IL44456A - Spent sulfuric acid purification process - Google Patents
Spent sulfuric acid purification processInfo
- Publication number
- IL44456A IL44456A IL44456A IL4445674A IL44456A IL 44456 A IL44456 A IL 44456A IL 44456 A IL44456 A IL 44456A IL 4445674 A IL4445674 A IL 4445674A IL 44456 A IL44456 A IL 44456A
- Authority
- IL
- Israel
- Prior art keywords
- acid
- sulfuric acid
- spent
- nitrogen oxides
- organic
- Prior art date
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims 7
- 238000000746 purification Methods 0.000 title 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims 9
- 238000000034 method Methods 0.000 claims 7
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims 4
- 239000002253 acid Substances 0.000 claims 3
- 150000001875 compounds Chemical class 0.000 claims 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 2
- 229910001506 inorganic fluoride Inorganic materials 0.000 claims 2
- 238000006396 nitration reaction Methods 0.000 claims 2
- 150000002894 organic compounds Chemical class 0.000 claims 2
- 229910052710 silicon Inorganic materials 0.000 claims 2
- 239000010703 silicon Substances 0.000 claims 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
- 229940009868 aluminum magnesium silicate Drugs 0.000 claims 1
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 claims 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims 1
- 235000011130 ammonium sulphate Nutrition 0.000 claims 1
- 125000003118 aryl group Chemical group 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- QULYNCCPRWKEMF-UHFFFAOYSA-N parachlorobenzotrifluoride Chemical compound FC(F)(F)C1=CC=C(Cl)C=C1 QULYNCCPRWKEMF-UHFFFAOYSA-N 0.000 claims 1
Landscapes
- Silicon Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Claims (7)
1. A process for purifying spent sulfuric acid derived from the nitration of an aromatic fluorine-containing compound and containing as impurities nitrogen oxides titratable as nitrous acid, organic compounds, and organic and inorganic fluorides, which comprises adding to said spent acid an amount of a compound capable of yielding nitrogen gas on reaction with nitrous acid sufficient to react with all of said nitrogen oxides present and a source of silicon sufficient to react with all of said organic and inorganic fluorides present, and then heating the resulting mixture to a temperature in the range 150-275 °C.
2. The process of claim 1, in which the treated spent acid is heated in the range 200-220 °C.
3. The process of claim 1, in which the heating is continued until the level of total fluoride is reduced to 30 ppm or less, and the percentage of nitrogen oxides titratable as nitrous acid and the level of organic compounds are reduced to 0.1 percent or less.
4. The process of claim 1, in which the spent acid is derived from the nitric-sulfuric acid nitration of p_-trifluoromethylphenylchloride .
5. The process of claim 1, in which the compound capable of yielding nitrogen gas on reaction with nitrous acid is ammonium sulfate.
6. The process of claim 1, in which the source of silicon is a complex aluminum magnesium silicate.
7. A process for purifying spent sulfuric acid substantially as hereinbefore described with particular reference to the examples .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL44456A IL44456A (en) | 1974-03-21 | 1974-03-21 | Spent sulfuric acid purification process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL44456A IL44456A (en) | 1974-03-21 | 1974-03-21 | Spent sulfuric acid purification process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL44456A0 IL44456A0 (en) | 1974-06-30 |
| IL44456A true IL44456A (en) | 1976-12-31 |
Family
ID=11047594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL44456A IL44456A (en) | 1974-03-21 | 1974-03-21 | Spent sulfuric acid purification process |
Country Status (1)
| Country | Link |
|---|---|
| IL (1) | IL44456A (en) |
-
1974
- 1974-03-21 IL IL44456A patent/IL44456A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IL44456A0 (en) | 1974-06-30 |
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