GB941746A - Process for the concentration and desalting of dilute, saltcontaining sulphuric acid - Google Patents
Process for the concentration and desalting of dilute, saltcontaining sulphuric acidInfo
- Publication number
- GB941746A GB941746A GB3581361A GB3581361A GB941746A GB 941746 A GB941746 A GB 941746A GB 3581361 A GB3581361 A GB 3581361A GB 3581361 A GB3581361 A GB 3581361A GB 941746 A GB941746 A GB 941746A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- concentrated
- amount
- dilute
- 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
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
Abstract
Sulphuric acid is concentrated and desalted by admission of dilute acid to an evaporator, continuous removal of the acidic suspension, and filtering off the salts from the concentrated acid and partial recycling of the concentrated acid to the dilute initial acid solution, characterized in that the amount of concentrated acid recycled to the dilute acid is such that the salt content of the suspension in the evaporator does not amount to more than about 1000 grams per litre. An acid containing 16-22% H2SO4 may be concentrated to 63-68% H2SO4, and the salt concentration in the evaporator preferably does not exceed 700-900 grams per litre. The amount of acid added to the salt solution is equal to the amount of salt suspension drawn off from the evaporator. Salts referred to are: ferrous sulphate and sulphates generally.ALSO:Sulphuric acid is concentrated and desalted by admission of dilute acid to an evaporator, continuous removal of the acidic suspension, and filtering off the salts from the concentrated acid and partial recycling of the concentrated acid to the dilute initial acid solution, characterized in that the amount of concentrated acid recycled to the dilute acid is such that the salt content of the suspension in the evaporation does not amount to more than about 1000 grams per litre. An acid containing 16-22% by weight H2SO4 may be concentrated to 63-68% H2SO4, and the amount of solid material in the evaporation should preferably not exceed 700-900 grams per litre. The amount of acid added to the salt solution is equal to the amount of salt suspension drawn off from the evaporator. Salts referred to are: ferrous sulphate and sulphates generally.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF32340A DE1131193B (en) | 1960-10-14 | 1960-10-14 | Process for concentrating and desalting dilute, salty sulfuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB941746A true GB941746A (en) | 1963-11-13 |
Family
ID=7094591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3581361A Expired GB941746A (en) | 1960-10-14 | 1961-10-04 | Process for the concentration and desalting of dilute, saltcontaining sulphuric acid |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE608729A (en) |
| DE (1) | DE1131193B (en) |
| GB (1) | GB941746A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2618122A1 (en) * | 1976-04-26 | 1977-11-10 | Kronos Titan Gmbh | Sulphuric acid mfr. by two stage concentration - and removal of pptd. metal salts |
| FR2403973A1 (en) * | 1977-09-21 | 1979-04-20 | Montedison Spa | PROCESS FOR CONCENTRATION OF AQUEOUS SOLUTIONS OF SULFURIC ACID |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2618121A1 (en) * | 1976-04-26 | 1977-11-10 | Kronos Titan Gmbh | Sulphuric acid demetallisation in titanium dioxide pigment mfr. - by continuous addn. to metal salt suspension in conc. acid and evapn. |
| DE2729756A1 (en) * | 1977-07-01 | 1979-01-11 | Kronos Titan Gmbh | CONCN. AND PURIFICN. OF SULPHURIC ACID FROM TITANIUM DI:OXIDE MFR. - by boiling in presence of ferrous sulphate to remove chromium |
| CN108562107B (en) * | 2018-03-30 | 2021-07-23 | 海尔智家股份有限公司 | Refrigerator with a door |
-
1960
- 1960-10-14 DE DEF32340A patent/DE1131193B/en active Pending
-
1961
- 1961-10-02 BE BE608729A patent/BE608729A/en unknown
- 1961-10-04 GB GB3581361A patent/GB941746A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2618122A1 (en) * | 1976-04-26 | 1977-11-10 | Kronos Titan Gmbh | Sulphuric acid mfr. by two stage concentration - and removal of pptd. metal salts |
| FR2403973A1 (en) * | 1977-09-21 | 1979-04-20 | Montedison Spa | PROCESS FOR CONCENTRATION OF AQUEOUS SOLUTIONS OF SULFURIC ACID |
Also Published As
| Publication number | Publication date |
|---|---|
| BE608729A (en) | 1962-02-01 |
| DE1131193B (en) | 1962-06-14 |
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