CN101774559B - Phosphoric acid concentrated assistant - Google Patents
Phosphoric acid concentrated assistant Download PDFInfo
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- CN101774559B CN101774559B CN201010103405XA CN201010103405A CN101774559B CN 101774559 B CN101774559 B CN 101774559B CN 201010103405X A CN201010103405X A CN 201010103405XA CN 201010103405 A CN201010103405 A CN 201010103405A CN 101774559 B CN101774559 B CN 101774559B
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- phosphoric acid
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Abstract
The invention relates to a phosphoric acid concentrated assistant, which comprises the components by weight percent: 3-60 percent of tween 60, 8-15 percent of sodium naphthalenesulfonate, 3-8 percent of polyethyoxylethylene octylphenol ether, 2-8 percent of aminotrimethyl, 8-18 percent of beta-sodium naphthalenesulfonate formaldehyde condensate, 3-8 percent of hydroxyethylidenediphosphonic acid and the balance of water. The substances are dissolved in water, and then the water is heated to 50 DEG C and the temperature is kept for 1 hour to obtain the phosphoric acid concentrated assistant. The phosphoric acid concentrated assistant can have the function of improving the evaporation concentration efficiency, reducing energy consumption and stopping or delaying the scaling of equipment and pipelines when being used for the evaporation concentration process of phosphoric acid.
Description
Technical field
The present invention relates to a kind of phosphoric acid concentrated assistant, be mainly used in the evaporating and concentrating process of phosphoric acid.
Background technology
The concentrated of phosphoric acid is through the high-temperature water vapor heat exchange at present, and a part of moisture content that evaporates in the phosphoric acid improves concentration of phosphoric acid, in concentration process, will consume quite a few energy.Since the seventies in 20th century, because energy dilemma, phosphoric acid by wet process energy consumption, corrosion and scale formation are very serious.Therefore exploring new Phosphoric Acid Concentration method is of great practical significance.Low-grade during the phosphorus ore of China belongs to more, the gained phosphoric acid by wet process is impure more, and Phosphoric Acid Concentration equipment runs to the regular hour, and the silicofluoride in the phosphoric acid production will gather heat exchanger surface and form dirt, influences its heat exchange effect.General factory runs to about 15 days and just needs cleaning once, and concentrated acid output also can be restricted.Fouling is a bottleneck of phosphoric acid output, so phosphoric acid concentrated assistant also has the effect of scale inhibition, so more can embody its value.
Summary of the invention
The object of the invention is in order to overcome defective and the problem that above-mentioned prior art exists; And a kind of phosphoric acid concentrated assistant is provided; The evaporating and concentrating process that is used for phosphoric acid can play the effect that improves evaporation concentration efficient, cuts down the consumption of energy, stops or delay equipment and pipeline scale.
The present invention realizes through following technology:
A kind of phosphoric acid concentrated assistant, composed of the following components, each components based on weight percentage; It is characterized in that: polysorbate60: 3～5%, sodium naphthalene sulfonate: 8～15%, the sim alkylphenol Soxylat A 25-7 of oxyethyl group: 3～8%; ATMP: 2～8%, the sodium formaldehyde condensation products: 8～18%, hydroxy ethylene diphosphonic acid: 3～8%; All the other are water, with above-mentioned each substance dissolves in water, be warmed up to 50 ℃ after constant temperature obtained phosphoric acid concentrated assistant in 1 hour.
The phosphoric acid concentrated assistant that above-mentioned process is composite joins in the phosphoric acid liquid phase, because there is bigger copolymerization power in hydrogen bond, water has maximum surface tension in all liquid.When tensio-active agent added water, in order to reduce the energy of system, the molecule of organic products got into the surface of water, and hydrophilic radical is towards solution, and lipophilic group is towards air, and the surface covers for hydrophobic group.Because the copolymerization power of hydrogen carbon is less than water molecules, surface tension SFT reduces.Surface tension SFT reduces directly related with the kind of tensio-active agent.When same concentrations, have the tensio-active agent of the hydrophobic group of big hydrocarbon chain, SFT reduces more more.So the surface tension of water reduces, the force of cohesion that influences the liquid phase surface reduces, and moisture evaporation is impelled the boiling point lowering of phosphoric acid more easily, thereby the sensible heat of production process descends, thereby saves energy.And can be adsorbed on the crystal grain behind the ionizable one-tenth negatively charged ion of the organic phospho acid in the concentrated assistant, make it be dispersed and be suspended in the solution, can also be adsorbed on the contact surface of straining installation and pipeline simultaneously, form an adsorption layer.Adsorption layer can stop crystal grain in equipment and pipeline surface deposition; Can reduce the sticking power of settling and surface in contact again; Make settling can only form dirt layer loose, Abherent, be prone to rinsed out by flow, it is less scaling better to play protection equipment; Improve the vaporizer heat exchange efficiency, prolong the equipment life cycle.
Phosphonic acids concentrated assistant of the present invention has following comparatively outstanding feature: 1, this auxiliary agent preparation technology is simple, and raw material is easy to get, and is cheap; 2, auxiliary agent can directly make an addition to the dilute phosphoric acid transport pipe, can well disperse, and adds simple, convenient.3, auxiliary dosage is less, generally about 200ppm, gets final product, and can not produce detrimentally affect to the phosphoric acid quality.4, this concentrated assistant can be accelerated the velocity of evaporation of moisture content in the phosphoric acid, reduces the energy consumption of vaporizer, improves the vaporization efficiency more than 5%; And can reduce the viscosity of phosphoric acid in the follow-up enrichment process; Improve the throughput of whole device, increase the phosphoric acid continuous concentration cycle, prolong the production cycle more than 2 days.
Embodiment
Table 1 is the raw materials used and proportioning of embodiment of the invention 1-3.Weight percent meter %
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Polysorbate60 | 3 | 4 | 5 |
| Sodium naphthalene sulfonate | 15 | 10 | 8 |
| The sim alkylphenol Soxylat A 25-7 of oxyethyl group | 5 | 8 | 3 |
| ATMP | 8 | 2 | 5 |
| The sodium formaldehyde condensation products | 10 | 18 | 8 |
| Hydroxy ethylene diphosphonic acid | 3 | 5 | 8 |
| Water | 56 | 53 | 63 |
With above-mentioned each substance dissolves in water, be warmed up to 50 ℃ after constant temperature stir and to obtain phosphoric acid concentrated assistant in 1 hour, and the pH value of the aqueous solution is all less than 6.
With respectively with the phosphoric acid concentrated assistant of embodiment 1-3 gained in the evaporating and concentrating process of phosphoric acid, in the dilute phosphoric acid transport pipe, directly add phosphoric acid concentrated assistant of the present invention, consumption is 200ppm; Can not produce detrimentally affect to the phosphoric acid quality; This concentrated assistant can be accelerated the velocity of evaporation of moisture content in the phosphoric acid, reduces the energy consumption of vaporizer, can both improve the vaporization efficiency more than 5%; And can reduce the viscosity of phosphoric acid in the follow-up enrichment process; Improve the throughput of whole device, increase the phosphoric acid continuous concentration cycle, can both prolong the production cycle more than 2 days.
Case one:
The laboratory lab scale; In the dilute phosphoric acid of 26% concentration, adding the phosphoric acid evaporation auxiliary agent of 200ppm according to above-mentioned prescription; Same phosphoric acid amount 300g, 80 ℃ of temperature, same 0.09Mp pressure condition are measured its steam output down; Relatively phosphoric acid evaporation auxiliary agent is to the concentrated effect of phosphoric acid, measures after 30 minutes that respectively to investigate desired value following:
| Embodiment | Evaporate the water yield that | Boiling temperature | Evaporation back concentration | |
| 137.5 | 64℃ | 48.2％ | ||
| 135.5 | 63℃ | 47.5％ | ||
| 137 | 64℃ | 48％ | ||
| Do not add the evaporation auxiliary agent | 117 | 66℃ | 41％ |
Can find out that from data three Example formulations can both obviously improve phosphoric acid evaporation, the evaporation auxiliary agent can improve vaporization efficiency, reduces the energy expenditure in the evaporative process.
Yunnan phosphoric acid production producer, according to 3 different time cycles of 20 days of statistics, the contrast related data.
Adding behind the evaporation auxiliary agent output with respect to preceding two cycles on average promotes and is:
[15.368-(14.262+14.714)÷2]÷[(14.262+14.714)÷2]
＝6.07％
With respect to steam ton consumption decreased average behind preceding two cycles interpolation evaporation auxiliary agent be:
[(1.873+1.808)÷2-1.784]÷[(1.873+1.808)÷2]
＝3.07％
1, moisture more is prone to evaporation, can reduce the energy consumption of vaporizer, on average reduces by 3.07%.
2, vaporization efficiency improves, and SPA output increases, and on average increases production 6.07%.
3, the vapo(u)rization system minimizing that scabs, system's cleaning cycle elongates.
So this has evaporated the auxiliary agent verification experimental verification in the process of dilute phosphoric acid in evaporation concentration, adds certain evaporation auxiliary agent, helps improving the evaporation concentration effect, raises the efficiency.
Claims (1)
1. a phosphoric acid concentrated assistant is composed of the following components, each components based on weight percentage; It is characterized in that: polysorbate60: 3～5%, sodium naphthalene sulfonate: 8～15%, the sim alkylphenol Soxylat A 25-7 of oxyethyl group: 3～8%; ATMP: 2～8%, the sodium formaldehyde condensation products: 8～18%, hydroxy ethylene diphosphonic acid: 3～8%; All the other are water, with above-mentioned each substance dissolves in water, be warmed up to 50 ℃ after constant temperature obtained phosphoric acid concentrated assistant in 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010103405XA CN101774559B (en) | 2010-01-28 | 2010-01-28 | Phosphoric acid concentrated assistant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010103405XA CN101774559B (en) | 2010-01-28 | 2010-01-28 | Phosphoric acid concentrated assistant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101774559A CN101774559A (en) | 2010-07-14 |
| CN101774559B true CN101774559B (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010103405XA Active CN101774559B (en) | 2010-01-28 | 2010-01-28 | Phosphoric acid concentrated assistant |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101664625B1 (en) | 2014-12-24 | 2016-10-11 | 오씨아이 주식회사 | Purification of yellow phosphorus |
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