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Перевод: zeolite

[существительное]
цеолит

Тезаурус:

1. Specialist capabilities for polymer, zeolite, catalyst, ceramic, semiconductor, metal/alloy and molecular materials are provided with simulation of X-ray, neutron and electron diffraction and High-Resolution Transmission Electron Microscope images possible for these materials.
2. This preference is said to arise "because the zeolite cage is too small to admit larger ions and too large to bind smaller ones strongly."
3. The author then surveys the current state of the art of zeolite synthesis and transformation, and shows how it is possible to ring the changes among the component atoms of zeolites - the silicon and oxygen parts of the polymeric framework and the counterbalancing metal ions can all be changed for other elements while still preserving the topology that is the characteristic feature of a zeolite.
4. The true basis of the cation selectivity of zeolites is not completely understood but can usually be explained in terms of the specific molecular architecture of the zeolite frameworks (always large enough to accommodate caesium), the relative amount of silicon and aluminium in the zeolite framework, and the hydration state of the cations.
5. The zeolite is used for solvent recovery and waste gas purification.
6. Degussa has announced the development of a new hydrophobic molecular sieve, Wessalith DAY, from a Y zeolite dealuminated using a Degussa procedure.
7. This remarkable transformation is believed to occur because this zeolite has highly acidic surfaces; they create carbonications from the methanol that polymerise.
8. It is true that removal of radiocaesium by clinoptilolite seems to be less effective than by bentonite or a hexacyanoferrate II but this may well be because a zeolitised tuff has been used (40-;60 per cent zeolite content), or that the clinoptilolite used is potassium rich.
9. It would be difficult to construct a more misleading description of zeolite ion-exchange selectivity!
10. This novel method of synthesising the compound could perhaps be used more widely if the compound were dispersed - eg within a zeolite - where there are channels for the rapid movement of the reactive plasma species.
11. Mobil in the US has made an aluminosilicate zeolite mineral called ZSM-5 which converts methanol almost effortlessly into high octane petrol.