122 results about "Calcium complex" patented technology

The invention discloses zinc, magnesium and calcium complexes of monophenol ligands with similar salan-structures as well as a preparation method thereof and the application in lactone ring-opening polymerization. The preparation method comprises the steps as follows: the similar salan-monophenol ligands react with zinc, magnesium and calcium metallo-organic compounds, and then target products are collected from reaction coarse products. The zinc, magnesium and calcium complexes comprise asymmetrical multidentate amino monophenol oxygroup ligands with the similar salan-structures, are effective lactone ring-opening polymerization catalysts, and can be used for ring-opening polymerization of lactide, caprolactone and the like. The multidentate monophenol oxygroup zinc, magnesium and calcium complexes have the very obvious advantages as follows: raw materials are easy to get, the synthetic route is simple, separation and purification are easy, and the performance is stable relatively; meanwhile, high catalytic activity is achieved; in addition, polylactone that is obtained through catalysis has higher molecular weight, and the requirements of industrial sectors can be satisfied. The structure of the zinc, magnesium and calcium complexes has the following general formula.

The invention relates to a calcium-complex starch-based microporous haemostatic material, and a preparation method and application thereof. The preparation method comprises the following steps of: firstly, preparing microporous starch loaded with carboxymethyl; secondly, complexing and assembling calcium ions; and finally, preparing the calcium-complex starch-based microporous haemostatic material, which has the pore diameter of 0.1-5um, the haemostatic time of 20 seconds to 30 minutes and can be completely degraded within 8 hours to 6 days. The cost of raw materials is low; the preparation method is simple; the obtained haemostatic material combines the physical haemostatic function of the microporous starch and the chemical haemostatic function of the carboxymethyl and the calcium ions, so that the haemostatic material is quick in haemostasis, high in efficiency, large in viscosity and good in biocompatibility, can be degraded in a body, and can be used for stopping bleeding of bleeding places such as human epidermis and internal tissues, massive bleeding places or active places of substantial organs in the body, and places where bleeding is difficult to control.

The invention provides a high-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and a preparation method. A thickening agent consists of 12-hydroxy stearic acid, boracic acid, salicylic acid and reactants of lithium hydroxide and calcium hydroxide, and additives comprise high-alkaline-value calcium alkyl benzene sulfonate and thiadiazole derivatives as extreme pressure agents and anti-rust agents. The 12-hydroxy stearic acid, the salicylic acid and the high-alkaline-value calcium alkyl benzene sulfonate are added into basic oil, the lithium hydroxide monohydrate of the boracic acid and the calcium hydroxide are added for carrying out saponification composition, the extreme pressure agents of thiadiazole derivatives and the anti-rust agents are sequentially added, and products are obtained after the post treatment. Because of the adoption of the proper raw material mixing ratio, the lubricating grease has good high-temperature performance,the drop point is higher than 280 DEG C, and the high-temperature long-service-life lubricating effect is reached. Simultaneously, the water-resistance capability and the extreme pressure wear resistance capability of the lubricating grease are obviously improved. The cooperative effect of the composite additives is sufficiently realized, so the high-temperature water-resistance long-service-lifecomposite lithium calcium base lubricating grease can meet the requirements of lubricating positions with the severe requirements on high and lower temperature performance, wear resistance extreme pressure performance, water resistance, mechanical stability and the like of the lubricating grease.

The present invention provides a prewashing treatment composition for clothes ensuring that superb washing ability is obtained by washing after it is applied to materials to be washed. The prewashing treatment composition comprises (a) a surfactant, (b) a chelating agent having a specified calcium-chelating capacity and a specified stability constant of calcium complex and a molecular weight of 1000 or less, (c) water and (d) an alkali agent in each specified ratio, and has a pH of 7.5 to 12 at 20° C.

A calcium complex grease composition is disclosed. The grease composition has a high dropping point and a suitable thickness and is stable to heat.

The invention relates to a preparation technology for an aquatic organism collagen peptide-calcium complex. The preparation technology comprises the following steps: 1, hydrolyzing raw materials of processed natural fish scales and fish skins by an inorganic acid or an organic acid to prepare a collagen peptide hydrolysate; 2, removing the sediment from the collagen peptide hydrolysate, carrying out depickling, separating purification and desalination concentration on the obtained supernatant to obtain a collagen peptide hydrolysate with the molecular weight of 1-20KDa; and 3, adjusting the pH value of the collagen peptide hydrolysate to 6-8, adding a calcium salt with the metal element calcium mole content equal to the mole content of amino nitrogen in the hydrolysate, and removing free metal element calcium and the inorganic salt which are uncomplexed from the obtained reaction liquid to obtain the liquid collagen peptide-calcium complex. The complex is added with vitamin D3 and ascorbic acid to prepare a compound aquatic organism collagen peptide-calcium supplement. The calcium supplement which can be used as a medicine for preventing and controlling diseases with symptoms of osteoporosis and the like and a functional health food can also be used as a safe high efficiency calcium nutriment and a vitamin D3 and ascorbic acid supplement.

The invention discloses a uniform internal crosslinked sodium alginate film and a preparation method thereof. The uniform internal crosslinked sodium alginate film comprises the following components in parts by weight: 1-5 parts of sodium alginate, 0.05-1 part of chitosan oligosaccharide-calcium complex compound, 0.05-1 part of 0.1 M NaOH solution, 1-5 parts of organic acid, 2-10 parts of glycerinand 40-85 parts of deionized water. A uniform calcium-crosslinked sodium alginate film is prepared by creatively taking the chitosan oligosaccharide-calcium complex compound as a sodium alginate internal crosslinking agent, regulating the pH value of a system and uniformly releasing divalent calcium ions in a sodium alginate film forming solution, so that the problem of film forming nonuniformitycaused by superlow local crosslinking degree of local overcrosslinking in an external crosslinking technology is overcome; meanwhile, the crosslinking degree of the film can be regulated and controlled by regulating the proportion of sodium alginate to the oligosaccharide-calcium complex compound; in addition, chitosan oligosaccharide released by the chitosan oligosaccharide-calcium complex compound can also make the film have a certain antibacterial property, so that the uniform internal crosslinked sodium alginate film has a good application prospect in fields of food industry and medicines.

The invention provides a lentinan calcium complex, and a preparation method and application thereof. The method comprises the steps of: adding a calcium chloride solution to an aqueous solution of lentinan with stirring, at 40-80 DEG C, regulating a pH value to 7-10 with sodium hydroxide, and continuously stirring for 1 h for a complex reaction; removing free calcium ions by a dialysis method; and concentrating and freeze-drying the lentinan compound solution to obtain the lentinan calcium complex with calcium content of 5.2mg / g. Compared with a blank group, the lentinan calcium complex can obviously promote mouse macrophage RAW264.7 to release immune factors, such as a tumor necrosis factor TNF-alpha and a cell factor IL-6. The preparation method of the lentinan calcium complex provided by the invention is simple and easy for practice. Besides, as an organic calcium, the lentinan calcium complex can also promote calcium absorption and improve immunity.

The invention relates to a catalyst capable of regulating and controlling the molecular weight of ethylene oxide and a preparation method thereof. The preparation method of the catalyst includes the steps that liquid ammonia reacts with calcium metal for 0.5-4 h at low temperatures of minus 80 DEG C to minus 10 DEG C to generate an ammonia-calcium complex solution, after a modifying agent composedof propylene oxide and azo compounds is added into solvent, reaction continues for 0.5-4 h, and through heating deamination and aging, the catalyst is obtained. Compared with the prior art, the prepared catalyst has the advantages of being high in activity and stability and capable of adjusting the molecular weight of polymers, and during the ring opening polymerization reaction of ethylene oxide(EO), polyoxyethylene series products of which the molecular weights are 100 thousand to 200 million can be prepared.

The invention discloses a soil conditioner for blueberry cultivation. The soil conditioner comprises the following components in parts by weight: 100-120 parts of a bioorganic fertilizer, 80-90 parts of fermented bean residue, 20-30 parts of furfural residue, 40-45 parts of turf, 8-13 parts of humic acid, 10-15 parts of moss, 3-5 parts of functional polypeptide, 15-18 parts of a water-retaining agent, 150-180 parts of an auxiliary agent and 10-30 parts of a conditioning agent. The soil conditioner has the beneficial effects as follows: the furfural residue is used for substituting sulfur, so that the cost is reduced, the environment is improved and the pH value of soil is significantly reduced; a functional polypeptide calcium complex can inhibit calcium absorption of a blueberry root system and prevent iron-deficiency chlorosis or death of blueberry; the soil conditioner has the effects of fixing carbon, retaining water, reducing the soil bulk density, increasing the porosity and the like, is high in organic matter content, helps to increase the seed germination rate, promote the root system growth and delay root system aging in the later stage, and is a high-efficiency and environment-friendly soil conditioner for the blueberry cultivation.

The invention relates to a hydrophobic starch-nanometer calcium carbonate compound and a preparation method thereof, and belongs to the technical filed of hydrophobization temporary plugging. The preparation method of the compound comprises the following steps: placing 1000-2000g of starch in a kneader, sequentially adding 100-200g of sodium carbonate, 100-200mL of water and 125-250mL of ethanol, and carrying out a closed kneading reaction at a preset temperature; sequentially adding 125-250mL of ethanol and 150-300Ml of benzoyl chloride, and carrying out a closed kneading reaction at 30-40DEG C; slowly adding 500-1500g of nanometer calcium carbonate, and carrying out a closed kneading reaction at 30-50DEG C; and stopping stirring, cooling to room temperature, allowing the obtained material to stand for 3-6h, discharging the material, washing, drying, and crushing to obtain a product. The product has a same substitution value with products obtained through an organic solvent method, can effectively reduce the oil phase starting pressure, increases the oil water passing ratio, maintains high permeability restoration ratio, and has a good reservoir protection effect.

The invention relates to the technical field of preparation of compounds for promoting bone health, and provides a preparation method of a sea cucumber oyster glycopeptide calcium complex. The methodcomprises the following steps: subjecting sea cucumbers and oyster meat to enzymolysis so as to obtain a sea cucumber oyster glycopeptide solution, subjecting the sea cucumber oyster glycopeptide solution to enzymolysis, then preparing calcium acetate by using the oyster shells, and chelating the calcium acetate with sea cucumber oyster glycopeptides so as to obtain the sea cucumber oyster glycopeptide calcium complex. The invention also provides a preparation method of a sea cucumber oyster glycopeptide calcium complex compound, and the method compounds the sea cucumber oyster glycopeptide calcium complex with glucosamine, medicinal and edible extract and a calcium absorption enhancer so as to obtain the sea cucumber oyster glycopeptide calcium complex compound. Thereby, the sea cucumberoyster glycopeptide calcium complex compound provided by the invention can be used as a natural health product for promoting bone health, and can improve the symptoms of osteoporosis and osteoarthritis which are prevalent among middle-aged or postmenopausal women.

Hafnium is recovered from irradiated tantalum by: (a) contacting the irradiated tantalum with at least one acid to obtain a solution of dissolved tantalum; (b) combining an aqueous solution of a calcium compound with the solution of dissolved tantalum to obtain a third combined solution; (c) precipitating hafnium, lanthanide, and insoluble calcium complexes from the third combined solution to obtain a first precipitate; (d) contacting the first precipitate of hafnium, lanthanide and calcium complexes with at least one fluoride ion complexing agent to form a fourth solution; (e) selectively adsorbing lanthanides and calcium from the fourth solution by cationic exchange; (f) separating fluoride ion complexing agent product from hafnium in the fourth solution by adding an aqueous solution of ferric chloride to obtain a second precipitate containing the hafnium and iron; (g) dissolving the second precipitate containing the hafnium and iron in acid to obtain an acid solution of hafnium and iron; (h) selectively adsorbing the iron from the acid solution of hafnium and iron by anionic exchange; (i) drying the ion exchanged hafnium solution to obtain hafnium isotopes. Additionally, if needed to remove residue remaining after the product is dried, dissolution in acid followed by cation exchange, then anion exchange, is performed.

The present invention discloses one kind of (-)-epigallocatechin gallate (EGCG)-Ca complex solid dispersion and its preparation and application. The EGCG-Ca complex solid dispersion contains EGCG-Ca complex and PVP-k30 in the weight ratio of 1 to 4-25, optimally 1 to 7-12. The preparation process of the EGCG-Ca complex solid dispersion includes dissolving EGCG in deionized water, dropping saturated calcium salt solution while stirring and introducing protecting nitrogen until complete precipitation, collecting the precipitate, suspending and washing with deionized water, centrifuging to collect precipitate as the EGCG-Ca complex, mixing EGCG-Ca complex and PVP-k30 in required ratio, dissolving the mixture in water while introducing protecting nitrogen, high pressure homogenizing, filtering, spray drying the filtrate to obtain the EGCG-Ca complex solid dispersion, which is used in treating senile osteoporosis in high curative effect.

The invention belongs to a refining technique outside a steelmaking furnace, and particularly relates to a seamless aluminum-containing core-spun yarn for molten steel disoxidation calcium treatment. The core-spun yarn is composed of an outer cladding and an inner core, wherein the outer cladding is coated on the external surface of the inner core; the outer cladding is composed of a steel belt which is 0.3-0.8mm thick; and the inner core is prepared from one or both of aluminum and calcium. The thickness of the outer cladding steel belt can be adjusted according to the size of the ladle, so that the calcium metal can be fed to the depth of molten steel, and the static pressure on the calcium metal is increased; and since the aluminum metal and the calcium metal can form an aluminum-calcium complex element in the molten steel, the mutual protection enhances the oxidation resistance. The introduction of the aluminum enhances the boiling point of the calcium metal and reduces the gasification of the calcium metal, thereby increasing the yield of the calcium metal and aluminum metal, and thoroughly solving the problem of splashing in the molten steel calcium treatment process.

A novel calcium complex for the fortification of beverages and foods, especially milk, is disclosed. The fortifying complexes contain a calcium source and a negatively-charged emulsifier with or without an organic or inorganic acid or a salt thereof. These complexes have been found to be particularly effective in fortifying milk and milk-protein containing beverages without coagulation of the proteins or without significantly changing the texture of the product.