GB691641A - Improvements in or relating to the production of poly-carboxylic acids - Google Patents
Improvements in or relating to the production of poly-carboxylic acidsInfo
- Publication number
- GB691641A GB691641A GB6845/51A GB684551A GB691641A GB 691641 A GB691641 A GB 691641A GB 6845/51 A GB6845/51 A GB 6845/51A GB 684551 A GB684551 A GB 684551A GB 691641 A GB691641 A GB 691641A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- polycarboxylic acids
- oxidized
- oxidation
- suspension
- 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
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/72—Sulfites
-
- 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
- C07C51/27—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with oxides of nitrogen or nitrogen-containing mineral acids
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Polycarboxylic acids (principally mellitic acid) are manufactured by the oxidation of natural or artificial materials rich in carbon, by passing nitric acid into a suspension of the carbonaceous material in sulphuric acid and heating the mixture to 130-230 DEG C. The nitric acid may be in liquid or vapour form, and in the latter case is advantageously mixed with a carrier gas, preferably an oxygen-containing gas such as air. The polycarboxylic acids may be isolated by filtering the hot reaction mixture to remove inorganic by-products, and crystallizing the acids by cooling the filtrate. In examples: (1) nitric acid (sp. gr. 1.4) is led into a suspension of coke breeze in 96 per cent sulphuric acid at 195-205 DEG C.; (2) the oxidation in (1) is effected at 170 DEG C.; (3) flotation fusain is oxidized as in (2); (4) coke from mineral oil products is oxidized as in (1) except that the concentration of the sulphuric acid is 90 per cent and the temperature 215 DEG C.; (5) pitch coke is oxidized as in (4).ALSO:Acid aluminium sulphate is obtained as a by-product in the manufacture of polycarboxylic acids by the oxidation of natural or artificial materials rich in carbon by passing nitric acid into a suspension of the carbonaceous material in sulphuric acid and heating the mixture to 130-230 DEG C. After separating the inorganic residue from the hot solution of the polycarboxylic acids by filtration, the acid aluminium sulphate, together with traces of other sulphates, may be extracted with water, and any residual silicic acid removed by filtration. In an example, coke breeze is employed as starting material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL296659X | 1950-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB691641A true GB691641A (en) | 1953-05-20 |
Family
ID=19783006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6845/51A Expired GB691641A (en) | 1950-03-28 | 1951-03-22 | Improvements in or relating to the production of poly-carboxylic acids |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2673216A (en) |
| CH (1) | CH296659A (en) |
| DE (1) | DE873542C (en) |
| GB (1) | GB691641A (en) |
| NL (1) | NL69391C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2819300A (en) * | 1950-09-09 | 1958-01-07 | Grosskinsky Otto | Process of producing and purifying benzene carboxylic acid |
| DE954239C (en) * | 1953-03-06 | 1956-12-13 | Bergwerksverband Zur Verwertun | Process for the preparation of carbonic acid mixtures |
| NL196775A (en) * | 1954-08-12 | |||
| US2929838A (en) * | 1957-09-19 | 1960-03-22 | Dow Chemical Co | Halogenated coal acids |
| US3325507A (en) * | 1963-11-27 | 1967-06-13 | Merck & Co Inc | Process for the preparation of 5-nitroimidazole-2-carboxylic acids |
| US3624004A (en) * | 1968-02-16 | 1971-11-30 | Standard Oil Co | Process for the production of active carbons |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR879182A (en) * | 1943-02-23 | |||
| GB190724662A (en) * | 1907-11-07 | 1908-01-02 | Read Holliday & Sons Ltd | Improvements in the Manufacture of Mellitic Acid. |
| US1356137A (en) * | 1914-12-30 | 1920-10-19 | Chemical Foundation Inc | Process of preparation of oxalic acid |
| DE441432C (en) * | 1920-09-14 | 1927-03-04 | I G Farbenindustrie Akt Ges | Process for the preparation of organic acids |
| US2176348A (en) * | 1937-04-05 | 1939-10-17 | Carnegie Inst Of Technology | Manufacture of mellitic acid |
| US2193337A (en) * | 1938-02-23 | 1940-03-12 | Ici Ltd | Catalytic oxidation of carboniferous materials |
| DE747167C (en) * | 1941-02-26 | 1945-01-13 | Bernhard Juettner Dipl Ing | Process for the production of nitrogenous fertilizers from fossil or recent plant bodies |
| DE749974C (en) * | 1942-09-23 | 1944-12-12 | Process for the preparation of benzene polycarboxylic acids | |
| US2461740A (en) * | 1947-10-02 | 1949-02-15 | Carnegie Inst Of Technology | Process of making organic acids from carbonaceous material |
| GB652935A (en) * | 1948-06-29 | 1951-05-02 | Carnegie Inst | Improvements in or relating to process for making organic acids from carbonaceous material |
-
0
- NL NL69391D patent/NL69391C/xx active
-
1951
- 1951-03-21 US US216840A patent/US2673216A/en not_active Expired - Lifetime
- 1951-03-22 GB GB6845/51A patent/GB691641A/en not_active Expired
- 1951-03-25 DE DEN3675A patent/DE873542C/en not_active Expired
- 1951-03-27 CH CH296659D patent/CH296659A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE873542C (en) | 1953-04-16 |
| US2673216A (en) | 1954-03-23 |
| NL69391C (en) | |
| CH296659A (en) | 1954-02-28 |
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