Process for the control of pH in the ethynylation of formaldehyde
US4294997A · kind A · utility
1Cited by
2References
14Claims
0Family size
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Key dates
| Filing date | Jul 10, 1978 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Jul 10, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C33/046
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the ethynylation of formaldehyde in the presence of a copper acetylide catalyst to produce butynediol, pH is controlled by the incremental or continuous addition of an alkali metal hydroxide and an alkali metal carbonate at an equivalent ratio of hydroxide ion to carbonate ion of 1:1-4:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.