SU339131A1 - METHOD FOR SEPARATION OF WATER MIXTURES OF NITROGEN AND ACETIC ACID - Google Patents
METHOD FOR SEPARATION OF WATER MIXTURES OF NITROGEN AND ACETIC ACIDInfo
- Publication number
- SU339131A1 SU339131A1 SU1270105A SU1270105A SU339131A1 SU 339131 A1 SU339131 A1 SU 339131A1 SU 1270105 A SU1270105 A SU 1270105A SU 1270105 A SU1270105 A SU 1270105A SU 339131 A1 SU339131 A1 SU 339131A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- acetic acid
- nitrogen
- separation
- nitric
- water mixtures
- Prior art date
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Изобретение относитс к разделению смесей жидкостей, в частности водной смеси азотной и уксусной КИСЛОТ.This invention relates to the separation of mixtures of liquids, in particular aqueous mixtures of nitric and acetic acid.
По известному способу разделение водных смесей азотной и уксусной кислот осуществл ют в две стадии. Сначала смесь подвергают ректификации с целью отгонки избыточного количества уксусной кислоты и воды, а затем через кубовые остатки, представл ющие собой безводный азеотроп азотной и уксусной кислот (34 вес. % НЫОз, т. ,кип. 128,6° С) пропускают окись азота при температуре выше 2ГС, восстанавлива большую часть (75%) азотной кислоты по двуокиси азота. При это.м используют окись азота, выделившуюс в процессе синтеза а-о,ксиизомасл ной кислоты.According to a known method, the separation of aqueous mixtures of nitric and acetic acids is carried out in two stages. First, the mixture is subjected to distillation in order to distill off excess acetic acid and water, and then through bottom residues, which are anhydrous nitrogen and acetic acid azeotrope (34 wt.% HYO3, t., Bale 128.6 ° C), nitric oxide is passed through at temperatures above 2GS, restoring most (75%) of nitric acid on nitrogen dioxide. This m. Uses nitric oxide released during the synthesis of ao, xyisobutyric acid.
С целью упрощени процесса предлагаетс способ, по Которому окись азота пропускают непосредственно через водную смесь азотной и уксусной кислот. Процесс ведут до конечной концентрации воды в реакционной Массе не более 15 вес. %. При этом условии азотна кислота полностью (на 100%) восстанавливаетс до двуокиси азота. Выделившуюс двуокись азота конденсируют, возвраща четырехокись в цикл. Оставшуюс смесь уксусной кислоты и воды раздел ют реактифйкацией.In order to simplify the process, a method is proposed whereby nitric oxide is passed directly through an aqueous mixture of nitric and acetic acids. The process is carried out to a final concentration of water in the reaction mass of not more than 15 weight. % Under this condition, nitric acid is completely (100%) reduced to nitrogen dioxide. Nitrogen dioxide released is condensed, recycling the tetroxide. The remaining mixture of acetic acid and water is separated by re-drying.
ют описанньш методом. Необходимое количество уксусной кислоты возвращают в цикл.They are described by the method. The required amount of acetic acid is recycled.
1. Через 50 мл смеси состава , %: 30,2 HNOa, 67,4 СНзСООН, 2,4 нролуокают 13 л окиси азота при 80° С со скоростью 6 л/час. Состав реакционной массы после восстановлени , %: СНзСООН - 90: Н2О- - 10; HNOs - нет. 1. After 50 ml of a mixture of the composition,%: 30.2 HNOa, 67.4 CH 2 COOH, 2.4, dilute 13 l of nitric oxide at 80 ° C at a rate of 6 l / h. The composition of the reaction mass after reduction,%: CH3COOH - 90: H2O- - 10; HNOs - no.
П р и мер 2. К 25 г дистиллата состава, %: 39,5 НЫОз, 15 СНзСООН, 45,5 HjO, полученного при разгонке гидролизата первой стадии процесса получени метакриловой кислоты , добавл ют 75 г СИзСООН. После этого пропускают 10 л окиси азота при 100° С со скоростью 6 л/час. Состав реакционной массы после восстановлени , %: СНзСООН - 85, НгО - 15, HNO3 - нет.Example 2: To 25 g of distillate composition,%: 39.5 HN03, 15 CH 2 COOH, 45.5 HjO, obtained by distillation of the first stage hydrolyzate of the methacrylic acid production process, add 75 g of HClC. After that, pass 10 l of nitric oxide at 100 ° C at a rate of 6 l / h. The composition of the reaction mass after reduction,%: CH3COOH - 85, NgO - 15, HNO3 - no.
ПреД|Мет изобретени PreV | Met invention
1.Способ разделени водных смесей азотной и уксусной кислот путем восстановлени азотной кислоты окисью азота при температуре выше 21°С, отличающийс тем, что, с целью упрощени процесса, окнсь азота пропускают непосредственно через водную смесь азотной и уксусной кислот.1. A method of separating aqueous mixtures of nitric and acetic acids by reducing nitric acid with nitric oxide at a temperature above 21 ° C, characterized in that, in order to simplify the process, a window of nitrogen is passed directly through the aqueous mixture of nitric and acetic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1270105A SU339131A1 (en) | 1968-09-12 | 1968-09-12 | METHOD FOR SEPARATION OF WATER MIXTURES OF NITROGEN AND ACETIC ACID |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1270105A SU339131A1 (en) | 1968-09-12 | 1968-09-12 | METHOD FOR SEPARATION OF WATER MIXTURES OF NITROGEN AND ACETIC ACID |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU339131A1 true SU339131A1 (en) | 1973-09-27 |
Family
ID=20443378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1270105A SU339131A1 (en) | 1968-09-12 | 1968-09-12 | METHOD FOR SEPARATION OF WATER MIXTURES OF NITROGEN AND ACETIC ACID |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU339131A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA033307B1 (en) * | 2016-10-07 | 2019-09-30 | Дмитрий Александрович Рудаков | Method to synthesize nitrogen oxide (iv) for generator of rocket propellent oxidizer |
-
1968
- 1968-09-12 SU SU1270105A patent/SU339131A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA033307B1 (en) * | 2016-10-07 | 2019-09-30 | Дмитрий Александрович Рудаков | Method to synthesize nitrogen oxide (iv) for generator of rocket propellent oxidizer |
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