SU60089A1 - Method for producing benzoic acid - Google Patents
Method for producing benzoic acidInfo
- Publication number
- SU60089A1 SU60089A1 SU3141A SU3141A SU60089A1 SU 60089 A1 SU60089 A1 SU 60089A1 SU 3141 A SU3141 A SU 3141A SU 3141 A SU3141 A SU 3141A SU 60089 A1 SU60089 A1 SU 60089A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- benzoic acid
- producing benzoic
- acid
- copper
- catalyst
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
в американском патенте № 1645180 описан способ получени бензойной кислоты путем нагревани фталатов в присутствии катализатора, например , окисных солей меди, с последующей отгонкой готового пройукта с парами воды.U.S. Patent No. 1645180 describes a method for producing benzoic acid by heating phthalates in the presence of a catalyst, for example, copper oxide salts, followed by distilling the finished product with water vapor.
Авторы насто щего изобретени предлагают получать бензойную кислоту нагреванием в автоклаве вод ных растворов фталевой кислоты в -присутствии закксных солей меди, как катализатора. При применении закисных солей меди реакци декарбоксилировани проходит быстро и полно даже в том случае, когда беретс раствор фталевой кислоты, а не ее солей. В результате процесса получаетс овойодна бензойна кислота, после отделени которой из маточника катализатор легко регенерируетс .The authors of the present invention propose to obtain benzoic acid by heating in an autoclave aqueous solutions of phthalic acid in the presence of coxted copper salts as a catalyst. With the use of cuprous oxide salts, the decarboxylation reaction proceeds quickly and completely, even when a solution of phthalic acid is taken and not its salts. As a result of the process, a single benzoic acid is obtained, after which the catalyst is easily regenerated after separation from the mother liquor.
Пример. В автоклав с рубашкой из меди загружают 100 г технического фталевого анги дрида, 250 мл воды и 10-15 г закиси меди , полученной восстановлением серно-кислой меди. Смесь нагревают в течение 2 часов при 210° и 20 атм-.Example. 100 g of technical phthalic angi dride, 250 ml of water and 10-15 g of cuprous oxide, obtained by reduction of sulfuric acid copper, are loaded into an autoclave with a jacket made of copper. The mixture is heated for 2 hours at 210 ° and 20 atm.
давлени . После нагревани образующуюс бензойную кислоту нелосредственно из автоклава отгон ют перегретым паром. К остатку, содержащему весь катализатор, добавл ют навую порцию фталевого ангидрида и воды и смесь подвергают нагреву и той же обработке.pressure. After heating, the resulting benzoic acid is directly distilled from the autoclave with superheated steam. To the residue containing the entire catalyst, a bulk portion of phthalic anhydride and water is added and the mixture is heated and subjected to the same treatment.
Выход бензойной кислоты около 90% теоретически возможного. Содержание бензойной кислоты в выделенном при отгонке с перегретым паром про-дукте - 99,6%.Benzoic acid yield is about 90% theoretically possible. The content of benzoic acid in the product separated during distillation with superheated steam is 99.6%.
Полученна таки-м путем бензойна кислота без дальнейшей очистки обрабатываетс бикарбонатом натри и переводитс в бензойнокислый натрий.The resulting benzoic acid, without further purification, is treated with sodium bicarbonate and converted into sodium benzoate.
Предмет изобретени .The subject matter of the invention.
Способ получени бензойной кислоты путем нагревани водных растворов фталевой кислоты или фталевого ангидрида в автоклаве в присутствии катализаторов, например, солей меди, отличающийс тем, что в качестве катализатора примен ют закисные соли меди.A method of producing benzoic acid by heating aqueous solutions of phthalic acid or phthalic anhydride in an autoclave in the presence of catalysts, for example, copper salts, characterized in that the copper salts of acid are used as the catalyst.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3141A SU60089A1 (en) | 1939-05-16 | 1939-05-16 | Method for producing benzoic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU3141A SU60089A1 (en) | 1939-05-16 | 1939-05-16 | Method for producing benzoic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
SU60089A1 true SU60089A1 (en) | 1940-11-30 |
Family
ID=48242042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU3141A SU60089A1 (en) | 1939-05-16 | 1939-05-16 | Method for producing benzoic acid |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU60089A1 (en) |
-
1939
- 1939-05-16 SU SU3141A patent/SU60089A1/en active
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