Preparation of aconitic acid
US4123459A · kind A · utility
8Cited by
0References
6Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 22, 1975 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Dec 22, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D307/33
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel methods for preparing polycarboxylic compounds which are useful as metal sequestrants and food acidulants are disclosed. These compounds are aconitic and a mixture of aconitic acid, and the lactones of isocitric acid and alloisocitric acid. The compounds can be neutralized to the corresponding salts which, in turn, are metal sequestering agents. The novel methods include chlorination of propane-1,1,2,3-tetracarboxyalic tetraesters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.