METHOD FOR CONVERTING BRINES INTO ACIDS AND BASES, AND PRODUCTS OBTAINED

The invention relates to a method for treating brines, which includes the steps of: subjecting a stream of brines (4, 13) to a pretreatment (5, 14) by means of membrane separation (15) designed such as to obtain a stream of brines that are substantially free of divalent ions (7, 16) and a residual s...

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Main Authors URTIAGA MENDIA, ANA MARIA, IBANEZ MENDIZABAL, RAQUEL, PEREZ GONZALEZ, ANTIA, ORTIZ URIBE, INMACULADA
Format Patent
LanguageEnglish
French
Spanish
Published 23.01.2014
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Abstract The invention relates to a method for treating brines, which includes the steps of: subjecting a stream of brines (4, 13) to a pretreatment (5, 14) by means of membrane separation (15) designed such as to obtain a stream of brines that are substantially free of divalent ions (7, 16) and a residual stream which includes an electrolytic solution (6, 17); subjecting the stream of brines (7, 16) obtained in the preceding step to a treatment (8, 18) by means of electrodialysis using bipolar membranes designed such as to obtain a stream of hydrochloric acid (9, 28) and a stream of sodium hydroxide (10, 29), as well as a stream of desalinated water (30). The invention also relates to a hydrochloric acid solution obtained by means of the preceding method. The invention also relates to a sodium hydroxide solution obtained by means of the preceding method. Un proceso de tratamiento de salmueras que comprende las etapas de: someter una corriente de salmueras (4, 13) a un pretratamiento (5, 14) mediante separación por membranas (15) diseñado para obtener una corriente de salmueras sustancialmente libre de iones divalentes (7, 16) y una corriente residual que comprende una disolución electrolítica (6,17); someter la corriente de salmueras (7, 16) obtenida en la etapa anterior a un tratamiento (8, 18) mediante electrodiálisis con membranas bipolares diseñado para obtener una corriente de ácido clorhídrico (9, 28) y una corriente de hidróxido sódico (10, 29), además de una corriente de agua desalinizada (30). Una disolución de ácido clorhídrico obtenida mediante el proceso anterior. Una disolución de hidróxido sódico obtenida mediante el proceso anterior. L'invention concerne un procédé de traitement de saumures qui comprend les étapes consistant: à soumettre un courant de saumures (4, 13) à un prétraitement (5, 14) par séparation par membranes (15) conçu pour obtenir un courant de saumures sensiblement dépourvu d'ions divalents (7, 16) et un courant résiduel qui comprend une dissolution électrolytique (6, 17); à soumettre le courant de saumures (7, 16) obtenu lors de l'étape antérieure à un traitement (8, 18) par électrodialyse à l'aide de membranes bipolaires conçue pour obtenir un courant d'acide chlorhydrique (9, 28) et un courant d'hydroxyde sodique (10, 29), en plus d'un courant d'eau désalinisée (30). L'invention concerne également une dissolution d'acide chlorhydrique obtenue à l'aide du procédé antérieur. L'invention concerne enfin une dissolution d'hydroxyde sodique obtenue à l'aide du procédé antérieur.
AbstractList The invention relates to a method for treating brines, which includes the steps of: subjecting a stream of brines (4, 13) to a pretreatment (5, 14) by means of membrane separation (15) designed such as to obtain a stream of brines that are substantially free of divalent ions (7, 16) and a residual stream which includes an electrolytic solution (6, 17); subjecting the stream of brines (7, 16) obtained in the preceding step to a treatment (8, 18) by means of electrodialysis using bipolar membranes designed such as to obtain a stream of hydrochloric acid (9, 28) and a stream of sodium hydroxide (10, 29), as well as a stream of desalinated water (30). The invention also relates to a hydrochloric acid solution obtained by means of the preceding method. The invention also relates to a sodium hydroxide solution obtained by means of the preceding method. Un proceso de tratamiento de salmueras que comprende las etapas de: someter una corriente de salmueras (4, 13) a un pretratamiento (5, 14) mediante separación por membranas (15) diseñado para obtener una corriente de salmueras sustancialmente libre de iones divalentes (7, 16) y una corriente residual que comprende una disolución electrolítica (6,17); someter la corriente de salmueras (7, 16) obtenida en la etapa anterior a un tratamiento (8, 18) mediante electrodiálisis con membranas bipolares diseñado para obtener una corriente de ácido clorhídrico (9, 28) y una corriente de hidróxido sódico (10, 29), además de una corriente de agua desalinizada (30). Una disolución de ácido clorhídrico obtenida mediante el proceso anterior. Una disolución de hidróxido sódico obtenida mediante el proceso anterior. L'invention concerne un procédé de traitement de saumures qui comprend les étapes consistant: à soumettre un courant de saumures (4, 13) à un prétraitement (5, 14) par séparation par membranes (15) conçu pour obtenir un courant de saumures sensiblement dépourvu d'ions divalents (7, 16) et un courant résiduel qui comprend une dissolution électrolytique (6, 17); à soumettre le courant de saumures (7, 16) obtenu lors de l'étape antérieure à un traitement (8, 18) par électrodialyse à l'aide de membranes bipolaires conçue pour obtenir un courant d'acide chlorhydrique (9, 28) et un courant d'hydroxyde sodique (10, 29), en plus d'un courant d'eau désalinisée (30). L'invention concerne également une dissolution d'acide chlorhydrique obtenue à l'aide du procédé antérieur. L'invention concerne enfin une dissolution d'hydroxyde sodique obtenue à l'aide du procédé antérieur.
Author IBANEZ MENDIZABAL, RAQUEL
PEREZ GONZALEZ, ANTIA
URTIAGA MENDIA, ANA MARIA
ORTIZ URIBE, INMACULADA
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DocumentTitleAlternate PROCÉDÉ DE CONVERSION DE SAUMURES EN ACIDES ET BASES ET PRODUITS OBTENUS
PROCESO DE CONVERSIÓN DE SALMUERAS EN ÁCIDOS Y BASES Y PRODUCTOS OBTENIDOS
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Snippet The invention relates to a method for treating brines, which includes the steps of: subjecting a stream of brines (4, 13) to a pretreatment (5, 14) by means of...
SourceID epo
SourceType Open Access Repository
SubjectTerms CHEMISTRY
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Title METHOD FOR CONVERTING BRINES INTO ACIDS AND BASES, AND PRODUCTS OBTAINED
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