CN104495772A - Compound decolorant and application thereof - Google Patents
Compound decolorant and application thereof Download PDFInfo
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- CN104495772A CN104495772A CN201410855525.3A CN201410855525A CN104495772A CN 104495772 A CN104495772 A CN 104495772A CN 201410855525 A CN201410855525 A CN 201410855525A CN 104495772 A CN104495772 A CN 104495772A
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- phosphoric acid
- discoloring agent
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- ethamine
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Abstract
The invention discloses a compound decolorant and an application thereof. The compound decolorant is applied to a phosphoric acid production system and can achieve a good decoloration effect. The decolorant is an aqueous solution prepared by mixing polypropylene ethylamine and aluminum potassium sulfate dodecahydrate according to a specific content ratio, is applied to a wet method phosphoric acid production system, and achieves an effective decoloration effect on a phosphoric acid crude product to ensure that the original color of phosphoric acid cannot be changed due to the existence of metallic ions. Meanwhile, by adopting the compound decolorant for decoloration, the adding operation is simple and convenient, the addition amount is small, the cost is low, a colorless and transparent or yellowish phosphoric acid product can be obtained, other properties of phosphoric acid are not influenced at all, and product requirements of phosphoric acid are met.
Description
Technical field
The present invention relates to discoloring agent field, particularly relate to a kind of compound discoloring agent and application thereof.
Background technology
Phosphorous chemical industry is that raw material is through the obtained various phosphorous goods of physical chemistry processing with Rock Phosphate (72Min BPL).Phosphorous chemical industry enterprise is in the production process of phosphoric acid, and the color of phosphoric acid changes along with the colour-change of phosphorus ore, and phosphoric acid is that the derived product that raw material production obtains mostly is black or Dark grey so in a wet process, has a strong impact on the exterior quality of product.As with phosphoric acid by wet process direct production two ammonium, then can only two ammonium products of production grey or Dark grey, the requirement of user to product appearance can not be met.Larger to the demand of yellow ammonium phosphate product on current China's phosphorus ammonium market, need to decolour to it with Wet-process Phosphoric Acid Production phosphorus ammonium, traditional discoloring agent is adopted in phosphoric acid production system, decolorizing effect is not good, just not there is look, the situation that color distribution is uneven, can not meet the requirement of its derived product to color.
Summary of the invention
In view of this, the invention provides a kind of compound discoloring agent and application thereof.Described discoloring agent is applied in Wet-process Phosphoric Acid Production system, decolours to product, makes phosphoric acid can not change its inherent color because of the existence of metal ion, plays good decolorizing effect.
For solving above technical problem, the technical scheme of the first aspect that the application provides is for adopting a kind of compound discoloring agent, the aqueous solution that described discoloring agent is made up of polypropylene ethamine, 12 hydrazine aluminum sulfate potassium, and the mass percent of each component is:
Polypropylene ethamine: 1.5%-4.2%;
12 hydrazine aluminum sulfate potassium: 0.5%-0.8%;
All the other are water, and discoloring agent total mass meets 100%.
Preferably, the mass ratio of described polypropylene ethamine and described 12 hydrazine aluminum sulfate potassium is 3:1-5:1.
The application also provides the technical scheme of second aspect, and namely aforementioned arbitrary compound discoloring agent is in the application in Wet-process Phosphoric Acid Production.
Preferably, described compound discoloring agent is used for the decolouring of Wet-process Phosphoric Acid Production phosphoric acid first product.
Preferably, above-mentioned application comprises the following steps:
(1) by component polypropylenes ethamine and the mixing of 12 hydrazine aluminum sulfate potassium, add water in ratio described in claim 1-2 and carry out the obtained described discoloring agent of mixing;
(2) discoloring agent of step (1) gained is joined in the reaction slurry in Wet-process Phosphoric Acid Production system, product is decoloured.
Preferably, the product in described step (2) is dilute phosphoric acid or strong phosphoric acid.
Preferably, the amount of the discoloring agent added in described step (2) is 0.2%-0.5% of product acid amount.
Preferably, the discoloring agent added in described step (2) stops 3-5 hour in production system.
Compared with prior art, the compound discoloring agent of the present invention mixes according to above-mentioned specific moiety and specific content ratio, be applied in Wet-process Phosphoric Acid Production system, effective decolorization is played to phosphoric acid first product, make phosphoric acid can not change its inherent color because of the existence of metal ion.Meanwhile, adopt this discoloring agent to decolour, add-on is few, and cost is low, can obtain water white transparency or flaxen phosphoric acid product and have no effect to other character of phosphoric acid, meeting its product requirement.
Embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with embodiment, the present invention is described in further detail.
The detailed process that compound discoloring agent described in the application is applied in Wet-process Phosphoric Acid Production system is as follows:
1, compound discoloring agent is used in prefabricated phosphoric acid decolouring.According to phosphoric acid production technique, get material, instrument needed for prefabricated discoloring agent ready, i.e. polypropylene ethamine, 12 hydrazine aluminum sulfate potassium, water, discoloring agent Preparation tank.The massfraction of described polypropylene ethamine, 12 hydrazine aluminum sulfate potassium, water is: polypropylene ethamine: 1.5%-4.2%, 12 hydrazine aluminum sulfate potassium: 0.5%-0.8%, all the other are water, its total mass meets 100% mixing, and wherein polypropylene ethamine is 3:1-5:1 with the mass ratio of poly-12 hydrazine aluminum sulfate potassium.Polypropylene ethamine, 12 hydrazine aluminum sulfate potassium, water are placed in Preparation tank, stir be mixed with 2%-5% the aqueous solution.
2, the discoloring agent made is joined in the reaction slurry in Wet-process Phosphoric Acid Production system, phosphoric acid product is decoloured.First, with pump, the discoloring agent made is driven into the material pump inlet of phosphoric acid production system, and then joins in slip, add discoloring agent amount account for 0.2%-0.5% of slip acid amount.Obtained solution is stopped in container and within 3-5 hours, decolours.
In concrete enforcement, to decolour as an application of the present invention to the production of phosphoric acid solution.
Control group 1-existing discoloring agent
Adopt existing discoloring agent, be applied in phosphoric acid solution decolouring.
Control group 2-polypropylene ethamine+ten two hydrazine aluminum sulfate potassium+water (non-the application's discoloring agent)
Adopt the discoloring agent that the application's polypropylene ethamine+ten two hydrazine aluminum sulfate potassium+water is made, wherein, the mass ratio of discoloring agent shared by each component, not within the application's scope, adopts aforementioned the application's mode to be applied in the production decolouring of phosphoric acid solution.
Experimental group 1-the application bleaching agent bleaching
Adopt the discoloring agent that the application's polypropylene ethamine+ten two hydrazine aluminum sulfate potassium+water is made, wherein, shared by each component, the mass ratio of discoloring agent is polypropylene ethamine: 1.5%-4.2%; 12 hydrazine aluminum sulfate potassium: 0.5%-0.8%; All the other are water, and its total mass meets 100%, and the mass ratio of polypropylene ethamine and 12 hydrazine aluminum sulfate potassium is 3:1-5:1, adopt aforementioned the application's mode to be applied in phosphoric acid solution decolouring.
Embodiment 1-decolorizing effect is tested
For the decolouring to phosphoric acid solution, test with above-mentioned control group 1-2 and experimental group 1 respectively.Obtained discoloring agent all adopts same mode to be prepared, and adopts same decolouring mode to decolour, and observe the color of product after decolouring, the data obtained list 1 is as follows:
Table 1-decolorizing effect experiment
| Experimental subjects | Control group 1 | Control group 2 | Experimental group 1 |
| Product colour | Dark grey | Light gray | Transparent or faint yellow |
The embodiment of the application is as follows:
Embodiment 1: the discoloring agent quality accounting mark of preparation is: polypropylene ethamine: 2.5%; 12 hydrazine aluminum sulfate potassium: 0.5%; All the other are water, and its total mass meets 100%, and during decolouring, the amount adding discoloring agent accounts for 0.2% of product acid amount.
Embodiment 2: the discoloring agent quality accounting mark of preparation is: polypropylene ethamine: 3.2%; 12 hydrazine aluminum sulfate potassium: 0.8%; All the other are water, and its total mass meets 100%, and during decolouring, the amount adding discoloring agent accounts for 0.3% of product acid amount.
Embodiment 3: the discoloring agent quality accounting mark of preparation is: polypropylene ethamine: 4.2%; 12 hydrazine aluminum sulfate potassium: 0.6%; All the other are water, and its total mass meets 100%, and during decolouring, the amount adding discoloring agent accounts for 0.5% of product acid amount.
Embodiment 4: the discoloring agent quality accounting mark of preparation is: polypropylene ethamine: 1.0%; 12 hydrazine aluminum sulfate potassium: 0.3%; All the other are water, and its total mass meets 100%, and during decolouring, the amount adding discoloring agent accounts for 0.4% of product acid amount.
Decolour for the production of phosphoric acid solution equally, adopt above-mentioned embodiment 1-4 to carry out desolventing technology.
Adopt aforementioned same mode to prepare discoloring agent, same mode is decoloured, and observe the color of the rear product of decolouring, the data obtained list 2 is as follows:
Table 2-the application's embodiment
| Embodiment | 1 | 2 | 3 | 4 |
| The color of product | Faint yellow | Transparent | Grey | Dark grey |
Interpretation:
As can be seen from Table 1, 2, the discoloring agent adopting the above-mentioned specific moiety of the application and specific content ratio to make is applied to the decolouring of phosphoric acid solution, can play good decolorizing effect.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a compound discoloring agent, is characterized in that: the aqueous solution that described discoloring agent is made up of polypropylene ethamine, 12 hydrazine aluminum sulfate potassium, and the mass percent of each component is:
Polypropylene ethamine: 1.5%-4.2%;
12 hydrazine aluminum sulfate potassium: 0.5%-0.8%;
All the other are water, and discoloring agent total mass meets 100%.
2. the compound discoloring agent of one according to claim 1, is characterized in that: the mass ratio of described polypropylene ethamine and described 12 hydrazine aluminum sulfate potassium is 3:1-5:1.
3. the compound discoloring agent described in claim 1-2, the application in Wet-process Phosphoric Acid Production.
4. application according to claim 3, is characterized in that: described compound discoloring agent is used for the decolouring of Wet-process Phosphoric Acid Production phosphoric acid first product.
5. application according to claim 4, is characterized in that: comprise the following steps:
(1) by component polypropylenes ethamine and the mixing of 12 hydrazine aluminum sulfate potassium, add water in ratio described in claim 1-2 and carry out the obtained described discoloring agent of mixing;
(2) discoloring agent of step (1) gained is joined in the reaction slurry in Wet-process Phosphoric Acid Production system, product is decoloured.
6. application according to claim 5, is characterized in that: the product in described step (2) is dilute phosphoric acid or strong phosphoric acid.
7. application according to claim 5, is characterized in that: the amount of the discoloring agent added in described step (2) is 0.2%-0.5% of product acid amount.
8. application according to claim 5, is characterized in that: the discoloring agent added in described step (2) stops 3-5 hour in production system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855525.3A CN104495772A (en) | 2014-12-31 | 2014-12-31 | Compound decolorant and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855525.3A CN104495772A (en) | 2014-12-31 | 2014-12-31 | Compound decolorant and application thereof |
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| Publication Number | Publication Date |
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| CN104495772A true CN104495772A (en) | 2015-04-08 |
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| CN201410855525.3A Pending CN104495772A (en) | 2014-12-31 | 2014-12-31 | Compound decolorant and application thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4808391A (en) * | 1987-05-01 | 1989-02-28 | Farmland Industries, Inc. | Oxidation-reduction process for enhancing the color of and stabilizing wet process phosphoric acid |
| AU3138289A (en) * | 1988-03-16 | 1989-09-21 | Rotem Fertilizers Ltd | Process for the removal of heavy metal ions from phosphoric acid |
| CN102557218A (en) * | 2011-12-19 | 2012-07-11 | 上海沃杉化工有限公司 | Composite flocculating agent containing various polyacrylamides and preparation method for composite flocculating agent |
| CN103242818A (en) * | 2013-05-03 | 2013-08-14 | 西南石油大学 | AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof |
| CN103253752A (en) * | 2013-05-29 | 2013-08-21 | 滁州友林科技发展有限公司 | High-efficiency flocculant |
-
2014
- 2014-12-31 CN CN201410855525.3A patent/CN104495772A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4808391A (en) * | 1987-05-01 | 1989-02-28 | Farmland Industries, Inc. | Oxidation-reduction process for enhancing the color of and stabilizing wet process phosphoric acid |
| AU3138289A (en) * | 1988-03-16 | 1989-09-21 | Rotem Fertilizers Ltd | Process for the removal of heavy metal ions from phosphoric acid |
| CN102557218A (en) * | 2011-12-19 | 2012-07-11 | 上海沃杉化工有限公司 | Composite flocculating agent containing various polyacrylamides and preparation method for composite flocculating agent |
| CN103242818A (en) * | 2013-05-03 | 2013-08-14 | 西南石油大学 | AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof |
| CN103253752A (en) * | 2013-05-29 | 2013-08-21 | 滁州友林科技发展有限公司 | High-efficiency flocculant |
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Application publication date: 20150408 |
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