SU566815A1 - Method of drying solvents - Google Patents
Method of drying solventsInfo
- Publication number
- SU566815A1 SU566815A1 SU7602319698A SU2319698A SU566815A1 SU 566815 A1 SU566815 A1 SU 566815A1 SU 7602319698 A SU7602319698 A SU 7602319698A SU 2319698 A SU2319698 A SU 2319698A SU 566815 A1 SU566815 A1 SU 566815A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- drying
- solvents
- drying solvents
- water
- cleaning
- Prior art date
Links
Landscapes
- Detergent Compositions (AREA)
- Extraction Or Liquid Replacement (AREA)
Description
1one
Изобретение относитс к способу осушки растворителей, в частности к тем из них, которые состо т из спиртов и хлор-, хлорфторуглеводородов .The invention relates to a method for drying solvents, in particular, those consisting of alcohols and chloro, chlorofluorocarbons.
Примером такого растворител вл етс моюща жидкость дл очистки электрооборудовани от масл ных и других загр знений, состо ща из метилхлороформа (16- 20 об. %), 1,1,2-трихлор-1,2,2-трифторэтана (35-39 об. %) и этилового спирта (41- 45 об. %). Дл очистки поверхности изделий из некоторых видов полимеров примен ют аналогичные смеси хлорфторэтанов, хлорэтанов или хлорэтиленов с метиловым, этиловым к другими спиртами 1.An example of such a solvent is a washing fluid for cleaning electrical equipment from oil and other contaminants, consisting of methyl chloroform (16-20% by volume), 1,1,2-trichloro-1,2,2-trifluoroethane (35-39 vol.%) and ethyl alcohol (41-45 vol.%). For cleaning the surface of products from certain types of polymers, similar mixtures of chlorofluoroethanes, chloroethanes or chloroethylenes with methyl, ethyl to other alcohols 1 are used.
При использовании таких растворителей в них накапливаетс вода в значительных количествах . Так, например, в использованной моющей жидкости содержание растворенной воды достигает 8-10%, что делает невозможным ее применение дл целей очистки электрооборудовани . Вода накапливаетс в растворителе за счет удалени с влажной поверхности очищаемых изделий за счет поглощени паров воды из влажного воздуха в процессе очистки изделий и другими пут ми.When such solvents are used, significant amounts of water accumulate in them. So, for example, in the used washing liquid the content of dissolved water reaches 8-10%, which makes it impossible to use it for the purpose of cleaning electrical equipment. Water accumulates in the solvent due to the removal of the cleaned products from the wet surface due to the absorption of water vapor from the humid air during the cleaning process of the products and in other ways.
При очистке такого рода растворителей основной проблемой вл етс удаление избыточных количеств растворенной воды.When cleaning these types of solvents, the main problem is to remove excess amounts of dissolved water.
Проблема создаетс своеобразным составом использованного растворител , содержащего до 8-10% воды в сочетании с дес тками процентов как спирта, так и галоидуглеводородов (при сохранении гомогенности).The problem is created by the peculiar composition of the solvent used, containing up to 8-10% of water in combination with tens of percent of both alcohol and halohydrocarbons (while maintaining homogeneity).
Известны способы осущки растворителей безводными сол ми, окис ми или гидроокис ми металлов 2, сорбентами 3.Methods are known for drying solvents with anhydrous salts, oxides or hydroxides of metals 2, sorbents 3.
Однако, при осушке растворителей указанного выше типа, например моющей жидкости, перечисленные способы либо непригодны, либо недостаточно эффективны с технической точки зрени .However, when drying solvents of the type indicated above, such as a washing liquid, the methods listed are either unsuitable or not efficient enough from a technical point of view.
Метод осущки безводными сол ми металлов или неэффективен по указанным причинам , или непригоден из-за химического св зывани спирта в св зи с образованием сольватов (CaCla, MgSO4 и др.). Сушка окис ми и гидроокис ми металлов (СаО, NaOH и др.), непригодна из-за вызываемого ими химического разложени вход щих в состав моющей, жидкости галоидуглеводородов.The method of drying out anhydrous metal salts is either ineffective for the reasons mentioned or unsuitable because of the chemical bonding of the alcohol due to the formation of solvates (CaCla, MgSO4, etc.). Drying with oxides and hydroxides of metals (CaO, NaOH, etc.) is unsuitable because of the chemical decomposition caused by them of the halohydrocarbons entering the detergent composition.
Адсорбционный способ сушки цеолитами, активной окисью алюмини или силикагелем позвол ет иолучить растворитель с остаточным содержанием воды менее 3,5%. Однако промышленное применение адсорбционной сушки растворителей данного типа затруднено высоким содержанием в них раствореннойAn adsorption drying method with zeolites, active alumina or silica gel allows the solvent to be obtained with a residual water content of less than 3.5%. However, the industrial use of adsorption drying of solvents of this type is complicated by the high content of dissolved
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602319698A SU566815A1 (en) | 1976-02-02 | 1976-02-02 | Method of drying solvents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602319698A SU566815A1 (en) | 1976-02-02 | 1976-02-02 | Method of drying solvents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU566815A1 true SU566815A1 (en) | 1977-07-30 |
Family
ID=20647349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7602319698A SU566815A1 (en) | 1976-02-02 | 1976-02-02 | Method of drying solvents |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU566815A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322309A (en) | 1979-04-27 | 1982-03-30 | A. B. Chance Company | Composition capable of removing hydrophilic and hydrophobic contaminants from surfaces |
-
1976
- 1976-02-02 SU SU7602319698A patent/SU566815A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322309A (en) | 1979-04-27 | 1982-03-30 | A. B. Chance Company | Composition capable of removing hydrophilic and hydrophobic contaminants from surfaces |
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