40results about How to "Fine pore size" patented technology

The invention relates to compositions that can be used to adsorb low concentration, preferably, for example less than 15 ppm, of unwanted or target substances. Typically the absorbance can be from an enclosed vapor phase. Such absorbency is accomplished in a contained substantially enclosed gaseous volume or atmosphere using a composition comprising a cyclodextrin compound and a polyethylenimine that can have an absorbency capability for low concentrations of unwanted or target substances. Such absorbency can be obtained with thermoplastic materials used in the form of bulk polymer or a film, fiber, web, woven fabric, nonwoven fabric, sheet, packaging and other such structures including or surrounding the enclosed volume. The adsorbent of the invention is typically used in the context of an enclosed volume, also known as an enclosed ambient vapor phase that contains the adsorbent of the invention and the unwanted or target substances at a concentration that is not desirable. The concentration should be reduced to non-offensive sensed limits or a limit that does not produce a biological response.

Electroosmotic flow systems containing two or more electroosmotic flow elements which meet at a junction, at least one of the electroosmotic flow elements having a substantial charge ratio. The electroosmotic flow elements have matching flux ratios. The electroosmotic flow elements may contain porous materials whose terminal portions are shaped to increase the surface area exposed to the fluid at the junction. Examples of such terminals are illustrated in the figure.

The invention discloses bio-based aromatic hydrocarbon polyester polyol for controlled-release fertilizer. The bio-based aromatic hydrocarbon polyester polyol is characterized by being synthesized according to a method comprising the following steps: sucking fatty acid (1mol), diethylene glycol (2mol), glycerol (2mol) and the like into a reaction kettle in vacuum according to a sequence; adding terephthalic acid (3mol), phthalic anhydride (2mol) and trimethylol propane (2mol) from a solid feeding hole in the reaction kettle; after stirring in the reaction kettle for 1h, displacing air in the reaction kettle once with nitrogen gas; slowly raising the temperature of the reaction kettle to 180 DEG C to 240 DEG C, carrying out esterification reaction to distill water and maintaining the temperature for 4h; when the temperature of the top of an esterification tower is lower than about 95 DEG C and no water is discharged, sampling and testing an acid value; when the acid value is less than 15mgKOH / g, supplementing a catalyst Tio2 / SO4-2 solid super acid which accounts for 0.03 percent of the total amount; continually keeping heat and reacting for 1h; then carrying out vacuum extraction for about 2h and controlling the vacuum degree to be -0.085mPa to -0.095mPa; when the acid value is less than 2mgKOH / g, the reaction is completed; then cooling and filtering and packaging to obtain a bio-based aromatic hydrocarbon polyester polyol finished product.