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 Title: |
US6071413:
Process for removing organic and inorganic contaminants from phenolic stripped sour water employing reverse omosis
[ 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: |
2000-06-06
/ 1999-01-13
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| Application Number: |
US1999000229854
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| IPC Code: |
Advanced:
B01D 24/02;
B01D 24/46;
B01D 61/02;
B01D 61/04;
C02F 1/24;
C02F 1/44;
C02F 5/00;
C02F 5/08;
C02F 5/10;
C02F 9/00;
C02F 9/08;
C02F 1/42;
C02F 1/66;
Core:
B01D 24/00;
more...
IPC-7:
B01D 61/00;
C02F 1/44;
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| ECLA Code: |
B01D61/04; C02F1/44B;
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| U.S. Class: |
Current:
210/651;
210/652;
210/669;
210/703;
210/806;
210/807;
210/912;
Original:
210/651;
210/652;
210/669;
210/703;
210/806;
210/807;
210/912;
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| Field of Search: |
210/651,652,663,665,669,688,696,703,704,705,737,806,807,904,912,687
208/252,251 R
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| Priority Number: |
| 1999-01-13 |
US1999000229854 |
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| Abstract: |
A reverse osmosis process for treating a phenolic stripped sour water stream containing soluble and insoluble contaminants is provided. Prior to passage through a reverse osmosis membrane, the phenolic stripped sour water stream is cooled, subjected to air flotation and filtered through a sand filtration system to remove insoluble contaminants, and passed through a water softener to remove divalent and trivalent metal cation contaminants. The pH of the stream is adjusted prior to the water softener, and again prior to the reverse osmosis membrane, to stabilize the solubility of soluble organic contaminants present within the stream.
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| Attorney, Agent or Firm: |
Delhommer, Harold J.Dilworth & Barrese ;
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| Primary / Asst. Examiners: |
Savage, Matthew O.; Ward, Richard 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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Family Legal Status Report
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| Designated Country: |
AE AL AM AP AZ BA BB BG BY CA CR CU CZ DM EA EE GD GE GH GM HR HU ID IL AT BE CH CY DE DK ES FI FR GB GR IE
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| Family: |
Show 12 known family members
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First Claim:
Show all 14 claims |
What is claimed is:
1. A process for treating phenolic stripped sour water containing soluble and insoluble organic and inorganic contaminants including selenium and divalent and trivalent metal cations to reduce the concentration of selenium therein which comprises:
- a) passing the phenolic stripped sour water through a cooling system to decrease the temperature of the phenolic stripped sour water and provide a cooled phenolic stripped sour water;
- b) passing the cooled phenolic stripped sour water through an air flotation system to remove insoluble contaminants present therein not greater than about 1.0 micron in size and provide a flotation stripped sour water;
- c) passing the flotation stripped sour water through a sand filtration system to remove any remaining insoluble contaminants present therein greater than about 1.0 micron in size and provide a filtered sour water;
- d) subjecting the filtered sour water to a first pH adjustment to stabilize the solubility of the soluble organic contaminants and provide a pH adjusted sour water;
- e) passing the pH adjusted sour water through a softener to remove divalent and trivalent metal cations present therein and provide a reverse osmosis sour water;
- f) subjecting the reverse osmosis sour water to a second pH adjustment to restabilize the solubility of the soluble organic contaminants and provide a pH adjusted reverse osmosis sour water; and,
- g) passing the pH adjusted reverse osmosis sour water into contact with the high pressure side of a reverse osmosis membrane to remove selenium present therein and recover from the low pressure side of the reverse osmosis membrane a reverse osmosis permeate having a reduced concentration of selenium.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 6 U.S. patent(s) that reference this one
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