CN104445121A - Mono-ammonium phosphate produced by using wet process phosphoric acid and production method of mono-ammonium phosphate - Google Patents
Mono-ammonium phosphate produced by using wet process phosphoric acid and production method of mono-ammonium phosphate Download PDFInfo
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- CN104445121A CN104445121A CN201410673845.7A CN201410673845A CN104445121A CN 104445121 A CN104445121 A CN 104445121A CN 201410673845 A CN201410673845 A CN 201410673845A CN 104445121 A CN104445121 A CN 104445121A
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Abstract
The invention relates to the technical field of mono-ammonium phosphate prepared by using wet process phosphoric acid, and in particular to mono-ammonium phosphate produced by using wet process phosphoric acid and a production method of the mono-ammonium phosphate. When an ammonia gas is introduced or liquid ammonia is added into impurities in phosphoric acid prepared by using the wet process phosphoric acid, the neutralization in mixed liquor is adjusted to 0.5-0.8 to generate a large amount of precipitates from the impurities in the phosphoric acid, separation treatment is carried out by using a separator, after phosphoric acid with higher purity is obtained, the ammonia gas or the liquid ammonia is introduced in the phosphoric acid, and the pH value of the phosphoric acid is controlled to obtain mono-ammonium phosphate slurry with higher purity, so that the purity of a mono-ammonium phosphate product is improved and the total nutrient in the mono-ammonium phosphate is 60.15-60.36%, wherein counted by phosphorus pentoxide, the phosphorus content is 49.0-51.0%, the content of water soluble phosphorus is 47.62-48.15%, the nitrogen content is 9.0-11.0%, the fluorine content is 0.48-0.68%, the quality of the ammonium phosphate is improved, and the environmental pollution of the ammonium phosphate resulting from a fertilization effect is avoided.
Description
Technical field
The present invention relates to phosphoric acid by wet process and prepare monoammonium phosphate technical field, especially a kind of monoammonium phosphate and production method thereof utilizing Wet-process Phosphoric Acid Production.
Background technology
Monoammonium phosphate is a kind of efficient compound fertilizer except diammonium phosphate, because its nutrient is high, also has a wide range of applications in all kinds of plant fertilising.Along with agrotechnical development, the growth mechanism of people to plant has had more deep understanding, requires also more and more higher to the fertilizer efficiency of fertilizer and foreign matter content.Requirement at present for the water-soluble phosphorus in monoammonium phosphate is account for total phosphorus more than 90%, must not be higher than 1% to the requirement of Oil repellent.And in the technique of traditional employing Wet-process Phosphoric Acid Production monoammonium phosphate, it is direct with phosphoric acid by wet process and ammonia react, total nutrient is regulated by the mol ratio controlling ammonia and phosphoric acid, and then impurity in phosphoric acid by wet process is all entered in product, cause the total nutrient of product, the foreign matter content such as water-soluble phosphorus and fluorine is difficult to control, and cannot meet the need of market.
And the Oil repellent existed in monoammonium phosphate is higher, the use range of fertilizer is made to be subject to limitation, in use simultaneously, due to the existence of Determination of Multi-Impurities, make Fertilization Effect and the theoretical impact brought to crop of wooden barrel short slab comparatively obviously, result in crop growth environment and be subject to serious pollution, for this reason, this investigator, by long-term Exploration & stu dy, by adopting the technique of Wet-process Phosphoric Acid Production monoammonium phosphate product to provide a kind of new selection, reduces the production cost of monoammonium phosphate product.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of monoammonium phosphate utilizing Wet-process Phosphoric Acid Production, having total nutrient is 60.15-60.36%, wherein, the content of water-soluble phosphorus is 47.62-48.15%, nitrogen content is 9.0-11.0%%, and Oil repellent is the feature of 0.48-0.68%.
Another object of the present invention is to provide a kind of production method utilizing the monoammonium phosphate of Wet-process Phosphoric Acid Production, the method by preparation technology to the amount of the ammonia passed into and the control of pH value and adjustment, and then a large amount of impurity in the phosphoric acid making wet process phosphoric acid for preparing phosphoric acid obtain are removed, and then improve purity and the total nutrient content of the monoammonium phosphate product that phosphoric acid by wet process obtains, simultaneously, in making processes, reduce the Oil repellent in monoammonium phosphate product, make Oil repellent lower than 0.7%.
Be achieved particular by following technical scheme:
Utilize a monoammonium phosphate for Wet-process Phosphoric Acid Production, the Oil repellent of this monoammonium phosphate is 0.48-0.68%.
The total nutrient of described monoammonium phosphate is 60.15-60.36%, and wherein phosphorus content is in Vanadium Pentoxide in FLAKES, and content is 49.0-51.0%, in phosphorus content, the content of water-soluble phosphorus is 47.62-48.15%, and nitrogen content is 9.0-11.0%%, and Oil repellent is 0.48-0.68%.
The total nutrient of described monoammonium phosphate is 60.23%, and wherein phosphorus content is in Vanadium Pentoxide in FLAKES, and content is 50.10%, and in phosphorus content, the content of water-soluble phosphorus is 48.03%, and nitrogen content is 10.13%, and Oil repellent is 0.53%.
This utilizes the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production, comprises the following steps:
(1) pre-neutralization: phosphoric acid is placed in pre-neutralization groove, pass into ammonia wherein, and take to pass into while the mode stirred passes into, stirring velocity during stirring is 30-50r/min, when the mol ratio of the ammonia passed into and phosphoric acid is 0.5-0.7, continue to maintain stirring velocity stir process 20-30min, and hyperthermic treatment is carried out to pre-neutralization groove, heat-up rate is 0.3-0.6 DEG C/min hyperthermic treatment, and detect the pH value of mixed solution in pre-neutralization groove, treat that pH value reaches 0.5-0.8, stop hyperthermic treatment, obtain solidliquid mixture, stand-by;
(2) being separated: by step 1) solidliquid mixture that obtains is placed in separating centrifuge and carries out centrifugation, the rotating speed of separating centrifuge is 3000-4000r/min, after centrifugation 20-30min, obtains solid and liquid, solid is transported to compound fertilizer production technology, and liquid is stand-by;
(3) again neutralize: liquid is placed in tempering tank, and continue to pass into ammonia in tempering tank, and take to pass into while the mode stirred is carried out, stirring velocity is 30-50r/min, the mol ratio waiting to pass into ammonia and phosphoric acid to solution is 0.98-1.05, adjustment pH value is 4.2-4.6, obtains monoammonium phosphate slip, stand-by:
(4) granulation: by step 3) the monoammonium phosphate slip pump that obtains in tablets press, makes monoammonium phosphate slip in tablets press, carry out sprinkling granulation process by pipeline extracting, obtains monoammonium phosphate just finished product, stand-by;
(5) dry: by step 4) monoammonium phosphate that obtains just finished product be placed in moisture eliminator, adopts the temperature drying treatment 30-40s of 90 DEG C, acquisition finished product monoammonium phosphate.
Described phosphoric acid is the one in the phosphoric acid that obtains of phosphoric acid, decomposing phosphate rock by chlorhydric acid that phosphoric acid, decomposing phosphorite by using nitric acid that sulfuric acid decomposition phosphorus ore obtains obtain.
In described separating step, separating centrifuge can also replace by the one in pressure filter or hypergravity filter.
Described ammonia can also replace with liquefied ammonia.
Compared with prior art, technique effect of the present invention is embodied in:
1. by the impurity in the phosphoric acid that obtains phosphoric acid by wet process when passing into ammonia or adding liquefied ammonia, when degree of neutralization in adjustment mixed solution is 0.5-0.8, and then cause the impurity in phosphoric acid to obtain a large amount of precipitations, and then carry out separating treatment by separating machine, after obtaining the higher phosphoric acid of purity, pass into ammonia or liquefied ammonia wherein again, and control its pH value, and then obtain the higher slip of monoammonium phosphate purity, and then improve the purity of monoammonium phosphate product, the total nutrient in monoammonium phosphate is made to be 60.15-60.36%, wherein phosphorus content is in Vanadium Pentoxide in FLAKES, content is 49.0-51.0%, in phosphorus content, the content of water-soluble phosphorus is 47.62-48.15%, nitrogen content is 9.0-11.0%%, Oil repellent is 0.48-0.68%, improve the quality of monoammonium phosphate, Fertilization Effect is avoided to make monoammonium phosphate bring the phenomenon of pollution to environment.
2. by adjustment and the control of above-mentioned technique in monoammonium phosphate production process, and then make to have obtained largely improvement to purifying phosphoric acid and the Oil repellent reduced in monoammonium phosphate, improve the quality of monoammonium phosphate as crop fertilizer.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
The present invention fully analyzes the composition of phosphoric acid by wet process, and in phosphoric acid in the foreign ion such as fluorine, magnesium, aluminium, iron and ammonia react process, under degree of neutralization is 0.5-0.8 condition, reaction generates different complex compounds.Utilize complex compound to be difficult to the physical properties of dissolving, realize solid-liquor separation, solid phase is used for the production of composite fertilizer, and liquid phase ammonification Two-step neutralization, obtains the high-quality monoammonium phosphate of high water-soluble phosphorus low fluorine content.
Embodiment 1
Utilize a monoammonium phosphate for Wet-process Phosphoric Acid Production, the Oil repellent of this monoammonium phosphate is 0.53%.
This utilizes the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production, comprises the following steps:
(1) pre-neutralization: phosphoric acid is placed in pre-neutralization groove, pass into ammonia wherein, and take to pass into while the mode stirred passes into, stirring velocity during stirring is 30r/min, when the mol ratio of the ammonia passed into and phosphoric acid is 0.5, continue to maintain stirring velocity stir process 20min, and hyperthermic treatment is carried out to pre-neutralization groove, heat-up rate is 0.3 DEG C/min hyperthermic treatment, and detect the pH value of mixed solution in pre-neutralization groove, treat that pH value reaches 0.5, stop hyperthermic treatment, obtain solidliquid mixture, stand-by;
(2) being separated: by step 1) solidliquid mixture that obtains is placed in separating centrifuge and carries out centrifugation, the rotating speed of separating centrifuge is 3000r/min, after centrifugation 20min, obtains solid and liquid, solid is transported to compound fertilizer production technology, and liquid is stand-by;
(3) again neutralize: liquid is placed in tempering tank, and continue to pass into ammonia in tempering tank, and take to pass into while the mode stirred is carried out, stirring velocity is 30r/min, the mol ratio waiting to pass into ammonia and phosphoric acid to solution is 0.98, adjustment pH value is 4.2, obtains monoammonium phosphate slip, stand-by:
(4) granulation: by step 3) the monoammonium phosphate slip pump that obtains in tablets press, makes monoammonium phosphate slip in tablets press, carry out sprinkling granulation process by pipeline extracting, obtains monoammonium phosphate just finished product, stand-by;
(5) dry: by step 4) monoammonium phosphate that obtains just finished product be placed in moisture eliminator, adopts the temperature drying treatment 30s of 90 DEG C, acquisition finished product monoammonium phosphate.
Described phosphoric acid is the phosphoric acid that sulfuric acid decomposition phosphorus ore obtains.
Detect monoammonium phosphate, its result is the total nutrient of described monoammonium phosphate is 60.23%, and wherein phosphorus content is in Vanadium Pentoxide in FLAKES, content is 50.10%, and in phosphorus content, the content of water-soluble phosphorus is 48.03%, nitrogen content is 10.13%, and Oil repellent is 0.53%.
Embodiment 2
Utilize a monoammonium phosphate for Wet-process Phosphoric Acid Production, the Oil repellent of this monoammonium phosphate is 0.48%.
This utilizes the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production, comprises the following steps:
(1) pre-neutralization: phosphoric acid is placed in pre-neutralization groove, pass into ammonia wherein, and take to pass into while the mode stirred passes into, stirring velocity during stirring is 50r/min, when the mol ratio of the ammonia passed into and phosphoric acid is 0.7, continue to maintain stirring velocity stir process 30min, and hyperthermic treatment is carried out to pre-neutralization groove, heat-up rate is 0.6 DEG C/min hyperthermic treatment, and detect the pH value of mixed solution in pre-neutralization groove, treat that pH value reaches 0.8, stop hyperthermic treatment, obtain solidliquid mixture, stand-by;
(2) being separated: by step 1) solidliquid mixture that obtains is placed in separating centrifuge and carries out centrifugation, the rotating speed of separating centrifuge is 4000r/min, after centrifugation 30min, obtains solid and liquid, solid is transported to compound fertilizer production technology, and liquid is stand-by;
(3) again neutralize: liquid is placed in tempering tank, and continue to pass into ammonia in tempering tank, and take to pass into while the mode stirred is carried out, stirring velocity is 50r/min, the mol ratio waiting to pass into ammonia and phosphoric acid to solution is 1.05, adjustment pH value is 4.6, obtains monoammonium phosphate slip, stand-by:
(4) granulation: by step 3) the monoammonium phosphate slip pump that obtains in tablets press, makes monoammonium phosphate slip in tablets press, carry out sprinkling granulation process by pipeline extracting, obtains monoammonium phosphate just finished product, stand-by;
(5) dry: by step 4) monoammonium phosphate that obtains just finished product be placed in moisture eliminator, adopts the temperature drying treatment 40s of 90 DEG C, acquisition finished product monoammonium phosphate.
Described phosphoric acid is the phosphoric acid that decomposing phosphorite by using nitric acid obtains.
Detect monoammonium phosphate, can draw: total nutrient is 60.15%, and wherein phosphorus content is in Vanadium Pentoxide in FLAKES, content is 50.06%, and in phosphorus content, the content of water-soluble phosphorus is 47.62%, and nitrogen content is 10.09%, and Oil repellent is 0.48%.
Embodiment 3
Utilize a monoammonium phosphate for Wet-process Phosphoric Acid Production, the Oil repellent of this monoammonium phosphate is 0.68%.
This utilizes the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production, comprises the following steps:
(1) pre-neutralization: phosphoric acid is placed in pre-neutralization groove, pass into ammonia wherein, and take to pass into while the mode stirred passes into, stirring velocity during stirring is 40r/min, when the mol ratio of the ammonia passed into and phosphoric acid is 0.6, continue to maintain stirring velocity stir process 25min, and hyperthermic treatment is carried out to pre-neutralization groove, heat-up rate is 0.5 DEG C/min hyperthermic treatment, and detect the pH value of mixed solution in pre-neutralization groove, treat that pH value reaches 0.7, stop hyperthermic treatment, obtain solidliquid mixture, stand-by;
(2) being separated: by step 1) solidliquid mixture that obtains is placed in separating centrifuge and carries out centrifugation, the rotating speed of separating centrifuge is 3500r/min, after centrifugation 25min, obtains solid and liquid, solid is transported to compound fertilizer production technology, and liquid is stand-by;
(3) again neutralize: liquid is placed in tempering tank, and continue to pass into ammonia in tempering tank, and take to pass into while the mode stirred is carried out, stirring velocity is 40r/min, the mol ratio waiting to pass into ammonia and phosphoric acid to solution is 0.99, adjustment pH value is 4.4, obtains monoammonium phosphate slip, stand-by:
(4) granulation: by step 3) the monoammonium phosphate slip pump that obtains in tablets press, makes monoammonium phosphate slip in tablets press, carry out sprinkling granulation process by pipeline extracting, obtains monoammonium phosphate just finished product, stand-by;
(5) dry: by step 4) monoammonium phosphate that obtains just finished product be placed in moisture eliminator, adopts the temperature drying treatment 35s of 90 DEG C, acquisition finished product monoammonium phosphate.
Described phosphoric acid is the phosphoric acid that decomposing phosphate rock by chlorhydric acid obtains.
Detect monoammonium phosphate, its result is: total nutrient is 60.36%, and wherein phosphorus content is in Vanadium Pentoxide in FLAKES, and content is 50.16%, and in phosphorus content, the content of water-soluble phosphorus is 48.15%, and nitrogen content is 10.2%, and Oil repellent is 0.68%.
Embodiment 4
On the basis of embodiment 1, other are all with embodiment 1, a kind of production method utilizing the monoammonium phosphate of Wet-process Phosphoric Acid Production, and in described separating step, separating centrifuge can also replace with pressure filter.
Embodiment 5
On the basis of embodiment 2, other are all with embodiment 2, a kind of production method utilizing the monoammonium phosphate of Wet-process Phosphoric Acid Production, and in described separating step, separating centrifuge can also replace with hypergravity filter.
Embodiment 6
On the basis of embodiment 3, other are all with embodiment 3, a kind of production method utilizing the monoammonium phosphate of Wet-process Phosphoric Acid Production, and described ammonia can also replace with liquefied ammonia.
It is important to point out at this; above embodiment is only limitted to make further explanation technical scheme of the present invention; it is not the further restriction to technical scheme of the present invention; the essential characteristics of the non-protruding that those skilled in the art make on this basis and the improvement of non-significant progress, all belong to protection category of the present invention.
Claims (8)
1. utilize a monoammonium phosphate for Wet-process Phosphoric Acid Production, it is characterized in that, the Oil repellent of this monoammonium phosphate is 0.48-0.68%.
2. utilize the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 1, it is characterized in that, the Oil repellent of this monoammonium phosphate is 0.53%.
3. utilize the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 1, it is characterized in that, the total nutrient of described monoammonium phosphate is 60.15-60.36%, wherein phosphorus content is in Vanadium Pentoxide in FLAKES, content is 49.0-51.0%, and in phosphorus content, the content of water-soluble phosphorus is 47.62-48.15%, nitrogen content is 9.0-11.0%%, and Oil repellent is 0.48-0.68%.
4. utilize the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 2 or claim 3, it is characterized in that, the total nutrient of described monoammonium phosphate is 60.23%, wherein phosphorus content is in Vanadium Pentoxide in FLAKES, content is 50.10%, and in phosphorus content, the content of water-soluble phosphorus is 48.03%, nitrogen content is 10.13%, and Oil repellent is 0.53%.
5. utilize the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 1, it is characterized in that, comprise the following steps:
(1) pre-neutralization: phosphoric acid is placed in pre-neutralization groove, pass into ammonia wherein, and take to pass into while the mode stirred passes into, stirring velocity during stirring is 30-50r/min, when the mol ratio of the ammonia passed into and phosphoric acid is 0.5-0.7, continue to maintain stirring velocity stir process 20-30min, and hyperthermic treatment is carried out to pre-neutralization groove, heat-up rate is 0.3-0.6 DEG C/min hyperthermic treatment, and detect the pH value of mixed solution in pre-neutralization groove, treat that pH value reaches 0.5-0.8, stop hyperthermic treatment, obtain solidliquid mixture, stand-by;
(2) being separated: by step 1) solidliquid mixture that obtains is placed in separating centrifuge and carries out centrifugation, the rotating speed of separating centrifuge is 3000-4000r/min, after centrifugation 20-30min, obtains solid and liquid, solid is transported to compound fertilizer production technology, and liquid is stand-by;
(3) again neutralize: liquid is placed in tempering tank, and continue to pass into ammonia in tempering tank, and take to pass into while the mode stirred is carried out, stirring velocity is 30-50r/min, the mol ratio waiting to pass into ammonia and phosphoric acid to solution is 0.98-1.05, adjustment pH value is 4.2-4.6, obtains monoammonium phosphate slip, stand-by:
(4) granulation: by step 3) the monoammonium phosphate slip pump that obtains in tablets press, makes monoammonium phosphate slip in tablets press, carry out sprinkling granulation process by pipeline extracting, obtains monoammonium phosphate just finished product, stand-by;
(5) dry: by step 4) monoammonium phosphate that obtains just finished product be placed in moisture eliminator, adopts the temperature drying treatment 30-40s of 90 DEG C, acquisition finished product monoammonium phosphate.
6. utilize the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 5, it is characterized in that, described phosphoric acid is the one in the phosphoric acid that obtains of phosphoric acid, decomposing phosphate rock by chlorhydric acid that phosphoric acid, decomposing phosphorite by using nitric acid that sulfuric acid decomposition phosphorus ore obtains obtain.
7. utilize the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production as claimed in claim 5, it is characterized in that, in described separating step, separating centrifuge can also replace by the one in pressure filter or hypergravity filter.
8. utilize the production method of the monoammonium phosphate of Wet-process Phosphoric Acid Production as claim 5, it is characterized in that, described ammonia can also replace with liquefied ammonia.
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| CN105084333A (en) * | 2015-08-17 | 2015-11-25 | 湖北楚星化工股份有限公司 | Production process of granulated mono ammonium phosphate (GMAP) |
| CN105540562A (en) * | 2015-12-30 | 2016-05-04 | 川恒生态科技有限公司 | Method for directly producing high-nutrition monoammonium phosphate from hemi-hydrate process wet process phosphoric acid |
| CN106744763A (en) * | 2017-02-14 | 2017-05-31 | 瓮福（集团）有限责任公司 | The method that powdery monoammonium phosphate is produced with phosphoric acid by wet process " step " |
| CN107200315A (en) * | 2017-06-28 | 2017-09-26 | 四川省高宇化工有限公司 | Method and device based on the Wet-process Phosphoric Acid Production MAP repeatedly neutralized |
| CN108751152A (en) * | 2018-05-30 | 2018-11-06 | 湖北三宁化工股份有限公司 | The method for improving the pH value of the industrial monoammonium phosphate of Wet-process Phosphoric Acid Production |
| CN110844897A (en) * | 2019-12-13 | 2020-02-28 | 中山市中环环保废液回收有限公司 | Waste phosphoric acid treatment method and flow line treatment line |
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| CN110844897B (en) * | 2019-12-13 | 2023-08-29 | 中山市中环环保废液回收有限公司 | Treatment method of waste phosphoric acid on running water treatment line |
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