155 results about "Calcium hydroxyphosphate" patented technology

Calcium-strontium-hydroxyphosphate (strontium-apatite-) cement preparations are described, comprising a powder mixture, which contains molar quantities of the components calcium (Ca), strontium (Sr) and phosphate (P) in the mixture in the ranges 1.00<Ca / P≦1.50 and 0<Sr / P<1.5, together with an alkali salt or an ammonium salt of phosphoric acid, and with water and / or an aqueous solution. The powder mixture particularly contains, as the Ca-component, Ca3(PO4)2 (TCP), and as the Sr-component SrHPO4 and / or Sr3(PO4)2 and optionally additional SrCO3. As the aqueous mixing solution for the formation of the strontium-apatite cement, an aqueous solution of an alkali salt or an ammonium salt of the phosphoric acid is suitable.

The invention discloses an inorganic material hybrid hard melamine polyurethane foam heat insulation material, a preparation method thereof and combined polyether used therein. The combined polyether comprises: a polyol flame retardant, hydroxyl calcium phosphate, an inorganic material compounded with hydroxyl calcium phosphate, glycerin, N, N, N, N, N-pentamethyl diethylenetriamine, dimethyl cyclohexyl amine, 33+ / -1Wt.% triethylene diamine's dipropylene glycol solution, organic tin, hexahydro triazine, a foaming agent 141B, water, and silicone oil AK-158. The preparation method includes: mixing the combined polyether with isocyanate in ratio, and then carrying out spraying or casting foaming moulding, thus forming the heat insulation material. The heat insulation material has the characteristics of stable physical performance, no deformation, no shrinkage, strong bonding force, low thermal conductivity, an oxygen index up to over 30%, and a combustion heat release rate increase index of less than 250W / S.

The invention relates to a preparing method for a complex function repairing agent for treatment of heavy metal contaminated soil. Biomass charcoal, quick lime and a siliceous material serve as raw materials, biomass charcoal based tobermorite is synthesized through a hydrothermal reaction, and a biomass charcoal based hydroxyl calcium phosphate complex agent can be generated by biomass charcoal based tobermorite in a phosphate solution. In land utilization, the complex agent has the function of enhancing soil fertility and can also effectively stabilize heavy metal ions in the soil, the mobility and the bio-availability of heavy metal are reduced to the maximum, and the purpose of in-situ repair of the heavy metal contaminated soil is achieved. The prepared complex function repairing agent has the advantages of being high in content of active ingredients, long in heavy metal stabilizing effect, wide in application range, small in using quantity, easy to prepare, low in cost and the like, and can be used for long-acting on-situ repair of farmland heavy metal contaminated soil or other industrial heavy metal contaminated soil.

This invention provides a method of phosphorus removal in high-phosphate-content industrial wastewater and phosphorus resource recovery of high-phosphate-content industrial wastewater, solves the problems of phosphorus removal in industrial wastewater, domestic sewage and other types of sewage and phosphorus resource recovery, and is particularly applicable to the field of the high-phosphate-content industrial wastewater. The method comprises the following steps: uniformly mixing 0 to 0.5 part of inorganic electrolyte, 0 to 2.5 parts of a water-soluble high-molecular polymer, 5 to 10 parts of calcium hydroxide (or calcium oxide) and 87 to 95 parts of soluble calcium salt in percentage by weight to obtain an inorganic-organic composite phosphorus removal chemical reagent; and adjusting the PH value of the wastewater with acid and alkali, oxidizing non-orthophosphate ions in the wastewater with an oxidant to adjust the acidity of the wastewater, and adding the inorganic-organic composite phosphorus removal chemical reagent to precipitate the phosphorus in the wastewater. The total amount of phosphorus in the wastewater is reduced from about 15500 mg / L to 5 mg / L or below. The main component of a filter cake is hydroxyl calcium phosphate, and the phosphorus content reaches 15 percent or above; and the filter cake can be used for preparing phosphoric acid or phosphate fertilizer.

The present invention relates to the preparation process of compound inorganic germicide, and belongs to the field of purifier material preparing technology. The present invention features that the surface of titania grain with photocatalytic activity has loaded porous structure coating layer of calcium hydroxy phosphate and to load germicidal silver ion in the porous structure. The preparation process includes mixing nano titania, ammonium dihydrogen phosphate and calcium nitrate to react inside a micro mixing reactor to obtain compound powder suspension; dropping the water solution of silver nitrate into the suspension for ion exchange to deposit silver ion on the surface of the compound grain; and heat treatment at 400-500 deg.c for 1 hr to obtain the compound inorganic germicide. The compound inorganic germicide has the synergistic effect of photocatalysis and metal ion germicide.

The invention discloses a hydroxyl calcium phosphate-active carbon composite material and application thereof. The composite material comprises active carbon and hydroxyl calcium phosphate in a mol ratio of 24-36: 1. The preparation method comprises the following steps: (1) adding calcium oxide or calcium hydrate into a phosphoric acid solution where active carbon suspends and carrying out a reaction under stirring, wherein a mol ratio of phosphoric acid to calcium oxide or calcium hydrate is 3: 4.8-5.2; (2) adjusting the pH value of a solution obtained in the step (1) to 8-9, carrying out stirring and carrying out standing for aging; and (3) subjecting the solution to solid-liquid separation and carrying out drying and levigation so as to obtain the composite material. The composite material has a substantial treatment effect on lead and cadmium pollution; selected raw materials do not contain substances posing pollution to the environment; and the composite material has low preparation cost and restoration cost.

The invention discloses strontium-reinforced bioactive glass ceramic, belonging to the technical field of biomaterials. The traditional hydroxyl calcium phosphate ceramic or strontium-reinforced bioactive glass ceramic has lower strength. The strontium-reinforced bioactive glass ceramic disclosed by the invention comprises the following glass ceramic components in percentage by weight: 30-50 percent of SiO2, 5-25 percent of P2O5, 8-45 percent of CaO, 6-20 percent of Na2O, 5-45 percent of SrO, 1-10 percent of ZnO and 0.05-1 percent of Ag2O. The structural form of the strontium-reinforced bioactive glass ceramic is glass ceramic, the microcrystalline composition of the strontium-reinforced bioactive glass ceramic is Ca8Sr2(PO4)6(OH)2 and the Vickers hardness (HV) value of the strontium-reinforced bioactive glass ceramic is 509kg / mm<2>. The strontium-reinforced bioactive glass ceramic is used for toothpaste as an addictive, or can be used for repairing teeth as a dental material.

The invention provides an artificial skull repairing piece and a preparation method thereof. A 3D printing technology is adopted in the preparation method; autologous bone powder and hydroxyl calcium phosphate are used as basic raw materials of the artificial skull repairing piece, and thus the problem in biocompatibility of the artificial skull repairing piece is effectively solved; the outline dimension matching degree between the 3D printed artificial skull repairing piece and the defect part is high, and thus the working strength of doctors is greatly reduced; with good biocompatibility, the artificial skull repairing piece is conducive to inducing bone cell growth and promoting repairing; and due to high mechanical strength, the operation safety is improved.

The invention discloses a high-precision multi-tissue simulation fetal model, and belongs to the field of medical applied researches. The model mainly comprises simulation fetal bones, simulation fetal organs and simulation fetal muscular tissues, wherein the simulation fetal bones are made of hydroxyapatite, the simulation fetal organs are made of elastic materials, the simulation fetal muscular tissues are made of elastic materials, and the model is characterized in that according to computed tomography data of a fetus, the three-dimensional printing technology is adopted to make a fetal high-precision acrylonitrile-butadiene-styrene plastic model, and a simulation fetal silicone mold is made through the model. The manufactured simulation fetal organs and the simulation fetal bones are fixed in the mold, simulation muscular tissue material pouring is carried out, and the manufacturing of the simulation fetal model is completed. The manufactured simulation fetal model provides the characteristics such as ultrasound and X-ray detection of the external fetal simulation shape, the internal organs and the bones, and is widely applied to the fields, such as medical training and teaching, medical image processing and medical equipment detection.

The invention belongs to the field of molecular imaging technologies, and discloses a pH (potential of hydrogen)-responsive type ultra-sensitive nanometer fluorescent probe and a method for preparingthe same. The pH-responsive type ultra-sensitive nanometer fluorescent probe comprises pH-responsive matrix materials and fluorescent organic small-molecule dye. The pH-responsive matrix materials comprise calcium phosphate, hydroxy calcium phosphate, fluorapatite, calcium carbonate and ZIF series; the fluorescent organic small-molecule dye is positively charged dye or negatively charged dye. Themethod includes coating the positively charged dye with the negatively charged matrix materials; coating the negatively charged dye with the negatively charged matrix materials; coating the negativelycharged dye with the positively charged matrix materials. The pH-responsive type ultra-sensitive nanometer fluorescent probe and the method have the advantages that the fluorescent imaging sensitivity and specificity can be greatly improved as compared with the traditional small-molecule fluorescent dye, and response of tumor micro-environments can be detected in an ultra-sensitive manner; the pH-responsive type ultra-sensitive nanometer fluorescent probe which is a specific responsive probe prepared for unique properties of the tumor micro-environments is high in targeting, few in backgroundsignals and high in signal-to-noise ratio, small tumor can be detected in an ultra-sensitive manner, and the like.

The invention discloses a preparation method of soybean peptide biological calcium. The soybean peptide biological calcium is prepared through the following steps of using substrate yak bone powder and yak bone marrow powder as natural calcium sources, adjusting the pH, controlling the temperature of a water bath, and under the action of enzymes, enabling soybean peptides and the natural calcium sources in the water bath to be made into soybean peptide biological calcium products. The soybean peptide biological calcium prepared by the method disclosed by the invention is high in content of effective calcium. According to the preparation method, insoluble hydroxyl calcium phosphate in yak bones is effectively converted into the soluble soybean peptide biological calcium. Each 100g of the yak bone powder contains 22g of the calcium, and the extraction rate of calcium components in the yak bone powder can achieve 27%. The prepared soybean peptide biological calcium also reserves other substances, such as protein, bioactive peptides and amino acids in the yak bones and bone marrows, which are beneficial for human bodies. The yak bone marrow powder is added, so that the conversion rate of the soluble calcium components is increased, and besides, the beneficial substances such as the protein and the macromolecule peptides are converted into micromolecular polypeptide substances through enzymolysis, and are completely reserved. The soybean peptide biological calcium has the effect of improving the immunity of human bodies.