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
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)
Description
ft (9 DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for '30 cents per sheet.
Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED APRIL 15, 1969 707 405 PREPARATION OF PHTl'iIALIC ACIDS BY SLOW OXIDATION Frederic B. Kirby, 13 Council Trail, Indian Field, Del. 19703 Filed Feb. 23, 1968. Published Apr. 15, 1969 Class 260-524 No Drawing. 13 Pages Specification 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. 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.
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/en not_active Withdrawn
- 1969-02-21 BE BE728749D patent/BE728749A/xx unknown
- 1969-02-21 NL NL6902768A patent/NL6902768A/xx unknown
- 1969-02-21 DE DE19691908787 patent/DE1908787A1/en active Pending
- 1969-02-24 GB GB9792/69A patent/GB1188928A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2002471A1 (en) | 1969-10-17 |
| GB1188928A (en) | 1970-04-22 |
| BE728749A (en) | 1969-08-01 |
| DE1908787A1 (en) | 1969-09-25 |
| NL6902768A (en) | 1969-08-26 |
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