GB850960A - Recovery of monocarboxylic acids - Google Patents
Recovery of monocarboxylic acidsInfo
- Publication number
- GB850960A GB850960A GB1082058A GB1082058A GB850960A GB 850960 A GB850960 A GB 850960A GB 1082058 A GB1082058 A GB 1082058A GB 1082058 A GB1082058 A GB 1082058A GB 850960 A GB850960 A GB 850960A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bromine
- added
- compound
- mixtures
- catalyst
- 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
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Mono-carboxylic acids are recovered from mixtures thereof with bromine or bromine-containing substances, particularly hydrogen bromide, by distilling the mixtures in the presence of a metal compound or compounds which inhibit the volatilisation of the bromine or bromine-containing substances. If the mixture is obtained in an oxidation process, e.g. that described in Specification 807,091, the metallic compound can be added as the catalyst for the oxidation reaction, or may be added in addition to the catalyst ; otherwise the compound is added after the mixture has been obtained. Oxides, hydroxides, and salts of acids other than strong mineral acids, e.g. carbonates, acetates, propionates and benzoates, of sodium, potassium, calcium, barium, nickel, zinc, silver, lead, iron, aluminium, cobalt and manganese, are specified. Sufficient metal compound or compounds are added to ensure a stoichiometric ratio of metal to bromine greater than 1 : 1, preferably between 2 : 1 and 3 : 1. In Examples there is described the recovery of acetic acid and propionic acid from mother liquors obtained by bromide controlled air oxidation of para-xylene to terephthalic acid.ALSO:Mono-carboxylic acids are recovered from mixtures thereof with bromine or bromine-containing substances, particularly hydrogen bromide, by distilling the mixtures in the presence of a metal compound or compounds which inhibit the volatilisation of the bromine or bromine-containing substances. If the mixture is obtained in an oxidation process, e.g. that described in Specification 807,091 (see Group IV(b)), the metallic compound can be added as the catalyst for the oxidation reaction, or may be added in addition to the catalyst; otherwise, the compound is added after the mixture has been obtained. Oxides, hydroxides, and salts of acids other than strong mineral acids, e.g. carbonates, acetates, propionates and benzoates, of sodium, potassium, calcium, barium, nickel, zinc, silver, lead, iron, aluminium, cobalt and manganese, are specified. Sufficient metal compound or compounds are added to ensure a stoichiometric ratio of metal to bromine greater than 1:1, preferably between 2:1 and 3:1. In examples there is described the recovery of acetic acid and propionic acid from mother liquors obtained by bromide-controlled air oxidation of paraxylene to terephthalic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1082058A GB850960A (en) | 1958-04-03 | 1958-04-03 | Recovery of monocarboxylic acids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1082058A GB850960A (en) | 1958-04-03 | 1958-04-03 | Recovery of monocarboxylic acids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB850960A true GB850960A (en) | 1960-10-12 |
Family
ID=9974900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1082058A Expired GB850960A (en) | 1958-04-03 | 1958-04-03 | Recovery of monocarboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB850960A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883348A (en) * | 2015-01-19 | 2016-08-24 | 张传生 | Belt cleaning and lubricating device for carrier rollers below belt |
| CN111089638A (en) * | 2019-12-25 | 2020-05-01 | 李钢保 | Weighing carrier roller for belt scale |
-
1958
- 1958-04-03 GB GB1082058A patent/GB850960A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883348A (en) * | 2015-01-19 | 2016-08-24 | 张传生 | Belt cleaning and lubricating device for carrier rollers below belt |
| CN111089638A (en) * | 2019-12-25 | 2020-05-01 | 李钢保 | Weighing carrier roller for belt scale |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3772383A (en) | Process for preparing phenyl esters of aliphatic carboxylic acids | |
| US3084109A (en) | Recovery of monocarboxylic acids | |
| US3668239A (en) | Process for preparing glycol esters from olefinically unsaturated compounds | |
| GB1272820A (en) | Production of ethylene glycol esters and compounds derived thereform | |
| US3644486A (en) | Process for the manufacture of oxacylation products and optionally hydroxylation products of condensed aromatic compounds | |
| GB1340873A (en) | Carbonylation of olefins and acetylenes | |
| GB850960A (en) | Recovery of monocarboxylic acids | |
| US3346625A (en) | Oxidative carbonylation of olefins in the presence of a dehydrated aluminosilicate molecular sieve | |
| DE1593861B2 (en) | PROCESS FOR THE PREPARATION OF PHENYLESTERS FROM BENZENE | |
| GB1192646A (en) | Process for Working Up Aqueous Acetic Acid Containing Bromine | |
| GB1462749A (en) | Process for preparing carboxylic esters | |
| US4052442A (en) | Process for preparing glycol esters | |
| GB1215210A (en) | Preparation of unsaturated esters | |
| US2342463A (en) | Process for the manufacture of | |
| US2259895A (en) | Process for manufacture of aliphatic carboxylic acid anhydrides | |
| GB1345625A (en) | Process for producing acetic esters of butenediol | |
| US3760009A (en) | Hydroquinone process | |
| Giordano et al. | Electron-transfer processes: oxidation of arylacetic acids by peroxydisulphate in acetic acid | |
| GB1200392A (en) | Process for the manufacture of phenyl esters from benzene | |
| GB1266391A (en) | ||
| US3278590A (en) | Process for preparing unsaturated esters by oxidation of olefins in an aromatic amide solvent | |
| KR910015522A (en) | Method for preparing naphthalene dicarboxylic acid | |
| US3621054A (en) | Production of methacrylic acid | |
| GB1261407A (en) | An improved process for the conversion of acids to alcohols | |
| US2958701A (en) | Mono-decarboxylation of trimellitic acid anhydride |