Overbasing chemical process
US4206062A · kind A · utility
9Cited by
2References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Jun 5, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2219/046
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A process for making an overbased low-soap alkaline earth metal hydrocarbylsulfonate in a single stage by mixing in an inert diluent (a) a hydrocarbyl sulfonic acid of 400-1500 molecular weight, (b) alkaline earth metal oxide or hydroxide in an amount to provide a stoichiometric excess equivalent to a total base number of at least 200 and to provide a "metal ratio" of at least 0.02.times.mol wt of the sulfonic acid, (c) an alkanol of 1-4 carbon atoms, preferably methanol, (d) water and (e) ammonium formate and then passing carbon dioxide into the mixture to convert excess alkaline earth metal base to carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.