TRAILBLAZER TECHNOLOGIES (PTY) LTD (Afrique du Sud)
Inventeur(s)
Bewsey, John Arthur
Abrégé
Disclosed herein is a process for carrying out an ion exchange process which involves providing two interacting sets of banks of continuously stirred tank reactors (CSTR's) each containing a bed of ion exchange resin and causing the resin to move in one direction through each bank of reactors and the feed solution and/or or eluant in the opposite direction. In carrying out the process, a feed solution is introduced in a first reactor causing dissolved ions to be captured on the resin, eluant is introduced into a reactor upstream of the first reactor in the direction of resin movement causing ions captured on the resin to be removed into the eluant and eluant rich in ions removed from the resin will be taken from a reactor upstream of the reactor in which the eluant was introduced, for further processing. Thus, in this form of the invention there is, in effect, a loading bank of reactors in which ions from the feed solution are captured followed by a regenerating bank of reactors in which the eluant removes the ions captured on the resin and regenerates the resin.
B01J 47/10 - Procédés d'échange d'ions en généralAppareillage à cet effet à substance échangeur d'ions mobileProcédés d'échange d'ions en généralAppareillage à cet effet à substance échangeur d'ions en suspension ou sous forme de lit fluidisé
B01J 49/00 - Régénération ou réactivation des échangeurs d'ionsAppareillage à cet effet
C02F 1/42 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par échange d'ions
B01J 49/16 - Régénération ou réactivation des échangeurs d'ionsAppareillage à cet effet des lits fluidifiés contenant des échangeurs cationiques et anioniques en lits séparés
TRAILBLAZER TECHNOLOGIES (PTY) LTD (Afrique du Sud)
Inventeur(s)
Bewsey, John Arthur
Abrégé
This invention relates to a process for carrying out an ion exchange process which involves providing two interacting sets of banks of continuously stirred tank reactors (CSTR's) each containing a bed of ion exchange resin and causing the resin to move in one direction through each bank of reactors and the feed solution and/or or eluant in the opposite direction, in carrying out the process, a feed solution is introduced in a first reactor causing dissolved ions to be captured on the resin, eluant is introduced into a reactor upstream of the first reactor in the direction of resin movement causing ions captured on the resin to be removed into the eluant and eluant rich in ions removed from the resin will be taken from a reactor upstream of the reactor in which the eluant was introduced, for further processing. Thus, in this form of the invention there is, in effect, a loading bank of reactors in which ions from the feed solution are captured followed by a regenerating bank of reactors in which the eluant removes the ions captured on the resin and regenerates the resin.
B01J 47/026 - Procédés sur colonne ou sur lit utilisant des colonnes ou des lits en séries de substances échangeur d’ions différentes
B01J 47/014 - Procédés d'échange d'ions en généralAppareillage à cet effet dans lesquels les propriétés d’adsorption de l’échangeur d’ions sont utilisées, p. ex. récupération de protéines ou de composés macromoléculaires
TRAILBLAZER TECHNOLOGIES (PTY) LTD (Afrique du Sud)
Inventeur(s)
Bewsey, John Arthur
Abrégé
This invention relates to a process for carrying out an ion exchange process which involves providing two interacting sets of banks of continuously stirred tank reactors (CSTR's) each containing a bed of ion exchange resin and causing the resin to move in one direction through each bank of reactors and the feed solution and/or or eluant in the opposite direction, in carrying out the process, a feed solution is introduced in a first reactor causing dissolved ions to be captured on the resin, eluant is introduced into a reactor upstream of the first reactor in the direction of resin movement causing ions captured on the resin to be removed into the eluant and eluant rich in ions removed from the resin will be taken from a reactor upstream of the reactor in which the eluant was introduced, for further processing. Thus, in this form of the invention there is, in effect, a loading bank of reactors in which ions from the feed solution are captured followed by a regenerating bank of reactors in which the eluant removes the ions captured on the resin and regenerates the resin.
B01J 47/10 - Procédés d'échange d'ions en généralAppareillage à cet effet à substance échangeur d'ions mobileProcédés d'échange d'ions en généralAppareillage à cet effet à substance échangeur d'ions en suspension ou sous forme de lit fluidisé
B01J 49/00 - Régénération ou réactivation des échangeurs d'ionsAppareillage à cet effet
C01D 9/04 - Préparation avec de l'acide nitrique liquide
C02F 1/42 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par échange d'ions
C05C 5/02 - Engrais contenant d'autres nitrates contenant du nitrate de sodium ou de potassium
C05D 3/02 - Engrais calciques à partir de pierre à chaux, carbonate de calcium, hydrate de calcium, de chaux éteinte, oxyde de calcium, composés calciques résiduaires
TRAILBLAZER TECHNOLOGIES (PTY) LTD (Afrique du Sud)
Inventeur(s)
Forsyth, Alastair James
Bewsey, John Arthur
Abrégé
The invention provides a method of reducing the sodium content of a water containing dissolved sodium ions, particularly a water with a sodium ion content of at least 100 ppm. Examples of such waters are effluents such as acid mine drainage and river waters. The method includes the steps of: (i) removing sodium, calcium and magnesium ions from the water by contacting the water with a cation exchange resin/s to capture sodium, calcium and magnesium ions thereon, (ii) treating the cation exchange resin/s of step (i) with nitric acid to produce an eluant containing sodium ions, calcium ions, magnesium ions nitrate ions and nitric acid, (iii) adding a carbonate to the eluant to precipitate the calcium and magnesium ions as calcium and magnesium carbonates; (iv) separating the precipated carbonates from the eluant; and (v) treating the eluant from step (iv) to obtain a sodium and/or potassium nitrate product.
TRAILBLAZER TECHNOLOGIES (PTY) LTD (Afrique du Sud)
Inventeur(s)
Forsyth, Alastair James
Bewsey, John, Arthur
Abrégé
The invention provides a method of reducing the sodium content of a water containing dissolved sodium ions, particularly a water with a sodium ion content of at least 100 ppm. Examples of such waters are effluents such as acid mine drainage and river waters. The method includes the steps of: (i) removing sodium, calcium and magnesium ions from the water by contacting the water with a cation exchange resin/s to capture sodium, calcium and magnesium ions thereon, (ii) treating the cation exchange resin/s of step (i) with nitric acid to produce an eluant containing sodium ions, calcium ions, magnesium ions nitrate ions and nitric acid, (iii) adding a carbonate to the eluant to precipitate the calcium and magnesium ions as calcium and magnesium carbonates; (iv) separating the precipated carbonates from the eluant; and (v) treating the eluant from step (iv) to obtain a sodium and/or potassium nitrate product.