Process for the production of hydroxy-pivaldehyde
US4036888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Oct 23, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/82
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of hydroxy-pivaldehyde which comprises reacting formaldehyde with isobutyraldehyde in an approximate molar ratio of 1:2 in the presence of a catalytic amount of triethylamine, to produce a reaction mixture containing 42 to 50 wt% of hydroxy-pivaldehyde, 28 to 35 wt% of isubutyraldehyde, approximately 18 wt% of water, approximately 2 wt% of triethylamine, and approximately 18 wt% of secondary reaction products, and recovering hydroxy-pivaldehyde therefrom. The recovery steps include adding at least one part by weight of water to 1 part of the solution, distilling the solution obtained under reduced pressure at a temperature below 65.degree. C, to produce a distillate containing isobutyraldehyde, triethylamine and water, and an aqueous solution containing hydroxy-pivaldehyde, cooling the aqueous solution containing hydroxy-pivaldehyde, cooling the aqueous solution containing hydroxy-pivaldehyde to approximately 15.degree. to 20.degree. C to cause the crystallization of hydroxy-pivaldehyde, filtering off the crystals obtained, washing the crystals with cold water and then drying the crystals in air, and subjecting the mother liquors from the crystallizatio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.