8 results about "Adsorption effect" patented technology

The invention provides a preparation method of polyacrylonitrile-based hollow carbon fibers. Lignin and polyacrylonitrile are dissolved in a solvent for defoaming at 25-80 DEG C, the obtained spinningsolution is sprayed into coagulation bath through a circular spinneret plate, hot-drawing is performed in pure water, hollow primary fibers are obtained, and the polyacrylonitrile-based hollow carbonfibers are obtained after water washing, drying, pre-oxidation and carbonization. The method has the advantages of having good separation and adsorption effect for medium and large molecules, good solvent resistance and long service life.

The invention discloses porous modified bentonite with foaming effect. The porous modified bentonite is characterized by being prepared from the following raw materials by weight: 85 to 90 parts of calcium bentonite, 1 to 2 parts of octadecyl trimethyl ammonium chloride, 1 to 2 parts of ammonium bicarbonate, 3 to 5 parts of activated carbon powder, 2 to 3 parts of sodium silicate, 0.8 to 1.3 parts of aminopropyltriethoxysilane, 2 to 2.5 parts of carboxymethyl cellulose, 5 to 7 parts of phenolic resin powder, 2 to 3 parts of crushed phoenix tree leaves and 3 to 4 parts of modified diatomite. According to the invention, a formula is reasonable; since bentonite is modified by adding foaming matters like ammonium bicarbonate and activated carbon powder and surfactants like octadecyl trimethyl ammonium chloride, the modified bentonite has porosity, so good adsorption effect is obtained; moreover, through good dispersion of the modified bentonite and the crushed phoenix tree leaves, the porous modified bentonite in the invention is porous and uniform in dispersion and is applicable as a water purification adsorbent, etc.

The invention specifically relates to a method for estimating in-vitro detoxification effect of a mycotoxin detoxification agent by using liquid chromatography, belonging to the technical field of biological detection. The method comprises the following steps: (1) early stage preparation: I, drafting of a standard curve of mycotoxin; II, preparation of a sample of the detoxification agent; and III, acquisition of a reaction medium; (2) detoxification: I, evaluation of in-vitro adsorption detoxification; and II, evaluation of simulated in-vivo adsorption detoxification; and (3) liquid chromatographic detection. The method for estimating in-vitro detoxification effect of the mycotoxin detoxification agent by using liquid chromatography can simulate gastrointestinal environments, adopts supernatant of chyme in the alimentary canal of an animal as a reaction medium, completely reproduce the gastrointestinal environment in the animal and more authentically evaluate the adsorption effect of an adsorbent.

The invention discloses a method for refining a high-temperature wood hydrolyzate. The method comprises the following steps: performing centrifugation on a raw material hydrolyzate; removing the water-soluble macromolecular lignin by a flocculation method; obtaining the hydrolyzate after flocculation, adsorbing the water-soluble small molecule lignin with the resin, and obtaining a purified xylosesolution; removing residual lignin of the purified xylose solution by a filtering device to obtain refined xylose liquid and prepare xylose; and eluting the resin-adsorbed lignin with an eluting solvent, and recovering the eluting solvent and lignin. The recovered ethanol of the invention can be recycled and reused; an integrated vortex reactor is also used to effectively improve and increase theflocculation effect, and the ion exchange resin as an adsorbent has a good adsorption effect on the charged lignin. The hydrolyzate improves the membrane separation effect of a filter membrane and maintains a large flux of the membrane.

The invention discloses a preparation method of a filtering material for adsorbing fluorine ions in water, and a preparation method, wherein Al-PAM, NaOH, diethylenetriamine, carbon disulfide, (NH4)2CO3, AlCl3 and a monomer acrylamide are used main raw materials, an adsorbent uses a metal hydroxide colloid as a base material, and a large number of polyacrylamide polymer branch chains are grafted on the surface of nanoparticles to obtain an organic-inorganic hybrid flocculating agent. According to the present invention, the raw materials are simple, the preparation process and the treatment process are simple, the chemical stability is high, the method is easy to implement in practical applications, and the product has excellent adsorption effect on fluorine ions in water.

The invention relates to a stirring and extracting bar for a polyacrylate compound nanocarbon fiber coating and its preparation method. The stirring and extracting bar is composed of a bar body and a coating on the surface of the bar body, the bar body is prepared by an iron core which is shorter than that of a glass tube and sealed in the glass tube. The materials of the coating comprise polyacrylate and nanocarbon fiber. The stirring and extracting bar uses the adsorption characteristics of polyacrylate and nanocarbon fiber, avoids the insufficiency of the single material adsorption effect, thereby enlarges the selectivity scope of the coating on an adsorbate with the coverage from polarity to non-polarity.