SU1497994A1 - Способ получения ванилина - Google Patents

Способ получения ванилина

Info

Publication number
SU1497994A1
SU1497994A1 SU4205179/04A SU4205179A SU1497994A1 SU 1497994 A1 SU1497994 A1 SU 1497994A1 SU 4205179/04 A SU4205179/04 A SU 4205179/04A SU 4205179 A SU4205179 A SU 4205179A SU 1497994 A1 SU1497994 A1 SU 1497994A1
Authority
SU
USSR - Soviet Union
Prior art keywords
vanillin
solution
acid
aqueous
precipitate
Prior art date
Application number
SU4205179/04A
Other languages
English (en)
Inventor
А.Д. Булат
С.В. Некрасов
Б.В. Пассет
В.Г. Фошкин
Original Assignee
Ленинградский химико-фармацевтический институт
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 Ленинградский химико-фармацевтический институт filed Critical Ленинградский химико-фармацевтический институт
Priority to SU4205179/04A priority Critical patent/SU1497994A1/ru
Application granted granted Critical
Publication of SU1497994A1 publication Critical patent/SU1497994A1/ru

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Изобретение относится к карбонильным соединениям, в частности к получению ванилина, который используют в пищевой и парфюмерной промышленности. Цель изобретения повышение выхода целевого продукта и упрощение процесса. Получение ванилина ведут конденсацией гваякола с формальдегидом в присутствии п-нитрозодиметиланилина и катализатора-сульфата меди в кислом воднопропанольном растворе. Ванилин из реакционной массы после конденсации гваякола и формальдегида в присутствии п-нитрозодиметиланилина в водноизопропанольном растворе извлекают в виде осадка дигидрохлорида ванилиден-п-диметиланилина. Для образования последнего в массу загружают водно-кислый раствор дигидрохлорида п-диметиламиноанилина, осадок отфильтровывают, растворяют в разбавленной соляной кислоте, из полученного раствора ванилин экстрагируют органическим растворителем (например, бензолом), растворитель отгоняют, а оставшийся водно-кислый слой раствор соли п-диметиламиноанилина, направляют на осаждение соли азометина в последующей операции. Выход 75,8% 1 табл.
SU4205179/04A 1987-03-04 1987-03-04 Способ получения ванилина SU1497994A1 (ru)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU4205179/04A SU1497994A1 (ru) 1987-03-04 1987-03-04 Способ получения ванилина

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU4205179/04A SU1497994A1 (ru) 1987-03-04 1987-03-04 Способ получения ванилина

Publications (1)

Publication Number Publication Date
SU1497994A1 true SU1497994A1 (ru) 1995-11-10

Family

ID=60526946

Family Applications (1)

Application Number Title Priority Date Filing Date
SU4205179/04A SU1497994A1 (ru) 1987-03-04 1987-03-04 Способ получения ванилина

Country Status (1)

Country Link
SU (1) SU1497994A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112409146A (zh) * 2020-12-08 2021-02-26 南通亚香食品科技有限公司 一种香兰素的连续制备工艺

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112409146A (zh) * 2020-12-08 2021-02-26 南通亚香食品科技有限公司 一种香兰素的连续制备工艺
CN112409146B (zh) * 2020-12-08 2023-07-07 南通亚香食品科技有限公司 一种香兰素的连续制备工艺

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