582500.5A CN105197908B (en) | 2015-09-15 | 2015-09-15 | A kind of production method of high-dissolvability sodium tripolyphosphate |
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| CN105197908A CN105197908A (en) | 2015-12-30 |
| CN105197908B true CN105197908B (en) | 2017-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112850681A (en) * | 2021-02-01 | 2021-05-28 | 云南云天化股份有限公司 | Method for preparing potassium tripolyphosphate through one-step dehydration polymerization |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2148011C1 (en) * | 1998-12-17 | 2000-04-27 | ОАО "Волховский алюминий" | Sodium tripolyphosphate hexahydrate production process |
| CN1539730A (en) * | 2003-10-29 | 2004-10-27 | 张立民 | New technique for producing disodium phosphate |
| RU2285663C1 (en) * | 2005-06-08 | 2006-10-20 | Открытое акционерное общество "Воскресенский научно-исследовательский институт по удобрениям и фосфорной кислоте (НИУиФ)" | Method of production of polyphosphates of the alkali metals from the purified extraction phosphoric acid |
| CN102583294A (en) * | 2012-03-12 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
| CN103466586A (en) * | 2013-09-26 | 2013-12-25 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by taking mixture of sodium nitrate and ammonium nitrate as catalyst |
| CN104310365A (en) * | 2013-09-30 | 2015-01-28 | 昆山市巴城镇顺拓工程机械配件厂 | Method for preparing sodium tripolyphosphate by mixing wet-process phosphoric acid and hot-process phosphoric acid |
-
2015
- 2015-09-15 CN CN201510582500.5A patent/CN105197908B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2148011C1 (en) * | 1998-12-17 | 2000-04-27 | ОАО "Волховский алюминий" | Sodium tripolyphosphate hexahydrate production process |
| CN1539730A (en) * | 2003-10-29 | 2004-10-27 | 张立民 | New technique for producing disodium phosphate |
| RU2285663C1 (en) * | 2005-06-08 | 2006-10-20 | Открытое акционерное общество "Воскресенский научно-исследовательский институт по удобрениям и фосфорной кислоте (НИУиФ)" | Method of production of polyphosphates of the alkali metals from the purified extraction phosphoric acid |
| CN102583294A (en) * | 2012-03-12 | 2012-07-18 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by replacing ammonium nitrate with sodium nitrate taken as catalyst |
| CN103466586A (en) * | 2013-09-26 | 2013-12-25 | 瓮福（集团）有限责任公司 | Method for producing sodium tripolyphosphate by taking mixture of sodium nitrate and ammonium nitrate as catalyst |
| CN104310365A (en) * | 2013-09-30 | 2015-01-28 | 昆山市巴城镇顺拓工程机械配件厂 | Method for preparing sodium tripolyphosphate by mixing wet-process phosphoric acid and hot-process phosphoric acid |
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| CN105197908A (en) | 2015-12-30 |
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