20258 results about "Calcium carbonate" patented technology

Hydrogen is produced from solid or liquid carbon-containing fuels in a two-step process. The fuel is gasified with hydrogen in a hydrogenation reaction to produce a methane-rich gaseous reaction product, which is then reacted with water and calcium oxide in a hydrogen production and carbonation reaction to produce hydrogen and calcium carbonate. The calcium carbonate may be continuously removed from the hydrogen production and carbonation reaction zone and calcined to regenerate calcium oxide, which may be reintroduced into the hydrogen production and carbonation reaction zone. Hydrogen produced in the hydrogen production and carbonation reaction is more than sufficient both to provide the energy necessary for the calcination reaction and also to sustain the hydrogenation of the coal in the gasification reaction. The excess hydrogen is available for energy production or other purposes. Substantially all of the carbon introduced as fuel ultimately emerges from the invention process in a stream of substantially pure carbon dioxide. The water necessary for the hydrogen production and carbonation reaction may be introduced into both the gasification and hydrogen production and carbonation reactions, and allocated so as transfer the exothermic heat of reaction of the gasification reaction to the endothermic hydrogen production and carbonation reaction.

Methods of drilling and completing open hole well bores and methods of removing filter cake comprised of a gelling agent and calcium carbonate are provided. A method of the invention for removing filter cake comprised of a gelling agent and calcium carbonate from the walls of an open hole well bore is basically comprised of the steps of contacting the filter cake with a delayed clean-up solution comprised of water and a formate ester and removing the clean-up solution from the well bore.

A dry powdered flowable cement composition contains calcium carbonate and a partially decarbonated magnesium carbonate. A slurry of the composition will set hard with various organic fillers including waste products and toxic waste. The composition can be slurried with contaminated water such as sea water, mineral laden ground water and muddy water. A high percentage of filler can be added while still having an acceptable set.

The spinal cage comprises a structural component having sufficient strength to withstand the compressive loading between vertebral bodies. The structural component is integrated with an osteoconductive component to facilitate bone growth between the vertebral bodies. The structural component may comprise any of PEEK, PEKK, or other structural material. The osteoconductive component may comprise any of allograft, natural bone, tricalcium phosphate, hydroxyapatite or a blend of calcium carbonate, calcium lactate and other calcium salts. A method for making the spinal cage involves molding polymers around an osteoconductive component, heat staking, and may further include ultrasonically welding, snap fit or mechanically assembling and/or adhesively bonding components.

The invention discloses a method for cultivating pure white needle mushrooms. The method comprises the following steps: a strain is prepared; a culture material is prepared; bagging and sterilization are carried out; inoculation is carried out; a mycelium is cultured; nutrition, humidity, temperature, light, air and other culture conditions are strictly controlled during a fruiting period; and harvesting is carried out in an optimum period. the formulation of the culture material is 0 to 32 percent of weed tree sawdust, 0 to 93 percent of cotton seed hulls or wheat straw, straw, corncob and other crop straw, 0 to 20 percent of wheat bran, 0 to 10 percent of corn meal, 0 to 10 percent of soybean meal, 0 to 1 percent of calcium carbonate, 0 to 0.2 percent of monopotassium phosphate, 0 to 0.2 percent of magnesium sulfate, 1 to 1.2 percent of sucrose, 0 to 10 percent of rice bran, 0 to 1 percent of plaster and 0 to 0.02 percent of urea. Quicklime and wettable carbendazim are added during the preparation of the culture material so as to prevent the pollution of undesired bacteria. The technical proposal aims to select proper breeds, popularize local large scale planting and improve cultivation benefit.

The invention relates to a hydrocarbon zone protective agent specific to fractured hydrocarbon zone in oil and gas drilling, in particular to a fractured temporary plugging additive, which is mixed by the components with the following mixture ratio: 40-85 percent of 60-1100 meshes of calcium carbonate superfine powder, 10-40 percent of plant fibers and 5-20 percent of oxidized asphalt. After the temporary plugging additive of the invention enters the stratum with the drillingfluid, a layer of compact and tenacious mud cake is quickly formed near the well wall for ensuring the original permeability of the stratum near the well wall to rapidly reduce to be nearly zero, thus preventing the intrusion of drilling fluid filter, various finishing agents, rock debris and the like which causes the reduction of oil and gas yield and capacity. The temporary plugging additive of the invention reaches more than 99 percent of temporary plugging rate to fractured core and more than 80 percent of pressure flowback and acidification flowback rate. Furthermore, the temporary plugging additive is characterized by wild temporary plugging range, little dosage, low cost and no pollution, thus being an ideal hydrocarbon zone protective agent.

Compositions comprising synthetic rock, e.g., aggregate, and methods of producing and using them are provided. The rock, e.g., aggregate, contains CO₂ and/or other components of an industrial waste stream. The CO₂ may be in the form of divalent cation carbonates, e.g., magnesium and calcium carbonates. Aspects of the invention include contacting a CO₂ containing gaseous stream with a water to dissolve CO₂, and placing the water under precipitation conditions sufficient to produce a carbonate containing precipitate product, e.g., a divalent cation carbonate.

PCT No. PCT/JP96/01630 Sec. 371 Date May 7, 1997 Sec. 102(e) Date May 7, 1997 PCT Filed Jun. 14, 1996 PCT Pub. No. WO97/09483 PCT Pub. Date Mar. 13, 1997The paper for rolling a smoking article of the present invention contains particle-form calcium carbonate (30 to 60 wt %), calcined clay (5 to 30 wt %) and pulp. Furthermore, an alkaline metal salt is contained as a chemical additive. In addition, kaolin is contained in the paper. The basis weight of the paper falls within the range of 20 to 70 g/m2. Optical characteristics of the paper and the burning characteristics and ash characteristics of a cigarette are improved and the side stream smoke is reduced.

The invention discloses an antioxidant and ultravioresistant polypropylene woven bag raw material. The polypropylene woven bag raw material is added with anti-oxidant B215, anti-oxidant 1010, auxiliary anti-oxidant DLTP (dilauryl thiodipropionate) or DSTP (distearyl thiodipropionate), ultraviolet absorber UV531, light stabilizer GW-480, stearic acid, calcium stearate, calcium carbonate, mono-alkoxy titanate coupling agent YDH-101, and zinc stearate in powdered polypropylene, and then subjected to wiredrawing treatment in a drawing machine. Compared with the prior art, the raw material provided by the invention has advantages of good antioxidant and ultravioresistant properties, the raw material is particularly suitable for being used as woven bag raw materials, especially for being used as the raw material for manufacturing container bags.

The present invention relates to a preparation method of biological affinity hydrophilic active magnetic seed filling material for treating water. It is characterized by that said method includes the following steps: mixing biological affinity substance, hydrophilic substance, magnetic powder and active carbon or magnetic powder and calcium carbonate in the high-molecular base material, and adding dispersion lubricating agent, uniformly stirring them, placing them into injection moulding machine, utilizing filling mould to make extrusion moulding and magnetizing, so as to obtain the invented filling material. It has biological affinity and hydrophilicity, at the same time can induce microbial activity and enzyme activity, and can raise oxygen utilization rate in water and water treatment efficiency.

Water-based adhesive compositions are improved by the incorporation of hollow polymeric microspheres having outer surfaces coated with one or more barrier materials such as calcium carbonate particles. The adhesive compositions exhibit enhanced rheology, sprayability, drying time, tack and storage stability as compared to analogous adhesives that are not modified with coated hollow polymeric microspheres. Such compositions are useful as both contact adhesives as well as wet bonding one-way adhesives.

The present invention is wear-resistant wood-plastic floor board and its production process, and belongs to the field of decoration material technology. Polyvinyl chloride resin or plastic material is added with waste wood powder or fiber material powder, active calcium carbonate, assistant, stuffer, etc, and the mixture is pelletized, and further treated through extruding, molding, vacuum cooling, settling, drawing and cutting to form the basic wood-plastic board. The basic wood-plastic board is polished, groove milled and covered with surface decoration layer to form the wear resistant wood-plastic floor board product. The wear resistant wood-plastic floor board is beautiful, wear resistant, fireproof, waterproof, non-skid, anticorrosive and environment friendly and has high strength, heat insulation, electrical insulation and other advantages.

Disclosed is an improved water treatment cavitation reactor cone. The tank operates on a continuous flow of fluids which are subjected to ultrasonic waves in combination with a high level of injected ozone. The treatment tank includes a tangential inlet that induces a rotating flow into the tank thereby increasing the mixing of the ozone within the effluent. The effluent is further treated with DC current. The treatment tank provides a cost efficient and environmentally friendly process and apparatus for cleaning and recycling fluids as contaminated as frac water, used to stimulate gas production from shale formations, as well as other types of fluids having various levels of contaminants such as aerobic and anaerobic bacteria and suspended solids. The calcium carbonate scaling tendency is reduced to an acceptable level without the use of acids, ion exchange materials, or anti scaling chemicals which is of economical and environmental significance and benefit.

The invention discloses crack self-remediation regenerated concrete based on urease production microorganism mineralization deposition and a preparation method. The crack self-remediation regenerated concrete comprises components, namely, expanded perlite carried with urease production microorganisms, cement, stone, sand, silica fume, water, urea, calcium chloride, a urease production microorganism suspension and a water reducing agent. The urease production microorganisms are adopted as a concrete crack remediation agent, urease can be generated through metabolism through the urease production microorganisms, and the urea can be decomposed into NH4<+> and CO3<2+>, and furthermore the calcium carbonate can be mineralized and deposited to remedy cracks. In the preparation process, a part of the crack remediation agent is directly mixed with the concrete, then cracks and holes in regenerated crude aggregate self and weak adhesion areas between regenerated aggregate and a new cement stone base can be remedied, and thus the mechanical property of the regenerated concrete can be improved; meanwhile, the other part of the crack remediation agent is firstly adsorbed into an expanded perlite carrier and is further mixed into the concrete, then the crack self-remediation property of the regenerated concrete in the service period can be improved, and thus the anti-penetrability performance and the durability of the regenerated concrete can be improved.

Ceramic materials operable to repair a defect in bone of a human or animal subject comprising a porous ceramic scaffold having a bioresorbable coating, and a carrier comprising denatured demineralized bone. The ceramic may contain a material selected from the group consisting of hydroxyapatite, tricalcium phosphate, calcium phosphates, calcium carbonates, calcium sulfates, and combinations thereof. The compositions may also contain a bone material selected from the group consisting of: bone powder, bone chips, bone shavings, and combinations thereof. The bioresorbable coating may be, for example, demineralized bone matrix, gelatin, collagen, hyaluronic acid, chitosan, polyglycolic acid, polylactic acid, polypropylenefumarate, polyethylene glycol, or mixtures thereof.

A reaction-based process has been developed for the selective removal of carbon dioxide (CO₂) from a multicomponent gas mixture to provide a gaseous stream depleted in CO₂ compared to the inlet CO₂ concentration in the stream. The proposed process effects the separation of CO₂ from a mixture of gases (such as flue gas/fuel gas) by its reaction with metal oxides (such as calcium oxide). The Calcium based Reaction Separation for CO₂ (CaRS-CO₂) process consists of contacting a CO₂ laden gas with calcium oxide (CaO) in a reactor such that CaO captures the CO₂ by the formation of calcium carbonate (CaCO₃). Once “spent”, CaCO₃ is regenerated by its calcination leading to the formation of fresh CaO sorbent and the evolution of a concentrated stream of CO₂. The “regenerated” CaO is then recycled for the further capture of more CO₂. This carbonation-calcination cycle forms the basis of the CaRS-CO₂ process. This process also identifies the application of a mesoporous CaCO₃ structure, developed by a process detailed elsewhere, that attains >90% conversion over multiple carbonation and calcination cycles. Lastly, thermal regeneration (calcination) under vacuum provided a better sorbent structure that maintained reproducible reactivity levels over multiple cycles.

The treatment apparatus is pressurized and operates on a continuous flow of fluids which are subjected to hydrodynamic waves, acoustic ultrasonic waves in combination with injected ozone and electro chemical treatment. The treatment system provides a cost efficient and environmentally friendly process and apparatus for cleaning and recycling fluids as contaminated as frac water, used to stimulate gas production from shale formations, as well as other types of fluids having various levels of contaminants such as aerobic and anaerobic bacteria and suspended solids. The calcium carbonate scaling tendency is reduced to an acceptable level without the use of acids, ion exchange materials, or anti scaling chemicals which is of economical and environmental significance and benefit. The treatment apparatus is modular in construction and compact in overall configuration. The treatment apparatus and associated equipment and electrical power generator is sized and configured to be mounted within a truck trailer body.

The invention provides a biodegradable polymer composition for a breathable film which comprises a biodegradable polyester such as polylactic acid, a biodegradable copolyester such as an aliphatic/aromatic copolyester, and a filler such as calcium carbonate. These compounds are melt blended and film formed and the film is then stretched in a monoaxial or biaxial direction to enhance pore formation and hence also enhance the breathability of the film. The water vapor transmission rate (WVTR) of the film is typically greater than 3,000 grams per square meter per day so that the film is suitable for use in disposable articles such as wipes, diapers, training pants, absorbent underpants, adult incontinence garments, feminine hygiene products, medical garments, bandages and the like.

The invention discloses a preparation method of a light-emitting composite paint. The preparation method comprises the following steps: (1) preparing a graphene/long afterglow phosphor composite; and (2) dispersing 3-6 parts of graphene/kaolin/SiO2 composite material and 2-4 parts of a graphene/calcium carbonate/SiO2 composite into 15-20 parts of deionized water, processing for 90-120 minutes so as to form a solution A3, dispersing 1-5 parts of graphene/red-emit phosphor/SiO2 composite into 15-20 parts of deionized water, processing for 90-120 minutes so as to form a solution B3, dispersing 1-5 parts of graphene/long afterflow phosphor composite into 15-20 parts of deionized water, processing for 90-120 minutes so as to obtain a solution C1, respectively and slowly dropwise adding solutions B3 and C1 in the solution A3 until a mixed solution is formed under conditions of performing ultrasonic shaking at a frequency of 200-400KW and stirring at a centrifugal speed of 500-800r/min, adding 70-80 parts of film forming matter, and mixing and stirring uniformly, so as to obtain the light-emitting composite paint. The preparation method is capable of obviously improving the luminous intensity and luminous uniformity of a water-borne luminous paint, and further improving the dispersibility of phosphor in the paint and the construction performance and storage stability of the paint.

The invention relates to a preparation method of an odorless environment-friendly humidifying antibacterial paint. The odorless environment-friendly humidifying antibacterial paint basically comprises 12-40% of emulsion, 5-20% of titanium white, 12-20% of kieselguhr, 2-6% of attapulgite, 4-8% of bamboo charcoal powder, 3-10% of nano TiO2/anion powder additive, 5-10% of light calcium carbonate, 5-10% of kaolin, 1-5% of propanediol, 2-5% of assistant and 10-30% of deionized water. The multifunctional humidifying antimicrobial internal wall paint completely satisfies various indexes specified in GB/T9756-2001, has the effects of temperature control, energy saving, environmental protection, moisture absorption and release, humidification, dewing resistance, air refreshing, no odor, deodorization, bacteria and mold inactivation and the like, and is widely used in inner wall application of habitable rooms, classrooms, offices, hospitals and the like.

A method of controlling the pressure of a casing annulus in a subterranean well that includes injecting into the casing annulus a composition including a base fluid and a polymer coated colloidal solid material. The polymer coated colloidal solid material includes: a solid particle having an weight average particle diameter (d₅₀) of less than two microns, and a polymeric dispersing agent coated onto the surface of the solid particle during the cominution (i.e. grinding) process utilized to make the colloidal particles. The polymeric dispersing agent may be a water soluble polymer having a molecular weight of at least 2000 Daltons. The solid particulate material may be selected from materials having of specific gravity of at least 2.68 and preferably the solid particulate material may be selected from barium sulfate (barite), calcium carbonate, dolomite, ilmenite, hematite, olivine, siderite, strontium sulfate, combinations and mixtures of these and other similar solids that should be apparent to one of skill in the art.

The invention is based on the discovery that modified calcium carbonates can be used as fillers for the preparation of non-abrasive adhesive formulations that are useful in microelectronic applications. The modified calcium carbonate fillers possess functional groups, which form strong bonds to the thermoset matrix. Invention compositions display excellent rheological properties, in addition to a low coefficient of thermal expansion.

A catalyst for preparing low-carbon olefin by catalytic cracking is prepared from alumina, magnesium oxide, sodium vanadate, calcium carbonate, RE metal oxide, kaliophilite or potash feldspar, Cr2O3 and MnO2. Its advantages are high catalytic activity and selectivity, long service life and low reaction temp.

The invention discloses a fire-retardant cable sheath material formulation and the preparation method thereof. The formulation comprises, by weight parts, 15 to 30 parts of chloroprene rubber, 15 to 30 parts of chlorinated polyethylene, 0.5 to 3.0 parts of zinc oxide, 0.5 to 3.0 parts of magnesium oxide, 0.2 to 1.0 parts of ethylene thiourea, 0.5 to 2.0 parts of dibenzothiazyl disulfide, 0.1 to 0.5 parts of tetramethylthiuram disulfide, 0.5 to 2.0 parts of N-phenyl-2-naphthylamine, 0.5 to 2.0 parts of stearic acid, 0.5 to 3.5 parts of paraffin, 1.0 to 5.0 parts of dioctyl phthalate, 5.0 to 15 parts of carbon black with high abrasion resistance, 5.0 to 15 parts of semi-reinforced carbon black, 3.5 to 10 parts of calcium carbonate, 2.5 to 8 parts of bis(pentabromophenyl) ether, 1.0 to 3.0 parts of antimony trioxide, and 1.0 to 8.0 parts of aluminum hydroxide. The preparation method mainly comprises the following steps: plasticating, blending, mixing, thin-passing and calendaring and extruding the sheath.

The invention provides a preparation method for feed without antibiotics. Feed without antibiotics is complete pig feed without antibiotics, which is prepared from alkali protease and fermenting mixing feed of wholesome funguses and contains the wholesome funguses, a complex enzyme, complex organic acid and other microbe metabolites. The preparation method comprises the preparation steps: weighingthe raw materials of the fermenting feed: corn flour, bean dregs, fermenting bean dregs, fish meal and whey mist which are uniformly mixed; weighing immune polysaccharide, edible salt, calcium hydrophosphate, calcium carbonate, lysine, methionine, various vitamins and various minerals which are uniformly mixed; preparing wine making yeast, alkyl producing pseudofilament yeast, lactobacillus acidophilus, bacillus subtilis and bacillus licheniformis which are uniformly mixed; uniformly mixing all the raw materials and the funguses; adding water to the feed; bagging; sealing; fermenting until nogas is generated; discharging air; sealing again; sealing an outer packing bag and labeling to obtain a finished product. The feed without antibiotics prepared by the method has the advantages of good mouth feel, high nutritious value, easy assimilation and wide market prospect.

The invention provides a preparation method for core-shell type silicon dioxide-coated nanometer calcium carbonate, which comprises following steps: adding silicate in calcium carbonate suspension pulp; stirring and mixing using emulsion pump; introducing kiln gas with CO2 for carbonization until the pH is 6.5 to 7.0; heating to 60 to 90 DEG C; adding coating agent for coating treatment; the product is obtained after the coated pulp is filtered and the filter cake is dried. The preparation method for core-shell type silicon dioxide-coated nanometer calcium carbonate has the advantages of improving the acid resistance of nanometer calcium carbonate since silica sol precipitated through hydrolysis is coated on the surface of nanometer calcium carbonate, improving dispersion of the product in polymer due to surface treatment using coupling agent and organic acid, good acid resistance and dispersion, greatly improving physical and chemical properties, and felicitating industrial production with simple operation.

A porous particulate material for treating a fluid containing a contaminant is disclosed. The particulate material comprises a cementitious matrix or binder and treated bauxite refinery residue or red mud. At least a portion of the pores in the particulate material is open cell or interconnected pores. The invention also relates to the use of a reactive permeable barrier comprising porous material, for treating a contaminated fluid. Also disclosed is a method for producing porous particulate material for treating a contaminated fluid and a method for treating a contaminated fluid, in which the porous material is used. The invention furthermore relates to a cementitious composition comprising partially neutralised red mud and cement, wherein the partially neutralised red mud has been pre-treated by contacting it with water having a total hardness supplied by calcium, magnesium or a combination thereof, of at least 3.5 millimoles per litre calcium carbonate equivalent. The cementitious composition is useful as a building and construction material.

The invention discloses a soft ceramic mud and method for preparation, which is prepared by polyvinylchloride pasty resin 15-40 parts by weight, dioctyl phthalate 20-55 parts by weight, calcium carbonate 15-35 parts by weight, plasticizer 0.1-0.4 parts by weight, toner 0.5-0.15 parts by weight, and trace moisture and impurity. The invention also discloses a method for preparation, which comprises steps as follows, each component is weighed proportionally and is placed into stirrer to stir until all components doesn't display nodular powder to be kneaded together evenly and the color is uniform, the evenly stirred mud is placed in the molder to squeeze and mould. The invention provides the soft ceramic mud which is hard and fine in texture under normal temperature, low in softening temperature to soften by hand temperature, low in toasting temperature and short in time, and the toasted material is as hard as ceramic without any odor, further protecting environment.

A low grade fluorite and barite flotation separation method uses waterglass as the inhibitor for silicious mineral and calcium carbonate mineral; uses oleic acid as the collector for fluorite and barite; and uses starch, sodium sulphate, hydrochloric acid and sodium hexametaphosphate as the inhibitor for barite mineral. The invention can perform flotation separation of low grade fluorite and barite effectively; under the condition that the given fluorite grade is 33.92%-40.41%, and the barite grade is 34.67%-35.33%, by mixing, flotation and separation, can achieves the fluorite concentrate with grade of above 95% and recovery rate of 75.5%-78.5%, and the barite concentrate with grade of 92.3%-93.27% and recovery rate of 75.2%-79.73%.

An overbased calcium sulfonate grease composition comprising a reduced amount of overbased calcium sulfonate, added calcium carbonate, base oil, one or more converting agents, and one or more complexing acids if a complex grease is desired. The calcium sulfonate grease composition improves thickener yield and expected high temperature utility as demonstrated by dropping point. The calcium carbonate may be used to react with complexing acids when making a complex grease, such that the addition of calcium oxide or calcium hydroxide is not required. A method of making the composition comprising the steps of mixing the overbased calcium sulfonate and base oil, adding the calcium carbonate, adding one or more converting agents, and adding one or more complexing acids. All or a portion of one or more of the complexing acids may be added with or prior to the one or more converting agents.