MD4318B1 - Process for water purification from nitrates and nitrites - Google Patents
Process for water purification from nitrates and nitritesInfo
- Publication number
- MD4318B1 MD4318B1 MDA20130039A MD20130039A MD4318B1 MD 4318 B1 MD4318 B1 MD 4318B1 MD A20130039 A MDA20130039 A MD A20130039A MD 20130039 A MD20130039 A MD 20130039A MD 4318 B1 MD4318 B1 MD 4318B1
- Authority
- MD
- Moldova
- Prior art keywords
- water purification
- layer
- nitrites
- nitrates
- iii
- Prior art date
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to chemistry, in particular to a process for water purification from nitrates and nitrites.The process, according to the invention, comprises water filtration through a column containing a layer of granular metallic cadmium, a layer of strongly basic anionite, containing functional groups R4N+, modified with compounds of Cr(III) by treating 5 g of anionite with 500 mL of chromium sulfate (III) or chrome alums, containing 2 g Cr/L, with the pH 4.1 at the temperature of 60°C for 8 hours, and a layer of carboxylic cationite in K- or Na- form, at the same time the water is filtered at a flow rate of 1.0…1.8 ml/min, and the components in the column are taken in the ratio of 2.0:2.5:2.0.The result consists in simplifying and increasing the efficiency of the water purification process.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MDA20130039A MD4318C1 (en) | 2013-06-18 | 2013-06-18 | Process for water purification from nitrates and nitrites |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MDA20130039A MD4318C1 (en) | 2013-06-18 | 2013-06-18 | Process for water purification from nitrates and nitrites |
Publications (3)
Publication Number | Publication Date |
---|---|
MD20130039A2 MD20130039A2 (en) | 2014-12-31 |
MD4318B1 true MD4318B1 (en) | 2015-01-31 |
MD4318C1 MD4318C1 (en) | 2015-08-31 |
Family
ID=52211072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MDA20130039A MD4318C1 (en) | 2013-06-18 | 2013-06-18 | Process for water purification from nitrates and nitrites |
Country Status (1)
Country | Link |
---|---|
MD (1) | MD4318C1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623796A1 (en) * | 1986-07-15 | 1988-01-28 | Dow Chemical Rheinwerk Gmbh | DEVICE AND ADSORPTION METHOD FOR THE SELECTIVE REMOVAL OF IONS FROM LIQUIDS |
SU1699938A1 (en) * | 1989-06-21 | 1991-12-23 | Институт проблем онкологии им.Р.Е.Кавецкого | Method of purification of water from nitrites |
RU2041169C1 (en) * | 1993-05-19 | 1995-08-09 | Игорь Валентинович Никитин | Method for ion-exchange extraction of nitrate-ions |
RU2122979C1 (en) * | 1995-07-04 | 1998-12-10 | Аджи Бассам Аль | Method of purification of water from nitrates and nitrites |
GB2348209B (en) * | 1999-03-24 | 2001-05-09 | Ionex Ltd | Water purification process |
IT1318644B1 (en) * | 2000-07-25 | 2003-08-27 | Sued Chemie Mt Srl | PROCEDURE FOR WATER DENITRIFICATION. |
MD2746G2 (en) * | 2004-05-13 | 2005-12-31 | Государственный Университет Молд0 | Process for selective removal of cyanide, thiocyanate, cyanate ions from solutions |
MD3727G2 (en) * | 2008-01-09 | 2009-05-31 | Институт Химии Академии Наук Молдовы | Continuous process for water purification from nitrites |
RU2471718C1 (en) * | 2011-09-19 | 2013-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Тверской государственный университет | Method of removing nitrite ions from water solutions |
MD4241C1 (en) * | 2012-06-11 | 2014-02-28 | Государственный Университет Молд0 | Process for recovery of sulphide and hydrosulphide ions from solutions |
-
2013
- 2013-06-18 MD MDA20130039A patent/MD4318C1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
MD4318C1 (en) | 2015-08-31 |
MD20130039A2 (en) | 2014-12-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG4A | Patent for invention issued | ||
KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
MM4A | Patent for invention definitely lapsed due to non-payment of fees |