Study on pervaporation dehydration of multi-component system using combined membranes;

By analyzing and characterizing the deactivated catalyst,it was found that the contaminations of the dimerization-etherification catalyst from metal cations and basic nitrates were the main factor of the catalyst deactivation.

This route is carried out in two steps; selective dimerization of isobutene (from C4 steams) to form di-isobutene, and hydrogenation to form saturated product isooctane.

The olefin-reducing performance of the developed catalyst is investigated on a continuous-flow fixed-bed reactor with FCC naphtha as feedstock, and the impact of process conditions on olefin reduction by polymerization is studied.

This paper presents a combined technology for mixed C 4 olefin polymerization via prereactor and catalytic distillation reactor.

An analysis of the imaging of two concave spherical reflecting mirrors in superposition;

No matter what kinds of methods are used to search the best superposition of two molecules like grid-based integral or efficient iterative technique, selecting the relative situations of molecules is needed.

Net ameliorates the traditional polynomials image registration method, puts forward a new method using orthogonal polynomials, expatiates the principle, arithmetic of this technique, and then realizes the clipping registration and superposition of vectorgraph and remote-sensing image.