SU137910A1 - Method for producing malonic acid - Google Patents
Method for producing malonic acidInfo
- Publication number
- SU137910A1 SU137910A1 SU659800A SU659800A SU137910A1 SU 137910 A1 SU137910 A1 SU 137910A1 SU 659800 A SU659800 A SU 659800A SU 659800 A SU659800 A SU 659800A SU 137910 A1 SU137910 A1 SU 137910A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- malonic acid
- hydrogen peroxide
- producing malonic
- producing
- oxidation
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Известен способ получени малоновой кислоты, основанный на реакции окислени блочной кислоты перекисью водорода в среде аммиака при 20°. Способ отличаетс низкой производительностью (реакци окислени длитс 30 час) и большими потер ми малоновой кислоты в процессе ее выделени .A method of producing malonic acid is known, based on the oxidation of malic acid by hydrogen peroxide in ammonia at 20 °. The method is characterized by low productivity (oxidation reaction lasts 30 hours) and large losses of malonic acid in the process of its isolation.
Предлагаемый способ получени малоновой кислоты основан на окислении блочной кислоты перекисью водорода в водной среде при температуре 70-75°. Длительность процесса окислени составл ет 2-2,5 час; выделение малоновой кислоты осуществл ют кристаллизацией из частично упаренных водных растворов. Выход 50-60% от теоретического .The proposed method for producing malonic acid is based on the oxidation of malic acid with hydrogen peroxide in an aqueous medium at a temperature of 70-75 °. The duration of the oxidation process is 2-2.5 hours; the isolation of malonic acid is carried out by crystallization from partially evaporated aqueous solutions. Output 50-60% of theoretical.
Пример. К 134 г 50Ур-ного водного раствора блочной кислоты при температуре 60° и интенсивном перемешивании приливают постепенно 105 мл 30%-ного водного раствора перекиси водорода. Скорость подачи перекиси водорода регулируют таким образом, чтобы температура реакционной смеси не поднималась выше 75°. По окончании прилива перекиси водорода реакционную смесь выдерживают в течение часа , после чего упаривают под.вакуумом при температуре не выше 70 до по влени кристаллов. Упаренный раствор охлаждают, отфильтровывают выпавшие кристаллы малоновой кислоты и сушат их при температуре 60-65°.Example. 105 ml of a 30% aqueous solution of hydrogen peroxide are poured into 134 g of a 50% pure aqueous malic acid solution at a temperature of 60 ° and vigorous stirring. The feed rate of hydrogen peroxide is controlled so that the temperature of the reaction mixture does not rise above 75 °. After the end of the tide of hydrogen peroxide, the reaction mixture is kept for one hour, then evaporated under vacuum at a temperature not higher than 70 until the appearance of crystals. One stripped off solution is cooled, the precipitated crystals of malonic acid are filtered off and dried at a temperature of 60-65 °.
Выход малоновой кислоты 60% от теоретического.The yield of malonic acid 60% of theoretical.
Предмет изобретени Subject invention
Способ получени малоновой кислоты путем окислени блочной кислоты перекисью водорода, отличающийс тем, что, с целью увеличени производительности процесса и удешевлени себестоимосгн целевого продукта, окисление провод т в водном растворе перекиси водорода и при температуре, не превышающей 75°.The method of producing malonic acid by oxidation of malic acid with hydrogen peroxide, characterized in that, in order to increase the productivity of the process and reduce the cost of the target product, the oxidation is carried out in an aqueous solution of hydrogen peroxide and at a temperature not exceeding 75 °.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU659800A SU137910A1 (en) | 1960-03-19 | 1960-03-19 | Method for producing malonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU659800A SU137910A1 (en) | 1960-03-19 | 1960-03-19 | Method for producing malonic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
SU137910A1 true SU137910A1 (en) | 1960-11-30 |
Family
ID=48294092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU659800A SU137910A1 (en) | 1960-03-19 | 1960-03-19 | Method for producing malonic acid |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU137910A1 (en) |
-
1960
- 1960-03-19 SU SU659800A patent/SU137910A1/en active
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