GB1443878A - Method of processing spent aqueous sulphuric acid liquor - Google Patents
Method of processing spent aqueous sulphuric acid liquorInfo
- Publication number
- GB1443878A GB1443878A GB3003574A GB3003574A GB1443878A GB 1443878 A GB1443878 A GB 1443878A GB 3003574 A GB3003574 A GB 3003574A GB 3003574 A GB3003574 A GB 3003574A GB 1443878 A GB1443878 A GB 1443878A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- hot
- gases
- fuel
- evaporator
- 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
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/58—Recovery of sulfur dioxide from acid tar or the like or from any waste sulfuric acid
Abstract
1443878 H 2 SO 4 processing METALLGESELLSCHAFT AG 5 July 1974 [7 Aug 1973] 30035/74 Heading C1A Spent aqueous sulphuric acid liquor which contains substantially inorganic impurities and up to 40% by weight of H 2 SO 4 , is processed by treating with hot H 2 SO 4 -decomposition gases so that water is evaporated from the liquor by direct heat exchange to give an H 2 SO 4 content of not more than 65% by weight, and forming water-vapour laden exhaust gases of temperature 80-100 C.; the hot H 2 SO 4 -decomposition gases are generated by heating the concentrated H 2 SO 4 liquor to 800-1100 C. in a fluidized bed using oxygen-enriched air and a fuel. In the Figure, spent H 2 SO 4 liquor is introduced via 5 into a spray evaporator 3 where it is contacted countercurrently with H 2 SO 4 -decomposition gases introduced via 6. The pre-concentrated liquor formed flows via 7 to a pump receiver 8, and from there via 9 to a second spray-evaporator 4, where it is conducted co-currently with H 2 SO 4 -decomposition gases introduced via 10 from hot cyclone 2. From 4, the spent H 2 SO 4 liquor (now containing up to 65% by weight of H 2 SO 4 ) is passed via 11 to a second pump receiver 12, and from thence via 13 to charging lances by which it is introduced into the fluidized bed of reactor 1. O 2 -enriched air is introduced into 1 via conduit 14, while fuel (e.g. fuel oil, fuel gas, FeS 2 , sulphur) is introduced via lance 15. Dust from the H 2 SO 4 -decomposition gases from 1 is collected in the hot cyclone 2, while the gases enter the spray evaporator 4 via conduit 10. The hot, moist exhaust gases from the process leave the spray evaporator B via conduit 17.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732339859 DE2339859A1 (en) | 1973-08-07 | 1973-08-07 | PROCESS FOR PROCESSING WASTE Aqueous SULFUR ACID |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1443878A true GB1443878A (en) | 1976-07-28 |
Family
ID=5889065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3003574A Expired GB1443878A (en) | 1973-08-07 | 1974-07-05 | Method of processing spent aqueous sulphuric acid liquor |
Country Status (11)
Country | Link |
---|---|
BE (1) | BE818560A (en) |
DE (1) | DE2339859A1 (en) |
ES (1) | ES427151A1 (en) |
FI (1) | FI201274A (en) |
FR (1) | FR2240182A1 (en) |
GB (1) | GB1443878A (en) |
IT (1) | IT1017857B (en) |
NL (1) | NL7407475A (en) |
NO (1) | NO741780L (en) |
RO (1) | RO65627A (en) |
ZA (1) | ZA744248B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1310734A3 (en) * | 2001-11-13 | 2003-12-03 | MESSER GRIESHEIM GmbH | Method for increasing the efficiency of exothermal combustion of waste materials |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2710978A1 (en) * | 1977-03-12 | 1978-09-21 | Metallgesellschaft Ag | METHOD FOR THERMAL CLEAVING OF PRIMARY SALTS CONTAINING IRON SULFATE |
CH677933A5 (en) * | 1989-04-07 | 1991-07-15 | Escher Wyss Ag | |
DE4403840C2 (en) * | 1994-02-08 | 1997-12-04 | Bayer Ag | Process for the recovery of sulfuric acid from used sulfates containing metal sulfate |
AU709404B2 (en) * | 1995-07-24 | 1999-08-26 | Kerr-Mcgee Pigments Gmbh & Co. Kg | Process for the recovery of sulphuric acid from spent acids containing metal sulphates |
FI103517B (en) * | 1997-12-09 | 1999-07-15 | Outokumpu Oy | Process for the thermal dissolution of hydrochloric acid |
DE10055343A1 (en) * | 2000-11-08 | 2002-05-29 | Messer Griesheim Gmbh | Process for the production of SO2 from gas containing H2S |
-
1973
- 1973-08-07 DE DE19732339859 patent/DE2339859A1/en active Pending
-
1974
- 1974-05-15 NO NO741780A patent/NO741780L/no unknown
- 1974-05-27 FR FR7418251A patent/FR2240182A1/fr not_active Withdrawn
- 1974-06-04 NL NL7407475A patent/NL7407475A/en not_active Application Discontinuation
- 1974-06-10 ES ES427151A patent/ES427151A1/en not_active Expired
- 1974-07-01 FI FI2012/74A patent/FI201274A/fi unknown
- 1974-07-02 ZA ZA00744248A patent/ZA744248B/en unknown
- 1974-07-05 GB GB3003574A patent/GB1443878A/en not_active Expired
- 1974-08-01 RO RO7479639A patent/RO65627A/en unknown
- 1974-08-02 IT IT25921/74A patent/IT1017857B/en active
- 1974-08-06 BE BE6044709A patent/BE818560A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1310734A3 (en) * | 2001-11-13 | 2003-12-03 | MESSER GRIESHEIM GmbH | Method for increasing the efficiency of exothermal combustion of waste materials |
Also Published As
Publication number | Publication date |
---|---|
ZA744248B (en) | 1975-06-25 |
IT1017857B (en) | 1977-08-10 |
NL7407475A (en) | 1975-02-11 |
FI201274A (en) | 1975-02-08 |
DE2339859A1 (en) | 1975-02-27 |
NO741780L (en) | 1975-03-03 |
BE818560A (en) | 1975-02-06 |
AU7137174A (en) | 1976-01-22 |
RO65627A (en) | 1980-06-15 |
FR2240182A1 (en) | 1975-03-07 |
ES427151A1 (en) | 1976-07-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |