SU368226A1 - Method of producing chloroanhydride dichloroacetic - Google Patents

Method of producing chloroanhydride dichloroacetic

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Publication number
SU368226A1
SU368226A1 SU1645672A SU1645672A SU368226A1 SU 368226 A1 SU368226 A1 SU 368226A1 SU 1645672 A SU1645672 A SU 1645672A SU 1645672 A SU1645672 A SU 1645672A SU 368226 A1 SU368226 A1 SU 368226A1
Authority
SU
USSR - Soviet Union
Prior art keywords
dichloroacetic
chloroanhydride
producing
trichlorethylene
acid chloride
Prior art date
Application number
SU1645672A
Other languages
Russian (ru)
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
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Priority to SU1645672A priority Critical patent/SU368226A1/en
Application granted granted Critical
Publication of SU368226A1 publication Critical patent/SU368226A1/en

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Description

1one

Изобретение относитс  к способу получени  галюидангидридов карбоновых кислот - иолупродуктов дл  различных оргаиическнх синтезов .The present invention relates to a method for producing carboxylic acid halides - semi-products for various organic syntheses.

Известен способ получени  хлорангидрида дихлоруксусной кислоты вместе с окисью трихлорэтилеиа радиационно-химическим окислением трихлорэтилена кислородом. Выход 32%. Однако окиси трихлорэтиленлA known method for the preparation of dichloroacetic acid chloride together with trichloroethylen oxide is a radiation-chemical oxidation of trichlorethylene with oxygen. Yield 32%. However, trichloroethylene oxide

как правнло, больше, as more

при этом Образуетс , чем хлорангидрида.when this is formed than the acid chloride.

Состав продуктов окислени , вес. %The composition of oxidation products, wt. %

С целью повышени  селективности процесса предложено окисление нроподить в присутствии амина, ирсимун1,сстпснно триэтиламина, вз того в количестве не Meiiee 0,008 г1кг исходного .сырь .In order to increase the selectivity of the process, it was proposed to oxidize nopodit in the presence of amine, irsimun1, with triethylamine, in an amount of not Meiiee of 0.008 g / kg of the starting material.

Добавленный триэтнламин,  вл  сь очень слабым ингибитором, изомеризует окись трихлорэтнлена в процессе окислени  только до хлорангидрида дихлоруксусной кнслоты.The added triethnlamine, being a very weak inhibitor, isomerizes the trichloroethnylene oxide during the oxidation process only to dichloroacetic acid chloride.

Вли ние добавок триэтнламнна на окисление трихлорэтнлена показано в таблице.The effect of triethnamnn additives on the trichloroethnylene oxidation is shown in the table.

-Из данных таблицы видно, что введение различных количеств амина, достигающих 300 г/т, практически не вли ет на скорость окислени . Пример. Реакционный сосуд на 146 г трихлорэтилена устанавливают в камере источника Y-излучени  радиактивного кобальта, нагревают до 65°С и пропускают кислород со скоростью 0,4 л/мин в течение 5 час. Мощность дозы, поглощаемой трихлорэтиленом в месте установлени  сосуда, равна 40 рад.сек. В исходный т.рихлорэтилен ввод т 120 г/т триэтил мина . После прекращени  облучени  прореагировавша  жидкость содержит 61,4% хлорангидрида дихлоруксусной кислоты и 38,6% трихлорэтилена, которые раздел ют ректификацией. Выход целевого продукта па прореагировавший трихлорэтилен - 97%. Предмет изобретени  Способ получени  хлорангидрида дихлоруксусиой кИСлоты путем окислени  трихлорэтилена кислородсодержащими газами под воздействием ионизирующей радиации с последующим выделением целевого продукта, отличающийс  тем, что, С целью повыщени  селективности процесса, последний провод т в присутствии амина, например триэтиламина, вз того в количестве не менее 0,008 г/кг исходного сырь . From the data in the table, it can be seen that the introduction of various amounts of amine, reaching 300 g / t, has practically no effect on the oxidation rate. Example. The reaction vessel for 146 g of trichlorethylene is installed in the chamber of the Y-radiation source of radioactive cobalt, heated to 65 ° C and oxygen is passed at a rate of 0.4 l / min for 5 hours. The dose rate absorbed by trichlorethylene at the site of vessel establishment is 40 rad.sec. 120 g / t of triethyl mine is introduced into the initial t.chloroethylene. After cessation of irradiation, the reacted liquid contains 61.4% dichloroacetic acid chloride and 38.6% trichlorethylene, which are separated by distillation. The yield of the target product pas reacted trichlorethylene - 97%. The method of obtaining dichloroacetic acid chloride by oxidizing trichlorethylene with oxygen-containing gases under the influence of ionizing radiation, followed by separation of the target product, characterized in that, in order to increase the selectivity of the process, the latter is carried out in the presence of an amine, for example, triethylamine, taken in the amount not less than g / kg of feedstock.

SU1645672A 1971-04-12 1971-04-12 Method of producing chloroanhydride dichloroacetic SU368226A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1645672A SU368226A1 (en) 1971-04-12 1971-04-12 Method of producing chloroanhydride dichloroacetic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1645672A SU368226A1 (en) 1971-04-12 1971-04-12 Method of producing chloroanhydride dichloroacetic

Publications (1)

Publication Number Publication Date
SU368226A1 true SU368226A1 (en) 1973-01-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1645672A SU368226A1 (en) 1971-04-12 1971-04-12 Method of producing chloroanhydride dichloroacetic

Country Status (1)

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SU (1) SU368226A1 (en)

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