UST861029I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST861029I4 UST861029I4 US861029DH UST861029I4 US T861029 I4 UST861029 I4 US T861029I4 US 861029D H US861029D H US 861029DH US T861029 I4 UST861029 I4 US T861029I4
- Authority
- US
- United States
- Prior art keywords
- acid
- defensive publication
- published
- application
- defensive
- 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.)
- Pending
Links
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- -1 methyl-substituted benzenes Chemical class 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- ZBYYWKJVSFHYJL-UHFFFAOYSA-L cobalt(2+);diacetate;tetrahydrate Chemical compound O.O.O.O.[Co+2].CC([O-])=O.CC([O-])=O ZBYYWKJVSFHYJL-UHFFFAOYSA-L 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003022 phthalic acids Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 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
Definitions
- High purity phthalic acids such as terephthalic acid are prepared from methyl-substituted benzenes such as p-xylene in solution in aliphatic monocarboxylic acid (e.g., acetic acid) in the presence of cobalt-containing catalyst (e.g., cobalt acetate tetrahydrate) and Without the aid of a promoter, by contacting the reaction mixture, under essentially atmospheric pressure, *with substantially pure molecular oxygen for a period of at least days and preferably at least about 6.5 days, while agitating the reaction mixture and maintaining its temperature at about from to 105 C., and preferably at least C.
- cobalt-containing catalyst e.g., cobalt acetate tetrahydrate
- the resulting phthalic acid is collected, e.g., by filtration, washed with aliphatic acid solvent (e.g., acetic acid), and then dried to give (based on the Weight of initial methylswbstituted benzene) at least a 94% yield of phthalic acid (calculated as acid) which acid has a purity of at least about 97% by weight.
- aliphatic acid solvent e.g., acetic acid
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70740568A | 1968-02-23 | 1968-02-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST861029I4 true UST861029I4 (en) | 1969-04-15 |
Family
ID=24841562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US861029D Pending UST861029I4 (en) | 1968-02-23 | 1968-02-23 | Defensive publication |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | UST861029I4 (en)) |
| BE (1) | BE728749A (en)) |
| DE (1) | DE1908787A1 (en)) |
| FR (1) | FR2002471A1 (en)) |
| GB (1) | GB1188928A (en)) |
| NL (1) | NL6902768A (en)) |
-
1968
- 1968-02-23 US US861029D patent/UST861029I4/en active Pending
-
1969
- 1969-02-20 FR FR6904297A patent/FR2002471A1/fr not_active Withdrawn
- 1969-02-21 BE BE728749D patent/BE728749A/xx unknown
- 1969-02-21 DE DE19691908787 patent/DE1908787A1/de active Pending
- 1969-02-21 NL NL6902768A patent/NL6902768A/xx unknown
- 1969-02-24 GB GB9792/69A patent/GB1188928A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1908787A1 (de) | 1969-09-25 |
| GB1188928A (en) | 1970-04-22 |
| BE728749A (en)) | 1969-08-01 |
| FR2002471A1 (en) | 1969-10-17 |
| NL6902768A (en)) | 1969-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1004895A (en) | Process for the production of isophthalic and terephthalic acids | |
| GB1428831A (en) | Separation of aromatic carboxylic acids | |
| US2531173A (en) | Preparation of terephthalic acid | |
| US2894978A (en) | Process of producing esters of phthalic acids by oxidation of xylene and toluic acid ester mixtures | |
| JPH02184652A (ja) | 芳香族ポリカルボン酸の製造方法 | |
| KR800001084B1 (ko) | 고순도 테레프탈산의 제조방법 | |
| US2454274A (en) | Manufacture of mixed esters of glycols | |
| UST861029I4 (en) | Defensive publication | |
| EP0041785A1 (en) | Oxidation of substituted aromatic compounds to aromatic carboxylic acids | |
| US3431296A (en) | Process for preparation of high purity terephthalic acid | |
| US3456001A (en) | Process for purifying benzene carboxylic acids | |
| US2727919A (en) | Process for oxidizing polyalkylaromatic hydrocarbons and derivatives thereof using an acid anhydride catalyst | |
| US3406196A (en) | Oxidation of polyalkyl aromatics to polycarboxylic acids | |
| US2545870A (en) | Catalytic oxidation of alkyl benzenes to produce aryl alkyl ketones and carbinols | |
| US3865871A (en) | Process for producing aromatic tetracarboxylic acids and anhydrides thereof | |
| US3481975A (en) | Method of preparing dicarboxylic acids | |
| EP0041784A1 (en) | Oxidation of substituted aromatic compounds to aromatic carboxylic acids | |
| US2992271A (en) | Catalytic oxidation of aralkyl compounds | |
| GB1063451A (en) | Aromatic acids | |
| US3790624A (en) | Oxidation of alkyl-substituted aromatic compounds | |
| US3644506A (en) | Preparation of aromatic carboxylic acids | |
| US3890374A (en) | Method for the preparation of monomethyl terephthalate or a mixture thereof with p-toluic acid | |
| US3075009A (en) | Oxidation of alkylbenzene carboxylic acids | |
| US4016206A (en) | Process for preparing pyromellitic acid | |
| US2764611A (en) | Process for production of aromatic polycarboxylic acids |