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RU2016120999A - Способ приготовления солей карбоновой кислоты, обладающих гербицидным действием - Google Patents

Способ приготовления солей карбоновой кислоты, обладающих гербицидным действием Download PDF

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RU2016120999A
RU2016120999A RU2016120999A RU2016120999A RU2016120999A RU 2016120999 A RU2016120999 A RU 2016120999A RU 2016120999 A RU2016120999 A RU 2016120999A RU 2016120999 A RU2016120999 A RU 2016120999A RU 2016120999 A RU2016120999 A RU 2016120999A
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carboxylic acid
base
solvent
dicamba
alkali metal
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RU2016120999A
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RU2664642C2 (ru
RU2016120999A3 (ru
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Джеймс Тимоти БРИСТОУ
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Ротам Агрокем Интернэшнл Компани Лимитед
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Claims (32)

1. Способ приготовления гербицидно активной соли карбоновой кислоты, который включает стадии:
i) объединения карбоновой кислоты с высококипящим, не смешивающимся с водой органическим растворителем для получения раствора или суспензии;
ii) обработки полученного на стадии (i) раствора или суспензии основанием для образования соли карбоновой кислоты;
iii) удаления растворителя из полученной на стадии (ii) смеси для получения кека соли карбоновой кислоты; и
iv) высушивания полученного на стадии (iii) кека.
2. Способ по п. 1, в котором карбоновую кислоту выбирают из бензойных кислот, феноксикарбоновых кислот, пиридинкарбоновых кислот и хинолинкарбоновых кислот.
3. Способ по п. 2, в котором карбоновую кислоту выбирают из группы, состоящей из дикамбы, трикамбы, 2,4-D, МСРА, пиклорама, клопиралида и хинклорака.
4. Способ по п. 3, в котором карбоновая кислота представляет собой дикамбу.
5. Способ по любому из пп. 1-4, в котором растворитель имеет низкую или, по существу, отсутствующую склонность к сольватации соли карбоновой кислоты.
6. Способ по п. 1, в котором карбоновая кислота является растворимой в растворителе.
7. Способ по п. 1, в котором растворитель имеет точку кипения по меньшей мере 70°C.
8. Способ по п. 1, в котором растворитель выбирают из толуола, ксилола, н-бутанола, пентанолов, гексанолов, гептанолов и их смесей.
9. Способ по п. 1, в котором растворитель образует азеотроп с водой.
10. Способ по п. 9, в котором на стадии (iii) растворитель удаляют вместе с водой во время протекания реакции между карбоновой кислотой и основанием на стадии (ii).
11. Способ по п. 10, в котором растворитель и воду удаляют азеотропной перегонкой.
12. Способ по любому из пп. 9-11, в котором точка кипения азеотропа ниже температуры реакции стадии (ii).
13. Способ по любому из пп. 9-11, в котором точка кипения азеотропа близка или, по существу, является такой же, как и температура реакции стадии (ii).
14. Способ по п. 1, в котором основание является неорганическим основанием.
15. Способ по п. 14, в котором основание является соединением металла группы I или группы II или соединением аммония.
16. Способ по п. 15, в котором основание выбирают из гидроксидов щелочных металлов, оксидов щелочных металлов, карбонатов щелочных металлов, гидрокарбонатов щелочных металлов, ацетатов щелочных металлов, формиатов щелочных металлов и аммиака.
17. Способ по п. 1, в котором основание является органическим основанием.
18. Способ по п. 17, в котором основание является алкилзамещенным первичным, вторичным и третичным амином, имеющим от 1 до 4 атомов углерода.
19. Способ по п. 1, в котором основание подают на стадии (ii) в виде водной смеси или раствора.
20. Способ по п. 1, в котором реакцию на стадии (ii) проводят при температуре от 50 до 200°C.
21. Способ по п. 1, в котором на стадии (ii) обеспечивают от 97 до 100% стехиометрического количества основания, требующегося для реакции с карбоновой кислотой.
22. Способ по п. 1, в котором растворитель удаляют на стадии (iii) центрифугированием.
23. Способ изготовления дикамба-натрия, включающей стадии:
(1) растворения карбоновой кислоты, состоящей, по существу, из дикамбы, в высококипящем, не смешивающемся с водой инертном органическом растворителе для получения раствора или суспензии;
(2) обработки раствора или суспензии дикамбы со стадии (1) основанием, выбранным из гидроксида натрия, бикарбоната натрия и их смесей, в мольном соотношении 1:0,97±0,6% для образования дикамба-натрия;
(3) центрифугирования реакционной смеси со стадии (2) для получения кека соли дикамба-натрия; и
(4) высушивания кека дикамба-натрия, приготовленного на стадии (3), для получения сухого дикамба-натрия, устойчиво демонстрирующего при растворении в воде показатель рН между около 7 и 10.
24. Гербицидно активная соль карбоновой кислоты, приготовленная способом по любому из пп. 1-22.
RU2016120999A 2013-10-30 2014-06-19 Способ приготовления солей карбоновой кислоты, обладающих гербицидным действием RU2664642C2 (ru)

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