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328results about How to "Rich sources" patented technology

Wood adhesive active filler and using method thereof

The invention discloses a wood adhesive active filler. The wood adhesive active filler is formed by mixing a component (A) and/or a component (B). The component (A) is ultrafine powder which is prepared from fruits or seed shells which are rich in lignin, and comprises one or a mixture of the ultrafine powder of peanut shells, oil tea shells, walnut shells, almond shells, hawthorn shells, nut shells, pine nut shells and cottonseed shells. The component (B) comprises one or a mixture of ultrafine powder of larch barks, eucalyptus barks, black wattles, red bayberry barks and peach barks. The wood adhesive active filler has the advantages that agriculture and forestry processing residues are low in cost and are rich; the wood adhesive active filler replaces a great amount of flour and bean flour used in the artificial board industry, so that the situation of grain tension can be relieved; a new purpose is created for the agriculture and forestry processing residues, and the utilization value of the agriculture and forestry processing residues is increased; and a novel high-quality active additive is provided for the plywood industry, the formaldehyde release amount of a plywood can be decreased, and further the bonding strength of the plywood can be remarkably improved.
Owner:北京光纪国际生物科技服务有限公司

Method for producing polyaluminum chloride without heating

InactiveCN103833059ARich sourcesProcess energy savingAluminium chloridesSlagChemistry
The invention discloses a method for producing polyaluminum chloride without heating. The method comprises the following concrete steps: (1) sequentially adding a waste aluminum chloride liquor generated in a Friedel-Craft reaction, an aluminiferous hydrochloric acid, an industrial hydrochloric acid and water into a heat insulating reaction kettle to prepare a mixed acid in which the percentage of Al2O3 is 1% to 4% and the percentage of HCl is 12% to 18%; (2) adding aluminum oxidized sludge into the mixed acid, stirring for 60-90 minutes until the aluminum oxidized sludge is completely dissolved, heating to the reaction temperature of 60 DEG C to 80 DEG C, controlling the percentage of the HCl in a semi-finished product to be 0.5% to 3.5% and the percentage of the Al2O3 in the semi-finished product to be not less than 5.0%; (3) adding calcium aluminate powder into a semi-finished product liquid, regulating the percentage of the Al2O3 in the reaction liquid to be 11% to 12% and the basicity of the reaction liquid to be 60% to 90%, maintaining the temperature required by the reaction by utilizing the heat generated in the reaction, timing when the temperature rises to 90 DEG C, reaction under preserved temperature for 60-90 minutes and performing a filter pressing treatment to obtain a finished polyaluminium chloride product. By adopting the method to prepare the polyaluminium chloride, the production process is simple, no steam does need to be heated, the emission of acid mist and waste slag is reduced, the production cost is lowered and the recycle of waste resources is realized; therefore, the method is an economical and practical production method which saves energy and reduces emissions.
Owner:CHANGZHOU WUJIN YOUBANG WATER PURIFICATION MATERIALS

Method for preparing chitosan/sodium alginate natural polymer core-shell microspheres by one-step process

The invention belongs to the field of polymer materials and bio-medical materials and particularly relates to a method for preparing chitosan/sodium alginate natural polymer core-shell microspheres by a one-step process. The method is characterized by comprising the following steps: firstly, preparing a calcium chloride/chitosan mixed solution and a sodium alginate solution; dripping the calcium chloride/chitosan mixed solution into the sodium alginate solution by use of a microinjector; placing to form microspheres; taking out the microspheres; and cleaning with distilled water to finally obtain the chitosan/sodium alginate natural polymer core-shell microspheres. The method has the advantages that the preparation process is simple, the preparation steps are simplified, the equipment is simple, the preparation conditions are mild, the control is easy, the repeatability is good, after-treatment is not needed, and the cost is low. The natural polymer materials which have the characteristics and advantages of being rich in source, green and environment-friendly, favorable in biocompatibility, non-toxic, biodegradable, and low in price are adopted as the preparation raw material, so that the prepared chitosan/sodium alginate natural polymer core-shell microspheres have a very high application value in the bio-medical field.
Owner:WUHAN UNIV OF TECH

Preparation method of water-soluble fluorescent calcium fluoride nanoparticle

ActiveCN107815309ARich sourcesEasy sourceCalcium/strontium/barium fluoridesNanoopticsIonCalcium EDTA
The invention relates to a preparation method of water-soluble fluorescent calcium fluoride nanoparticle. The preparation method comprises the following steps of dissolving soluble calcium salt into deionized water, so as to form a solution A; dissolving soluble citrate salt and soluble amino acid into the deionized water, so as to form a solution B; dissolving soluble fluoride salt into the deionized water, so as to form a solution C; gradually dripping the solution B into the solution A, and stirring, so as to form a mixing solution D; gradually dripping the solution C into the mixing solution D, and stirring, so as to form a mixing solution E; reacting the mixing solution E in a sealed hydrothermal reactor, and cooling to room temperature, so as to obtain a reaction solution; alternatively centrifuging and washing precipitate after centrifuging of the reaction solution by the deionized water and absolute ethyl alcohol, re-dispersing into the deionized water, and adjusting the pH (potential of hydrogen) value to 8.0 to 10.0, so as to obtain the water-soluble fluorescent calcium fluoride nanoparticle. The preparation method has the advantages that the raw materials are poisonlessand green, the sources are rich, the obtaining is easy, the cost is low, and the synthesis technology is simple; the product quality is stable, the technology repeatability is good, the crystallizingdegree and stability of the particles are good, and the water-soluble fluorescent calcium fluoride nanoparticle can be applied into biological materials and coating materials.
Owner:HUBEI UNIV OF TECH
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