PL389863A1 - Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acid - Google Patents
Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acidInfo
- Publication number
- PL389863A1 PL389863A1 PL389863A PL38986309A PL389863A1 PL 389863 A1 PL389863 A1 PL 389863A1 PL 389863 A PL389863 A PL 389863A PL 38986309 A PL38986309 A PL 38986309A PL 389863 A1 PL389863 A1 PL 389863A1
- Authority
- PL
- Poland
- Prior art keywords
- acid
- sodium hypochlorite
- chloro
- production
- sodium
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Sposób zamknięcia obiegu podchlorynu sodowego w produkcji kwasu 4-chloro-2-metylofenoksyoctowego, metodą ciągłą, charakteryzuje się tym, że chlorek sodowy generowany w reakcjach: kondensacji o-krezolu z kwasem chlorooctowym w środowisku alkalicznym, chlorowania podchlorynem sodowym kwasu 2-metylofenoksyoctowego otrzymanego z reakcji kondensacji i neutralizacji kwasem solnym soli sodowej kwasu 4-chloro-2-metylofenoksyoctowego, wyprowadza się z układu produkcji jako ścieki solankowe, które poddaje się oczyszczaniu od fenoksykwasów na drodze adsorpcji na węglu aktywnym do poziomu 1 ppm, następnie strumień ścieków solankowych po adsorpcji kieruje się do elektrolizy, w której kwas glikolowy, zawarty w ściekach solankowych, rozkłada się prądowo do dwutlenku węgla i wody, a uzyskuje się chlor gazowy i wodny roztwór wodorotlenku sodowego, które poddaje się syntezie do podchlorynu sodowego.The method of closing the sodium hypochlorite cycle in the production of 4-chloro-2-methylphenoxyacetic acid, using the continuous method, is characterized by the fact that sodium chloride generated in the following reactions: condensation of o-cresol with chloroacetic acid in an alkaline environment, chlorination with sodium hypochlorite of 2-methylphenoxyacetic acid obtained from reaction of condensation and neutralization with hydrochloric acid of the sodium salt of 4-chloro-2-methylphenoxyacetic acid, is discharged from the production system as brine wastewater, which is purified from phenoxy acids by adsorption on activated carbon to the level of 1 ppm, then the stream of brine wastewater after adsorption is directed electrolysis, in which the glycolic acid contained in the brine wastewater is decomposed into carbon dioxide and water, and chlorine gas and an aqueous solution of sodium hydroxide are obtained, which are synthesized to sodium hypochlorite.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL389863A PL211850B1 (en) | 2009-12-11 | 2009-12-11 | Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL389863A PL211850B1 (en) | 2009-12-11 | 2009-12-11 | Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
PL389863A1 true PL389863A1 (en) | 2011-06-20 |
PL211850B1 PL211850B1 (en) | 2012-07-31 |
Family
ID=44201586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PL389863A PL211850B1 (en) | 2009-12-11 | 2009-12-11 | Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acid |
Country Status (1)
Country | Link |
---|---|
PL (1) | PL211850B1 (en) |
-
2009
- 2009-12-11 PL PL389863A patent/PL211850B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL211850B1 (en) | 2012-07-31 |
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