SU530881A1 - Method for producing 5-methyl-2-furancarboxylic acid - Google Patents

Method for producing 5-methyl-2-furancarboxylic acid

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Publication number
SU530881A1
SU530881A1 SU2169545A SU2169545A SU530881A1 SU 530881 A1 SU530881 A1 SU 530881A1 SU 2169545 A SU2169545 A SU 2169545A SU 2169545 A SU2169545 A SU 2169545A SU 530881 A1 SU530881 A1 SU 530881A1
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SU
USSR - Soviet Union
Prior art keywords
carried out
mol
methyl
producing
furancarboxylic acid
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Application number
SU2169545A
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Russian (ru)
Inventor
Дзидра Рудольфовна Крейле
Валентина Александровна Славинская
Лия Яновна Круминя
Дзидра Яновна Эглите
Дзинтра Эйженовна Силе
Original Assignee
Ордена Трудового Красного Знамени Институт Органического Синтеза Ан Латвийской Сср
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Priority to SU2169545A priority Critical patent/SU530881A1/en
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Publication of SU530881A1 publication Critical patent/SU530881A1/en

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Description

(54) СПОСОБ ПОЛУЧЕНИЯ 5МЕТИЛ-2-ФУРАНКАРБОНОВОЙ КИСЛОТЫ(54) METHOD FOR OBTAINING 5METHyl-2-FURANCARBONIC ACID

33

л ют и экстрагируют эфиром. Степень извлечени  98%.poured and extracted with ether. The recovery rate is 98%.

В оптимальных услови х выход 5-метил4 -2-фура1жар6оновой кислоты 48%, выход 2,,5-фурандикарбоновой кислоты не превышает 3%.Under optimal conditions, the yield of 5-methyl4 -2-fura1far6onic acid is 48%, the yield of 2, 5-furandicarboxylic acid does not exceed 3%.

Пример 1. 5,5 Г (0,05 моль) 5 метш1фурфур)ала, 2 г {0,О5 моль) гидроокиси натри , 11,5 г (О,О5моль) окиси| серебра и 10О мл воды выдерживают 6 чар в реакторе при температуре 134-157 С, давлении ЗО кг/см и расходе воздуха 9 л/мин на 1 л реакционной смеси. Ката-f лизатор отфильтровывают, промывают 10мл воды и подкисл ют фильтрат 2 мл сол ной1 кислоты, Оксидат содержит 2,98 г (48%) 5-метил-2-фуранкарбоновой кислоты, 0,25 г (3,3%) 2,5-фурандикарбоновой киолоты и 0,11 г (2,1%) непрореагировавшего 5-метилфурфурола.Example 1. 5.5 g (0.05 mol) 5 metsh1furfur) ala, 2 g {0, O5 mol) sodium hydroxide, 11.5 g (O, O5 mol) oxide | silver and 10 O ml of water is kept 6 spells in the reactor at a temperature of 134-157 C, pressure of 30 kg / cm and air flow rate of 9 l / min per 1 l of the reaction mixture. The kata-f lyser is filtered off, washed with 10 ml of water and the filtrate is acidified with 2 ml of hydrochloric acid, the oxidate contains 2.98 g (48%) of 5-methyl-2-furancarboxylic acid, 0.25 g (3.3%) 2, 5-furandicarbonic acid and 0.11 g (2.1%) of unreacted 5-methylfurfural.

Оксидат экстрагируют 3 х 50 мл эфир. Степень извлечени  5--метил-2--фуранкарбо новой кислоты 98%,The oxidate is extracted with 3 x 50 ml of ether. The recovery rate of 5 - methyl-2 - furancarboxylic acid is 98%,

Пример 2. 5,5 г В-метилфурфурола и 11,5 г окиси серебра в 90 хлорбензола выдерживают 5 час при температуре 150-165 Cj давлении ЗО кг/см и расходе ваадуха 1О л/мин на 1 л реакционной смеси. Оксидат содержит 1,31 г (28мол.% 5-метил-2-фуранкарбоноаой кислоты иExample 2. 5.5 g of B-methylfurfural and 11.5 g of silver oxide in 90 chlorobenzene are kept for 5 hours at a temperature of 150-165 Cj at a pressure of 30 kg / cm and a consumption of vacuum of 1O l / min per 1 l of the reaction mixture. The oxidate contains 1.31 g (28 mol.% 5-methyl-2-furancarboxylic acid and

|1,35 г (2, 5%) непрореагировавшего 5-метилфурфурола .| 1.35 g (2, 5%) of unreacted 5-methylfurfural.

Claims (4)

1.Способ получени  5-метил-2.-фуранкарбоновой кислоты окислением метилфурф рола , отличающийс  тем, что, i1. A method for producing 5-methyl-2.-furancarboxylic acid by oxidizing methylfurf rol, characterized in that, i с целью упрощени  технологии процесса, окис. пение провод т кислородом вовдуха под давлением а присутствии в качестве катапизато ра окиси серебра в водном растворе щелочи , например гидроокиси натри , или в ере де хлорбензола при 134-165 С.in order to simplify the process technology, oxide. singing is carried out with oxygen in air under pressure and in the presence of silver oxide in an aqueous solution of alkali, e.g. sodium hydroxide, as a catapisator, or in the de chlorobenzene at 134-165 ° C. 2.Способ по п. 1, о т л и ч а ю щ и Й4с   тем, что процесс провод т при концен-i трации 5-мвтилфурфурола 0,27 - 0,5 моль/л.2. The method according to claim 1, of which is carried out in that the process is carried out at a concentration of 0.27-0.5 mol / l at a concentration of 5-millfurfurol. 3.Способ по п. 1, о т л и ч а ю щ и й|с   тем, что используют катализатор в количестве 10-10О мол.% на 5-метилфур4урол,3. The method according to claim 1, of which is used in an amount of 10-10 O mol.% For 5-methylfur4yur, 4.Способ ко п. 1, о т л и ч а ю щ и fflс   тем, что процесс провод т при концентрации щелочи 0,28-О,5 моль/л.4. A method for claim 1, tl and h ay y and ffl with the fact that the process is carried out at an alkali concentration of 0.28-O, 5 mol / l. Источники информации, прин тые во внит мание при экспертизе:Sources of information taken into consideration in the examination: 1.:Э. Лгп.СЬет. 50С., 75,2370,1953. 2. :3. гас. Agr. Куи&Ни 9,149, 1949.1.:E Lbp 50C., 75.2370.1953. 2.: 3. gus Agr. Kui & Ny 9,149, 1949.
SU2169545A 1975-07-09 1975-07-09 Method for producing 5-methyl-2-furancarboxylic acid SU530881A1 (en)

Priority Applications (1)

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SU2169545A SU530881A1 (en) 1975-07-09 1975-07-09 Method for producing 5-methyl-2-furancarboxylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2169545A SU530881A1 (en) 1975-07-09 1975-07-09 Method for producing 5-methyl-2-furancarboxylic acid

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SU530881A1 true SU530881A1 (en) 1976-10-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU197761U1 (en) * 2019-09-02 2020-05-26 Нина Владимировна Смирнова LABORATORY STAND FOR THE PROCESSES OF OXIDATION OF FURANIC DERIVATIVES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU197761U1 (en) * 2019-09-02 2020-05-26 Нина Владимировна Смирнова LABORATORY STAND FOR THE PROCESSES OF OXIDATION OF FURANIC DERIVATIVES

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