Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1990-02-27
1992-12-29
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210668, 210669, 210685, 210694, C02F 900
Patent
active
051749025
ABSTRACT:
An apparatus and method for removing particulates, hydrcarbons (such as oil), cations and anions including nitrite ions from a liquid, such as an engine coolant liquid having a freezing point depressant and situated in an internal combination engine cooling system. The apparatus has at least one filter for removing particulates and hydrocarbons; a strong acid cation exchange bed in the hydrogen form for removing cations; a strong base anion exchange bed in the hydroxide form for removing anions; and separator for separating gas containing nitrogen, such as nitric oxide and/or nitrogen dioxide, that is produced in the cation exchange bed and/or the anion exchange bed. The method for removing particulates, hydrocarbons, cations, anions and nitrite ions from an engine coolant liquid having a freezing point depressant comprises providing an engine coolant liquid having particulates, hydrocarbons, cations, anions and nitrite ions; passing the engine coolant liquid through a zone for filtering wherein particulates and hydrocarbons are removed from the engine coolant liquid; and passing the engine coolant liquid through a strong acid cation exchanger bed in the hydrogen form wherein cations are removed from the engine coolant liquid and nitrite ions are converted into nitric oxide and/or nitrogen dioxide. The method further comprises passing the engine coolant liquid through a strong base anion exchanger bed in the hydroxide form wherein anions are removed from the engine coolant liquid; and subsequently separating the nitric oxide and/or nitrogen dioxide from the engine coolant liquid to produce an engine coolant liquid having the freezing point depressant.
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Myers Galen R.
Richardson Robert C.
Shubert David C.
BG Products, Inc.
Carpenter John W.
Cintins Ivars
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