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 Title: |
US6054050:
Process for removing organic and inorganic contaminants from refinery wastewater streams employing ultrafiltration and reverse osmosis
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Dyke, Charles A.; Glenham, NY
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| Assignee: |
Texaco Inc., White Plains, NY
other patents from TEXACO INC. (569900) (approx. 4,410)
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| Published / Filed: |
2000-04-25
/ 1998-07-21
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| Application Number: |
US1998000120089
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| IPC Code: |
Advanced:
B01D 61/04;
B01D 61/58;
C02F 1/44;
C02F 1/42;
Core:
B01D 61/02;
more...
IPC-7:
B01D 61/58;
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| ECLA Code: |
B01D61/04; B01D61/58; C02F1/44;
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| U.S. Class: |
Current:
210/639;
210/641;
210/650;
210/652;
210/669;
210/774;
210/791;
210/806;
Original:
210/639;
210/641;
210/650;
210/652;
210/669;
210/774;
210/791;
210/806;
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| Field of Search: |
210/639,641,650,651,652,654,663,669,687,799,806,774,175,409,791,797,275,792,794
208/179,187
203/010,14
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| Priority Number: |
| 1998-07-21 |
US1998000120089 |
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| Abstract: |
A process for removing soluble and insoluble organic and inorganic contaminants from refinery wastewater streams employing ultrafiltration and reverse osmosis is provided. Permeate from the ultrafiltration step is first passed through a sequential softening system to remove divalent and trivalent metal cations prior to being passed to the reverse osmosis step to prevent fouling therein.
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| Attorney, Agent or Firm: |
Delhommer, Harold J.Dilworth & Barrese ;
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| Primary / Asst. Examiners: |
Drodge, Joseph W.;
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| Maintenance Status: |
E1 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
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| Designated Country: |
AE AL AM AP AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EA EE EP ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG
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| Family: |
Show 3 known family members
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First Claim:
Show all 19 claims |
What is claimed is:
1. A process for treating a refinery wastewater stream containing soluble and insoluble organic and inorganic contaminants including divalent and trivalent metal cations to reduce the concentration of contaminants present therein which comprises:
- a) passing the refinery wastewater stream into contact with the high pressure side of an ultrafiltration membrane to remove insoluble contaminants present therein and recover from the low pressure side of the ultrafiltration membrane an ultrafiltration permeate;
- b) passing the ultrafiltration permeate through a sequential softening system to remove divalent and trivalent metal cations present therein and provide a reverse osmosis feedwater;
- c) subjecting the reverse osmosis feedwater to a pH adjustment to stabilize the solubility of the soluble organic contaminants and provide a pH adjusted reverse osmosis feedwater; and,
- d) passing the pH adjusted reverse osmosis feedwater into contact with the high pressure side of a reverse osmosis membrane to remove soluble contaminants present therein and recover from the low pressure side of the reverse osmosis membrane a reverse osmosis permeate having a reduced concentration of soluble and insoluble organic and inorganic contaminants.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 11 U.S. patent(s) that reference this one
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