SU537995A1 - Method for producing maleic anhydride - Google Patents
Method for producing maleic anhydrideInfo
- Publication number
- SU537995A1 SU537995A1 SU1987111A SU1987111A SU537995A1 SU 537995 A1 SU537995 A1 SU 537995A1 SU 1987111 A SU1987111 A SU 1987111A SU 1987111 A SU1987111 A SU 1987111A SU 537995 A1 SU537995 A1 SU 537995A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- maleic acid
- aqueous solution
- maleic anhydride
- anhydride
- evaporation
- Prior art date
Links
Description
тор, где при 80°С конденсируютс иары малеинового ангидрида. 3340 г/час конденсата направл ют на дистилл цию, а несконденсировавшиес пары воды и частично малеинового ангидрида конденсируют в следующем конденсаторе и полученный раствор малеиновой кислоты возвращают на стадию упаривани или на стадию абсорбции контактных газов процесса окислени бензола или углеводородовtorus, where at 80 ° C condensed malear anhydride. 3340 g / h of condensate is sent to the distillation, and uncondensed water vapor and partially maleic anhydride are condensed in the next condenser and the resulting solution of maleic acid is returned to the evaporation stage or the contact gas absorption process of benzene or hydrocarbons
С4-Сб.C4-Sat
Неиспарившуюс в аппарате дл дегидратировани часть малеинового ангидрида (280 г/час), содержащую в виде примесей малеиновую и фумаровую кислоты, а также смолы, непрерывно вывод т из нижней части аппарата. Малеиновый ангидрид экстрагируют водой и возвращают на стадию упаривани . Выход малинового ангидрида с учетом извлечени и переработки из кубового остатка 99,5%.The non-evaporated portion of maleic anhydride (280 g / h) in the dehydration apparatus, containing maleic and fumaric acid as well as resins in the form of impurities, is continuously removed from the bottom of the apparatus. Maleic anhydride is extracted with water and returned to the evaporation stage. The yield of raspberry anhydride, taking into account the extraction and processing of the bottom residue of 99.5%.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1987111A SU537995A1 (en) | 1974-01-16 | 1974-01-16 | Method for producing maleic anhydride |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1987111A SU537995A1 (en) | 1974-01-16 | 1974-01-16 | Method for producing maleic anhydride |
Publications (1)
Publication Number | Publication Date |
---|---|
SU537995A1 true SU537995A1 (en) | 1976-12-05 |
Family
ID=20572965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1987111A SU537995A1 (en) | 1974-01-16 | 1974-01-16 | Method for producing maleic anhydride |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU537995A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2458057C2 (en) * | 2006-05-24 | 2012-08-10 | Басф Се | Method of preventing precipitation of fumaric acid when producing maleic acid anhydride |
-
1974
- 1974-01-16 SU SU1987111A patent/SU537995A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2458057C2 (en) * | 2006-05-24 | 2012-08-10 | Басф Се | Method of preventing precipitation of fumaric acid when producing maleic acid anhydride |
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