91 results about "Aragonite" patented technology

Disclosed is a novel form of particulate precipitated aragonite, and a novel process for producing it.

The present invention relates to the preparation process of high purity aragonite type calcium carbonate whisker. The present invention prepares aragonite type calcium carbonate whisker with lime or slaked lime as main material and magnesium salt as crystal salt controlling agent and through a CO2 carbonating process. The process features the repeated use of the magnesium salt solution and the homogeneous replenishment of lime slurry during carbonating reaction. The process has low production cost, less environmental pollution and high calcium carbonate whisker yield, and the prepared calcium carbonate whisker has high purity and high length/diameter ratio. The process is suitable for industrial production of calcium carbonate whisker.

The invention relates to a preparation method of aragonite crystal form calcium carbonate, comprising the following steps: lime is sent into a digestion equipment and added with water for digestion treatment, water and quick lime are added slowly according to the ratio of 3:1 to 5:1, calcium hydroxide emulsion is obtained by filtrating, the calcium hydroxide emulsion is sent into a carbonization equipment, magnesium hydroxide needle crystal is added as a seed crystal, CO2 is injected in the materials which are mixed at the same time, aragonite crystal form light calcium carbonate is obtained by carbonization reaction; the light calcium carbonate screened pulp is sent into a filtration device for dehydrating and calcium carbonate filter cake is obtained; the sodium polyacrylate is added as a dispersant and light calcium carbonate with particle size distribution of 1-2 mum is obtained after grinding, thus obtaining a dispersion liquid product which reachs 70% of solid content or the liquid product is sent into a drying device for drying to obtain light calcium carbonate dry powder. The preparation method enjoys cheap price, simple preparation process and perfect performance, thus being applicable to the industrialized production. The obtained aragonite crystal form calcium carbonate is suitable to be a papermaking coating.

Disclosed is a novel form of particulate precipitated aragonite, a novel process for producing it and compositions containing it.

The invention relates to a method for distinguishing pearl powders from shell powders, comprising the following steps: the pearl powders and the shell powders are calcined and then respectively mixed with potassium bromide to be made into transparent flakes, then the infrared spectrum of the transparent flakes is measured under the conditions of resolution of 4 cm<-1> and scanning for 16 times with the scanning range of 400-4000 cm <-1>, the pearl powders and the shell powders are distinguished according to the characteristic peak of 701.0 cm <-1>, 1082.1 cm <-1>, 2919.3 cm<-1> and 3468.5 cm <-1>; as organic substances in the calcined pearl powders are partially decomposed, the crystal type of calcium carbonate changes from the aragonite type to the calcite type, and the calcium carbonate starts to decompose; the organic substances in the shell powders are almost totally decomposed, the aragonite type calcium carbonate is totally converted into the calcite type calcium carbonate, and the calcium carbonate does not start to decompose into calcium oxide yet, therefore, the method can be used for distinguishing the pearl powders from the shell powders. Compared with the prior distinguishing method, the method can simply, rapidly and effectively distinguish the pearl powders from the shell powders with obvious phenomenon.

Disclosed is a novel form of particulate precipitated aragonite, and a novel process for producing it.

This invention provides aragonite- and calcite-based scaffolds for the repair, regeneration, enhancement of formation or a combination thereof of cartilage and/or bone, which scaffolds comprise at least two phases, wherein each phase differs in terms of its chemical content, or structure, kits comprising the same, processes for producing solid aragonite or calcite scaffolds and methods of use thereof.

This invention is directed to coral scaffolds seeded with precursor cells in culture in the presence of a chelator and uses thereof in inducing or enhancing bone and/or cartilage formation in a subject, and kits related thereto. This invention is also directed to use of cadherin-upregulating coral for treating cancer or inhibiting cancer progression. This invention is also directed to use of aragonite or calcite-producing species for in vivo calcium release, and its application to the treatment of skin diseases, disorders or conditions.

The invention belongs to the technical field of energy conservation and environment protection and particularly relates to an environmental interior wall putty powder. The environmental interior wall putty powder is composed of, by weight percentage, 25%-30% of white cement, 10%-15% of mineral powder, 10%-15% of aragonite powder, 5%-8% of porous absorbent materials, 1.5%-2.2% of dispersible emulsion powder, 1%-5% of bonder, 1%-3% of magnesium lithium silicate, 0.2%-1% of water-retaining agent, 2%-5% of negative ion powder, 0.05%-0.25% of antiseptic and mildewproof agent, 0.2%-0.8% of surfactant, 1%-3% of degerming agent, 0.02%-0.1% of deforming agent and quartz sand powder as balance. The environmental interior wall putty powder is green and environmentally friendly and achieves the functions of heat preservation and insulation, bacteria and mildew prevent, moisture absorption and desorption, air cleaning and the like, and meanwhile, achieves good decorative effects, high waterproofness and scrubbing resistance, thereby being capable of directly serving as decorative materials.

The invention relates to a secondary convex-surface porcelain plate picture. The secondary convex-surface porcelain plate picture comprises a porcelain plate base plate and a bottom glaze layer arranged on the surface of the porcelain plate base plate, wherein a convex point formed by sintering convex-surface glaze is dispensed on the surface of the bottom glaze layer; bottom glaze selects matte glaze, and is prepared from the following components in parts by weight: 30 to 40 parts of micalex, 10 to 20 parts of potassium feldspar, 25 to 35 parts of kaolin, 0.5 to 2 parts of bone meal, 4 to 10parts of sodium feldspar, 6 to 18 parts of barium carbonate, 3 to 18 parts of aragonite, 2 to 8 parts of limestone, 6 to 15 parts of borax, 10 to 20 parts of epsomite and 10 to 15 parts of aluminum oxide; when the secondary convex-surface porcelain plate picture is fired, firstly, each glaze slurry raw material is wetly milled to generate material slurry; then the matte glaze is sprayed on the surface of the porcelain plate base plate, and is dried and fired; then convex surface glaze is dispensed on a matte base plate, and secondary firing is carried out to prepare the secondary convex-surface porcelain plate picture. According to the secondary convex-surface porcelain plate picture and a firing technology thereof, the convex surface glaze is dispensed on the matte glaze, and secondary firing is carried out; a production technology is simple and convenient, so that the porcelain plate picture has a bulge and a good transparent feeling; the porcelain plate picture is stereoscopic and vivid and has a good expressive force.

The invention discloses a quasi-hexagonal flaky calcium carbonate metastable crystal form (aragonite) grain and a preparation method thereof. The grain is mainly quasi-hexagonal flake, and has narrow grain size distribution with average grain diameter of between 1 and 2 mu m. The method is to use a calcium salt system consisting of organic calcium salt (calcium dodecyl sulfate and the like), an organic additive (n-amyl alcohol and the like) and ammonia to react with carbon dioxide to generate the quasi-hexagonal flaky calcium carbonate metastable crystal form (aragonite) grain. The grain has strong capability of product surface coating and covering, is easy to disperse, and has excellent optical performance and printing performance, so that a paper product prepared by the grain has higher whiteness, brightness and shading performance, can save dosage of paper pulp, and can reduce cost of paper making.

The invention relates to a descaling device and method, in particular to a descaling device and method of a circulation cooling water system. According to the descaling device of the circulation cooling water system, a water tank, a pump, a valve, a cooling part and a flow meter are connected into a closed loop through a pipe, a scale inhibitor storage tank is connected onto the water tank, and anadjustable permanent magnet is arranged on the pipe. According to the descaling method, in order to improve the descaling efficiency, a scale inhibitor is added after the magnetic field runs for a certain period, remaining scaling ions are removed by the scale inhibitor, the number of hydrogen bonds and activation energy of a water system can be increased through positive ions in the scale inhibitor, and accordingly the descaling rate is greatly increased; the proportion of aragonite to vaterite can be conveniently increased, the proportion of calcite is reduced, the descaling efficiency of the scale inhibitor can also be improved through the magnetic field, the use quantity of the composite non-phosphorus corrosion and scale inhibitor is greatly lowered at the same time, the production cost is lowered, and secondary pollution is reduced.

The invention discloses abalone shell pearl layer powder and a processing method of the abalone pearl layer powder. Abalone shell is used as a raw material, abalone shell pearl layer with an aragonite structure is prepared through a crushing process, the prepared pearl layer powder has the characteristics of solubility in acid, insolubility in acid and insolubility in water, and the content of aragonite calcium carbonate is equal or greater than 94 percent; the prepared pearl layer powder has the original nacreous luster of the inner layer of the abalone shell, and the removal rate of impurities such as calcium carbonate with a non-aragonite structure, cuticle, prismatic-calaite layers, algal pigment and the like is not lower than 91 percent. According to the invention, under a lower temperature condition, an acid solution with lower concentration is adopted, the impurities can be removed within short time through acid pickling, a medicinal composition pearl layer is retained to a great extent, superfine grade and nanoscale pearl layer powder can be further obtained through smashing, the conception is novel, the raw materials are rich, the production efficiency is high, the production cost is low, the processing technology is simple, green environmental protection is achieved, the implementation is convenient, the abalone shell pearl layer powder conforms to industrial development trend of traditional Chinese medicine modernization and internationalization, and a greater generalization performance is achieved.

The invention belongs to the recovery utilization of solid waste-alkali recovery white mud in paper-making industry and in particular relates to a preparation method of aragonite type white mud calcium carbonate. The existing method for preparing white mud calcium carbonate with certain crystal form has the prominent problems that the preparation process control requirement is high and the alkali recovery efficiency is seriously influenced. Quicklime or hydrated lime and a part of purified green liquid are reacted at 60-100 DEG C to form a crystal nucleus solution, and then the crystal nucleus solution is reacted with the remained purified green liquid at 60-100 DEG C for 30-120min, the temperature is preserved for 30min, then filtering and washing are carried out to obtain the aragonite type white mud calcium carbonate. The filling performance of the prepared white mud calcium carbonate can be improved, and no obvious influence on the existing production process control and the alkali recovery efficiency is caused.

The invention discloses a preparation method of aragonite type crystal seeds and aragonite type light calcium carbonate. The preparation method comprises the following steps: calcining limestones anddigesting the limestones with hot water to prepare coarse slurry; after thickening the coarse slurry, removing impurities to prepare fine slurry; pumping the fine slurry into a carbonizing tower, adding a crystal form control agent to regulate, and uniformly stirring the mixture; introducing kiln gas to carbonize, detecting the pH value and the conductivity online, and judging the carbonizing endpoint; adding a crystal form modifier to regulate; screening the mixture to remove impurities, and carrying out filter press to obtain a filter cake; dispersing the filter cakes to prepare slurry andthen grinding the slurry to obtain aragonite crystal seeds for later use; then pumping the fine slurry into the carbonizing tower again, adding the aragonite type crystal seeds, and uniformly stirringthe mixture; and then introducing kiln gas again to carbonize to obtain the aragonite type crystal seeds. The aragonite type light calcium carbonate prepared by the method has a needle-like crystal shape, and not only can be used as papermaking filler, but also can be used as a paper coating material. The production process is simple, the production cost is relatively low, and industrial production is achieved.

The invention discloses a method for synthesizing an aragonite nanorod under conditions of normal pressure and temperature. In the method, a solen protein layer is taken as a substrate, and an aragonite nanorod product is obtained by reacting a calcium chloride solution with carbon dioxide for 3-12 hours under the conditions of normal pressure and temperature by using a carbon dioxide diffusion deposition method. By taking the solen protein layer as the substrate for reaction under the conditions of normal pressure and temperature, the method has the characteristics of low reaction temperature, less consumed energy, high purity (above 99 percent) of a product, simple synthesis process, readily available raw materials, no pollution and the like. The aragonite nanorod is an ideal organic-inorganic composite nanomaterial. The aragonite nanorod can be used as a reinforcing material for reinforcing the toughness of an organism and improving the plasticity of the organism, and also can be used as a biological active material which is specifically applied to the fields such as the medicine field and the like.

The present invention relates to pearl post-treating process, and is especially one pearl treating process, in which bioactive enzyme is used in treating pearl to raise pearl brightness. The enzymatic pearl treating process includes the following steps: pre-treatment; compounding buffering liquid or saturated sodium carbonate solution; brightening pearl with enzyme preparation; brightening pearl with fluorescent brightener and others. Bioactive enzyme with biocatalytic effect in buffering liquid environment is utilized to eliminate attached matter in the surface of pearl for exposing bright pearl aragonite crystal, and the fluorescent brightener is used to shorten the brightening period.

The invention discloses a method for removing high concentration phosphor pollution in alkali wastewater, which comprises the following steps: Step1) synthesizing a magnesium doped aragonite (Mg/CaCO3) type calcium carbonate nano adsorbent; step2)adding the magnesium doped aragonite type calcium carbonate adsorbent in the water containing phosphor; step3) effecting the adsorbent in a solution for more than 4 hours; and step4) standing for a segment of time, and depositing the synthesized magnesium doped aragonite type calcium carbonate adsorbent particles to remove phosphor in the aqueous solution. The invention provides the method for removing the high concentration phosphor in alkali wastewater, the pollution clearance of high density phosphor (the concentration is 500mg/L) in the alkali wastewater can reach more than 80%, the foundation of the water environment purification and resource reutilization can be established, and the method for removing high concentration phosphor pollution in alkali wastewater has good economic and social benefit.

The invention provides an aragonite-type light calcium composition used in paper coatings. The composition comprises the components of 10-50% of aragonite-type light calcium, 50-90% of heavy calcium carbonate, 5-20% of styrene-butadiene latex, and 2-5% of a dispersing agent, a lubricant and a water repellent. The invention also provides a paper modification method comprising the following steps: Step 1, the aragonite-type light calcium composition used in paper coating, described in Claim 1, is provided; and Step 2, the composition is used in coating paper. With the paper-coating aragonite-type light calcium composition provided by the invention, paper printing surface strength can be improved by 5-30%, and paper gloss and printing gloss can be improved by 2-10%. Therefore, the quality of finished products is improved, and papermaking enterprise production costs can be reduced.

The invention discloses a method for preparing high purity aragonite type nano calcium carbonate by acidolysis of limestones and belongs to the technical field of preparation of nanomaterials. The method comprises the following steps: by using an abundant mineral resource limestones in nature as raw materials, directly acid leaching without adding any additive; and carrying out a replacement reaction on the acid-leached CaCl2-NH4Cl filtrate and a sodium carbonate solution to obtain the high purity aragonite type nano calcium carbonate. The method disclosed by the invention avoids high temperature sintering, can save the energy consumption, reduce dust pollution generated by combustion of coal and solve the problem that the utilization ratio of the mineral resource is low, and can realize clean and environment-friendly production. The method disclosed by the invention is simple to operate and low in cost and the prepared aragonite type nano calcium carbonate is high in yield and purity and easy to realize industrialized production.

The invention discloses composite calcium naphthenate-based lubricating grease which is characterized by including following components, on the basis of the weight of the lubricating grease, 20-70 wt% of non-Newtonian calcium naphthenate, 1-10 wt% of a calcium salt of a higher fatty acid and 25-70 wt% of a basic oil. An infrared spectrogram of the non-Newtonian calcium naphthenate has a characteristic absorption peak of aragonite-type calcium carbonate. The invention also discloses a preparation method of the composite calcium naphthenate-based lubricating grease and the composite calcium naphthenate-based lubricating grease prepared through the same. The composite calcium naphthenate-based lubricating grease has excellent anti-corrosion property and anti-salt fog property, and has performances comprising a high-temperature-resistant performance, a water-resistant performance, an adhesive performance, a colloid stability and the like, which are better than those of composite calcium sulfonate-based lubricating grease. The composite calcium naphthenate-based lubricating grease has a longer lubricating service life. The preparation method is simple, environmental-protective, low in cost and stable in product quality.