GB1318794A - Treatment of an aqueous waste stream - Google Patents
Treatment of an aqueous waste streamInfo
- Publication number
- GB1318794A GB1318794A GB1318794DA GB1318794A GB 1318794 A GB1318794 A GB 1318794A GB 1318794D A GB1318794D A GB 1318794DA GB 1318794 A GB1318794 A GB 1318794A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stream
- stream containing
- aqueous
- polysulphide
- sulphur
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/06—Preparation of sulfur; Purification from non-gaseous sulfides or materials containing such sulfides, e.g. ores
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
1318794 Waste water treatment UNIVERSAL OIL PRODUCTS CO 22 Oct 1970 50116/70 Heading C1C A method of treating an aqueous waste stream containing NH 4 HS comprises (a) Catalytically treating the stream with oxygen under oxidizing conditions to produce an effluent stream containing NH 4 OH, (NH 4 ) 2 S 2 O 3 , elemental sulphur and ammonium polysulphide; (b) Recovering from (a) an aqueous stream containing (NH 4 ) 2 S 2 O 3 ; (c) Mixing this stream with a stream containing H 2 S, (NH 4 ) 2 S or NH 4 HS and subjecting the mixture to reducing conditions thereby producing a stream containing a minor amount of ammonium polysulphide; (d) Subjecting the stream from (c) to polysulphide reducing conditions to produce an overhead stream containing NH 3 , H 2 S and H 2 O and an aqueous bottom stream containing elemental sulphur; and (e) Separating the sulphur, forming an aqueous stream free of thiosulphate and sulphur. In a modification of the above method, the oxidizing conditions include a mole ratio of O 2 to NH 4 HS of less than 0À5 : 1, thereby producing an aqueous effluent stream containing ammonium polysulphide and a minor amount of (NH 4 ) 2 S 2 O 3 and step (b) comprises subjecting the effluent stream from step (a) to polysulphide decomposition conditions to produce an overhead stream containing NH 3 , H 2 S and H 2 O and an aqueous bottom stream containing elemental sulphur and (NH 4 ) 2 S 2 O 3 , and separating sulphur from the bottom stream to recover a stream containing (NH 4 ) 2 S 2 O 3 . The catalyst used in step (a) may be phthalocyanines or metal (e.g. iron) sulphides. The sulphidecontaining stream utilized in step (c) may be an H 2 S-rich stream recovered from the products of a hydrocarbon conversion process, or the overhead stream containing NH 3 , H 2 O and H 2 S resulting from the decomposition of ammonium polysulphide in step (b) in the modified method above. The reduction conditions utilized in step (c) include a temperature of 93-371‹ C., a pressure sufficient to maintain part of the aqueous stream in the liquid phase, and a contact time of from 0À01 to 2 hr.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5011670 | 1970-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1318794A true GB1318794A (en) | 1973-05-31 |
Family
ID=10454714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1318794D Expired GB1318794A (en) | 1970-10-22 | 1970-10-22 | Treatment of an aqueous waste stream |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1318794A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031166A (en) * | 2021-11-03 | 2022-02-11 | 中海油天津化工研究设计院有限公司 | Heterogeneous catalytic oxidation sulfide-containing sewage treatment method |
-
1970
- 1970-10-22 GB GB1318794D patent/GB1318794A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114031166A (en) * | 2021-11-03 | 2022-02-11 | 中海油天津化工研究设计院有限公司 | Heterogeneous catalytic oxidation sulfide-containing sewage treatment method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |