GB1491284A - Preparation of dimethyl terephthalate - Google Patents
Preparation of dimethyl terephthalateInfo
- Publication number
- GB1491284A GB1491284A GB23681/75A GB2368175A GB1491284A GB 1491284 A GB1491284 A GB 1491284A GB 23681/75 A GB23681/75 A GB 23681/75A GB 2368175 A GB2368175 A GB 2368175A GB 1491284 A GB1491284 A GB 1491284A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimethyl terephthalate
- heavy metal
- metal catalyst
- distillation residue
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 title abstract 10
- 238000002360 preparation method Methods 0.000 title abstract 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract 6
- 238000004821 distillation Methods 0.000 abstract 4
- 239000003054 catalyst Substances 0.000 abstract 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 abstract 2
- 229910001882 dioxygen Inorganic materials 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- 239000011541 reaction mixture Substances 0.000 abstract 2
- 238000004064 recycling Methods 0.000 abstract 2
- 238000009835 boiling Methods 0.000 abstract 1
- 238000005886 esterification reaction Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- QSSJZLPUHJDYKF-UHFFFAOYSA-N methyl 4-methylbenzoate Chemical compound COC(=O)C1=CC=C(C)C=C1 QSSJZLPUHJDYKF-UHFFFAOYSA-N 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1491284 Preparation of dimethylterephthalate TEIJIN HERCULES CHEMICAL CO Ltd 30 May 1975 23681/75 Heading C2C A process for preparing dimethyl terephthalate comprises oxidizing p-xylene and/or methyl p-toluate with molecular oxygen or a molecular oxygen-containing gas in the presence of a heavy metal catalyst, esterifying the resulting oxidation reaction mixture with methanol, followed by submitting the resulting esterification reaction mixture to distillation to separate dimethyl terephthalate and fractions of lower boiling point than dimethyl terephthalate, and then recycling to said oxidation step (A) a distillation residue containing said heavy metal catalyst and/or (B) an extract portion containing said heavy metal catalyst obtained by an extraction treatment of said distillation residue (A), the distillation residue (A) or said extract (B) having been treated with methanol prior to recycling same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB23681/75A GB1491284A (en) | 1975-05-30 | 1975-05-30 | Preparation of dimethyl terephthalate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB23681/75A GB1491284A (en) | 1975-05-30 | 1975-05-30 | Preparation of dimethyl terephthalate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1491284A true GB1491284A (en) | 1977-11-09 |
Family
ID=10199553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23681/75A Expired GB1491284A (en) | 1975-05-30 | 1975-05-30 | Preparation of dimethyl terephthalate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1491284A (en) |
-
1975
- 1975-05-30 GB GB23681/75A patent/GB1491284A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |