摘要:

Maleic anhydride (MA) is an important intermediate in a large number of chemtcal processes. World capacity is of the order of 700,000 tonnes/yr, and its major use is in the manufacture of unstaurated polyester resins, which accounts for 60–70% of production [1,2]. Other uses are summarized in Table 1

ISSN:0161-4940    

DOI:10.1080/01614948508064740

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Chemisorption of small molecules is often used as a probe for By probing the surface properties of transition metal oxides. the interaction of molecules with the surface, information is often obtained on the oxidation state, the coordination symmetry, the degree of coordination unsaturation of the surface cations, the acid-base properties of the surface hydroxyl groups, and the presence and the nature of surface Lewis acid and B rosnsted acid sites. This information is deduced from experimental measurements of the adsorption isotherms, the heats of adsorption, the thermal desorption spectra, and the vibrational spectra of the adsorbate. Until recently, when high resolution electron energy loss spectroscopy became available, vibrational spectra were obtained with infrared spectroscopy. Laser Raman spectroscopy has seldom been used because of the low Raman scattering cross section of most molecules.

ISSN:0161-4940    

DOI:10.1080/01614948508064741

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The discovery of the striking catalytic properties of the Mobil zeolite ZSM-5 has been followed by a large and intensive research effort both in catalysis promoted by ZSM-5 and in the synthesis and properties of other highly siliceous zeolites. While the distinctions between ZSM-5 and some of the claimed new zeolites are barely perceptible (it would perhaps be invidious to name these zeolites), other new. highly-siliceous zeolites differ markedly from ZSM-5/ZSM-11 in structure and consequently in other properties as well. Zeolites Nu-1 and FU-1 have now been fairly well characterized in both physical and catalytic properties. Although their crystal structures have not yet been determined, it is clear that they are different from ZSM-5 (and indeed, any other published zeolite structure).

ISSN:0161-4940    

DOI:10.1080/01614948508064742

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0161-4940    

DOI:10.1080/01614948508064739

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor