SU137910A1 - Method for producing malonic acid - Google Patents

Method for producing malonic acid

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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
Application number
SU659800A
Other languages
Russian (ru)
Inventor
И.Л. Грудьев
Original Assignee
И.Л. Грудьев
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 И.Л. Грудьев filed Critical И.Л. Грудьев
Priority to SU659800A priority Critical patent/SU137910A1/en
Application granted granted Critical
Publication of SU137910A1 publication Critical patent/SU137910A1/en

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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 °.

SU659800A 1960-03-19 1960-03-19 Method for producing malonic acid SU137910A1 (en)

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

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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)

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