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1. WO2022010725 - TREATMENT OF NITROGEN COMPOUNDS IN SPENT CAUSTIC

Publication Number WO/2022/010725
Publication Date 13.01.2022
International Application No. PCT/US2021/040040
International Filing Date 01.07.2021
IPC
C02F 1/72 2006.1
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
72by oxidation
B01J 23/42 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
38of noble metals
40of the platinum group metals
42Platinum
B01J 23/44 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
38of noble metals
40of the platinum group metals
44Palladium
B01J 23/46 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
38of noble metals
40of the platinum group metals
46Ruthenium, rhodium, osmium or iridium
B01J 23/89 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
70of the iron group metals or copper
89combined with noble metals
C02F 1/74 2006.1
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
72by oxidation
74with air
Applicants
  • SIEMENS ENERGY, INC. [US]/[US]
Inventors
  • BURCLAFF, Philip A.
  • KUMFER, Bryan J.
Agents
  • OTTERLEE, Thomas J.
Priority Data
63/049,72809.07.2020US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) TREATMENT OF NITROGEN COMPOUNDS IN SPENT CAUSTIC
(FR) TRAITEMENT DES COMPOSÉS AZOTÉS DANS UNE SOLUTION ÉPUISÉE DE SOUDE CAUSTIQUE
Abstract
(EN) Systems for treating wastewater containing organic nitrogen compounds are disclosed. The systems include a wet air oxidation unit having an oxidation zone, a catalytic zone, and a metal-based catalyst. Methods of treating wastewater containing organic nitrogen compounds are also disclosed. The methods include contacting the wastewater with an oxidant to produce a mixed liquor, contacting the mixed liquor with a metal-based catalyst to catalyze ammonia and produce a gas containing nitrogen and a liquid effluent containing nitrogen. Methods of retrofitting a wet air oxidation unit including providing a metal-based catalyst are also disclosed. Methods of facilitating treatment of wastewater in a wet air oxidation unit including providing a metal-based catalyst are also disclosed.
(FR) L'invention concerne des systèmes de traitement des eaux usées contenant des composés organiques azotés. Les systèmes comprennent une unité d'oxydation de l'air par voie humide comportant une zone d'oxydation, une zone catalytique et un catalyseur à base de métal. L'invention concerne également des procédés de traitement des eaux usées contenant des composés azotés organiques. Les procédés comprennent la mise en contact des eaux usées avec un oxydant pour produire une liqueur mixte, la mise en contact de la liqueur mixte avec un catalyseur à base de métal pour catalyser l'ammoniac et produire un gaz contenant de l'azote et un effluent liquide contenant de l'azote. L'invention concerne également des procédés de mise à niveau d'une unité d'oxydation de l'air par voie humide comprenant la fourniture d'un catalyseur à base de métal. L'invention concerne également des procédés permettant de faciliter le traitement des eaux usées dans une unité d'oxydation à l'air humide comprenant la fourniture d'un catalyseur à base de métal.
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