CN104291297A - Coproduction method for monopotassium phosphate and special compound fertilizer for radish - Google Patents
Coproduction method for monopotassium phosphate and special compound fertilizer for radish Download PDFInfo
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Abstract
The invention discloses a coproduction method for monopotassium phosphate coproduction and a special compound fertilizer for radish. The method comprises the following three steps: mixing and reacting raw materials, preparing monopotassium phosphate and preparing the special compound fertilizer for radish. The raw materials, temperature and element content are controlled, so that the filtrate for the special compound fertilizer for radish can be prepared, the compound fertilizer prepared by using the filtrate can meet the requirements of the radish on nutrient elements, the problem that soil environment pollution is caused by fertilizer residues is solved, and the compound fertilizer has high environment-friendly value and economic value.
Description
Technical field
The present invention relates to technical field of fertilizer, be specifically related to a kind of method preparing potassium primary phosphate coproduction radish composite fertilizer special.
Background technology
Radish, is divided into white turnip and Radix Dauci Sativae, Cruciferae 2 years or annual herb plant, and rhizome vegetable, has another name called radish, Root of Panicled Fameflower.Chao-Shan Area claims dish head.High 20-100 centimetre, root carnification, Long Circle, spherical or conical.All there is cultivation all over China.Radish varieties is extremely many.Root can be done vegetables and eat; Seed, fresh, withered, Ye Jieke is used as medicine: seed eliminates indigestion and phlegm; Fresh quench the thirst, aid digestion, withered defaecation; Ye Zhi is dysentery just, can prevent dysentery; Seed can be industrial and edible, medicinal for oil expression.
Radish stem is upright, and sturdy, cylindrical, hollow, from base portion branch.Basal leaf and the lower portion of the stem leaf have long handle, usual major part pinnation, and by coarse wool, side sliver 1 ~ 3 is right, and there is sawtooth at edge or incises; In stem, upper leaf Long Circle to lanceolar, upwards gradual change is little, does not split or slightly divides, and does not embrace stem.Raceme, top is raw and armpit is raw.Spend rose pink or white.Silique, does not ftracture, closely conical, straight or slightly curved, hangs and shortens beading into, the long beak of tip tool between seed, long 2,5 ~ 5 centimetres of beak, fruit wall spongioplasm.1 ~ 6, seed, sorrel, circular, there is fine-structure mesh line.Originate in China, all there is cultivation various places, and kind is extremely many, and common have Radix Dauci Sativae, green turnip, white turnip, summer radish and red flesh etc.Because in radish, water content is more, so deeply like by everybody.Root is edible, and be one of China's vegetables, seed oil-containing 42%, can be used for soap system or make lubricating oil.Seed, fresh, Ye Junke is used as medicine, under function, gas disappears long-pending.Be divided into dish to use by purposes, processing is used, fruit is used.By divide season can be divided into autumn and winter radish, Winter-Spring radish, Spring Summer Radish, the summer autumn radish, summer and winter radish, the plantation of radish be unable to do without fertilizer, common fertilizer is after arable land applies, a part is rising, dissipation and outflowing with water, a part is fixed by soil and soil microorganisms and is utilized, and only has the just absorbed by crops and utilization of a part wherein.Show after deliberation: the utilization ratio of urea, carbon ammonium is 20% one 46%, phosphate fertilizer (two ammoniums, an ammonium, coarse whiting) is 10% one 25%, potash fertilizer 45% one 60%.As can be seen here, common fertilizer utilization ratio is very low.For this reason, the present inventor is for the feature of radish and a kind of method preparing fertilizer special for turnip of the fertile characteristic research of happiness, need in a growth cycle of radish to absorb more nutritive substance, being not only nitrogen that common fertilizer provides, phosphorus, potassium, as lacked other nutrients, just can not growing by normal growth, plant slight of stature, ear uneven, pollination rate is low, has a strong impact on output.The present invention is the synthesis containing multiple nutrient, not the chemical fertilizer that nutrient is single, it is also rich in the required element of the crops such as calcium, iron, boron except the macronutrient such as nitrogenous, phosphorus, potassium, serving the effect regulating soil balanced nutrients, is a kind of new and effective no-pollution full nutrition chelating dedicated fertilizer.This special fertilizer be grow normally according to radish, cultivation feature, irrigate habit, prepared by the nutritive element of needs.Add various nutrient elements, protection radish is healthy, and fertility is more lasting, and effective regulating plant body defensive ability/resistance ability, alleviates disease, improves output.Greatly improve crop quality, improve the immunizing power of radish self, can well prevent radish regular incidence.
Potassium primary phosphate, agriculturally be used as efficient phosphorus potassium complex fertilizer, be widely used in the crop of the almost all types such as all types of cash crop, grain, melon and fruit, vegetables, there is remarkable increasing both production and income, the amount of changing optimizes many excellent effects such as quality, resistant to lodging, disease and insect resistance, control early ageing, and have and overcome the aging receptivity of plant growth later stage root system and decline and the malnourished effect that causes.The production method of potassium primary phosphate is a lot, is roughly summarised as neutralisation, extraction process, ion exchange method, double decomposition, direct method, crystallization process and electrolytic process etc.In China, production technique many employings neutralisation, secondly also has organic extraction, double decomposition, ion exchange method.
As the publication number patent document that is CN100999312A discloses the coproduction side of a kind of potassium primary phosphate, S-based compound fertilizer and polymerize aluminum chloride, not only solve the impurity interference problem that phosphoric acid by wet process prepares potassium primary phosphate, and can also the free from chloride S-based compound fertilizer of by-product, coproducing polymerized aluminum chloride simultaneously, raw material availability is high, improves economic benefit.
Preparing potassium primary phosphate at present, also to there is product purity low, impurity is many, equipment requirements is high, the problems such as disposing mother liquor is difficult, and the problem of fertilization of radish mainly appears at unevenness of application, residual many, cause environmental pollution etc., present inventor is by a large amount of experiments and research, and exploring a kind of purity that can improve potassium primary phosphate again can the method for coproduction radish composite fertilizer special.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of preparation method preparing potassium primary phosphate coproduction radish composite fertilizer special, it has, and environmental pollution is low, equipment requirements is low, production cost is low, potassium dihydrogen phosphate product purity advantages of higher, and the radish composite fertilizer special of by-product fully can be absorbed by radish, composite fertilizer's nutritive element collocation is proper, has certain value of environmental protection and economic worth.
The present invention is achieved by the following technical programs:
1, a kind of method preparing potassium primary phosphate coproduction radish composite fertilizer special, with urea and phosphoric acid in molar ratio 1:1.4-1.6 mix, temperature is risen to 100-109 DEG C, stirring reaction 2.5h, separation obtains intermediate, by intermediate and alkaline potassium hybrid reaction, control pH value is 3.3-3.8, obtain containing nitrogen after reaction terminates, phosphorus, the mother liquor of potassium, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15-16.5%, phosphorus pentoxide content is 7-8%, when potassium oxide content is 8.1-8.9%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate, then in the filtrate obtained, add the element needed for radish, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product.
Specifically comprise the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.4-1.5 mix, and temperature is risen to 100-108 DEG C, and stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and alkaline potassium hybrid reaction, control pH value is 3.3-3.7, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15-16.4%, phosphorus pentoxide content is 7-7.9%, when potassium oxide content is 8.1-8.8%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add element needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
The reaction of described urea and phosphoric acid is that urea solid and phosphoric acid solution react.
The concentration of described phosphoric acid is 65-69%.
Described alkaline potassium is potassium hydroxide.
The cooling temperature of described crystallisation by cooling is 24 DEG C.
Element needed for described radish is calcium, iron, boron.
Described radish composite fertilizer special is chemical combination state Chemical Mixed Fertilizer.
Described chemical combination state Chemical Mixed Fertilizer, containing following N P and K chemical combination state structural formula in its composition:
wherein, the dotted line between carbon atom and Sauerstoffatom represents to there is coordinate bond between C atom and O atom.
Beneficial effect of the present invention is: prepare potassium primary phosphate by phosphoric acid and urea reaction, make the potassium dihydrogen phosphate product purity of output high, compensate for conventional wet phosphoric acid when preparing potassium primary phosphate, the problem of impurity treatment difficulty, reduce production cost, and in the process preparing potassium primary phosphate, by to raw material, temperature, the control of constituent content, obtain the filtrate that can be prepared into radish composite fertilizer special, use this filtrate to prepare composite fertilizer can not only meet the demand of radish to nutritive element, and there will not be the problem causing Soil Environmental Pollution because fertile amount is residual, there is the higher value of environmental protection and economic worth.
Embodiment
Below in conjunction with embodiment, technical scheme of the present invention is further described, but described in claimed scope is not limited to.
Reaction principle illustrates:
Urea and phosphatase reaction generate Ureaphil, and Ureaphil can form the ion double salt that a kind of positive and negative charge attracts mutually under containing phosphoric acid and hot environment, and under the environment that exists at phosphoric acid of Ureaphil ion double salt, H wherein
2nCONH
3 +ion and phosphoric acid close, form the intermediate-ion of C → O coordinate bond, be CO
5pN
2h
8 +ion, and then make in Ureaphil intermediate containing a large amount of H
2pO
4 -and CO
5pN
2h
8 +ion, when adding excessive and appropriate potassium ion, dihydrogen phosphate and potassium ion form potassium dihydrogen phosphate crystal and are precipitated, unnecessary potassium ion and CO
5pN
2h
8 +ionic reaction, and displace part NH4+, make in solution containing CO
5pNH
4k
+double salt ion, by element adjustment, finally adding dried filtrate can obtain composite fertilizer.Concrete reaction equation is as follows:
Reaction equation one:
H
2PO
3+CO(NH
2)
2—CO(NH
2)
2·H
3PO
4
Reaction equation two:
CO(NH
2)
2·H
3PO
4—H
2NCONH
3 ++H
2PO
4 -
Reaction equation three:
H
2PO
4 -+K
+—KH
2PO
4
Reaction equation four:
Reaction equation five:
Below in conjunction with embodiment, the present invention is further elaborated:
Embodiment 1
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.4 mix, and temperature is risen to 100 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and potassium hydroxide hybrid reaction, controlling pH value is 3.3, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15%, phosphorus pentoxide content is 7.1%, when potassium oxide content is 8.1%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Embodiment 2
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.4 mix, and temperature is risen to 102 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and potassium hydroxide hybrid reaction, controlling pH value is 3.4, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15.2%, phosphorus pentoxide content is 7.2%, when potassium oxide content is 8.2%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Embodiment 3
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.4 mix, and temperature is risen to 103 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and potassium hydroxide hybrid reaction, controlling pH value is 3.5, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15.4%, phosphorus pentoxide content is 7.3%, when potassium oxide content is 8.3%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Embodiment 4
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.5 mix, and temperature is risen to 104 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and potassium hydroxide hybrid reaction, controlling pH value is 3.5, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15.8%, phosphorus pentoxide content is 7.5%, when potassium oxide content is 8.4%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Embodiment 5
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.5 mix, and temperature is risen to 106 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and alkaline potassium hybrid reaction, controlling pH value is 3.6, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15.9%, phosphorus pentoxide content is 7.6%, when potassium oxide content is 8.5%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Embodiment 6
Prepare a method for potassium primary phosphate coproduction radish composite fertilizer special, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.5 mix, and temperature is risen to 108 DEG C, stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and potassium hydroxide hybrid reaction, controlling pH value is 3.7, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 16%, phosphorus pentoxide content is 7.9%, when potassium oxide content is 8.6%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add calcium, iron, boron needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product;
Below in conjunction with specific experiment example, product of the present invention and technique effect are further described.
Experimental example 1
The embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6, in the radish composite fertilizer special prepared detect according to GB1887-2002 standard, its result is as shown in table 1:
The detection of content of element of table 1 radish composite fertilizer special of the present invention
| Test item | Criterion of acceptability | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| N P and K | 30％ | 30.2％ | 30.6％ | 31％ | 31.7％ | 32％ | 32.5％ |
| Nitrogen | 15％ | 15％ | 15.2％ | 15.4％ | 15.8％ | 15.9％ | 16％ |
| Phosphorus | 7％ | 7.1％ | 7.2％ | 7.3％ | 7.5％ | 7.6％ | 7.9％ |
| Potassium | 8/％ | 8.1％ | 8.2％ | 8.3％ | 8.4％ | 8.5％ | 8.6％ |
| Water content | ≤10％ | 4.5％ | 4..5％ | 4.5％ | 4.5％ | 4.5％ | 4.5％ |
By learning in table 1 that the constituent content of radish composite fertilizer special prepared by the present invention not only reaches criterion of acceptability, and be much better than criterion of acceptability, illustrate that this composite fertilizer can meet the nutritive element demand of large radish, technique effect has progress significantly.
Experimental example 2
The embodiment of the present invention 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6, in the potassium dihydrogen phosphate product prepared detect by the detection method of GBT278-1997.
Table 2 potassium dihydrogen phosphate product purity detecting of the present invention
As can be seen from Table 2, the potassium primary phosphate that technical scheme of the present invention is produced not only reaches criterion of acceptability, and the purity of product is also higher, illustrates that present method is prepared potassium dihydrogen phosphate product and had significant progress.
Experimental example 3
According to radish to the absorption of constituent content and and growing state, experiment is compared to radish composite fertilizer special and common fertilizer.With 9 radish for experimental subjects, label is A, B, C, D, E, F, G, H, I, uses common fertilizer to the radish of A, B, C tri-labels respectively, use fertilizer special for turnip prepared in embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, embodiment 6 respectively to the radish of six labels such as D, E, F, G, H, I, contrast and experiment is as shown in table 3:
Table 3 use common fertilizer and radish composite fertilizer special on radish element absorption rate on when on the impact of radish growth
The radish composite fertilizer special that as can be seen from the above table prepared by the present invention can be absorbed fully by radish, and is rich in the nutritive element needed for the radish such as Ca, Fe, B, provides guarantee, improve economic benefit to the normal growth of radish.
Claims (9)
1. prepare the method for potassium primary phosphate coproduction radish composite fertilizer special for one kind, it is characterized in that: use urea and phosphoric acid in molar ratio 1:1.4-1.6 mix, temperature is risen to 100-109 DEG C, stirring reaction 2.5h, separation obtains intermediate, by intermediate and alkaline potassium hybrid reaction, control pH value is 3.3-3.8, obtain containing nitrogen after reaction terminates, phosphorus, the mother liquor of potassium, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15-16.5%, phosphorus pentoxide content is 7-8%, when potassium oxide content is 8.1-8.9%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate, then in the filtrate obtained, add the element needed for radish, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product.
2. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1, it is characterized in that, the method comprises the following steps:
(1) raw material hybrid reaction: use urea and phosphoric acid in molar ratio 1:1.4-1.5 mix, and temperature is risen to 100-108 DEG C, and stirring velocity is 65-75r/min stirring reaction 2.5h, is separated and obtains intermediate;
(2) prepare potassium primary phosphate: by step 1) in the intermediate that obtains and alkaline potassium hybrid reaction, control pH value is 3.3-3.7, the mother liquor containing nitrogen, phosphorus, potassium is obtained after reaction terminates, mother liquor is put and decrease temperature crystalline in cooling crystallizer, monitoring analysis is carried out to mother liquor simultaneously, when nitrogen content is 15-16.4%, phosphorus pentoxide content is 7-7.9%, when potassium oxide content is 8.1-8.8%, stop crystallization and filter, namely the filter cake obtained is potassium primary phosphate;
(3) prepare radish composite fertilizer special: then to step 2) in add element needed for radish in the filtrate that obtains, and take the heat-up rate of 3 DEG C/min filtrate to be warming up to 27 DEG C to carry out drying, after dry 30min, when water content is 4.5%, obtain radish composite fertilizer special finished product.
3. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: the reaction of described urea and phosphoric acid is that urea solid and phosphoric acid solution react.
4. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: the concentration of described phosphoric acid is 65-69%.
5. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: described alkaline potassium is potassium hydroxide.
6. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: the cooling temperature of described crystallisation by cooling is 24 DEG C.
7. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: the element needed for described radish is calcium, iron, boron.
8. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 1 and 2, is characterized in that: described radish composite fertilizer special is chemical combination state Chemical Mixed Fertilizer.
9. the method preparing potassium primary phosphate coproduction radish composite fertilizer special according to claim 8, is characterized in that: described chemical combination state Chemical Mixed Fertilizer, containing following N P and K chemical combination state structural formula in its composition:
wherein, the dotted line between carbon atom and Sauerstoffatom represents to there is coordinate bond between C atom and O atom.
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|---|---|---|---|
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|---|---|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337383A (en) * | 2001-09-04 | 2002-02-27 | 慕智君 | Liquid potassium dihydrogen phosphate and its production process |
| CN103803518A (en) * | 2014-01-24 | 2014-05-21 | 贵阳中化开磷化肥有限公司 | Method for preparing monopotassium phosphate by using wet-process phosphoric acid |
-
2014
- 2014-09-19 CN CN201410478250.6A patent/CN104291297A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337383A (en) * | 2001-09-04 | 2002-02-27 | 慕智君 | Liquid potassium dihydrogen phosphate and its production process |
| CN103803518A (en) * | 2014-01-24 | 2014-05-21 | 贵阳中化开磷化肥有限公司 | Method for preparing monopotassium phosphate by using wet-process phosphoric acid |
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Application publication date: 20150121 |