GB1013617A - Improved process for recovery of adipic acid precursors - Google Patents
Improved process for recovery of adipic acid precursorsInfo
- Publication number
- GB1013617A GB1013617A GB36395/63A GB3639563A GB1013617A GB 1013617 A GB1013617 A GB 1013617A GB 36395/63 A GB36395/63 A GB 36395/63A GB 3639563 A GB3639563 A GB 3639563A GB 1013617 A GB1013617 A GB 1013617A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vessel
- cyclohexane
- passes
- pipe
- adipic acid
- 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
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
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/313—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with molecular oxygen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/48—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by oxidation reactions with formation of hydroxy groups
- C07C29/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by oxidation reactions with formation of hydroxy groups with molecular oxygen only
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
-
- 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
- C07C51/31—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting
- C07C51/316—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation of cyclic compounds with ring-splitting with oxides of nitrogen or nitrogen-containing mineral acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
<PICT:1013617/C2/1> In the manufacture of adipic acid by oxidizing cyclohexane with molecular oxygen in the liquid phase and further oxidizing the primary oxidation products so obtained, the primary oxidation products are mixed with water and then separated into an organic phase and an aqueous phase before they are further treated to produce a product suitable for further oxidation to adipic acid. The further oxidation is preferably effected in two stages with nitric acid. As shown, cyclohexane is oxidized in a vessel 2 with air supplied through a pipe 3, and the oxidation products are treated with water fed through a pipe 4. The mixture is separated in a decanter 6 into an organic layer and an aqueous layer, which pass to vessels 7, 8, respectively. The organic layer passes to a drystripper 10 from which unoxidized cyclohexane is passed back to the vessel 2 by pipe 13. The distillation residue from the dry stripper 10 passes to a wet stripper 18 to which water is supplied from a concentrator 35 (see below), and the distillate from the wet stripper is separated in decanter 14 into cyclohexane, which is returned to the vessel 2, and an aqueous layer which is sent to waste, wholly or in part, through pipe 15. The distillation residue from the wet stripper passes to the adipic acid precursor storage vessel 25 either directly or by way of a refiner 22 in which a final distillation is effected and from which the distillation products pass via a decanter 12 to the vessel 25. The aqueous portion of the cyclohexane oxidation product collected in the vessel 8 passes to a concentrator 35, the distillate from which is fed to the wet stripper 18 (see above). The residue from the concentrator 35 passes to a crystallizer 27, from which the crystals pass to a filter 30, the filter cake being transferred to the vessel 25. Comparative experimental results are given. Specifications 1,013,618 and 1,013,619 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US22444362A | 1962-09-18 | 1962-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1013617A true GB1013617A (en) | 1965-12-15 |
Family
ID=22840703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36395/63A Expired GB1013617A (en) | 1962-09-18 | 1963-09-16 | Improved process for recovery of adipic acid precursors |
Country Status (9)
Country | Link |
---|---|
BE (1) | BE637536A (en) |
CH (1) | CH435236A (en) |
DE (1) | DE1468282A1 (en) |
DK (1) | DK115251B (en) |
GB (1) | GB1013617A (en) |
LU (1) | LU44453A1 (en) |
NL (1) | NL298068A (en) |
NO (1) | NO116849B (en) |
SE (1) | SE312545B (en) |
-
0
- BE BE637536D patent/BE637536A/xx unknown
- NL NL298068D patent/NL298068A/xx unknown
-
1963
- 1963-09-16 GB GB36395/63A patent/GB1013617A/en not_active Expired
- 1963-09-17 SE SE10171/63A patent/SE312545B/xx unknown
- 1963-09-17 CH CH1147163A patent/CH435236A/en unknown
- 1963-09-17 DE DE19631468282 patent/DE1468282A1/en active Pending
- 1963-09-17 LU LU44453D patent/LU44453A1/xx unknown
- 1963-09-17 NO NO150127A patent/NO116849B/no unknown
- 1963-09-18 DK DK438563AA patent/DK115251B/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE1468282A1 (en) | 1969-01-02 |
DK115251B (en) | 1969-09-22 |
NL298068A (en) | |
SE312545B (en) | 1969-07-21 |
NO116849B (en) | 1969-06-02 |
BE637536A (en) | |
CH435236A (en) | 1967-05-15 |
LU44453A1 (en) | 1964-03-17 |
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