SU956432A1 - Process for recovering oxalic acid from liquids - Google Patents
Process for recovering oxalic acid from liquids Download PDFInfo
- Publication number
- SU956432A1 SU956432A1 SU803248888A SU3248888A SU956432A1 SU 956432 A1 SU956432 A1 SU 956432A1 SU 803248888 A SU803248888 A SU 803248888A SU 3248888 A SU3248888 A SU 3248888A SU 956432 A1 SU956432 A1 SU 956432A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- oxalic acid
- liquids
- extraction
- acid
- nitric
- Prior art date
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- Extraction Or Liquid Replacement (AREA)
Description
6,1 г/л. Содержание азотной кислоты в водной фазе 0,34 моль/л. Извлечение щавелевой кислоты в органическую фазу 82,4%, коэфф,ицнент распределени по щавелевой кислоте а 4,67.6.1 g / l. The nitric acid content in the aqueous phase is 0.34 mol / l. The extraction of oxalic acid in the organic phase is 82.4%, the coeff, the percentage distribution for oxalic acid is 4.67.
Пример 3. Раствор, содержащий щавелевую кислоту в кол1ичестве 35,3 г/л, подвергают одностадийной экстракции трибутилфосфатом лри соотнощенки О : R 1:1, в присутствии азотной кислоты в количестве 1,5 моль/л. Врем контактировани 10 мин, последующего расслаивани 5 мин.Example 3. A solution containing oxalic acid in the amount of 35.3 g / l is subjected to a single-stage extraction with tributyl phosphate from the ratio O: R 1: 1, in the presence of nitric acid in an amount of 1.5 mol / l. The contact time is 10 minutes, the subsequent separation of 5 minutes.
Содержание щавелевой кислоты в органической фазе - 26,75 г/л, в водной фазе 8,55 г/л. Содержание азотнюй кислоты в водной фазе 0,26 моль/л. Извлечение щавелевой кислоты в органическую фазу 75,7%, коэффициент распределени по щавелеаой кислоте а 3,13.The content of oxalic acid in the organic phase is 26.75 g / l, in the aqueous phase 8.55 g / l. The nitric acid content in the aqueous phase is 0.26 mol / l. The extraction of oxalic acid in the organic phase is 75.7%, the distribution coefficient for oxalic acid is 3.13.
Полученные результаты представлены в табллце.The results are presented in the table.
Технико-экономический эффект от применени предложенного способа обусловлен увеличением степени извлечени щавелевой кислоты из сточных вод до 80% при стадийной экстракции. При этом при п тиступенчатой противоточной экстракции содержание щавелевой кислоты в водах уменьщаетс до 0,1 г/л и тем самым степень извлечени щавелевой кислоты увеличиваетс до 98-99%.The technical and economic effect from the application of the proposed method is due to an increase in the degree of extraction of oxalic acid from wastewater up to 80% during the stepwise extraction. At the same time, with a five-step countercurrent extraction, the content of oxalic acid in waters decreases to 0.1 g / l, and thus the degree of extraction of oxalic acid increases to 98–99%.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU803248888A SU956432A1 (en) | 1980-12-12 | 1980-12-12 | Process for recovering oxalic acid from liquids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU803248888A SU956432A1 (en) | 1980-12-12 | 1980-12-12 | Process for recovering oxalic acid from liquids |
Publications (1)
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SU956432A1 true SU956432A1 (en) | 1982-09-07 |
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Family Applications (1)
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SU803248888A SU956432A1 (en) | 1980-12-12 | 1980-12-12 | Process for recovering oxalic acid from liquids |
Country Status (1)
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SU (1) | SU956432A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106115835A (en) * | 2016-07-22 | 2016-11-16 | 中国科学院长春应用化学研究所 | A kind of processing method of the industrial wastewater containing oxalic acid |
RU2603151C1 (en) * | 2015-07-28 | 2016-11-20 | федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method of purifying water from oxalic acid |
-
1980
- 1980-12-12 SU SU803248888A patent/SU956432A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2603151C1 (en) * | 2015-07-28 | 2016-11-20 | федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" | Method of purifying water from oxalic acid |
CN106115835A (en) * | 2016-07-22 | 2016-11-16 | 中国科学院长春应用化学研究所 | A kind of processing method of the industrial wastewater containing oxalic acid |
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