摘要:

AbstractDispersion in a liquid two‐phase system. The principal parameter of interest in the reliable design of stirred reactors for systems of two immiscible liquids (extractors, polymerization reactors) is the interfacial area between the two liquids. However, a knowledge of further operating parameters, such as the minimum number of revolutions per unit time for complete dispersion, rotational speed for phase inversion, and the scale‐up behaviour, is very important. Results published so far on these questions are surve

ISSN:0009-286X    

DOI:10.1002/cite.330520802

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractCatalytic properties of silicic acids and metal oxides prepared hydrolytically at high temperatures. The physical and chemical properties of silicic acids and metal oxides (Al2O3and TiO2P25) prepared hydrolytically at high temperatures are described, insofar as they might be of interest to catalyst producers. A highly topical literature survey reveals areas of interest in the fields of research and practical applications. The experimental section deals with the preparation of catalyst supports made of highly dispersed silica gel products. Their characteristics are tabulated.

ISSN:0009-286X    

DOI:10.1002/cite.330520803

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractSafety aspects in the planning and construction of chemical plants. Pre‐requisites for the construction of a “safe plant” are reliable documentation, practicable laws and regulations, and systematic working by experienced specialists during the planning and implementation stages of a project. During the phase when the concept is being established, comprehensive data must be available on all the materials and their reactions. Already at this stage, safety aspects of importance under a wide range of operating conditions are taken into account by all the specialists in close collaboration. During the detailed planning and project implementation stages, safety criteria for individual components are drawn up and compiled. During the final safety discussions, all aspects relating to safety are systematically checked. During the construction and assembly phases, the execution of the safety concept established is supervised at a wide variety of different stages during internal and external inspec

ISSN:0009-286X    

DOI:10.1002/cite.330520804

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330520805

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractAcceptance testing and surveillance of plant. Existing legislation require acceptance testing of the principal components of a chemical plant prior to its commissioning. As shown for a pressure vessel, this testing of a large chemical plant can only be performed effectively if the necessary concepts have been developed and the data required have been collected during the planning and construction stage. It is not sufficent to consider the components individually. Their incorporation into the plant and their mutal interaction are just as important. Acceptance testing must be preceded by a consideration of the overall safety of the plant. This does not require any new regulations. Regular surveillance ensures that the established safety level is maintained. Many surveillance measures are already stipulated during acceptance testing.

ISSN:0009-286X    

DOI:10.1002/cite.330520806

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractAeration of relatively viscous liquids. The article considers the flooding point and stirrer performance, as well as mass transfer in agitator vessels and bubble columns, in relatively viscous (aqueous glucose and glycerol solutions as well as millet broth) and non‐Newtonian liquids (aqueous CMC and PAA solutions). Numerous experimental results published in the available literature and several obtained by the author provide a basis for these considerations. All the experimental results are presented in the framework of similarity theory. Thus it also proves possible to present thekLavalues in sorption characteristics. In order to achieve this aim, a representative viscosity is introduced for non‐Newtonian liquids, both in agitator vessels and in bubble columns. The comprehensive and comparative account reflects the current state of the art. Design data and dimensioning criteria are given for certain systems and working ranges. Comparison between agitator vessels and bubble columns on the basis of the design data derived permits predictions to be made regarding the suitability of various articles of equipment. Some of the results have already been reported

ISSN:0009-286X    

DOI:10.1002/cite.330520807

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330520808

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330520809

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330520810

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330520811

出版商:WILEY‐VCH Verlag    

年代:1980

数据来源: WILEY