SU147179A1 - Isoprene cleaning method - Google Patents
Isoprene cleaning methodInfo
- Publication number
- SU147179A1 SU147179A1 SU730089A SU730089A SU147179A1 SU 147179 A1 SU147179 A1 SU 147179A1 SU 730089 A SU730089 A SU 730089A SU 730089 A SU730089 A SU 730089A SU 147179 A1 SU147179 A1 SU 147179A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- isoprene
- cleaning method
- maleic acid
- purification
- cyclopentadiene
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известны способы очистки изопрена от циклопснтадиена. Однако эти способы характеризуютс недостаточной степенью очистки и некоторые из них вл ютс пожаро- и взрывоопасными.Known methods of purification of isoprene from cyclopsytadiene. However, these methods are characterized by an insufficient degree of purification and some of them are fire and explosive.
Предлагае.мый способ отличаетс тем, что изопреи обрабатывают 15-25 /о-ным водным раствором малеиновой кислоты. Это позвол ет упростить процесс и увеличить степень очистки.The proposed method is characterized in that the isoprene is treated with a 15-25 / o-aqueous maleic acid solution. This simplifies the process and increases the degree of purification.
При осуществлении способа смесь изопрена с водным раствором малеиновой кислоты энергично перемешивают при 20-40°. При эти.ч услови х изопрен практически не вступает в реакцию с малеиновой кислотой , а циклопентадиен реагирует количественно. Продукт реакции малеиновой кислоты с циклоиентадиеиом отфильтровывают. Оставшуюс малеиновую кислоту обогащают свежими порци ми кислоты или по:1ностью замен ют.In the process, a mixture of isoprene with an aqueous solution of maleic acid is vigorously stirred at 20-40 °. Under these conditions, isoprene practically does not react with maleic acid, while cyclopentadiene reacts quantitatively. The product of the reaction of maleic acid with cyclobenzene is filtered off. The remaining maleic acid is enriched with fresh portions of the acid or by: 1 completely replaced.
В качестве сырь дл приготовлени раствора малеиновой кислоты используют .маленновый ангидрид.Maleneic anhydride is used as a raw material for the preparation of a solution of maleic acid.
Пример. Пзопрен с содержанием циклопентадиена 0,Р/о смешивают с 29%-ной малеиновой кислотой в соотноигении соответственно 1 : 5.Example. Psoprene with the content of cyclopentadiene 0, P / o is mixed with 29% maleic acid in proportion to 1: 5, respectively.
При 20° смесь перемешивают; при этом, чем энергичнее перемешивание , тем больше степень очистки. Содержание циклопентадиена в изопрене после очистки - 0,0003%, что способствует нормальной полимеризации .At 20 ° the mixture is stirred; at the same time, the more vigorous the mixing, the greater the degree of purification. The content of cyclopentadiene in isoprene after purification is 0.0003%, which contributes to normal polymerization.
П р е д е т и з о б р е т е и и PREDET and REFERENCE and and
Сиособ очистки изопрена от циклопентадиена, отличающийс тем, что, с целью увеличени степени очистки и упрощени процесса, изоирен обрабатывают 15-25%-ным водиым раствором малеиновой кислоты.The purification method of isoprene from cyclopentadiene, characterized in that, in order to increase the degree of purification and simplify the process, the isoirene is treated with a 15-25% aqueous solution of maleic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU730089A SU147179A1 (en) | 1961-05-13 | 1961-05-13 | Isoprene cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU730089A SU147179A1 (en) | 1961-05-13 | 1961-05-13 | Isoprene cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU147179A1 true SU147179A1 (en) | 1961-11-30 |
Family
ID=48302573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU730089A SU147179A1 (en) | 1961-05-13 | 1961-05-13 | Isoprene cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU147179A1 (en) |
-
1961
- 1961-05-13 SU SU730089A patent/SU147179A1/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES318745A1 (en) | Procedure for the preparation of 3-cyan-3-5-5-trimethylcyclohexanone of isoforone and cyanidic acid. (Machine-translation by Google Translate, not legally binding) | |
| GB1138143A (en) | The elimination of acrolein from acrylonitrile | |
| SU147179A1 (en) | Isoprene cleaning method | |
| ATE11287T1 (en) | PROCESS FOR PRODUCTION OF PHTHALIC ACID ANHYDRIDE. | |
| GB1092605A (en) | Process for the purification of í¸-oxazolines | |
| SU386907A1 (en) | METHOD FOR ISOLATION OF FORMIC ACID | |
| SU138589A1 (en) | Method for preparing flocculating reagent | |
| SU138240A1 (en) | The method of purification of ammonium chloride | |
| JPS54132535A (en) | Purification of m-dinitrobenzene | |
| US1132537A (en) | Process of treating clay and like materials. | |
| SU122872A1 (en) | Method for producing paraformaldehyde | |
| SU144982A1 (en) | The method of vulcanization of rubber compounds | |
| SU463656A1 (en) | The method of purification of hydrocarbons from impurities of cyclopentadiene | |
| SU385994A1 (en) | METHOD OF PROCESSING OF ACID RESINS | |
| RU2039077C1 (en) | Method of preparing meliorative soil agent | |
| SU479726A1 (en) | Method for preventing thickening of one stripped off magnesium-containing extractive phosphoric acid | |
| SU152373A1 (en) | The method of producing fluxes | |
| ES255246A1 (en) | Method of preparing methyl 5-nitro-2-furyl ketone | |
| SU60405A1 (en) | Method for producing superphosphate | |
| SU362813A1 (en) | METHOD FOR CLEANING NAFTHEN ACIDS | |
| FR1045628A (en) | Process for the activated chemical treatment of water for clarification, and products used | |
| SU1544768A1 (en) | Method of producing potassium salt of 1,4-napthoquinone-2-sulfonic acid | |
| ES218110A1 (en) | Improved bis(beta-hydroxyethyl) terephthalate | |
| SU472489A3 (en) | Herbicidal composition | |
| SU570550A1 (en) | Method of chemical separation of concentrates |