SU537995A1 - Method for producing maleic anhydride - Google Patents

Method for producing maleic anhydride

Info

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
Application number
SU1987111A
Other languages
Russian (ru)
Inventor
Лазарь Исаевич Бляхман
Григорий Ефимович Розенбаум
Виктор Алексеевич Панфилов
Александр Маркович Якубсон
Борис Мордкович Фельдман
Елена Константиновна Крылова
Яков Исаакович Шраер
Юрий Николаевич Шанин
Андрей Семенович Колесников
Владимир Степанович Крупин
Галина Михайловна Малкова
Original Assignee
Предприятие П/Я А-7850
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я А-7850 filed Critical Предприятие П/Я А-7850
Priority to SU1987111A priority Critical patent/SU537995A1/en
Application granted granted Critical
Publication of SU537995A1 publication Critical patent/SU537995A1/en

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)

1. Способ получени  малеинового ангидрида из малеиновой кислоты путем упаривани  ее водного раствора и термической дегидратации полученной концентрированной кислоты с последующим выделением целевого продукта путем парциальной конденсации, отличающийс  тем, что, с целью упрощени  технологии , повышени  выхода и качества малеипового ангидрида, упаривание ведут с одновременной дегидратацией 3-30% исходного количества малеиновой кислоты и образующиес  при этом пары абсорбируют исходным водным раствором малеиновой кислоты.1. A method of producing maleic anhydride from maleic acid by evaporation of its aqueous solution and thermal dehydration of the concentrated acid obtained, followed by separation of the target product by partial condensation, characterized in that, in order to simplify the technology, improve the yield and quality of maleipic anhydride, evaporation is carried out dehydration of 3-30% of the initial amount of maleic acid and the resulting vapors are absorbed by the original aqueous solution of maleic acid. 2. Способ по п. 1, отличающийс  тем, что используют исходный водный раствор малеиновой кислоты, поступающий на абсорбцию , с температурой 60-100°С.2. A method according to claim 1, characterized in that an initial aqueous solution of maleic acid is used, which is fed to the absorption, with a temperature of 60-100 ° C.
SU1987111A 1974-01-16 1974-01-16 Method for producing maleic anhydride SU537995A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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