PL423698A1 - Method for producing salicylic acid with increased purity - Google Patents
Method for producing salicylic acid with increased purityInfo
- Publication number
- PL423698A1 PL423698A1 PL423698A PL42369817A PL423698A1 PL 423698 A1 PL423698 A1 PL 423698A1 PL 423698 A PL423698 A PL 423698A PL 42369817 A PL42369817 A PL 42369817A PL 423698 A1 PL423698 A1 PL 423698A1
- Authority
- PL
- Poland
- Prior art keywords
- salicylic acid
- acid
- salt
- salicylate
- neutralization reaction
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Przedmiotem zgłoszenia jest sposób wytwarzania kwasu salicylowego o podwyższonej czystości polegający na reakcji zobojętnienia soli kwasu salicylowego charakteryzujący się tym, że sól kwasu salicylowego poddaje się reakcji zobojętnienia kwasem, w środowisku wodnym, po czym otrzymany kwas salicylowy rozpuszcza się w mieszaninie reakcyjnej, a po krystalizacji odsącza się go i przemywa. Korzystnie jest, gdy jako sól kwasu salicylowego stosuje się sól zawierającą metal. Korzystnie, gdy jest to salicylan sodu lub salicylan potasu lub salicylan magnezu. Korzystnie jest również, gdy jako sól kwasu salicylowego stosuje się sól zawierającą amoniak lub resztę aminową. Korzystnie, gdy jest to salicylan choliny. Korzystnie jest, gdy reakcję zobojętnienia prowadzi się przy użyciu kwasu nieorganicznego lub kwasu organicznego. Korzystnie, gdy jest to kwas solny lub kwas octowy. Rozpuszczanie otrzymanego kwasu salicylowego prowadzi się korzystnie w podwyższonej temperaturze, najlepiej w temperaturze wrzenia. Otrzymany kwas salicylowy korzystnie jest przemywać wodą.The subject of the application is a method of producing salicylic acid with increased purity consisting of a neutralization reaction of a salicylic acid salt characterized in that the salicylic acid salt is subjected to an acid neutralization reaction in an aqueous medium, after which the obtained salicylic acid dissolves in the reaction mixture and, after crystallization, is filtered off. wash and wash it. Preferably a metal-containing salt is used as the salicylic acid salt. Preferably it is sodium salicylate or potassium salicylate or magnesium salicylate. It is also preferred if a salt containing ammonia or an amino residue is used as the salicylic acid salt. Preferably it is choline salicylate. Preferably, the neutralization reaction is carried out using an inorganic acid or organic acid. Preferably it is hydrochloric acid or acetic acid. The dissolution of the salicylic acid obtained is preferably carried out at elevated temperature, preferably at boiling point. The resulting salicylic acid is preferably washed with water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL423698A PL423698A1 (en) | 2017-12-04 | 2017-12-04 | Method for producing salicylic acid with increased purity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL423698A PL423698A1 (en) | 2017-12-04 | 2017-12-04 | Method for producing salicylic acid with increased purity |
Publications (1)
Publication Number | Publication Date |
---|---|
PL423698A1 true PL423698A1 (en) | 2019-06-17 |
Family
ID=66809652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PL423698A PL423698A1 (en) | 2017-12-04 | 2017-12-04 | Method for producing salicylic acid with increased purity |
Country Status (1)
Country | Link |
---|---|
PL (1) | PL423698A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB986867A (en) * | 1962-09-07 | 1965-03-24 | Dow Chemical Co | Method of preparing salicylic acid |
US4137258A (en) * | 1978-04-07 | 1979-01-30 | The Dow Chemical Company | Process for making pure salicylic acid |
JPS62106047A (en) * | 1985-10-29 | 1987-05-16 | ロ−ヌ−プ−ラン・スペシアリテ・シミ−ク | Separation and purification of salicylic acid |
PL331398A1 (en) * | 1999-02-11 | 2000-08-14 | Inst Chemii Przemyslowej Im Pr | Method of purifying crude salicylic acid |
CN105418402A (en) * | 2015-11-30 | 2016-03-23 | 山东新华制药股份有限公司 | Production technology of salicylic acid |
-
2017
- 2017-12-04 PL PL423698A patent/PL423698A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB986867A (en) * | 1962-09-07 | 1965-03-24 | Dow Chemical Co | Method of preparing salicylic acid |
US4137258A (en) * | 1978-04-07 | 1979-01-30 | The Dow Chemical Company | Process for making pure salicylic acid |
JPS62106047A (en) * | 1985-10-29 | 1987-05-16 | ロ−ヌ−プ−ラン・スペシアリテ・シミ−ク | Separation and purification of salicylic acid |
PL331398A1 (en) * | 1999-02-11 | 2000-08-14 | Inst Chemii Przemyslowej Im Pr | Method of purifying crude salicylic acid |
CN105418402A (en) * | 2015-11-30 | 2016-03-23 | 山东新华制药股份有限公司 | Production technology of salicylic acid |
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