Multi-stage engine coolant recycling apparatus and process
First Claim
1. A process for purifying engine coolant, comprising:
- a) providing engine coolant to be purified;
b) treating said coolant through a reverse osmosis process;
c) treating said coolant through a electrolysis deionization process; and
d) collecting purified coolant.
0 Assignments
0 Petitions
Accused Products
Abstract
A multi-stage apparatus and a process for recycling used engine coolant employs a combination of filtration, dissolved air floatation, centrifugation (hydrocyclone separation), semi-permeable nano filtration, reverse osmosis, and continuous deionization for separating ethylene glycol, with or without propylene glycol, and water from used engine coolant. The engine coolant is pre-filtered through a series of filters. The filters remove particulate contaminates. This filtered fluid is then subjected to dissolved air floatation and/or centrifugation to remove organic petroleum contaminants. Then, it is pressurized prior to being passed through semi-permeable nano filtration. The nano filtration separates the feed stream into a ultra filtration solution and a concentrated waste solution. The concentrate solution is returned to a centrifuged coolant tank for continuous circulation through the nano filtration device. The ultra filtration solution is pressurized and passed through a reverse osmosis device, which separates the feed stream into a permeate solution and a concentrated waste solution. The concentrated waste solution is returned to a ultra filtrate solution tank for continuous circulation through the reverse osmosis device. The permeate solution is subjected to final refining by continuous deionization which reduces ionic contaminants. Depending upon environmental conditions, a heater and/or heat exchanger maintain the temperature of the process solution within an optimum pre-established operating temperature range.
-
Citations
28 Claims
-
1. A process for purifying engine coolant, comprising:
-
a) providing engine coolant to be purified;
b) treating said coolant through a reverse osmosis process;
c) treating said coolant through a electrolysis deionization process; and
d) collecting purified coolant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
15. A process for purifying engine coolant comprising:
-
a) providing engine coolant to be purified;
b) filtering said coolant;
c) subjecting said coolant to dissolved air floatation;
d) removing particulate matter from said coolant by centrifugation;
e) filtering said coolant with semi-permeable nano filtration;
f) passing said coolant through a reverse osmosis process; and
g) passing said coolant through electrolysis deionization process.
-
-
16. A process for purifying engine coolant, comprising treating said coolant with a reverse osmosis process wherein a purified coolant meets ASTM standards as detailed in “
- D 3306-98 Standard Specification for Ethylene Glycol Base Engine Coolant for Automobile and Light Duty Service.”
- D 3306-98 Standard Specification for Ethylene Glycol Base Engine Coolant for Automobile and Light Duty Service.”
-
17. A process for purifying engine coolant, comprising treating said coolant with a reverse osmosis process wherein a purified coolant meets ASTM standards as detailed in “
- D 6210-98 Standard Specification for Fully-Formulated Ethylene-Glycol Base Engine Coolant for Heavy-Duty Engines.”
- D 6210-98 Standard Specification for Fully-Formulated Ethylene-Glycol Base Engine Coolant for Heavy-Duty Engines.”
-
18. An apparatus for purifying engine coolant, comprising:
-
a) a reverse osmosis separator through which said coolant is passed;
b) a electrolysis deionizer; and
c) a purified coolant collector.
-
Specification