RU93001121A - METHOD FOR PRODUCING PURIFIED 2,4-DICHLOROPHENOXYUXIC ACID - Google Patents

METHOD FOR PRODUCING PURIFIED 2,4-DICHLOROPHENOXYUXIC ACID

Info

Publication number
RU93001121A
RU93001121A RU93001121/04A RU93001121A RU93001121A RU 93001121 A RU93001121 A RU 93001121A RU 93001121/04 A RU93001121/04 A RU 93001121/04A RU 93001121 A RU93001121 A RU 93001121A RU 93001121 A RU93001121 A RU 93001121A
Authority
RU
Russia
Prior art keywords
purification
acid
dichlorophenoxyuxic
producing purified
dichlorophenoxyacetic acid
Prior art date
Application number
RU93001121/04A
Other languages
Russian (ru)
Other versions
RU2149157C1 (en
Inventor
А.А. Ермаков
В.И. Назаров
Н.И. Поломарчук
Л.В. Ягофарова
В.А. Глобин
В.Я. Железняк
В.С. Терентьев
П.М. Астафьев
Original Assignee
А.А. Ермаков
В.И. Назаров
Н.И. Поломарчук
Л.В. Ягофарова
В.А. Глобин
В.Я. Железняк
В.С. Терентьев
П.М. Астафьев
Filing date
Publication date
Application filed by А.А. Ермаков, В.И. Назаров, Н.И. Поломарчук, Л.В. Ягофарова, В.А. Глобин, В.Я. Железняк, В.С. Терентьев, П.М. Астафьев filed Critical А.А. Ермаков
Priority to RU93001121A priority Critical patent/RU2149157C1/en
Priority claimed from RU93001121A external-priority patent/RU2149157C1/en
Publication of RU93001121A publication Critical patent/RU93001121A/en
Application granted granted Critical
Publication of RU2149157C1 publication Critical patent/RU2149157C1/en

Links

Claims (1)

Существующие в промышленности способы получения очищенной 2,4-дихлорфеноксиуксусной кислоты связаны с очисткой ее от минеральных солей и хлорфенолов. В промышленности очистка 2,4-дихлорфеноксиуксусной кислоты от изомеров осуществляется главным образом за счет получения чистого исходного 2,4-дихлорфенола. Предложенный способ получения очищенной от других изомеров 2,4-дихлорфеноксиуксусной кислоты отличается от известных способов тем, что очистку ведут путем дробной кристаллизации реакционной массы используя различную степень диссоциации феноксиуксусных кислот.Existing industrial methods for producing purified 2,4-dichlorophenoxyacetic acid are associated with the purification of it from mineral salts and chlorophenols. In industry, the purification of 2,4-dichlorophenoxyacetic acid from isomers is carried out mainly by obtaining the pure starting 2,4-dichlorophenol. The proposed method for obtaining purified from other isomers of 2,4-dichlorophenoxyacetic acid differs from the known methods in that the purification is carried out by fractional crystallization of the reaction mass using a different degree of dissociation of phenoxyacetic acids.
RU93001121A 1993-01-06 1993-01-06 Method of preparing purified 2,4-dichlorophenoxylacetic acid RU2149157C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU93001121A RU2149157C1 (en) 1993-01-06 1993-01-06 Method of preparing purified 2,4-dichlorophenoxylacetic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU93001121A RU2149157C1 (en) 1993-01-06 1993-01-06 Method of preparing purified 2,4-dichlorophenoxylacetic acid

Publications (2)

Publication Number Publication Date
RU93001121A true RU93001121A (en) 1996-11-27
RU2149157C1 RU2149157C1 (en) 2000-05-20

Family

ID=20135391

Family Applications (1)

Application Number Title Priority Date Filing Date
RU93001121A RU2149157C1 (en) 1993-01-06 1993-01-06 Method of preparing purified 2,4-dichlorophenoxylacetic acid

Country Status (1)

Country Link
RU (1) RU2149157C1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109053409B (en) * 2017-06-13 2021-12-24 江西天宇化工有限公司 Preparation method of 2,4-D
CN117142946A (en) * 2023-10-27 2023-12-01 山东海化集团有限公司 Clean purification process of 2, 4-dichlorophenoxyacetic acid

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