Imperial Chemical Industries Limited

Other

David A Jackson

Peter A Gemmell

Roy John Sampson

Michael A Day

Beverley T Meggitt

Pedram A Leilabady

Optical fiber measuring systems using an interferometer are disclosed. The measuring range of the system are extended by the use two wavelengths of radiation during the measurement. The phases of the light at each wavelength may be compared, or the radiation of one wavelength may be used to calibrate the radiation of the other wavelength.

Optical fibre measuring system

A compound having ferroelectric liquid crystal properties of the formula: ##STR1## wherein A is the residue of a liquid crystal material or a liquid crystal compatible material;

Liquid crystal material

Hydrocarbon hydroconversion, especially hydrocarbon reforming, using catalysts whose supports have been prepared by a sol-gel process. For hydrocarbon reforming, it is preferred that the primary particles used to prepare the porous gel should have been prepared by a vapor phase condensation method, for example flame hydrolysis and that the support should have a narrow pore size distribution. The process produces much less gas by hydrocracking at given aromatics yields than comparative processes using conventional catalysts.

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Radcliffe, United Kingdom

David A Jackson