345results about "Ion exchange beds cleaning/rinsing" patented technology

Low metal, low water biomass-derived pyrolysis oils and methods for producing the same are provided. Metal- and water-containing biomass-derived pyrolysis oil is contacted with an acidic ion-exchange resin having sulfonic acid groups to produce a low metal, water-containing biomass-derived pyrolysis oil. The low metal, water-containing biomass-derived pyrolysis oil is removed from the spent ion-exchange resin after ion-exchange. The low metal, water-containing biomass-derived pyrolysis oil is distilled to produce a low metal, low water biomass-derived pyrolysis oil and a distillation product. The distillation product comprises one or both of an alcohol ion-exchange regenerant and an acidic ion-exchange regenerant which may be used to regenerate the spent ion-exchange resin. The regenerated acidic ion-exchange resin may be recycled. The spent alcohol and acid ion-exchange regenerants may be recovered and recycled.

Low metal biomass-derived pyrolysis oils and processes for producing the same are provided. Low metal biomass-derived pyrolysis oil is produced by a process of contacting metal-containing biomass-derived pyrolysis oil with an acidic ion-exchange resin having sulfonic acid groups. Low metal biomass-derived pyrolysis oil is removed from spent acidic ion-exchange resin after ion-exchange.

A method of chemically extracting radium-228, rare earth metals, thorium, the decay products of thorium, and phosphates from thorium-containing ores. The method involves breaking thorium-containing ore into fragments, wetting the fragments with a concentrated strong acid to make a slurry, heating the slurry, passing the heated solution through a first anion exchange column, retaining metals and radium-228 captured on the resin, allowing the radium-228 ions to decay to actinium-228, purifying the actinium-228 fraction, sending the actinium-228 fraction through a capture column, eluting the captured thorium-228 with acid, removing radium from the solution, retaining the radium-228 fraction for isomer in-growth, retaining decay products from the radium-228, separating the REEs from the process stream; and eluting and retaining the REEs.

An improved process for regenerating ion exchange resin, includes a regeneration step of displacing captured ions from the resin to regenerate its ion-capture functionality, followed by one or more fluid-employing post-regeneration steps such as a fluid displacement or rinse, a fluid transport or mixing, and a rinse down to quality. To avoid problems of early leakage of weakly held ions such as boron, the post-chemical or postdisplacement steps use water that is essentially free of boron, or otherwise avoid localized contamination in the regenerated resin which is used in bottles or beds (30). A two-stage polish may be operated with modified lead/lag bottles. A detector (D) for an indicator condition (conductivity, silica breakthrough) between stages determines when to shift the lag bottle forward, and periodically both bottles are replaced.

The present invention provides methods for cleaning or regenerating a chromatography materiel for reuse. The methods of the invention can be used for cleaning or regenerating chromatography columns for reuse in the large-scale manufacture of multiple polypeptide products.

Systems and methods for recharging zirconium phosphate and zirconium oxide are provided. The systems and methods provide for recharging of the zirconium phosphate and zirconium oxide in reusable sorbent modules. The systems and methods include recharging flow paths for recharging zirconium phosphate independently or concurrently.

A process for the removal of an amine captureable gas from a feed gas stream using an amine solvent, the process comprises (a) contacting the feed gas stream with a lean amine solvent to form a rich amine solvent, wherein heat stable salts are present in the rich amine solvent; (b) stripping amine captureable gas from the rich amine solvent to form the lean amine solvent and an overhead reflux stream; (c) periodically contacting at least a portion of one or both of the lean amine solvent and the rich amine solvent with an anion exchange resin to form a first heat stable salt lean amine solvent; (d) periodically regenerating the anion exchange resin, wherein during the regeneration of the anion exchange resin, at least a portion of the reflux stream is used to wash the amine solvent from the anion exchange resin to produce a second heat stable salt lean amine solvent; and, (e) recycling at least a portion of the first and the second heat stable salt lean amine solvent for use in capturing the amine captureable gas from the feed gas.

The invention discloses a method for the on-line recovery of ion exchange resin. The method for the on-line recovery of ion exchange resin is carried out in an ion exchanger and comprises the following steps: flushing the ion exchange resin by using desalted water so as to remove dust and suspended matters in the ion exchange resin; backflushing the flushed resin by using acid so as to remove metal ions which are adsorbed by the ion exchange resin; soaking the resin by using a mixed solution 5-7% Na2SO4 and 8-10% NaOH so as to remove organic matters in the ion exchange resin; and NaOH solution is used to regenerate the ion exchange resin. The method for the on-line recovery of ion exchange resin can realize the on-line recovery of the ion exchange resin and has good recovery effect, the recovery solution cost is reduced, and the use cycle of the ion exchange resin is prolonged.

The invention relates to a regeneration method for an ion exchange resin, wherein, the ion exchange resin includes a cation exchange resin and an anion exchange resin. The method mainly comprises two steps that: a desorption solution is introduced into an ion exchange column containing ion exchange resin for removing the impurity ions absorbed on or firmly combined with the resin; a regeneration solution counter current is introduced into the ion exchange column for restoring the ion exchange ability of the ion exchange resin. The desorption solution and the regeneration solution adopts forward current and counter current modes respectively to be introduced into the ion exchange column one after another. By adopting the combining mode of forward and counter currents, the regenerated ion exchange resin can be effectively dispersed and equally dispersed in the ion exchange column, thus improving the column efficiency of the column exchange column and good for environment at the same time of reducing energy consumption and production cost.

The invention discloses a membraneless electrodeionization method and a system thereof, which are capable of directly exhausting oxygen gas and hydrogen gas outwards. A gas exhaust opening is connected with a gas exhaust valve; a spring, an upper porous support plate, an upper electrode, a water distributor with micropores, a lower electrode and a lower porous support plate are sequentially placed in an insulated cavity body from the top to the bottom; an outlet of the water distributor is connected with a water purification box via a water purification valve; ion exchange resin is filled between the two electrodes; the upper electrode is fixed on the lower surface of the upper porous support plate, and the lower electrode is fixed on the upper surface of the lower porous support plate; atop cover is sealed with a cylinder-shaped housing, and a bottom cover is sealed with the lower end surface of the cylinder-shaped housing; the upper porous support plate is sealed with the upper endsurface of the cylinder-shaped housing; and the two electrodes are respectively connected with a direct current power source. In a regeneration process, gas produced on the two electrodes is exhausted outwards from the two ends of a membraneless electrodeionization device, so that gas products cannot be accumulated in a resin layer. The membraneless electrodeionization method and the system thereof are suitable for the preparation of high purity water, the purification of electroplating and rinsing wastewater containing heavy metal ions, and the like, and the treatment of other water and wastewater, which aims for ionic impurity removal.

Systems and methods for recharging zirconium phosphate and zirconium oxide in reusable sorbent modules are provided. The systems and methods provide for recharging any combination of zirconium phosphate and/or zirconium oxide sorbent modules. The systems and methods also provide for linkage of multiple rechargers for sharing of infrastructure.

An improved process for cleaning weak acid cation exchange resin intermediates resulting in finished weak acid resins providing enhanced performance of mixed-bed water-treatment systems is disclosed. The cleaning process involves selected steam treatment during the manufacturing process of the resins and is applicable to weak acid cation exchange resins in general that are used as components in potable water treatment systems, such as cartridge-water-pitcher systems.

The invention relates to a process for purifying and treating vanadium-containing wastewater in an advanced manner and a process for recycling vanadium and chromium, and belongs to the field of sewage treatment.The process for purifying and treating the vanadium-containing wastewater in the advanced manner includes regulating a pH (potential of hydrogen) value of the vanadium-containing wastewater until the pH value reaches 4-6, sequentially adsorbing the vanadium-containing wastewater by the aid of resin A and resin B which are used as adsorption media; draining tail liquid which reaches standards and is obtained after the vanadium-containing wastewater is adsorbed.The resin A is chelating ion exchange resin; the resin B is macroporous weakly basic anion exchange resin with polyamine.The processes have the advantages that the process for purifying and treating the vanadium-containing wastewater is a novel, efficient and low-cost technology for treating heavy metal wastewater, the requirement on harmlessness and resource recovery (valuable heavy metal recycling) of the vanadium-containing wastewater and the requirement on water recycling and reusing can be simultaneously met, the processes are novel environment-friendly emission reduction and resource recycling technologies, 'cleaner production' standards implemented for vanadium metallurgy and vanadium application industries can be improved, and the processes have obvious economic and social benefits.

A method is disclosed for treating a flushing solution from an ion exchanger used in electroplating operations by co-precipitating or selectively precipitating out metal hydroxides derived from metal ions from the structures being plated in the electroplating bath, metal ions from the electrodes use in the electroplating bath and metal ions from the plating metal used in the electroplating bath, and a pH raising agent having a cation with a valence of at least 2. After the metals are precipitated out of the flushing solution, the flushing solution is aerated with carbon dioxide to precipitate out the cation from the pH raising agent as a carbonate. The carbonate precipitate is removed from the flushing solution and the resulting solution consists essentially of water that may be recycled for use in the electroplating plant or safely discharged into the environment.

A performance-lowered ion exchanger hard to recover in performance by the conventional regeneration (ion exchange resin, ion exchange membrane, or the like) is endowed with the same electric charge as the electric charge of the ion exchanger. A performance-lowered ion exchanger hard to recover in performance by the conventional regeneration owing to adsorption thereon of a charged substance is endowed with an electric charge opposite to that of the charged substance. According to the foregoing operations, the ion exchangers are recovered in performance. At least one compound selected from among organic amine compounds and organic ammonium compounds, which are capable of being endowed with an electric charge through dissociation thereof in solution, is preferably used as a rejuvenation agent for an anion exchanger.

Methods, systems and apparatus are provided for purging an adsorptive material of entrapped particulates. Methods, systems and apparatus rely upon a reverse loop for reversing the flow of medium within an adsorption material, allowing particulates caught within the adsorption material to be preferentially moved through and out of the adsorption material.

The invention provides an extracorporeal upflow regeneration process for ion exchange resin. The process includes the following steps that firstly, soft water is produced, and meanwhile exhausted resin is continuously discharged from the lower portion of an ion exchanger; secondly, the exhausted resin is conveyed to a gathering tank through injection, conveying fluid is drained from the upper portion of the gathering tank, and the exhausted resin is discharged from the bottom of the gathering tank and enters a regeneration tank; thirdly, regeneration fluid flows into the lower portion of the regeneration tank, upflow regeneration is conducted on the exhausted resin, and regenerated resin is discharged from the bottom of the regeneration tank and enters a cleaning tank; fourthly, water flows into the lower portion of the cleaning tank, the regeneration fluid left on the regenerated resin is reversely cleaned away, and the cleaned regenerated resin is discharged from the bottom of the cleaning tank and is conveyed back to the ion exchanger through injection. According to the process, the soft water can be continuously produced, energy consumption is reduced, and the equipment utilization rate is increased.

The invention discloses a chromic acid wastewater treatment method which comprises the following steps: performing ion exchange on chromic acid wastewater and anion and cationic resins, and treating wastewater generated by backwashing and regenerating the anion and cationic resins with saturated exchange capacity in a diaphragm electrolytic cell. The invention also discloses a chromic acid wastewater treatment system used for treating the chromic acid wastewater generated in a production system. The chromic acid wastewater treatment system comprises an anode resin tank, a cathode resin tank, a regenerating and backwashing wastewater collection tank, a reclaimed water storage tank, the diaphragm electrolytic cell, a purification tank, a cathode regenerated liquid storage tank and an anode regenerated liquid storage tank, wherein the diaphragm electrolytic cell is used for performing electrolytic treatment on the mixed waste liquid and comprises a cell body, an ion diaphragm is arranged in the cell body, and the cell body is separated into an inner cell and an outer cell through the ion diaphragm; a cathode plate is arranged in the inner cell; an anode plate is arranged in the outer cell; the cathode regenerated liquid storage tank is used for storing a strong base solution; the liquid inlet of the production system is respectively connected with the regenerated water storage tank and the purification tank; the chromic acid wastewater outlet of the production system is respectively connected with each anode resin tank. The chromic acid wastewater treatment method and system are used for occasions of generating chromic acid wastewater in electroplating industry and the like.

The invention discloses a regeneration method of decolorizing resin. The method comprises the following steps: firstly, cleaning a decolorizing resin column with fresh water with the volume being 1 to 2 times of that of the resin, then cleaning the decolorizing resin column with sodium hydroxide solution, pushing out liquid sodium hydroxide with compressed air, and then washing with water; secondly, leading in sodium chloride solution, soaking, then pushing out the sodium chloride solution with compressed air, repeating the process for 1 to 3 times, and finally washing with water. The invention further provides a recovery method of effluent brine during the regeneration process. The regeneration method can guarantee the regeneration effect of resin under the condition that the use level of sodium chloride is greatly reduced, greatly reduces the production cost, further reduces the discharge of brine, is environment-friendly, and has a very good industrial application prospect.