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 acid

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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
Application number
PL389863A
Other languages
Polish (pl)
Other versions
PL211850B1 (en
Inventor
Lech Iwański
Marian Spadło
Andrzej Brzezicki
Damian Kiełkiewicz
Janusz Peć
Tadeusz Jakubas
Jan Kłoczko
Barbara Loryś
Original Assignee
Instytut Ciężkiej Syntezy Organicznej BLACHOWNIA
Zakłady Chemiczne ORGANIKA-SARZYNA Spółka Akcyjna
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Instytut Ciężkiej Syntezy Organicznej BLACHOWNIA, Zakłady Chemiczne ORGANIKA-SARZYNA Spółka Akcyjna filed Critical Instytut Ciężkiej Syntezy Organicznej BLACHOWNIA
Priority to PL389863A priority Critical patent/PL211850B1/en
Publication of PL389863A1 publication Critical patent/PL389863A1/en
Publication of PL211850B1 publication Critical patent/PL211850B1/en

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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.

PL389863A 2009-12-11 2009-12-11 Method for closing the circulation of sodium hypochlorite in the production of 4-chloro-2-methylphenoxyacetic acid PL211850B1 (en)

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

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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)

Also Published As

Publication number Publication date
PL211850B1 (en) 2012-07-31

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