DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL

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Terms, Acronyms, And Abbreviations Term Definition Uniform particle size Resin that has a very narrow range of particle sizes, normally with a uniformity coefficient of 1) of the 40% retention size and the 90% retention size determined from a particle size analysis. See Effective size. UPCORE Packed bed, counter-current regeneration technology in which process flow is downflow and regeneration is upflow after a compaction step. UPCORE (up′Ã� Ã� ) systems are self-cleaning, eliminating the need for backwash and increasing regeneration efficiency while minimizing leakage. A trademark of The Dow Chemical Company. Upflow Operation of an ion exchange column in which the regenerant enters the bottom of the ion exchange column and is withdrawn from the top. Regeneration efficiency and column leakage may be improved by this process. Valence Number of positive or negative charges of an ion. Void volume See Interstitial volume. Volume mean diameter ��Ã��Ã��Ã��Ã��Ã� ��Ã��Ã��Ã��Ã��Ã��Ã��Ã��ÈÃ�� size determined from a particle size analysis. Waste water Contaminated water that can often be recovered, cleansed of toxic or other undesirable elements, or otherwise purified with ion exchange processes. Water retention Amount of water, expressed as a percent of the wet weight, retained within and on the surface of a fully swollen and drained ion exchange material. Water softening Exchange of sodium for the hardness in water by ion exchange. Weak acid cation resin Used in dealkalization and desalination systems and in conjunction with strong acid cation resins for deionization. When regenerated with acid, the resin will split alkaline salts, converting the salt to carbonic acid. This resin exhibits very high regeneration efficiency. It usually receives its exchange capacity from carboxylic groups. Weak base anion resin Used to remove mineral acids from solution. These resins are employed in deionizers when silica removal is not required. When regenerated with soda ash, ammonia, or caustic soda, the resin adsorbs strong acids such as HCl and H2SO4 from the cation bed effluent. The resin usually receives its exchange capacity from tertiary amine groups. Well water Generally refers to water from a ground water source that has been accessed via a well. When the well is close to surface water, then significant portions of the water obtained may be from the surface water source. See Surface water. Wet volume capacity Amount of exchange capacity present in a unit volume of hydrated resin. Zeolite Mineral composed of hydrated silicates of aluminum and either sodium or calcium or both. The term is commonly used in connection with water softening by ion exchange (e.g., zeolite softener, hot lime zeolite, etc.). DOWEX Ion Exchange Resins 16 Water Conditioning Manual
Terms, Acronyms, And Abbreviations Table 2. Acronyms and abbreviations common to ion exchange. Acronym/ Abbreviation Definition A&E architect and engineer ASTM American Society for Testing and Materials AVT all volatile treatment BWR boiling water reactor CIP cleaning in place CP condensate polishing Da dalton degas degasifier demin demineralization DVB divinylbenzene DWC dry weight capacity FB free base FMA free mineral acidity GAC granular activated carbon gpm gallons per minute grpg grains per gallon H/A hardness to alkalinity ratio IX ion exchange kgr kilograins ME microscopic examination OEM original equipment manufacturer OF organic fouling OS organic scavenger ppb unit of concentration, parts per billion, equal to 1 µg/L ppm unit of concentration, parts per million, equal to 1 mg/L psi pounds per square inch psig pounds per square inch gauge PWR pressurized water reactor RO reverse osmosis SAC strong acid cation SBA strong base anion SBS sodium bisulfite SHMP sodium hexametaphosphate SMBS sodium metabisulfite spec specification SSC salt splitting capacity DOWEX Ion Exchange Resins 17 Water Conditioning Manual
Page 1 and 2: Dow Liquid Separations DOWEX Ion Ex
Page 3 and 4: TABLE OF CONTENTS 1 Introduction to
Page 5 and 6: TABLE OF TABLES Table 1. Terms comm
Page 7 and 8: Introduction to Ion Exchange 1 INTR
Page 9 and 10: Terms, Acronyms, And Abbreviations
Page 15: Terms, Acronyms, And Abbreviations
Page 19 and 20: Sodium Cycle Ion Exchange Process (
Page 27 and 28: Brackish Water Softening Using H2SO
Page 29 and 30: Brackish Water Softening Resin oper
Page 31 and 32: Dealkalization: Salt Splitting Proc
Page 33 and 34: Dealkalization: Weak Acid Cation Re
Page 35 and 36: Dealkalization: Weak Acid Cation Re
Page 37 and 38: Demineralization (Deionization) Pro
Page 39 and 40: Demineralization (Deionization) Pro
Page 41 and 42: The UPCORE Counter-Current Regenera
Page 47 and 48: Ion Exchange Resin Operational Info
Page 57 and 58: Ion Exchange Cleaning Procedures 10
Page 59 and 60: Ion Exchange Cleaning Procedures Re
Page 61 and 62: Ion Exchange Cleaning Procedures 10
Page 63 and 64: Ion Exchange Cleaning Procedures Ta
Page 65 and 66: Designing an Ion Exchange system fr
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Designing an Ion Exchange system As
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Designing an Ion Exchange system 11
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Useful Graphs, Tables, and Other In
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Index 14 INDEX A Abbreviations · 9
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Dow Liquid Separations Offices. For
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DOWEX Ion Exchange Resins WATER CONDITIONING MANUAL

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