SU956432A1 - Process for recovering oxalic acid from liquids - Google Patents

Process for recovering oxalic acid from liquids Download PDF

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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
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SU
USSR - Soviet Union
Prior art keywords
oxalic acid
liquids
extraction
acid
nitric
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SU803248888A
Other languages
Russian (ru)
Inventor
Николай Степанович Мясоедов
Камель Акбатаевич Ибраев
Римма Хамитовна Галиева
Раиса Григорьевна Путинцева
Виктор Васильевич Евтеев
Борис Федорович Звонцов
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Предприятие П/Я А-7587
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Priority to SU803248888A priority Critical patent/SU956432A1/en
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Publication of SU956432A1 publication Critical patent/SU956432A1/en

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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)

1. Способ извлечени  щавелевой кислоты  з жидкостей, включающий экстракцию1. Method of extracting oxalic acid from liquids, including extraction КИСЛОТЫ трибутилфосфатом, отличающийс  тем, что, с целью повышени  степени извлечени  кислоты, экстракцию ведут в присутствии азотной или сол ной кислоты.ACIDS with tributyl phosphate, characterized in that, in order to increase the degree of acid recovery, extraction is carried out in the presence of nitric or hydrochloric acid. 2. Способ лоп. 1, отличающийс  тем, что используют азотную или сол ную кислоту с концентрацией 0,1-1,5 моль/г.2. Lop method. 1, characterized in that nitric or hydrochloric acid is used with a concentration of 0.1-1.5 mol / g. прин тый воtaken in Источник информации, внимание при экспертизе:Source of information, attention during examination: 1. Сборник научных трудов ВНИИ25 ЦВЕТМЕТА, № 12. М., изд. Металлурги , 1968, с. 58-60 (прототип).1. Collection of scientific papers VNII25 Tsvetmet, № 12. M., ed. Metallurgists, 1968, p. 58-60 (prototype).
SU803248888A 1980-12-12 1980-12-12 Process for recovering oxalic acid from liquids SU956432A1 (en)

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SU803248888A SU956432A1 (en) 1980-12-12 1980-12-12 Process for recovering oxalic acid from liquids

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SU803248888A SU956432A1 (en) 1980-12-12 1980-12-12 Process for recovering oxalic acid from liquids

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SU956432A1 true SU956432A1 (en) 1982-09-07

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Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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