US20200055022A1 - Highly porous coolant conditioning and remediation media - Google Patents

Highly porous coolant conditioning and remediation media Download PDF

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Publication number
US20200055022A1
US20200055022A1 US16/539,650 US201916539650A US2020055022A1 US 20200055022 A1 US20200055022 A1 US 20200055022A1 US 201916539650 A US201916539650 A US 201916539650A US 2020055022 A1 US2020055022 A1 US 2020055022A1
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Prior art keywords
pores
polymer resin
coolant
beads
ion exchange
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US16/539,650
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Matthew Hobbs
Peter T Dufresne
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1441413 Alberta Inc dba Ept
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1441413 Alberta Inc dba Ept
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B01D15/08—Selective adsorption, e.g. chromatography
    • B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
    • B01D15/36—Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction
    • B01D15/361—Ion-exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
    • B01J20/267—Cross-linked polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28078—Pore diameter
    • B01J20/28085—Pore diameter being more than 50 nm, i.e. macropores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J39/00—Cation exchange; Use of material as cation exchangers; Treatment of material for improving the cation exchange properties
    • B01J39/04—Processes using organic exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
    • B01J41/04—Processes using organic exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/014—Ion-exchange processes in general; Apparatus therefor in which the adsorbent properties of the ion-exchanger are involved, e.g. recovery of proteins or other high-molecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/02—Column or bed processes
    • B01J47/022—Column or bed processes characterised by the construction of the column or container
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/74—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0008—Working-up used lubricants to recover useful products ; Cleaning with the use of adsorbentia
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0075—Working-up used lubricants to recover useful products ; Cleaning synthetic oil based
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/06—Working-up used lubricants to recover useful products ; Cleaning by ultrafiltration or osmosis
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/003—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/0405—Phosphate esters used as base material

Definitions

  • the present invention is a solid and unusually porous medium for use in conditioning or remediating industrial cooling fluids such as glycol(s) used in antifreeze or heat exchange applications.
  • Coolant analysis and a variety of filtration or conditioning systems are generally used to monitor and maintain coolant condition, respectively.
  • cooling fluid contaminant and degradation levels are generally monitored using coolant analysis.
  • Common test methods include (but are not limited to): metal levels, anion chromatography for corrosives, pH analysis, glycol content and evaluation of coolant color/appearance. The latter test can be used to subjectively gauge the level of erosive ultrafine solids that have accumulated. Objective measurement of these ultrafine colloids can also be accomplished by visible absorption spectroscopy, however, this methodology is not widely employed. Many operators, therefore, have no basis for trending the presence of erosive ultrafines in their cooling fluids.
  • prior art includes mechanical filtration systems, adsorbents and treatment systems employing solid ion exchange media of, relatively, limited porosity. The latter are used to remove acidic degradation products, corrosive species and metals from glycol-based cooling fluids and their utility in this regard is explored in Wiebe, René D. “Ion-Exchange Coolant Recycling Meets ASTM Proposed Specifications.” SAE Transactions 103 (1994): 823-44. These resins contain relatively small pores to increase the solid media's surface area available for ion exchange.
  • Coolant metal and corrosive anion levels have been effectively managed for many years using the above discussed prior art. Ultrafine erosive solids cannot, however, be effectively addressed using these previously disclosed technologies. Through the use of visible absorption spectroscopy, the extent of coolant colloid/ultrafine problems has become obvious and the root cause of many costly industrial failures has been linked to these contaminants. Prior to the present invention, a need, therefore, remained to develop coolant filtration, treatment or conditioning systems able to remove harmful ultrafine colloids from glycol-based cooling fluids and analogous contaminants from other industrial fluids of a generally similar nature.
  • the present invention is a cooling fluid filtration and conditioning system which uses ion exchange resin or a mixture of ion exchange resins in which the pore size of at least some of the resin is significantly (on the order of two times or more) greater than the pores of prior art filters and resins.
  • ion exchange resins featuring unusually large pores was, heretofore, counterintuitive since their large pore volume limits the surface area available for ion exchange/contaminant-removal.
  • the ion exchange resins of the present invention are relatively inefficient acid, anion and metal scavengers relative to those of the prior art.
  • the inventive ion exchange resins featuring unusually large pore sizes are, however, surprisingly able to capture and retain extremely fine (smaller than 1-4 ⁇ m in diameter) particles (including erosive colloids) from coolants.
  • the ion exchange resin's unusually large pores may also be able to capture and retain ultrafine soot, coke, organic or scale particles.
  • the highly porous ion exchange resins of the present invention can capture, retain and remove these fine insoluble contaminants and breakdown products (colloids, soot, coke, organics, scale etc.) in a way that conventional mechanical filtration media having the same interstitial dimensions (1-4 ⁇ m, for instance) cannot.
  • the present large-pore ion exchange resins do not appear to function as simple sieves. This suggests that the three-dimensionally highly porous structure of the polymer ion exchange resin medium plays a significant role in the efficient capture and retention of fine insoluble coolant contaminants and breakdown products. By using the present invention, the risk of cooling fluid condition-related costly industrial equipment failures can be effectively mitigated.
  • the present invention comprises an unusually porous ion exchange resin for use in cooling fluid remediation and conditioning.
  • the unusually porous ion exchange resins of the present invention typically take the form of macroporous polymer beads having a bead size of 300-1,500 ⁇ m.
  • the cooling fluid is brought into contact with the inventive ion exchange resins either during cleaning periods or while the fluid is in-service.
  • the pores of the present ion exchange resins are on the order of two times or more larger than the typical median pore sizes of ion exchange resins already known in the art (as measured by mercury porosimetry).
  • typical prior art resin beads have median pore sizes of on the order of 400-900 ⁇
  • the present invention large-pore ion exchange resins have median pore sizes beginning on the order of 1500 ⁇ and up to 40,000 ⁇ or even up to 60,000-100,000 ⁇ .
  • the inventors also believe that ion exchange resins featuring a median pore size between 1500-100,000 ⁇ will give new and unexpectedly improved coolant contaminant and breakdown product removal results compared with resins having smaller (or, ostensibly, larger) pores than those within that stated range.
  • FIG. 1 is a sectional view of an array configured for axial flow.
  • FIG. 2 is a sectional view of an array configured for radial flow.
  • FIG. 3 is a plan view of a bulk treatment vessel containing the present medium, with an inlet and outlet for fluid flow.
  • the present inventive ion exchange resins feature unusually large pore sizes, allowing for the, heretofore, impossible capture of fine coolant contaminants and breakdown products (colloids, soot, coke, organics, scale etc.). These contaminants and degradation products are typically less than 1-4 ⁇ m in size and, therefore, difficult or impossible to remove via sieve-type techniques described within the prior art.
  • the present inventive resins allow for the efficient removal of ultrafine coolant contaminants and breakdown products. These deleterious species enter the relatively larger pores of the inventive ion exchange resins where they are then captured and retained.
  • Typical polymer resins meant for use in the present invention are (without limitation): polystyrene (including cross-linked polystyrenes), polyurethane, epoxy, polyvinyl, vinyl ester, divinylbenzene or acrylic resins of virtually any type as long as they are polymers in the generally understood plastic family.
  • These polymeric resins may be functionalized to form anionic or cationic exchange resins or the polymer may remain unfunctionalized.
  • the use of functionalized anion or cation exchange resins may, however, enhance the solid medium's ability to remove other undesirable contaminants and breakdown products (acids, metals, corrosive anions etc.) from coolants.
  • the present invention focuses on the, heretofore, difficult or impossible removal of ultrafine cooling fluid contaminants and breakdown products (colloids, soot, coke, organics, scale etc.) at the expense of the inventive media's acid/metal/anion-removal capabilities.
  • the prior art necessity of contaminant-removal remains important. Fortunately, it is possible to functionalize the present larger-pore ion exchange resins with chemical moieties to address these contaminants. It is equally feasible to combine the present larger-pore ion exchange resins (be they functionalized or not) with other ion exchange resins whose pore sizes are smaller and contaminant-removal capacities are concomitantly greater.
  • inventive ion exchange resin with more conventional prior art resins may be accomplished by mixing or layering two or more types of ion exchange resin beads. It is generally desirable to combine about 75% (w/w) of the inventive “large-pore” ion exchange resins with about 25% (w/w) of the traditional ion exchange resins; it is equally tenable that the mixture or layering can be about 50% of each. After one understands the different mechanisms by which the inventive and prior art ion exchange resins work (as described herein), the choice of ratio has to do with the need for anion/metal-removal vs.
  • the inventive core is the insight into using ion exchange resins having relatively larger (on the order of two times or more) pores to trap ultrafine coolant contaminants and breakdown products including colloids, soot, coke, organics, scale (which have, heretofore, not been adequately quantified and trended but, nevertheless, led to avoidable equipment failures, downtime and premature cooling fluid replacement).
  • FIG. 1 a sectional view of a portion of pipe 10 typical of a cleaning loop in a coolant system is shown in section with a cartridge 12 in place.
  • the cartridge 12 is a section of the pipe in which two barriers 14 , typically a pored screen or mesh, are positioned both upstream and downstream of a quantity of porous beads 16 of solid medium according to the invention.
  • the beads are enlarged in the Figure for illustration purposes and therefore are not shown to scale.
  • the pores or mesh screen holes in the barrier 14 need only to be smaller than the smallest size of the beads 16 to hold them in their position within the cartridge 12 .
  • the cartridge 12 can be removed, for replacement of the beads 16 , via threaded fasteners 18 or an equivalent means of structural integrity including press-fit, epoxy sealing, welding, robotic sealing or any other means of construction.
  • One or more traditional particulate filters can be added at any point along the fluid flow, and are optional.
  • the section of pipe 10 can be placed in any convenient location in a coolant system, preferably in a location of easy access for maintenance (replacement of the solid medium beads).
  • FIG. 1 it is also beneficial to introduce a “kidney loop” format secondary to a primary filtration system or as part of a primary circulation system, especially for coolant remediation.
  • FIG. 2 shows an alternative configuration for radial flow, with the cartridge 22 , barrier 24 , beads 26 , an inlet pipe 20 and an outlet pipe 28 , all analogous to FIG. 1 .
  • FIG. 3 is a plan view of a bulk treatment alternative, in which a vessel 30 holds the beads 36 of the present invention, which can be charged to the container via hatch 32 , with the fluid flow entering via pipe 31 and exiting via pipe 33 .
  • the vessel contains an optional domed lid hatch 32 which can be used as an alternate access point for adding or removing the present beads.
  • the beads shown to scale are the beads shown to scale.
  • Cooling fluid applications can contain from 400 to 200,000 gallons of coolant, typically, or even less or more than that, and the associated media needed according to the invention increases or decreases proportionately. The amount of media needed also varies as a function of the condition of the fluid to be treated. Fluids containing very high levels of contaminants will require concomitantly more media.
  • the types of coolants that can be conditioned or remediated in the present invention are glycol-based cooling fluids and aqueous mixtures of glycol-based cooling fluids.
  • the present invention accommodates a wide variety of media amounts and fluid systems, and those skilled in the art learning from this specification to use the disclosed media with relatively much larger pores will easily be able, without undue experimentation, to determine how much porous resin media to use and how often to replace it.
  • a typical installation for a 50:50 water/ethylene glycol system could include, without limitation, two cartridges 1 foot in diameter each and 20 inches in length containing the beads of the present disclosure (any of the 100% inventive beads, 50% inventive beads and 50% prior art beads or other media beads, or the above-described 75% inventive beads and 25% prior art or other media beads) to treat about 6,000 gallons of coolant.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Nanotechnology (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Lubricants (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US16/539,650 2018-08-14 2019-08-13 Highly porous coolant conditioning and remediation media Abandoned US20200055022A1 (en)

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AU (1) AU2019321074B2 (ja)
CA (1) CA3109588A1 (ja)
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CA1068666A (en) * 1975-02-18 1979-12-25 Laurence I. Peterson Pyrolyzed ion exchange resins containing metal salts
FR2313442A1 (fr) * 1975-06-04 1976-12-31 Inst Francais Du Petrole Traitement de finition sur resines adsorbantes pour huiles lubrifiantes regenerees
DE3380888D1 (en) * 1983-02-11 1989-12-28 Dow Chemical Co Method for removing cesium from an aqueous liquid, method for purifying the reactor coolant in boiling water and pressurized water reactors and a mixed ion exchanged resin bed, useful in said purification
JPH0791454B2 (ja) * 1987-05-20 1995-10-04 エヌオーケー株式会社 含油ポリウレタンエラストマー組成物の製造法
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JP2006523804A (ja) * 2003-04-16 2006-10-19 ダウ グローバル テクノロジーズ インコーポレイティド 圧縮機及びその他の装置の潤滑剤流体の精製及び状態の監視のためのシステム
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