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Quasi-elastic neutron-scattering (QENS) measurements have been made using the IRIS spectrometer (ISIS, UK) on water in synthetic Na zeolite P. The quasi-elastic broadening observed is assigned to a rotation of the water molecules.
A particulate detergent composition (especially with bulk density 700 g/l) containing an organic surfactant system, a zeolite P builder having a SiAl ratio 1.33 (zeolite MAP), and a bleach catalyst containing Mn and/or Fe ions and a ligand such as 1,4,7-trimethyl-1,4,7-triazacyclonane shows better resistance of the bleach catalyst against discoloration during storage than a similar composition...
The title compositions containing moisture-sensitive ingredients (especially sodium percarbonate and bleach catalysts such as manganese complexes) and zeolites show enhanced stability of the moisture-sensitive ingredients if the exchangeable cations of the zeolites include cations of a weak monoacidic base, for example, ammonium, Li, or H ions.
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