SU943236A1 - Process for producing dipicolinic acid - Google Patents
Process for producing dipicolinic acid Download PDFInfo
- Publication number
- SU943236A1 SU943236A1 SU792839260A SU2839260A SU943236A1 SU 943236 A1 SU943236 A1 SU 943236A1 SU 792839260 A SU792839260 A SU 792839260A SU 2839260 A SU2839260 A SU 2839260A SU 943236 A1 SU943236 A1 SU 943236A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dipicolinic acid
- dimethylpyridine
- oxidation
- acid
- carried out
- Prior art date
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- Pyridine Compounds (AREA)
Description
II
Изобретение относитс к усовершенствованному способу получени дипиколиновой кислоты, котора находит применение в синтезе лекарственных препаратов , в частности антисклеротического препарата пармидина.The invention relates to an improved process for the preparation of dipicolinic acid, which is used in the synthesis of drugs, in particular the anti-sclerotic drug parmidine.
Известен двухстадийный способ получени ДИПИКОЛИНОВОЙ кислоты путем окислени 2,6-диметилпиридина бихроматом натри в сернокислой среде при 70-115°С. На первой стадии реакции образуетс аддукт дипиколиновой кислоты с хромовым ангидридом, который .на второй стадии гидролизуют при 50-11 1.A two-stage process for the preparation of DIPICOLIC acid by oxidation of 2,6-dimethylpyridine with sodium bichromate in sulfuric acid at 70-115 ° C is known. In the first stage of the reaction, an adduct of dipicolinic acid with chromic anhydride is formed, which in the second stage is hydrolyzed at 50-11 1.
Недостатками известного способа вл ютс необходимость проведени двухстадийного процесса, что усложн ет аппаратурное оформление,. а также образование большого количества неутилизируемых твердых отходов в сточных водах (на 1 т дипиколиновой кислоты получают 4 г сульфата хрома) и нейтрализаци последних в результате использовани большого количества серной кислоты.The disadvantages of this method are the need for a two-step process, which complicates the instrumentation. as well as the formation of a large amount of non-utilizable solid waste in wastewater (4 g of chromium sulfate are obtained per 1 ton of dipicolinic acid) and neutralization of the latter by using a large amount of sulfuric acid.
Цель изобретени - упрощение технологии процесса и сокращенТ ё количества твердых отходов в сточных , водах.The purpose of the invention is to simplify the process technology and reduce the amount of solid waste in wastewater.
Указанна цель достигаетс тем, что получают дипиколиновую кислоту путем окислени водного раствора 2,6-диметилпиридина озоно-кислородной смесью в присутствии катализатора пирофосфата марганца и уксусной кислоты.This goal is achieved by the production of dipicolinic acid by oxidation of an aqueous solution of 2,6-dimethylpyridine with an ozone-oxygen mixture in the presence of a manganese pyrophosphate catalyst and acetic acid.
Предпочтительно процесс провод т при мольном соотношении пирофосфата Preferably, the process is carried out at a molar ratio of pyrophosphate
15 марганца и 2,6-диметилпиридина 0,5 1:15.15 manganese and 2,6-dimethylpyridine 0.5 1:15.
Предложенный способ позвол ет проводить процесс окислени в одну стадию , что упрощает его технологию, The proposed method allows the oxidation process to be carried out in one stage, which simplifies its technology,
а также использовать безбалластный окислитель - озоногкислородную смесь. Образующиес маточные растворы примен ют многократно (10-15 раз),and also to use a ballast free oxidizer - ozone-oxygen mixture. The resulting mother liquors are used repeatedly (10-15 times),
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792839260A SU943236A1 (en) | 1979-11-13 | 1979-11-13 | Process for producing dipicolinic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792839260A SU943236A1 (en) | 1979-11-13 | 1979-11-13 | Process for producing dipicolinic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
SU943236A1 true SU943236A1 (en) | 1982-07-15 |
Family
ID=20859049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792839260A SU943236A1 (en) | 1979-11-13 | 1979-11-13 | Process for producing dipicolinic acid |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU943236A1 (en) |
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1979
- 1979-11-13 SU SU792839260A patent/SU943236A1/en active
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