SU173250A1 - - Google Patents
Info
- Publication number
- SU173250A1 SU173250A1 SU863377A SU863377A SU173250A1 SU 173250 A1 SU173250 A1 SU 173250A1 SU 863377 A SU863377 A SU 863377A SU 863377 A SU863377 A SU 863377A SU 173250 A1 SU173250 A1 SU 173250A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- urea
- nitrogen
- melt
- phosphorus
- acid
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 3
- -1 nitrogen-phosphate Chemical compound 0.000 claims description 3
- 235000011007 phosphoric acid Nutrition 0.000 claims description 3
- 239000011541 reaction mixture Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002686 phosphate fertilizer Substances 0.000 claims description 2
- 150000003016 phosphoric acids Chemical class 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 230000002194 synthesizing Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000005712 crystallization Effects 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229920000137 polyphosphoric acid Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BVCZEBOGSOYJJT-UHFFFAOYSA-N Ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- PRKQVKDSMLBJBJ-UHFFFAOYSA-N Ammonium carbonate Chemical class N.N.OC(O)=O PRKQVKDSMLBJBJ-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000005591 charge neutralization Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Известно получение комплексного азотнофосфорного удобрени из мочевины и фосфорных кислот. В таком удобрении содержание азота по отношению к фосфору мало.The production of complex nitrogen-phosphate fertilizer from urea and phosphoric acids is known. In such a fertilizer, the nitrogen content in relation to phosphorus is low.
С целью повышени содержани количества азота в комплексном азотно-фосфорном удобрении предложено примен ть мочевииу в -виде плава, вл ющегос полупродуктом синтеза мочевины, и в реакционную смесь дополнительно вводить газообразный аммиак.In order to increase the amount of nitrogen in the complex nitrogen-phosphorus fertilizer, it is proposed to use urea in the form of water, which is a intermediate product of urea synthesis, and to add an additional ammonia gas to the reaction mixture.
Таким образом получают удобрени с заданным соотношением азота и фосфора, в частности , с повышенным содержанием азота.In this way, fertilizers are obtained with a predetermined ratio of nitrogen and phosphorus, in particular, with a high nitrogen content.
Соотношение азота к фосфору в конечных продуктах можно регулировать введением в плав мочевины не только заранее рассчитанного количества фосфорной кислоты, но и свободного аммиака. Дл предотврапдени местных перегревов в реакционной смеси кислоту добавл ют к плаву мочевины, состо щему из мочевины, избыточного аммиака, карбамата аммони и углекислых солей аммони , медленно и при посто нном перемешивании. Температура реакции не должна превышать 60-The ratio of nitrogen to phosphorus in the final products can be regulated by introducing into the melt of urea not only a pre-calculated amount of phosphoric acid, but also free ammonia. To prevent local overheating in the reaction mixture, acid is added to the melt of urea, which consists of urea, excess ammonia, ammonium carbamate and carbonate ammonium salts, slowly and with constant stirring. The reaction temperature should not exceed 60
70° С. Момент полной нейтрализации кислоты определ ют мгновенной кристаллизацией всей реакционной массы.70 ° C. The moment of complete neutralization of the acid is determined by instant crystallization of the entire reaction mass.
Пример 1. 25 г полифосфорной кислоты смешивают с 32,8 г плава мочевииы. Готовый продукт содержит 27,8% N и 43,5% Р2 Os.Example 1. 25 g of polyphosphoric acid is mixed with 32.8 g of urea melt. The finished product contains 27.8% N and 43.5% P2 Os.
Пример 2. В смесь равных весовых количеств полифосфорной кислоты (25 г) и плава мочевины (25 г) при непрерывном перемешивании дополнительно ввод т газообразный аммиак до момента кристаллизации всей реакционной массы. Образующийс при этом продукт содержит 38% N; 40,7% Р2Од.Example 2. In a mixture of equal weight amounts of polyphosphoric acid (25 g) and molten urea (25 g) with continuous stirring, additional ammonia gas is added until the moment of crystallization of the entire reaction mass. The resulting product contains 38% N; 40.7% P2O.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU173250A1 true SU173250A1 (en) |
Family
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