ISSN:0009-286X    

DOI:10.1002/cite.330591002

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

摘要:

AbstractWelding quality assurance in plant construction illustrated by examples from practice. The welding quality assurance concept of a chemical company is shown by way of practical examples. In particular, the importance of quality monitoring by the owner operator is stressed. This must be carried out conscientiously because, in present‐day chemical plant construction, availability plays an important economic role, and also because safety is given the very highest priorit

ISSN:0009-286X    

DOI:10.1002/cite.330591003

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

摘要:

AbstractComparison of safety regulations for chemical plant in Europe. The purpose of this review is to demonstrate the status of the safety of chemical plant in selected Western countries. It is shown what demands on the safety of chemical plant have to be fulfilled, how these demands are transformed into practice, and how their fulfillment is monitored. The starting point is a short overview of the technical requirements in the Federal Republic of Germany and the associated system of approval and monitoring of chemical plant. The corresponding systems in various other European countries are then briefly described. Thus a survey is presented of the measures required for chemical plant safety in Europe, and in particular of the stipulations for operating approval and surveillance.

ISSN:0009-286X    

DOI:10.1002/cite.330591004

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

摘要:

AbstractReducing the cadmium content of crude phosphates and mineral fertilizers. Crude sedimentary phosphates generally contain cadmium together with traces of other heavy metals. These Cd traces generally end up in fertilizers produced from the crude phosphates. Processes have therefore been developed to separate the Cd from the crude phosphate or from the crude phosphoric acids arising therefrom as intermediates. In this way, the Cd content of the crude phosphate can be reduced to less the 10% of its original value, and to 50% thereof by extractive treatment with acidic calcium nitrate solution. Older calcination processes for crude phosphate have been improved to give residual Cd contents of 10 to 50% at temperatures of 800 to 1000°C. Cadmium can be removed almost quantitatively from crude phosphate by means of dialkyl dithiophosphoric acid esters by extraction, binding to adsorbents, or ion flotation. Cadmium can be extracted from crude acids in high yield by long‐chained amines. After partial neutralization of the crude acids, precipitation as cadmium sulphide is also possib

ISSN:0009-286X    

DOI:10.1002/cite.330591005

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

摘要:

AbstractCompacting granulation in roller presses. The application and handling, as well as storage and transport, of a bulk solid depend not only on its material properties but to a considerable degree upon its properties of state, such as the fineness of a solid. In cases where the excessively fine division of a solid has detrimental effects, recourse can be taken to increasing the particle size. Among the methods of granulation developed for this purpose in recent years, that of compacting granulation has prooved to be especially well suited. The heart of a compacting granulation system is the compacting process performed by roller presses. This review therefore critically examines the parameters influencing product quality, throughput, and energy consumption. Typical applications are presented to illustrate compacting granulation systems.

ISSN:0009-286X    

DOI:10.1002/cite.330591006

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330591007

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330591008

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330591009

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330591010

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330591011

出版商:WILEY‐VCH Verlag    

年代:1987

数据来源: WILEY