SU1625861A1 - Purification method of trichloroethylene from acid admixture - Google Patents
Purification method of trichloroethylene from acid admixture Download PDFInfo
- Publication number
- SU1625861A1 SU1625861A1 SU884603717A SU4603717A SU1625861A1 SU 1625861 A1 SU1625861 A1 SU 1625861A1 SU 884603717 A SU884603717 A SU 884603717A SU 4603717 A SU4603717 A SU 4603717A SU 1625861 A1 SU1625861 A1 SU 1625861A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- purification
- tce
- trichlorethylene
- acidic impurities
- magnesia
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Изобретение касаетс производства трихлорэтилена, в частности его очистки от кислых примесей, может б. использовано в негатехимт. Цель - n iрешение качества л стабильности цслсього продукта. Очистку ведут обработкой трихлорэтилена щелочным агентом - мт- незнеи ф-лы JMgCO а, Мр,(ОН)о 3 Н20 при массовом соотнесении 1:(0,02- 0,025) с последующей дистилл цией и выделением целевого продукта.В JTOM случае последний сохран ет свою стабильность не менее 3 сут при л)(т- ви изменени рН водной выт л-ки, который сохран етс на уровне Я-9. 1 табл.The invention relates to the production of trichlorethylene, in particular its purification from acidic impurities, b. used in negatechimt. The goal is to solve the quality and stability of the entire product. Purification is carried out by treating trichlorethylene with an alkaline agent — mtzneznyi f-ly JMgCO a, Mp, (OH) o 3 H20 with a mass ratio of 1: (0.02– 0.025) followed by distillation and isolation of the target product. In the JTOM case, the latter is saved Its stability is not less than 3 days at 1) (the t-change in the pH of the aqueous extract, which is maintained at the level I-9. Table 1.
Description
Изобретение относитс к спосоиу очистки трихлорэтилена (ТХЭ), используемого , например, как растворитель при парожидкостной очистке электронно-оптических систем от кислых примесей .The invention relates to a process for the purification of trichlorethylene (TCE), used, for example, as a solvent in the vapor-liquid purification of electron-optical systems from acidic impurities.
Целью изобретени вл етс улучшение качества целевого продукта и повышение его стабильности при хранении.The aim of the invention is to improve the quality of the target product and increase its stability during storage.
Пример. В три одинаковые стекл нные колбы заливают по 100 г исходного ТХЭ с рН 2,5 его водной выт жки и по 1 г соответственно сорбента - нейтрализатора (поташ, сода, магнези гранул ции около 0,1-0,5 мм). В идентичных услови х перемешивани при 50-70°С соответственно через 0,5; 1; 1,5 и 2 ч отбирают пробы по 1 мл из каждой колбы дл определени рН водной выт жки ТХЭ.Example. Three identical glass flasks are poured on 100 g of initial TCE with pH 2.5 of its aqueous extract and 1 g of sorbent – neutralizer each (potash, soda, magnesia granulation about 0.1–0.5 mm). Under identical conditions of stirring at 50-70 ° C, respectively, after 0.5; one; 1.5 and 2 hours, 1 ml samples are taken from each flask to determine the pH of the aqueous extract of TCE.
Дл изменени соотношени реагентов в опытах ввод т по 2; 2,5 и 3 г сорбента; соответствующие значени рНIn order to change the ratio of reagents in experiments, 2 are introduced; 2.5 and 3 g of sorbent; corresponding pH values
при этом представлены в таблице, причем концентраци кислых примесей в исходном ТХЭ в пересчете на сол ную кислоту 0,7-8 г/л.however, they are presented in the table, with the concentration of acidic impurities in the starting TCE calculated as hydrochloric acid 0.7-8 g / l.
В результате пропускани ТХЭ через магнезию рН водной выт жки увеличиваетс с 2,5-3 до 8,4-10,4. После удалени кислых примесей провод т дистилл цию ТХЭ, при этом кислотность практически не мен етс .As a result of passing TCE through magnesia, the pH of the aqueous extract increases from 2.5-3 to 8.4-10.4. After removal of the acidic impurities, TCE is distilled, while the acidity remains almost unchanged.
Как видно из данных, приведенных в таблице, массовое соотношение ТХЭ к магнезии, равное 1:(0,иГ-и,025), вл етс оптимальным, так как при соотношении менее 1:0,02 не достигаете полна нейтрализаци , а при соотношении 1:0,025 достигаетс полна нейтрализаци , и следовательно, дальнейшее добавление магнезии не целесообразно.As can be seen from the data presented in the table, the mass ratio of TCE to magnesia, equal to 1: (0, IG-i, 025), is optimal, since with a ratio less than 1: 0.02 you do not achieve full neutralization, and with a ratio 1: 0.025 is achieved by complete neutralization, and therefore, the further addition of magnesia is not advisable.
Предлагаемый способ позвол ет существенно улучшить, качество очистки ТХЭ or кислых примесей в сравнении с известным, где используют пстага. Три (У)The proposed method allows to significantly improve the quality of purification of TCE or acidic impurities in comparison with the known, where pstag is used. Three (U)
с:with:
сьis smiling
ND СПND SP
00 О00 Oh
хлорэтилен, обработанный магнезией, в услови х его хранени , сохран ет свою стабильность не менее 3 сут, при этом рН 8-9 водной выт жки не измен етс .Chloroethylene, treated with magnesia, under conditions of its storage, retains its stability for at least 3 days, while the pH 8–9 of the aqueous extract does not change.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU884603717A SU1625861A1 (en) | 1988-11-09 | 1988-11-09 | Purification method of trichloroethylene from acid admixture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU884603717A SU1625861A1 (en) | 1988-11-09 | 1988-11-09 | Purification method of trichloroethylene from acid admixture |
Publications (1)
Publication Number | Publication Date |
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SU1625861A1 true SU1625861A1 (en) | 1991-02-07 |
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Family Applications (1)
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SU884603717A SU1625861A1 (en) | 1988-11-09 | 1988-11-09 | Purification method of trichloroethylene from acid admixture |
Country Status (1)
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SU (1) | SU1625861A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5306850A (en) * | 1992-04-03 | 1994-04-26 | Solvay (Societe Anonyme) | Purification process for a hydrofluoroalkane |
-
1988
- 1988-11-09 SU SU884603717A patent/SU1625861A1/en active
Non-Patent Citations (1)
Title |
---|
Инженерна спецификаии 34-8-12, 1985. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5306850A (en) * | 1992-04-03 | 1994-04-26 | Solvay (Societe Anonyme) | Purification process for a hydrofluoroalkane |
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