221 results about "Silicate minerals" patented technology

The invention relates to a high-strength stable solid waste-based composite cementing material and a preparation method and application thereof in the field of building materials. The high-strength stable solid waste-based composite cementing material is prepared from the following raw materials in parts by weight: 70-85 parts of composite solid waste micro powder; 10 to 20 parts of Portland cement clinker; 3-8 parts of a composite activator; 0.5 to 2 parts of a nano-scale function regulator; wherein the composite solid waste micro powder is prepared by mixing and grinding the following raw materials in parts by weight: 40-60 parts of blast furnace slag powder; 20 to 30 parts of fly ash; 10-20 parts of chemically modified electrolytic manganese residue powder; and 5-15 parts of steel slag powder. According to the preparation method, sodium metasilicate is adopted to assist medium-temperature calcination to chemically modify the electrolytic manganese residues, so that not only is the gelation activity of the electrolytic manganese residues effectively excited, but also free-state manganese, cadmium and other heavy metal ions in the electrolytic manganese residues are fixed in situ in newly formed zeolite-like silicate mineral lattices through thermochemical reconstruction; and a brand new technical path is opened up for safe and high-value utilization of the typical hazardous waste, namely the electrolytic manganese residues.

The invention relates to the technical field of agricultural fertilizers, and particularly discloses a magnesium aluminum silicate mineral derived layered magnesium aluminum bimetallic oxide-silicon oxide composite material as well as a preparation method and application of the magnesium aluminum silicate mineral derived layered magnesium aluminum bimetallic oxide-silicon oxide composite material. Magnesium / aluminosilicate minerals are successfully converted into the layered magnesium-aluminum bimetal oxide-silicon oxide composite material with a high specific surface area and a developed pore structure, and the layered magnesium-aluminum bimetal oxide-silicon oxide composite material is combined with nutrients through a simple and convenient fertilizer preparation process to prepare the slow-release fertilizer. The slow-release fertilizer has the advantages of cheap and easily available raw materials, simple and efficient preparation process, stable slow-release performance, soil improvement effect and the like, and provides an efficient and environment-friendly new way for development of the slow-release fertilizer; the method has important significance for promoting sustainable agricultural development and realizing high-value utilization of silicate minerals in the agricultural field.

A dry biocidal absorbent composition comprises an interspersed mixture of a dry absorbent silicate mineral material and a dry biocide. The absorbent silicate mineral material may comprise expanded perlite and / or exfoliated vermiculite. The biocide may comprise sodium dichloroisocyanurate or a hydrate thereof. The composition may be used for cleaning up a bodily spill from a floor or other surface.

The invention discloses a multi-element combined collecting agent and application of the multi-element combined collecting agent in low-grade lepidolite flotation, and belongs to the technical field of mineral processing. The multi-element combined collecting agent is composed of the cationic amine collecting agent, the anion accelerant and the long-chain anion collecting agent, the reaction activity of the collecting agent and the capturing behavior on mineral particles are remarkably improved in the flotation process, the foam viscosity is reduced, the fluidity is improved, and the flotation efficiency is improved. The method effectively solves the problems that foam is too stable and different silicate minerals are difficult to float and separate under the acidic condition, reduces environmental pollution and equipment corrosion, further strengthens the hydrophobic floating behavior on the surface of lepidolite, enables the grade of obtained concentrate Li2O to be high, and further realizes clean recycling of low-grade lepidolite resources.

The invention relates to the technical field of mineral materials and nano-enzyme catalysis, in particular to an iron-containing layered silicate mineral nano-enzyme as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ball milling on the iron-containing layered silicate mineral, carrying out centrifugal washing, and drying to obtain the iron-containing layered silicate mineral nano-enzyme. According to the method, silicate minerals with a layered structure and rich iron content are adopted as raw materials, the ball-milled layered silicate mineral nano-enzyme is successfully prepared through a ball milling method, the crystallinity of the minerals is reduced, the surface acidity of the minerals is improved, and low-spin iron is generated, so that the affinity of the ball-milled minerals to H2O2 is enhanced; h2O2 is catalyzed to generate singlet oxygen and superoxide free radicals, so that the peroxidase-like activity of the ball-milled minerals is improved. The enzyme-like activity is improved by 10 times, high catalytic activity can still be kept under the neutral condition, and the method can be used for colorimetric sensing and antibacterial application of small biological molecules such as glucose, hydrogen peroxide and glutathione.

The invention provides a mixed type shield synchronous grouting material and a grouting process, and relates to the technical field of building materials, the grouting material is composed of fast hydration Portland cement, activated aluminosilicate minerals, nanometer silicon powder, bentonite, a reversible thixotropic polymer, a delayed hydration agent, coated calcium aluminate fast setting powder and a coated silicate gel precursor. The early-stage reaction is inhibited by delaying hydration, and a controllable solidification sequence of slurry from a flowable stage, a rearrangement structure stage to a rapid solidification stage is realized by breaking a membrane under the action of temperature or pressure gradient. In the process, by monitoring the conductivity, the concentration of Ca < 2 + > / Mg < 2 + > and the temperature in real time, the adding amount of an additive and grouting parameters are automatically adjusted, so that the stable diffusivity of the material is kept and the curing speed is accelerated under different stratum conditions. The solidified body forms a C-S-H, C-A-S-H and N-A-S-H gel interpenetrating network, the permeability coefficient is low, the water dispersion resistance is high, and the shield grouting quality and the tunnel structure safety can be remarkably improved.

The invention discloses an iron-based layered silicate material for efficiently removing variable-valence heavy metals and water treatment application of the iron-based layered silicate material, and belongs to the technical field of water treatment.The preparation method of iron-containing layered silicate minerals comprises the following steps that ferrous sulfate heptahydrate is dissolved in water, sodium dithionite and sodium orthosilicate are sequentially added, stirring is conducted, and a mixture is obtained; stirring, homogenizing and aging for two hours; the hydrothermal reaction kettle is used for reacting in a high-temperature and high-pressure environment; according to the iron-containing layered silicate mineral material, a unique layered structure similar to natural iron-containing layered silicate minerals and high adsorption performance are reserved, variable-valence heavy metal arsenic in a wastewater solution is synergistically and efficiently removed by means of the oxidation-reduction activity of the iron-containing layered silicate mineral material and induction of generation of Fenton-like reaction, and the iron-containing layered silicate mineral material is obtained. The method disclosed by the invention shows high treatment efficiency, environmental friendliness and remarkable economic benefits, and is expected to exert remarkable environmental benefits in the field of water treatment.

The invention discloses a granular soil conditioner capable of improving acid and passivating aluminum and a preparation method of the granular soil conditioner, and belongs to the technical field of soil improvement. The invention provides a preparation method of a granular soil conditioner for modifying acid and passivating aluminum. The preparation method comprises the following steps: uniformly mixing alkaline phosphate tailing powder, silicon-based yellow phosphorus slag powder, silicate minerals and a carbon source conditioner to obtain a mixed powder material; the mixed powder material is soaked in an alkali solution for alkali modification treatment, and an alkali modified conditioner is obtained; soaking the alkali modified conditioner in a chitosan solution, and reacting to enable functional groups of chitosan to be attached to the surface of the alkali modified conditioner, so as to obtain a chitosan modified conditioner; and adding a binder into the chitosan modified conditioner, and granulating to obtain the acid-modified aluminum-blunt granular soil conditioner. The granular soil conditioner provided by the invention can be used for effectively improving acid soil and has relatively high capability of passivating aluminum.

The invention discloses a fracturing imbibition system for refracturing a low-permeability tight oil reservoir and a preparation method of the fracturing imbibition system, and belongs to the technical field of fracturing fluids, the fracturing imbibition system comprises: an acid liquid base fluid: hydrochloric acid, hydrofluoric acid, EDTMPS and deionized water; an amphoteric betaine viscoelastic surfactant; biologically modifying the nanoparticles; a Gemini cationic surface active agent; a corrosion inhibitor; and an organic silicon defoaming agent and a fluorocarbon discharge aiding agent. According to the fracturing imbibition system, through the integrated design of the multifunctional surfactant, the problems that a traditional acid fracturing fluid is insufficient in silicate mineral dissolving capacity, high-temperature viscosity is attenuated, and corrosion inhibitor dependence is caused are solved.

The invention aims to provide an inhibitor for reverse flotation of micro-fine-particle hematite and a use method of the inhibitor, aiming at the problem that the micro-fine-particle hematite cannot be effectively inhibited by an existing iron ore reverse flotation process technology. According to the inhibitor, AMPS (2-acrylamido-2-methylpropanesulfonic acid) is subjected to chemical modification in a weakly alkaline solution, a product AMPS (OH <->) is generated, then in hematite flotation operation, the hydrophilicity of micro-fine particle hematite is improved, the flotation performance difference of hematite and silicate minerals is effectively increased, and efficient removal of the silicate minerals is facilitated. In addition, the modified inhibitor AMPS (OH <->) has the characteristics of strong selectivity, small dosage, simple preparation and the like, and can effectively reduce the content of silicon in the flotation concentrate of the micro-fine particle hematite, improve the yield and the recovery rate of the flotation concentrate and realize the target of efficient impurity removal of the micro-fine particle disseminated hematite.

The invention discloses a ZTA ceramic interbody fusion cage and a preparation method and application thereof.The ZTA ceramic interbody fusion cage is composed of a compact outer wall and a porous interior, and the porous interior is of a gradient porous three-period minimal curved surface structure; the ZTA ceramic interbody fusion cage is made of a calcium magnesium silicate mineral / ZTA composite ceramic material, and the preparation process of the ZTA ceramic interbody fusion cage comprises the following steps: preparing ceramic powder and a photosensitive raw material according to a design ratio, mixing the materials to obtain ceramic slurry, adding the ceramic slurry into light-curing printing equipment, carrying out light-curing printing according to a ZTA ceramic interbody fusion cage model to obtain a ceramic biscuit, and sintering the ceramic biscuit to obtain the ZTA ceramic interbody fusion cage. The ceramic biscuit is degreased and sintered, and the ZTA ceramic interbody fusion cage is obtained.The gradient bionic structure interbody fusion cage has the advantages of being matched with autogenous bones in mechanical property, adjustable in performance, good in biocompatibility, good in bone induction performance and the like.

The invention relates to the technical field of soil improvement, and discloses a soil improvement fertilizer and application thereof in saline-alkali soil improvement, a preparation method of the soil improvement fertilizer comprises the following steps: mixing cow dung, chicken manure and straw, and carrying out anaerobic fermentation to obtain an organic fertilizer; mixing soybean, corn and seaweed, performing enzyme catalysis treatment, and extracting to obtain an amino acid liquid fertilizer; soaking brown algae in hot water, filtering and concentrating to obtain a seaweed extract; uniformly mixing silicate minerals, natural gypsum powder, the organic fertilizer, the amino acid liquid fertilizer and the seaweed extract, and sequentially drying and crushing to obtain the soil improvement fertilizer. According to the soil improvement fertilizer disclosed by the invention, various components such as the organic fertilizer, the amino acid liquid fertilizer, the seaweed extract, the silicate minerals and the gypsum powder are meticulously proportioned, so that the soil fertility can be remarkably improved, the soil structure is optimized, the growth of plant root systems is promoted, the stress resistance of plants is enhanced, and the sustainable utilization of soil is improved for a long time.

The present invention provides an eco-friendly, biodegradable, controlled-release pesticidal composition, comprising particular essential oils acting in synergy, adsorbed onto a silicate mineral carrier and embedded within a polysaccharide matrix, which is effective in suppressing nematode populations and enhancing plant health and growth, and methods of use.

The application discloses a kind of multi-element combination collector and its application in low-grade lepidolite flotation, belong to mineral processing technical field.The multi-element combination collector provided by the application is composed of cationic amine collector, anionic promoter and long-chain anionic collector, which significantly improves the reaction activity of the collector and the capture behavior of the mineral particles during the flotation process, reduces the foam viscosity and increases the fluidity, effectively solves the problem of overstable foam and the difficulty of flotation separation of different silicate minerals under acidic conditions, reduces environmental pollution and equipment corrosion, and also strengthens the hydrophobic floating behavior of lepidolite surface, resulting in high grade Li2O concentrate, further realizing the clean recycling of low-grade lepidolite resources.

The invention provides a polycarbonate resin composition that is excellent in flowability and heat resistance and has a low linear expansion coefficient. The invention is a polycarbonate resin composition including, per 100 parts by weight of a component including 20 to 90 parts by weight of (A) a polycarbonate-based resin (component A) and 80 to 10 parts by weight of (B) an ABS resin (component B), 5 to 45 parts by weight of (C) a silicate mineral (component C). The polycarbonate resin composition is characterized in that the component B has an SO42- content of 1 ppm or more and a PO43- content of less than 1.5 ppm.

The invention discloses a method for synthesizing a high-crystallinity zeolite molecular sieve through in-situ crystallization of aluminosilicate minerals, and belongs to the technical field of zeolite molecular sieve synthesis. The preparation method comprises the following steps: preparing a crystal nucleus liquid containing zeolite molecular sieve microcrystals and a solid-phase wafer; mixing aluminosilicate minerals with the crystal nucleus liquid, and respectively roasting at 850-1000 DEG C and 650-800 DEG C to prepare an active mineral silicon source and an active mineral aluminum source; and mixing the active mineral source with additional silicon species, NaOH, a template agent, a crystal nucleus liquid, a solid-phase wafer and water, crystallizing at 90-150 DEG C, and post-processing to obtain the high-crystallinity zeolite molecular sieve. By introducing the crystal nucleus liquid and the solid-phase wafer, silicon and aluminum components in the aluminosilicate mineral are promoted to be converted into the target molecular sieve in situ, the crystallinity of the product is remarkably improved, the synthesis cost is reduced, and the method is suitable for the fields of petrochemical engineering, environmental protection and the like.

The invention discloses a method for separating aluminosilicate minerals and purifying quartz sand under a neutral condition and application of the method. The method for separating the aluminosilicate minerals and purifying the quartz sand under the neutral condition adopts one or more reverse flotation operation, and the reverse flotation operation comprises the following steps: adding a quartz inhibitor into quartz raw sand ore pulp or high-quality quartz sand ore pulp with low aluminum content obtained by the last reverse flotation operation, and uniformly mixing; then adding an aluminosilicate mineral collecting agent, and uniformly mixing; then adding a foaming agent under the condition of air-blowing stirring, carrying out quartz reverse flotation, and keeping stirring and scraping bubbles during the process; and after the reverse flotation is finished, washing the residual ore pulp to obtain high-quality quartz sand with low aluminum content. The reverse flotation technology is carried out under the neutral condition, traditional strong acid and strong alkali are prevented from being used, and therefore the harm of the purification technology to production equipment, the ecological environment and operators is reduced.

The invention relates to the technical field of water treatment, in particular to a magnetic biological flocculant, a preparation method of the magnetic biological flocculant and application of the magnetic biological flocculant in retention of emerging pollutants. According to the magnetic biological flocculant provided by the invention, an initial oxygen mineral on the earth is used as a body nano mineral, a binary wet ball milling method is adopted to prepare a sub-nano mixed mineral, then the sub-nano mixed mineral is subjected to ultrasonic treatment and solid-liquid separation, and then reduction roasting is performed to obtain a sub-nano zero-valent complex mineral; then, mixing the sub-nanometer zero-valent complex minerals with silicate minerals and lotus leaf powder, and embedding by using marine animal mucus, so as to prepare the magnetic biological flocculant. The surface of the magnetic biological flocculant is rich in a large number of hydroxyl functional groups, the reaction activity is high, marine animal mucus can be effectively prevented from going bad, and efficient retention of emerging pollutants is achieved. In addition, the magnetic biological flocculant is non-toxic and harmless, and the potential risk to the environment is eliminated.

A treatment agent for acidic fluorine-containing wastewater and a method for using the same. The treatment agent for acidic fluorine-containing wastewater of the present invention comprises an agent A and an agent B; the agent A comprises carbonate minerals and silicate minerals; the agent B is mainly aluminum salt. The method for using the treatment agent for acidic fluorine-containing wastewater of the present invention comprises the following steps: (1) pretreatment: sedimentation filtration to remove suspended solids; (2) pH adjustment: adding agent A to the acidic fluorine-containing wastewater to make the solution pH 6.5-7.5; (3) coagulation precipitation: adding agent B to the solution, standing and precipitating after reaction, and the supernatant is discharged. The use of the treatment agent for acidic fluorine-containing wastewater of the present invention can effectively improve the acid-base buffering capacity of the water quality, and spontaneously stabilize the pH to 6.5-7.5, with high fluorine removal efficiency. It can also improve the sedimentation efficiency of the fluorine removal alum flower, avoid the use of polyacrylamide, and the treatment process is simple and low-cost.

A mechanochemically activated material obtainable by a process for the mechanochemical activation of kaolinite-poor starting materials, the process comprising the following steps: a) providing a solid starting material comprising a phyllosilicate mineral, the starting material having a kaolinite content of less than 50 wt% as determined by XRD, preferably less than 20 wt%, more preferably less than 10 wt%; b) providing a gas; c) introducing the feedstock and the gas into a mechanical agitation unit; and d) subjecting the starting material to mechanical agitation in the presence of the gas in the mechanical agitation unit; wherein the phyllosilicate mineral is selected from the kaolinite group, serpentinite group, mica group, chlorite group and combinations thereof, wherein the mechanochemically activated material has a Strength Activity Index (SAI) at Day 28 of at least 110%, the SAI being determined in accordance with ASTM C311 / C311 M-22.

The invention discloses a combined flotation reagent for fluorite associated beryllium ore and a beneficiation method, and belongs to the technical field of beneficiation. The flotation reagent comprises a beryllium mineral collecting agent and a regulator; the beryllium mineral collecting agent is formed by assembling metal ions with the valence higher than bivalent, C5-C9 alkyl hydroximic acid and fatty acid in a coordination mode. The adjusting agent comprises organic phosphonic acid, alkylol amine and sodium sulfide, the beryllium mineral collecting agent is a ternary coordination colloid collecting agent and can achieve targeted adsorption and synchronous flotation recovery of multiple beryllium-containing minerals, and the adjusting agent has a high-selectivity inhibition effect on gangue minerals such as calcium-containing minerals and silicate minerals; the combined flotation reagent is small in dosage, low in cost, short in beneficiation process, easy to operate and high in applicability, and the comprehensive recovery rate of the fluorite associated beryllium ore can be remarkably increased.

The application discloses a method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions and application thereof. The method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions adopts one or more times of reverse flotation operations, and the reverse flotation operation comprises the following steps: adding a quartz depressor into quartz raw sand slurry or low-aluminum-content fine quartz sand slurry obtained through previous reverse flotation operation and mixing; then adding an aluminosilicate mineral collector and mixing; subsequently, adding a foaming agent under the condition of air agitation and stirring, and performing quartz reverse flotation, during which, stirring is kept and bubbles are scraped; and finally, washing the remaining slurry to obtain low-aluminum-content fine quartz sand. The reverse flotation process of the application is performed under neutral conditions, avoids the use of traditional strong acid and strong alkali, and further reduces the harm of the purification process to production equipment, ecological environment and operating personnel.

The invention discloses an amorphous tailing-based cadmium-arsenic synchronous adsorption material as well as a preparation method and application thereof. The method comprises the following steps: firstly, uniformly mixing tailings with alkali metal, calcining, washing and drying to obtain amorphous tailings; and then the amorphous tailings and a metal ion solution are mixed, a reducing agent is dropwise added for a reduction reaction, and the amorphous tailing composite material loaded with the nanometer zero-valent metal is obtained. The chain structure of silicate minerals in the tailings can be effectively destroyed through amorphization treatment, a large number of silicon atoms are promoted to be released, the crystal structure of the tailings is disintegrated, a multi-pore-channel structure is formed on the surface, and the specific surface area of the tailings and the adsorption capacity of the tailings to cadmium ions are improved; meanwhile, nano zero-valent metal is introduced to the surface of the amorphous tailings, so that the adsorption performance of the amorphous tailings to arsenic is improved; the finally prepared composite material has efficient adsorption performance and good magnetic recovery characteristic on cadmium and arsenic, and the whole preparation process is simple, convenient and feasible, and can be used for large-scale production.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.

The invention discloses a method for recovering fine-crushed gold-loaded resin from gold ore leaching residues, and belongs to the technical field of mineral processing. The invention provides an efficient recovery method aiming at the problem of resource waste caused by loss of fine-crushed gold-loaded resin along with leaching residues in the gold extraction process of a resin ore pulp method. The gold ore tailings mainly comprise silicate minerals such as quartz, feldspar and mica, the granularity is fine, and the viscosity of ore pulp is high. The method comprises the following steps: carrying out size mixing and dispersion pretreatment on the tailings containing the fine-crushed gold-loaded resin; gold-bearing resin rough concentrate is obtained through screening and grading; the rough concentrate is subjected to desliming pretreatment; the deslimed materials are subjected to dense medium separation and concentration, and efficient separation is achieved through the density difference between resin and gangue minerals; and finally, the obtained gold-bearing resin concentrate is subjected to medium drainage washing. The sorting technology adopted by the invention has the advantages of high separation precision, strong adaptability and the like, can realize efficient recovery of fine-crushed gold-loaded resin from a complex tailing system, and has remarkable economic benefits and environmental benefits.

The invention relates to a method for selectively extracting lithium from clay lithium ore, in particular to the field of lithium extraction.The method comprises the steps that clay lithium ore powder is roasted and activated to obtain roasted ore powder; and mixing the obtained roasted mineral powder with a calcium leaching aid, carrying out water leaching, and carrying out solid-liquid separation to obtain a lithium extracting solution and filter residues. According to the method provided by the invention, the clay type lithium ore is firstly subjected to roasting activation treatment, and ore phase activation conversion of the clay type lithium ore is realized in the high-temperature roasting process, so that the lithium-containing minerals such as kaolinite, lithium chlorite and montmorillonite are subjected to hydroxyl removal and are converted into structures with high leaching activity; the clay lithium ore subjected to high-temperature roasting is subjected to water leaching by adopting a calcium leaching aid, the structure of aluminosilicate minerals is destroyed in a weakly alkaline environment, so that lithium in crystals is released, and meanwhile, impurity elements such as aluminum, silicon, magnesium and iron are fixed in a slag phase, so that efficient selective leaching of lithium is realized.

Disclosed are a far-infrared emitting material and its preparation method. The far-infrared emitting material includes zirconium monoxide and at least one natural silicate mineral soil; the far-infrared emitting material and its preparation method use at least two of the above materials as raw materials, which are mixed according to a specific proportion, sintered, and crushed into granules. In the preparation method, the material is sintered within a temperature range of 1100-1250°C and evenly mixed to form a slurry by a ball mill. The slurry is dispersed by adding an additive when needed and finally sifted, baked, dried to form a dry powder which is sifted to form a far-infrared emitting material with high emissivity and wide wavelength in the range of 8-20 µm.

The invention discloses a composite sensing material as well as preparation and application thereof in liquid food spoilage monitoring. The material is of a metal oxide semiconductor / layered silicate mineral and wax integrated structure, and comprises a heterojunction sensitive layer formed by compounding metal oxide semiconductor nanoparticles and layered silicate minerals, and a wax super-hydrophobic protective layer coating the surface of the heterojunction sensitive layer. The preparation method comprises the following steps: dispersing the two raw materials into suspension liquid, coating the suspension liquid on an electrode to form the sensitive layer, and then coating and curing the wax material to form the protective layer. According to the material, the room-temperature gas-sensitive activity is enhanced through the heterojunction, meanwhile, the super-hydrophobic wax layer is used for resisting high humidity and liquid pollution, and function synergy is achieved. The obtained material is high in sensitivity and quick in response to decay mark gases such as ammonia gas and hydrogen sulfide at room temperature, and has excellent environmental interference resistance. The method is simple in process, low in cost, high in environmental adaptability, capable of being integrated in liquid food packaging, capable of achieving real-time in-situ monitoring of the decay process and wide in application prospect.

A copolyester composition comprising a metal phosphinate flame retardant, an acrylic silicone impact modifier, and a silicate mineral, which provides high tensile and / or flexural modulus while maintaining thermal and impact properties and having improved flame retardant properties, a method for manufacturing the copolyester composition, and an article manufactured from the copolyester composition are provided.