(320ah) Characterization Method of Micro-Gel Particles within Synthetic Resin Adsorbent
Now, it is demanded to work on environmental preservation and avoidance of exhaustion of resources. For resolutions of these problems, it is noticed biorefinaly, which means producing various fuels and utility substances systematically as materials which is biomass produced a process of elementary cycle in the natural world. So, in this study it is aimed saccharides which are produced largely in the biomass. In the saccharides, development of methods for using D-Glucose or D-Fructose which is an isomer of D-Glucose, which composes cellulose, starch and so on, is an important subject. A reaction of D-Fructose in hydrochloric acid has been known from the old days. It is necessary to derive purposive products selectively for obtaining ones. Conventionally, these kinds of complex reactions have been controlled by temperature, time, pressure, solvent(s) and catalyst(s). But it is difficult to obtain specific compounds selectively by complicated reactions of saccharides. So, as a new control method of these reactions, to obtain purposive products selectively and efficiently by being adsorbed specific compounds onto an adsorbent from many products which are concerned with the reaction was tried. It was found that when d-Fructose was decomposed by concentrated hydrochloric acid, a primary product was 5-hydroxymethyl-furfural (HMF). Experimental procedures to obtain HMF and/or HMF dimer were studied and then it was reported that HMF dimer could be obtained from the mixture of HMFs by use of selective adsorption technique onto synthetic resin adsorbent. But some amounts of molecules adsorbed within synthetic resin particles are not desorbed by a solvent extraction technique. The amount called ?amount adsorbed irreversibly? after here. In the case when so-called ?amount adsorbed irreversibly? is very larger, adsorption efficiency might be getting down. It has been concluded with respect to styrene-divinylbenzene adsorbent that amount adsorbed irreversibly is a function of crosslinking degree but significant relationship between the amount and the degree was not obtained. Then, new physical property has to be employed for determination of suitable adsorbent particles. As mentioned in previous paper, amount adsorbed irreversibly seems to be due to sorption within micro-gel particles. In this paper, characteristic and determination procedure of the micro particles is focused on. Vaporization technique was employed as the determination procedure of the characteristic. As the results, the thus-obtained characteristic space volume within the micro particles of styrene-divinylbenzene adsorbent was found out of be a function of crosslinking degree. The details will be presented at the conference.
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