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US 2012/0237650 A1Published application
Stabilization of diesters of dicarbonic acid
AssigneeLANXESS Deutschland GmbH
InventorsSteffen Kahlert, Johannes Kaulen, Erasmus Vogl
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Abstract
By using phosphorus compounds, diesters of dicarbonic acid may be stabilized against thermal and chemical decomposition over a relatively long period. Mixtures of diesters of dicarbonic acid and phosphorus compounds are outstandingly suitable for preserving foods.
Claims16
A process for the stabilization of a diester of dicarbonic acid against chemical and thermal breakdown, comprising:
- contacting the diester of dicarbonic acid with one or more phosphorus containing compounds.
A mixture comprising:
- a diester of dicarbonic acid of the general formula (I)
- where
- R1 and R2 independently of one another are straight-chain or branched C1-C8-alkyl, cycloalkyl, C2-C8-alkenyl, C2-C8-alkynyl or benzyl, each of which is optionally monosubstituted to polysubstituted, identically or differently by halogen;
- nitro;
- cyano;
- C1-C6-alkoxy;
- or dialkylamino;
- and/or are phenyl which is optionally monosubstituted to polysubstituted, identically or differently by halogen;
- nitro;
- cyano;
- alkyl;
- haloalkyl;
- alkoxy;
- haloalkoxy;
- acyl;
- acyloxy;
- alkoxycarbonyl;
- or carboxyl,
- and one or more phosphorus compounds being present in an amount of 0.01 to 100,000 ppm, based on the diester of dicarbonic acid.
16 more elements
Dependencies are inferred from the claim text.