PL416787A1 - Method for purification of waste sulfuric acid - Google Patents
Method for purification of waste sulfuric acidInfo
- Publication number
- PL416787A1 PL416787A1 PL416787A PL41678716A PL416787A1 PL 416787 A1 PL416787 A1 PL 416787A1 PL 416787 A PL416787 A PL 416787A PL 41678716 A PL41678716 A PL 41678716A PL 416787 A1 PL416787 A1 PL 416787A1
- Authority
- PL
- Poland
- Prior art keywords
- sulfuric acid
- purification
- waste
- acid
- waste sulfuric
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Przedmiotem zgłoszenia jest sposób oczyszczania odpadowego kwasu siarkowego. Sposób ten charakteryzuje się tym, że odpadowy kwas siarkowy, będący produktem odpadowym procesu estryfikacji alkoholi i/lub polialkoholi alifatycznych kwasem azotowym, prowadzonego w obecności kwasu siarkowego, kontaktuje się w procesie ciągłym z czynnikiem utleniającym, podawanym w strumieniu przegrzanej pary wodnej przeciwprądowo względem odpadowego kwasu siarkowego, a po zakończeniu oczyszczania odbiera się oczyszczony kwas siarkowy i odprowadza się gazy poreakcyjne. Korzystnie, oczyszczanie odpadowego kwasu siarkowego prowadzi się w kolumnie, ewentualnie wypełnionej szklanymi lub teflonowymi pierścieniami Raschiga, w zakresie temperatur od 130°C do 210°C, korzystnie od 150°C do 200°C. Po oczyszczeniu z kolumny odbiera się kwas siarkowy o stężeniu od 40% (m/m) do 90% (m/m), korzystnie od 60% (m/m) do 80% (m/m), o zawartości zanieczyszczeń organicznych, oznaczonej jako ChZT nie wyższej niż 300 mg O2/l, korzystnie nie wyższej niż 100 mg O2/l.The subject of the notification is a method for purifying waste sulfuric acid. This method is characterized in that waste sulfuric acid, which is a waste product of the esterification process of alcohols and / or aliphatic polyalcohols with nitric acid, carried out in the presence of sulfuric acid, is contacted in a continuous process with an oxidizing agent fed in a stream of superheated steam countercurrently with the waste acid sulfuric acid, and after the purification is completed, the purified sulfuric acid is collected and the reaction gases are removed. Preferably, the purification of the waste sulfuric acid is carried out in a column, optionally filled with glass or Teflon Raschig rings, in a temperature range from 130 ° C to 210 ° C, preferably from 150 ° C to 200 ° C. After purification, sulfuric acid at a concentration of 40% (m / m) to 90% (m / m), preferably 60% (m / m) to 80% (m / m), containing organic impurities, is collected from the column. designated as COD not higher than 300 mg O2 / l, preferably not higher than 100 mg O2 / l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL416787A PL234802B1 (en) | 2016-04-08 | 2016-04-08 | Method for purification of waste sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL416787A PL234802B1 (en) | 2016-04-08 | 2016-04-08 | Method for purification of waste sulfuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL416787A1 true PL416787A1 (en) | 2017-10-09 |
| PL234802B1 PL234802B1 (en) | 2020-04-30 |
Family
ID=59996974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL416787A PL234802B1 (en) | 2016-04-08 | 2016-04-08 | Method for purification of waste sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL234802B1 (en) |
-
2016
- 2016-04-08 PL PL416787A patent/PL234802B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL234802B1 (en) | 2020-04-30 |
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