SU1261902A1 - Method of producing sodium tripolyphosphate - Google Patents
Method of producing sodium tripolyphosphate Download PDFInfo
- Publication number
- SU1261902A1 SU1261902A1 SU843801924A SU3801924A SU1261902A1 SU 1261902 A1 SU1261902 A1 SU 1261902A1 SU 843801924 A SU843801924 A SU 843801924A SU 3801924 A SU3801924 A SU 3801924A SU 1261902 A1 SU1261902 A1 SU 1261902A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- phosphoric acid
- monosodium phosphate
- solution
- sodium
- acid
- Prior art date
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Abstract
1. СПОСОБ ПОЛУЧЕНИЯ ТРИПОЖФОСФАТА НАТРИЯ, включающий нейтрализацию фосфорной кислоты содой при нагревании , отделение примесей с последующей термообработкой смеси фосфатов натри , отличающийс тем, что, с целью уменьшени пенообразовани , перед нейтрализацией в .. фосфорную кислоту ввод т мононатрий фосфат. 2.Способ по П.1, отличающийс тем, что мононатрийфосфат ввод т в виде раствора после щелочной промьшки теплообменников производства фосфорной кислоты с концентрацией мононатрийфосфата 15-25 мас.% в количестве 0,5-3,0% раствора от массы кислоты. 3.Способ по П.1, отличающийс что нейтрализацию тем, о. ведут при 90С. (Л1. METHOD OF OBTAINING SODIUM TRIPOZHPHOSPHATE, including neutralizing phosphoric acid with soda when heated, separating impurities, and then heat treating a mixture of sodium phosphates, in order to reduce foaming, before neutralizing phosphoric acid, inject monosodium phosphate. 2. A method according to claim 1, characterized in that the monosodium phosphate is introduced as a solution after an alkaline bed of heat exchangers producing phosphoric acid with a monosodium phosphate concentration of 15-25% by weight in an amount of 0.5-3.0% of the solution by weight of the acid. 3. The method according to claim 1, characterized in that the neutralization of those on. lead at 90C. (L
Description
Изобретение относитс к технологии получени триполифосфата натри и может быть использовано в области получени детергентов и в пищевой проь зшше нно с ти.The invention relates to the technology of sodium tripolyphosphate and can be used in the field of detergents and foodstuffs.
Цель изобретени - уменьшение пенообразовани .The purpose of the invention is to reduce foaming.
Пример 1. К 1000 кг Д0%-ной фосфорной кислоты добавл ют 5 кг раствора мононатрийфосфата в виде промывных вод от щелочной промывки теплообменников производства фосфорной кислоты концентрации 20 мас,% и нейтрализуют кислоту 432 кг соды при 90°С до рН 8,0 и мольного отношени NajO : PjOyj равного 1,98. Полученный раствор обрабатывают далее фосфорной кислотой концентрации 73 75% до рН 6,3 и мольного отношени NajO : PjOy, равного 1,7. Нейтрализованньш раствор, содержащий 48,3% смеси ортофосфатов натри , фильтруют от примесей и направл ют на термообработку . Высота пенообразующего сло в реакторе 220 мм (по известному способу 300 мм), увеличение производительности аппарата 4%).Example 1. To 1000 kg of D0% phosphoric acid, add 5 kg of mononatry phosphate solution in the form of wash water from alkaline washing of heat exchangers producing phosphoric acid with a concentration of 20 wt.% And neutralize the acid with 432 kg of soda at 90 ° C to pH 8.0 and the molar ratio NajO: PjOyj is 1.98. The resulting solution is further treated with phosphoric acid at a concentration of 73–75% to a pH of 6.3 and a molar ratio of NajO: PjOy equal to 1.7. The neutralized solution, containing 48.3% of a mixture of sodium orthophosphates, is filtered from impurities and sent to heat treatment. The height of the foaming layer in the reactor is 220 mm (300 mm by the known method), an increase in the productivity of the apparatus is 4%).
Примеры 2-10. Ход операций аналогичен примеру 1, отличие - количество мононатрийфосфата.Examples 2-10. The course of operations is similar to example 1, the difference is the amount of monosodium phosphate.
Данные сведены в таблицу.The data are tabulated.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU843801924A SU1261902A1 (en) | 1984-07-20 | 1984-07-20 | Method of producing sodium tripolyphosphate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU843801924A SU1261902A1 (en) | 1984-07-20 | 1984-07-20 | Method of producing sodium tripolyphosphate |
Publications (1)
Publication Number | Publication Date |
---|---|
SU1261902A1 true SU1261902A1 (en) | 1986-10-07 |
Family
ID=21142780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU843801924A SU1261902A1 (en) | 1984-07-20 | 1984-07-20 | Method of producing sodium tripolyphosphate |
Country Status (1)
Country | Link |
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SU (1) | SU1261902A1 (en) |
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1984
- 1984-07-20 SU SU843801924A patent/SU1261902A1/en active
Non-Patent Citations (1)
Title |
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Авторское свидетельство СССР № 768755, кл. С 01 В 25/40, 1978. * |
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