RO98744B1 - Process for obtaining high-pressure terephtalic acid - Google Patents
Process for obtaining high-pressure terephtalic acidInfo
- Publication number
- RO98744B1 RO98744B1 RO129649A RO12964987A RO98744B1 RO 98744 B1 RO98744 B1 RO 98744B1 RO 129649 A RO129649 A RO 129649A RO 12964987 A RO12964987 A RO 12964987A RO 98744 B1 RO98744 B1 RO 98744B1
- Authority
- RO
- Romania
- Prior art keywords
- solutions
- obtaining high
- pressure
- terephtalic acid
- terephthalic acid
- Prior art date
Links
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 title abstract 5
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 abstract 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 abstract 1
- 239000012670 alkaline solution Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Prezenta inventie se refera la un procedeu de obtinere a acidului tereftalic de înalta puritate. Procedeul, conform inventiei, consta în aceea ca dimetiltereftalatul se hidrolizeaza cu solutii apoase de hidroxizi alcalini de concentratii cuprinse între 5 si 20%, în raport gravimetric 1:1-0,2:1, la presiune atmosferica si temperatura cuprinsa în intervalul 80...110 degree C, dupa care se precipita acidul tereftalic din solutiile sale alcaline cu solutii de acizi minerali, astfel încât concentratia solutiilor sarurilor obtinute sa se situeze între 5 si 20%g.The present invention relates to a process for obtaining high purity terephthalic acid. The process according to the invention consists in that the dimethyl terephthalate is hydrolysed with aqueous solutions of alkali hydroxides in concentrations between 5 and 20% in a gravimetric ratio of 1: 1-0.2: 1, at atmospheric pressure and temperature in the range of 80 ° C. .110 degrees C, after which the terephthalic acid precipitates from its alkaline solutions with mineral acid solutions so that the concentration of the solutions of the obtained salts is between 5 and 20% g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129649A RO98744B1 (en) | 1987-09-04 | 1987-09-04 | Process for obtaining high-pressure terephtalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129649A RO98744B1 (en) | 1987-09-04 | 1987-09-04 | Process for obtaining high-pressure terephtalic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO98744B1 true RO98744B1 (en) | 1990-04-30 |
Family
ID=40906839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO129649A RO98744B1 (en) | 1987-09-04 | 1987-09-04 | Process for obtaining high-pressure terephtalic acid |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO98744B1 (en) |
-
1987
- 1987-09-04 RO RO129649A patent/RO98744B1/en unknown
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