CN102241394A - Scale and corrosion inhibitor used in wet phosphoric acid production - Google Patents
Scale and corrosion inhibitor used in wet phosphoric acid production Download PDFInfo
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- CN102241394A CN102241394A CN 201110112960 CN201110112960A CN102241394A CN 102241394 A CN102241394 A CN 102241394A CN 201110112960 CN201110112960 CN 201110112960 CN 201110112960 A CN201110112960 A CN 201110112960A CN 102241394 A CN102241394 A CN 102241394A
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- corrosion inhibitor
- phosphoric acid
- scale
- acid production
- wet
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Abstract
The invention relates to a scale and corrosion inhibitor used in a wet phosphoric acid production. The scale and corrosion inhibitor is a mixture comprising substances of, by weight, 60%-80% of nitrate, 10-20% of dodecyl sulfonate and 10-20% of diethylene triamine penta (methylene phosphonic acid). The invention has advantages as follows: simply operated preparation method, convenience for usage, good scale and corrosion inhibition effect of the prepared scale and corrosion inhibitor in the wet phosphoric acid production, no influence to subsequent operations, and promising application prospect. In addition, the scale and corrosion inhibitor of the present invention can reach a scale inhibition rate of 89% and a corrosion inhibition rate of 95%.
Description
Technical field
The present invention relates to a kind of anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production.
Background technology
The scale problems of Wet-process Phosphoric Acid Production system is to influence the major issue that wet production is normally carried out.Reactive system in the production process, filtration, concentrate, all there is scale formation in link such as storage, and is wherein serious with filtration fraction again.In dihydrate wet-process phosphoric acid is produced, from the following cross gas plate of disk filter, all serious fouling of phosphoric acid transfer lime, gas-liquid separator, barometric pipe and sour pump inlet pipeline; During half water thing wet process acid is produced, all serious fouling of two sections of washing of filter vacuum chamber and three sections of washing, washing lotion pipeline and lotion pumps inlet pipe and suction flange.The filtering system fouling seriously just must snaking by per 6,7 days once, sometimes in addition per 2,3 order of classes or grades at school just must snaking once, frequent cleaning has seriously hindered normally carrying out of producing, and brings very big financial loss to factory.Therefore research and develop the Wet-process Phosphoric Acid Production mitigation and antiscaling technology and continue normal production run, enhance productivity and reduce the Wet-process Phosphoric Acid Production cost, improve the plant produced environment and all have active operation significance and using value realizing phosphoric acid by wet process.
Foulant is an insoluble worldwide problem in the Wet-process Phosphoric Acid Production process.At present domestic dealing with problems mainly is to adopt the physics method, and purpose is to reduce the degree of supersaturation of foulant and the interface enthalpy of wall, and concrete grammar is tetrafluoroethylene hydrophobic material or slim polypropylene material as changing easy fouling pipeline material; To the cross gas plate heat tracing or directly feed small amount of steam and heat; Suitably reduce and acid concentration and extraction tank service temperature and improve wash water temperature etc.The employing physics method that offshore company has as changing easy fouling pipeline into the electropolishing steel pipe, is magnetized processing to eliminate its degree of supersaturation etc. to phosphoric acid material pulp.Studies show that alkali metal oxide content is the principal element that influences system's fouling in the phosphorus ore.Generally speaking, (Na in the ore deposit
2O+K
2O)/P
2O
5Greater than 0.05, and K
2O content is greater than Na
2O content, then the foulant main component is K
2SiF
6, K
2SiF
6, Na
2SiF
6With a small amount of CaSO
42H
2If O is (Na
2O+K
2O)/P
2O
5Lower, be about 0.01, then the foulant main component is CaSO
42H
2O.The employing chemical method that has, (the laboratory scale inhibition performance is about 40%, and mainly to Ca adopt to add tensio-active agent and phosphoric acid salt sequestrant chelating foulant as Britain Fei Sensi company
2+, Mg
2+Carry out chelating), USSR (Union of Soviet Socialist Republics) adopts methods such as ion exchange resin and inorganic acid solution washing precipitation to carry out scale inhibition.The formation of foulant and phosphorus ore component and content have very big relation in the Wet-process Phosphoric Acid Production, because phosphorus ore geology formation condition difference, countries in the world all are to carry out scale inhibition research according to self phosphor resource characteristic, form more complete theory and eurytropy technology so far yet.
Summary of the invention
The present invention is directed to the problems referred to above that existing phosphoric acid by wet process prior art exists, and a kind of anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production is provided, the preparation method is simple for this anti-incrustation corrosion inhibitor, not only has good corrosion inhibitive function, and has scale-inhibiting properties efficiently.
A kind of anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production, material by the following meter of percentage ratio is by weight formed, and it is characterized in that: the mixture that nitrate 60～80%, dodecane sulfonate 10～20% and diethylenetriamine pentamethylene phosphonic acids 10～20% are formed.
Described nitrate is SODIUMNITRATE, saltpetre or ammonium nitrate.
Described dodecane sulfonate is sodium laurylsulfonate or dodecyl sodium sulfonate potassium.
Described diethylenetriamine pentamethylene phosphonic acids is the market industrial goods.
The present invention has following advantage: the preparation method is simple to operate, and is easy to use, and the anti-incrustation corrosion inhibitor that makes has good scale inhibitor effect in Wet-process Phosphoric Acid Production, and the back segment operation is had no effect, and has good application prospects.
In order to confirm anti-incrustation corrosion inhibitor performance of the present invention, be example with the Yunnan Wet-process Phosphoric Acid Production, use anti-incrustation corrosion inhibitor of the present invention after, scale inhibition performance is 89%, corrosion inhibition rate is 95%.
Embodiment
The invention will be further described in conjunction with the embodiments.
Example 1
By weight percentage, the mixture that anti-incrustation corrosion inhibitor is made up of the diethylenetriamine pentamethylene phosphonic acids of 80% ammonium nitrate, 10% sodium laurylsulfonate and 10%, originally the anti-incrustation corrosion inhibitor that makes is placed in 1 premium on currency, stir, according to foreign matter content in the Wet-process Phosphoric Acid Production to be processed be diluted to normal processing concentration (10～100ppm), obtain the anti-incrustation corrosion inhibitor of normal processing concentration.With the Yunnan Wet-process Phosphoric Acid Production is example, use anti-incrustation corrosion inhibitor of the present invention after, scale inhibition performance is 89%, corrosion inhibition rate is 95%.
Example 2
By weight percentage, the mixture that anti-incrustation corrosion inhibitor is made up of the diethylenetriamine pentamethylene phosphonic acids of 70% SODIUMNITRATE, 10% sodium laurylsulfonate and 20%, originally the efficient scale corrosion inhibitor that makes is placed in 1 premium on currency, stir, according to foreign matter content in the Wet-process Phosphoric Acid Production to be processed be diluted to normal processing concentration (10～100ppm), obtain the anti-incrustation corrosion inhibitor of normal processing concentration.With the Yunnan Wet-process Phosphoric Acid Production is example, use anti-incrustation corrosion inhibitor of the present invention after, scale inhibition performance is 89%, corrosion inhibition rate is 95%.
Example 3
By weight percentage, the mixture that saltpetre by 60%, 20% dodecyl sodium sulfonate potassium and 20% diethylenetriamine pentamethylene phosphonic acids are formed, originally the efficient scale corrosion inhibitor that makes is placed in 1 premium on currency, stir, according to foreign matter content in the Wet-process Phosphoric Acid Production to be processed be diluted to normal processing concentration (10～100ppm), obtain the anti-incrustation corrosion inhibitor of normal processing concentration.With the Yunnan Wet-process Phosphoric Acid Production is example, use anti-incrustation corrosion inhibitor of the present invention after, scale inhibition performance is 89%, corrosion inhibition rate is 95%.
Claims (3)
1. anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production, material by the following meter of percentage ratio is by weight formed, and it is characterized in that: the mixture that nitrate 60～80%, dodecane sulfonate 10～20% and diethylenetriamine pentamethylene phosphonic acids 10～20% are formed.
2. according to the described a kind of anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production of claim 1, it is characterized in that: described nitrate is SODIUMNITRATE, saltpetre or ammonium nitrate.
3. according to the described a kind of anti-incrustation corrosion inhibitor that is used for Wet-process Phosphoric Acid Production of claim 1, it is characterized in that: described dodecane sulfonate is sodium laurylsulfonate or dodecyl sodium sulfonate potassium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110112960A CN102241394B (en) | 2011-05-03 | 2011-05-03 | Scale and corrosion inhibitor used in wet phosphoric acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110112960A CN102241394B (en) | 2011-05-03 | 2011-05-03 | Scale and corrosion inhibitor used in wet phosphoric acid production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102241394A true CN102241394A (en) | 2011-11-16 |
| CN102241394B CN102241394B (en) | 2012-08-29 |
Family
ID=44959679
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|---|---|---|---|
| CN201110112960A Active CN102241394B (en) | 2011-05-03 | 2011-05-03 | Scale and corrosion inhibitor used in wet phosphoric acid production |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN105884051A (en) * | 2016-06-15 | 2016-08-24 | 武汉工程大学 | Sodium/potassium fluosilicate efficient scale inhibitor and preparation method thereof |
| CN106007014A (en) * | 2016-06-30 | 2016-10-12 | 云南磷化集团有限公司 | Wet-process phosphoric acid concentration scale inhibitor as well as preparation method and application thereof |
| US10759662B2 (en) | 2018-03-12 | 2020-09-01 | Solenis Technologies, L.P. | Systems and methods for reducing formation of scale in phosphoric acid production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324820A1 (en) * | 2008-06-30 | 2009-12-31 | Chartier Douglas M | Systems, Methods, and Compositions for the Inhibition of Corrosion of Metallic Surfaces |
-
2011
- 2011-05-03 CN CN201110112960A patent/CN102241394B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324820A1 (en) * | 2008-06-30 | 2009-12-31 | Chartier Douglas M | Systems, Methods, and Compositions for the Inhibition of Corrosion of Metallic Surfaces |
Non-Patent Citations (2)
| Title |
|---|
| 《工业水处理》 20040630 唐俊等 循环冷却水系统缓蚀剂的现状及绿色化进展 第1-5页 1-3 第24卷, 第6期 * |
| 《工业水处理》 20060430 贾丰春 工业循环冷却水阻垢剂研究现状与发展 第12-14页 1-3 第26卷, 第4期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102807288A (en) * | 2012-07-13 | 2012-12-05 | 湖北海力化工科技有限公司 | Scale inhibitor for limestone wet-process desulphurization and preparation method thereof |
| CN105884051A (en) * | 2016-06-15 | 2016-08-24 | 武汉工程大学 | Sodium/potassium fluosilicate efficient scale inhibitor and preparation method thereof |
| CN106007014A (en) * | 2016-06-30 | 2016-10-12 | 云南磷化集团有限公司 | Wet-process phosphoric acid concentration scale inhibitor as well as preparation method and application thereof |
| CN106007014B (en) * | 2016-06-30 | 2019-03-22 | 云南磷化集团有限公司 | A kind of wet-process phosphoric acid concentration antisludging agent and its preparation method and application |
| US10759662B2 (en) | 2018-03-12 | 2020-09-01 | Solenis Technologies, L.P. | Systems and methods for reducing formation of scale in phosphoric acid production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102241394B (en) | 2012-08-29 |
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