GB1068942A - Improvements in the manufacture of sulphamic acid - Google Patents
Improvements in the manufacture of sulphamic acidInfo
- Publication number
- GB1068942A GB1068942A GB3053262A GB3053262A GB1068942A GB 1068942 A GB1068942 A GB 1068942A GB 3053262 A GB3053262 A GB 3053262A GB 3053262 A GB3053262 A GB 3053262A GB 1068942 A GB1068942 A GB 1068942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- excess
- acid
- oleum
- compartment
- recovered
- 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
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/087—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms
- C01B21/093—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms containing also one or more sulfur atoms
- C01B21/0935—Imidodisulfonic acid; Nitrilotrisulfonic acid; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/087—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms
- C01B21/093—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms containing also one or more sulfur atoms
- C01B21/096—Amidosulfonic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
<PICT:1068942/C1/1> Sulphamic acid is prepared by reacting urea with sulphur trioxide in a proportion which is not more than about 10% in excess of stoichiometric and sufficient excess sulphuric acid to form a free-flowing slurry containing not more than half its volume as solids while controlling the temperature between 70 DEG and 100 DEG C. Urea is continuously introduced at 8 into a mild steel vessel divided into compartments 1, 2 having agitators 5. Oleum, e.g. 24.7%, and when required H2SO4 are continuously introduced through 9, 10 to form a slurry and provide up to 10% excess SO3 and 100-200% excess H2SO4 over equimolar amounts. The slurry passes from compartment 1 through 3 to compartment 2 and after a total time 2-5 hours is withdrawn at 4. Sulphamic acid is recovered by centrifuging or vacuum filtration through glass cloth and is recrystallized from 1 : 4 water : mother liquor mixture. Ammonium bisulphate may be recovered from the filtrate which may alternatively be recycled with oleum to the reaction vessel. Fume off-take 6 may alternatively be packed and the acid passed down to absorb SO3, or be cooled to reflux SO3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3053262A GB1068942A (en) | 1962-08-09 | 1962-08-09 | Improvements in the manufacture of sulphamic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3053262A GB1068942A (en) | 1962-08-09 | 1962-08-09 | Improvements in the manufacture of sulphamic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1068942A true GB1068942A (en) | 1967-05-17 |
Family
ID=10309125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3053262A Expired GB1068942A (en) | 1962-08-09 | 1962-08-09 | Improvements in the manufacture of sulphamic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1068942A (en) |
-
1962
- 1962-08-09 GB GB3053262A patent/GB1068942A/en not_active Expired
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