Process for the preparation of boric oxide by hydrolysis of methyl borate and its use in the oxidation of alcohol-saturated hydrocarbons
US5235117A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
For preparing at least one boric oxide in an anhydrous or hydrated form and of general formula B.sub.2 O.sub.3, xH.sub.2 O, in which x is a number from 0 to 3, a methyl borate hydrolyzate comprising boric oxide and methanol is introduced into a distillation column is introduced the product from, at least one compound (preferably a hydrocarbon such as, e.g., 2,3-dimethyl butane or 2-methyl pentane) forming a heteroazeotrope with methanol, said heteroazaeotrope having a boiling point below that of the azeotrope formed by methyl borate with methanol and at least one compound having a boiling point higher than that of methyl borate, said compound not forming an azeotrope with a boiling point below that of said heteroazeotrope and then at the head of the column said heteroazeotrope is recovered and at the bottom of the column a suspension containing at least one boric oxide. A description is also given of a process for the oxidation of at least one saturated hydrocarbon into a product incorporating the corresponding alcohol wherein oxidation is carried out with oxygen in the presence of a boric oxide with. The oxidation product is hydrolyzed into orthoboric acid and alcohol, which is re…
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