SU295246A1 - - Google Patents
Info
- Publication number
- SU295246A1 SU295246A1 SU1235629A SU1235629A SU295246A1 SU 295246 A1 SU295246 A1 SU 295246A1 SU 1235629 A SU1235629 A SU 1235629A SU 1235629 A SU1235629 A SU 1235629A SU 295246 A1 SU295246 A1 SU 295246A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phosphoric acid
- phosphate
- soda
- mixture
- na2o
- Prior art date
Links
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 19
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 4
- NTGONJLAOZZDJO-UHFFFAOYSA-M disodium;hydroxide Chemical compound [OH-].[Na+].[Na+] NTGONJLAOZZDJO-UHFFFAOYSA-M 0.000 claims description 4
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 claims description 4
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 230000005591 charge neutralization Effects 0.000 claims description 3
- 230000001264 neutralization Effects 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000002378 acidificating Effects 0.000 claims description 2
- 230000003472 neutralizing Effects 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 235000021317 phosphate Nutrition 0.000 claims 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims 2
- 238000002360 preparation method Methods 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- -1 monosubstituted phosphate Chemical class 0.000 claims 1
- 238000007669 thermal treatment Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 2
- 229910000397 disodium phosphate Inorganic materials 0.000 description 2
- 235000019800 disodium phosphate Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 239000001488 sodium phosphate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CUXQLKLUPGTTKL-UHFFFAOYSA-M Microcosmic salt Chemical compound [NH4+].[Na+].OP([O-])([O-])=O CUXQLKLUPGTTKL-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000005712 crystallization Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Description
СПОСОБ ПОЛУЧЕНИЯ ТРИПОЛИФОСФАТА НАТРИЯMETHOD FOR PRODUCING SODIUM TRIPOLYPHOSPHATE
Изобретение относитс к способам получени нолифосфатов щелочных металлов.This invention relates to methods for producing alkali metal niphosphates.
Известен способ получени триполифосфата натри путем нейтрализации экстракционной фосфорной кислоты, например, содой до нолучени кислого динатрийфосфата, фильтрации раствора, упаривани его и выделени кристаллизацией Na2HPO4. Последний после перекристаллизации смешивают с экстракционной фосфорной кислотой, предварительно очищенной с помощью ионообменной смолы. Смешение комнонентов провод т до молекул рного соотношени Na2O : Р2О5, равного 5 : 3. Полученную смесь сушат и прокаливают.A method of producing sodium tripolyphosphate is known by neutralizing extraction phosphoric acid, for example, with soda until acid disodium phosphate is obtained, filtering the solution, evaporating it and isolating the crystallization of Na2HPO4. The latter, after recrystallization, is mixed with extraction phosphoric acid, previously purified using an ion exchange resin. The mixture of the components is carried out until the molecular ratio of Na2O: P2O5 is 5: 3. The resulting mixture is dried and calcined.
С целью исключени предварительной очистки фосфорной кислоты и повышени качества продукта предлол ено нейтрализацию фосфорной кислоты нроводить аммиаком и полученный однозамещенный фосфат аммони обрабатывать шелочью или содой. При этом получают кислый двухзамещенный фосфат натрийаммони , который затем обрабатывают щелочью или содой нри нагревании до молекул рного соотношени компонентов Na2O : : РгОг), равного 5:3.In order to exclude the preliminary purification of phosphoric acid and improve the quality of the product, neutralization of phosphoric acid is intended to be carried out with ammonia and the monosodium phosphate obtained should be treated with silk or soda. An acidic sodium ammonium phosphate is then obtained, which is then treated with alkali or soda when heated to a molecular ratio of the components Na2O: PgOg) of 5: 3.
твором, полученным носле отделени двузамещенного фосфата.cream obtained in the separation of dibasic phosphate.
Пример. Перва стади . К 20 кг экстракционной фосфорной кислоты добавл ют 13,7 кг маточного раствора, полученного на второй стадии. Далее смесь нейтрализуют аммиаком до рН 5, кип т т и отдел ют осадок. Полученный маточнЕ й раствор в количестве 29,2 кг имеет следующнй состав (в %): Р2Ог, 18,86; SO, 4.21; NnoO 0,713; NHj 7.30; F 0,83; Fe 0,017; Al 0,063.Example. The first stage. To 20 kg of phosphoric acid extraction, 13.7 kg of the mother liquor obtained in the second stage are added. The mixture is then neutralized with ammonia to pH 5, boiled and the precipitate is separated. The resulting mother liquor in the amount of 29.2 kg has the following composition (in%): P2Og, 18.86; SO, 4.21; NnoO 0.713; NHj 7.30; F 0.83; Fe 0.017; Al 0.063.
Втора стади . В маточный раствор при температуре 80°С ввод т 3,8 кг кальцинированной соды, затем раствор охлал дают до температуры 20°С н отдел ют 14,0 кг соли Na(Nn4)HPO4-4n2O. Маточный раствор с нромывными водами в количестве 19,8 кг и полученна соль имеют состав (в %):The second stage. 3.8 kg of soda ash are introduced into the mother liquor at a temperature of 80 ° C, then the solution is cooled to a temperature of 20 ° C and the 14.0 kg of Na (Nn4) HPO4-4n2O salt is separated. The mother liquor with washing waters in the amount of 19.8 kg and the resulting salt have the composition (in%):
Содержание,Content,
соль при нагревании раствор ют в воде, и ввод т в раствор 2,20 кг кальцинированной соды.the salt is dissolved in water when heated and 2.20 kg of soda ash are introduced into the solution.
Треть стади . Раствор, полученный на второй стадии при нагревании, подвергают перегонке извлечени аммиака, а затем его концентрируют до содержани в растворе 29% Р2О5. Аммиак направл ют на первую стадию нейтрализации фосфорной кислоты.Third stage. The solution obtained in the second stage by heating is subjected to distillation of the extraction of ammonia, and then it is concentrated to contain 29% P2O5 in solution. Ammonia is sent to the first stage of phosphoric acid neutralization.
Четверта стади . Раствор ортофосфатов выпаривают в распылительной сушилке, а затем обезвоженный продукт нагревают в атмосфере вод ного пара дл окончательной дегидратацьи .The fourth stage. The orthophosphate solution is evaporated in a spray dryer, and then the dehydrated product is heated in an atmosphere of water vapor for final dehydration.
Получено 7,7 кг продукта, содержащего 97% триполифосфата натри .7.7 kg of product were obtained containing 97% sodium tripolyphosphate.
Предмет изобретени Subject invention
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU295246A1 true SU295246A1 (en) |
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