MX3016E - IMPROVED PROCEDURE FOR OBTAINING ETHYLENE GLYCOL ESTERS AND TEREPHTHALIC ACID - Google Patents
IMPROVED PROCEDURE FOR OBTAINING ETHYLENE GLYCOL ESTERS AND TEREPHTHALIC ACIDInfo
- Publication number
- MX3016E MX3016E MX100139U MX10013975U MX3016E MX 3016 E MX3016 E MX 3016E MX 100139 U MX100139 U MX 100139U MX 10013975 U MX10013975 U MX 10013975U MX 3016 E MX3016 E MX 3016E
- Authority
- MX
- Mexico
- Prior art keywords
- terephthalic acid
- ethylene glycol
- glycol
- temperature
- glycol esters
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/03—Preparation of carboxylic acid esters by reacting an ester group with a hydroxy group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/76—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
- C07C69/80—Phthalic acid esters
- C07C69/82—Terephthalic acid esters
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
La presente invención se refiere a un procedimiento mejorado para la obtención de ésteres de etilenglicol y ácido tereftálico, que consiste en la transesterificación contínua de dimetiltereftalato con el glicol del etileno, en una relación molar de: 1.6 a 1 : 2 a temperatura de 140 a 240°C, en un reactor de varias etapas y disminución subsiguiente de la porción de glicol a presión reducida, caracterizado porque se aspira la mezcla de transeterificación a partir de la última etapa del reactor continuamente en una zona de presión reducida, en la cual se mantiene una temperatura de que se halla en 10 a 40°C por encima del punto de solidificación del producto terminal y en donde se regula la presión de tal manera que dentro del tiempo de permanencia en esta zona se separará por destilación del producto una cantidad de glicol necesaria para ajustar la relación molar de ácido tereftálico respecto al glicol en el valor deseado dentro del producto terminal entre 1 : 1.45 y 1 : 1.15, y porque se aplica o se gotea el producto retirado de esta zona sobre una superficie calentada a una temperatura comprendida entre 40°C y 100°C y preferiblemente 70 a 90°C y se separa la misma en forma de escamas sólidas o pastillas.The present invention relates to an improved process for obtaining ethylene glycol and terephthalic acid esters, which consists of the continuous transesterification of dimethylterephthalate with ethylene glycol, in a molar ratio of: 1.6 to 1: 2 at a temperature of 140 to 240 ° C, in a multi-stage reactor and subsequent decrease of the glycol portion at reduced pressure, characterized in that the transeterification mixture from the last stage of the reactor is sucked continuously in a zone of reduced pressure, in which maintains a temperature that is 10 to 40 ° C above the solidification point of the terminal product and where the pressure is regulated in such a way that within the residence time in this area a quantity of glycol required to adjust the molar ratio of terephthalic acid to glycol to the desired value within the end product between 1: 1.45 and 1: 1.15, and because the product removed from this zone is applied or drips onto a surface heated to a temperature between 40 ° C and 100 ° C and preferably 70 to 90 ° C and it separates in the form of solid flakes or tablets.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752504156 DE2504156A1 (en) | 1975-02-01 | 1975-02-01 | LOW MOLECULAR MOLECULAR TEREPHTHAL ACID AETHYLENE GLYCOLESTER, THEIR PREPARATION AND USE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MX3016E true MX3016E (en) | 1980-02-04 |
Family
ID=5937840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MX100139U MX3016E (en) | 1975-02-01 | 1975-11-24 | IMPROVED PROCEDURE FOR OBTAINING ETHYLENE GLYCOL ESTERS AND TEREPHTHALIC ACID |
Country Status (16)
| Country | Link |
|---|---|
| JP (1) | JPS51101946A (en) |
| BE (1) | BE838080A (en) |
| BR (1) | BR7600251A (en) |
| CA (1) | CA1081245A (en) |
| DD (1) | DD123738A5 (en) |
| DE (1) | DE2504156A1 (en) |
| FR (1) | FR2299310A1 (en) |
| GB (1) | GB1511412A (en) |
| IN (1) | IN145144B (en) |
| IT (1) | IT1053475B (en) |
| MX (1) | MX3016E (en) |
| NL (1) | NL7600984A (en) |
| PL (1) | PL103014B1 (en) |
| RO (1) | RO69845A (en) |
| SU (1) | SU625598A3 (en) |
| TR (1) | TR18730A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2175897B (en) * | 1984-08-14 | 1987-12-16 | Mitsubishi Chem Ind | Process for preparing tetramethyl biphenyltetracarboxylate |
| KR100701842B1 (en) * | 1999-08-04 | 2007-04-02 | 가부시키가이샤 아이에스 | Bis-?-hydroxyethyl terephthalate production process and purification process |
| US6380352B1 (en) * | 2000-08-29 | 2002-04-30 | Eastman Chemical Company | Polyester precursor purification process |
-
1975
- 1975-02-01 DE DE19752504156 patent/DE2504156A1/en not_active Withdrawn
- 1975-11-24 MX MX100139U patent/MX3016E/en unknown
- 1975-12-15 DD DD190149A patent/DD123738A5/xx unknown
-
1976
- 1976-01-16 BR BR7600251A patent/BR7600251A/en unknown
- 1976-01-27 TR TR18730A patent/TR18730A/en unknown
- 1976-01-29 GB GB3648/76A patent/GB1511412A/en not_active Expired
- 1976-01-29 SU SU762317700A patent/SU625598A3/en active
- 1976-01-30 FR FR7602570A patent/FR2299310A1/en active Granted
- 1976-01-30 IT IT7647875A patent/IT1053475B/en active
- 1976-01-30 BE BE163933A patent/BE838080A/en unknown
- 1976-01-30 NL NL7600984A patent/NL7600984A/en not_active Application Discontinuation
- 1976-01-31 PL PL1976186951A patent/PL103014B1/en unknown
- 1976-01-31 RO RO7684665A patent/RO69845A/en unknown
- 1976-02-02 CA CA245,053A patent/CA1081245A/en not_active Expired
- 1976-02-02 JP JP51010222A patent/JPS51101946A/en active Pending
- 1976-02-13 IN IN262/CAL/1976A patent/IN145144B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| SU625598A3 (en) | 1978-09-25 |
| FR2299310A1 (en) | 1976-08-27 |
| JPS51101946A (en) | 1976-09-08 |
| GB1511412A (en) | 1978-05-17 |
| RO69845A (en) | 1981-07-30 |
| FR2299310B1 (en) | 1979-05-18 |
| BE838080A (en) | 1976-05-14 |
| PL103014B1 (en) | 1979-05-31 |
| DD123738A5 (en) | 1977-01-12 |
| IN145144B (en) | 1978-09-02 |
| IT1053475B (en) | 1981-08-31 |
| DE2504156A1 (en) | 1976-08-05 |
| NL7600984A (en) | 1976-08-03 |
| CA1081245A (en) | 1980-07-08 |
| BR7600251A (en) | 1976-08-31 |
| TR18730A (en) | 1977-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AR008459A1 (en) | PROCEDURE FOR PREPARING ESTERS OF FATTY ACIDS | |
| AR028789A1 (en) | PROCESS TO PREPARE A RENTAL ESTER OF A CARBOXYL ACID BY TRANSESTERIFICATION | |
| GB1272640A (en) | Delayed or sustained release medicament dosages and a process for their manufacture | |
| IT1047090B (en) | PROCEDURE FOR THE PRODUCTION OF AROMATIC ESTERS OF PARTICULARLY PURE CYANIC ACID AND PRODUCTS SO OBTAINED | |
| MX3016E (en) | IMPROVED PROCEDURE FOR OBTAINING ETHYLENE GLYCOL ESTERS AND TEREPHTHALIC ACID | |
| WO2003014271A3 (en) | New methods for the preparation of propylene glycol fatty acid esters | |
| GB2057436A (en) | Process for the preparation of sucroglycerides | |
| US2693435A (en) | Vitamin a ester composition and process of preparing vitamin a ester | |
| EP1770082B1 (en) | Process for producing sorbitan fatty acid ester | |
| JP2019052134A5 (en) | ||
| JPH06166660A (en) | Production of chain carbonic acid ester compound | |
| US2331094A (en) | Preparation of esters | |
| Grigoryan et al. | Obtaining esters of citric acid with high aliphatic alcohols | |
| JPS5798235A (en) | Preparation of metallic soap | |
| Ross et al. | The stability and constitution of monoglycerides | |
| EP3237368B1 (en) | Lactylate purification process | |
| GB1500356A (en) | Process for the continuous preparation of di-tertiary-butylcresols | |
| US2476609A (en) | Manufacture of condensation products | |
| US2577418A (en) | Tall oil-melamine reaction product | |
| US2390027A (en) | Ester products of 12-hydroxystearic acid | |
| ES8105332A1 (en) | Method for the preparation of metal salts of phosphorus acid esters | |
| SU125559A1 (en) | Method for preparing amino-substituted di- and trialkyl phosphate esters | |
| US2770648A (en) | Preparation of hydroxybenzoic esters by alcoholysis | |
| JPS55100326A (en) | Preparation of omega-alken-1-ol | |
| US3642875A (en) | Beta-acetoxypivalic anhydride and process for making same |