Quaternary ammonium salts and their preparation
US4482713A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D295/088
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel quaternary ammonium salts of the general formula EQU [R.sup.1 R.sup.2 R.sup.3 N(A--O).sub.n --R.sup.4 ].sup.+ Z.sup.- where R.sup.1 and R.sup.2 are identical or different and each is alkyl, aryl, aralkyl, alkylaryl, alkoxyalkyl, or a (poly)alkylene glycol radical, or R.sup.1 and R.sup.2, together with the nitrogen atom, are a heterocyclic ring, or one or more substituents R.sup.1 or R.sup.2 are polyfunctional so that the salt contains not less than 2 ammonium groups, R.sup.3 and R.sup.4 are identical or different monovalent radicals of one or more alkylating agents R.sup.3 X or R.sup.4 X, for example an (ar)alk(en)yl halide, sulfate or methosulfate or an (alkyl)aryl-sulfonate or -sulfonic acid ester, A is alkylene of 2 to 10 carbon atoms, n is an integer and Z is either X or another salt-forming anion or a hydroxyl ion, are prepared by N-alkylation and O-alkylation of an alkanolamine with the aid of a phase transfer catalyst and are useful as cationic surfactants, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.