53results about How to "Raw materials are environmentally friendly and easy to obtain" patented technology

The invention relates to a preparation method of N,N-dimethylglycine and belongs to the field of chemical engineering. The preparation method comprises the following steps of: preparing N,N-dimethyl amino acetonitrile by taking hydroxyacetonitrile and dimethylamine as raw materials, obtaining an N,N-dimethylglycine crude product by alkalizing the reaction liquid with an inorganic base and neutralizing the reaction liquid with an organic acid on the basis of N,N-dimethyl amino acetonitrile reaction liquid, and finally separating and purifying the N,N-dimethylglycine crude product to obtain the high-quality N,N-dimethylglycine product. The preparation method has the advantages that the raw materials are environmentally-friendly and easily available, reaction conditions are mild, the environmental pollution is little, the after-treatment is simple and easy, the production efficiency is high, and the preparation method is suitable for industrial popularization and application.

The invention discloses an insecticide prepared from active ingredients of ginkgo biloba testa. The insecticide mainly comprises two active ingredients including ginkgolic acid and tartaric acid whichare extracted from the ginkgo biloba testa. By limiting a dosage relationship between the two active ingredients of ginkgolic acid and tartaric acid and regulating and adjusting a pH value of a finally prepared insecticide solution, the prepared insecticide has a significantly enhanced killing effect on plant, fruit and vegetable pests, such as lipaphis erysimi, plutella xylostella, panonychus citri and the like. In addition, the invention also provides a method for preparing the insecticide from the active ingredients of the ginkgo biloba testa, high-purity selective extraction of high-efficiency insecticidal components including ginkgolic acid and tartaric acid from the ginkgo biloba testa can be achieved, and meanwhile protection of bioactivity of ginkgolic acid and tartaric acid in the production process is ensured, so that the highly effective and environmentally friendly organic insecticide is prepared. The method is simple in operation, raw materials are environmentally friendly and easy to obtain, and the formula for preparing a product is simple. In addition, the insecticide has high efficiency, low toxicity, no residues and no pollution and is more conducive to ecological balance protection.

The invention belongs to the technical field of preparation of curing agents, and discloses an epoxy resin water-permeable material curing agent and a preparation method and application thereof. The curing agent is prepared from the following components in percentage by mass: 50-80 percent of ricinoleic acid and / or a polymer thereof, and 20-50 percent of fatty polyamine, alicyclic polyamine or polyoxypropylene polyamine containing a polypropylene oxide chain segment. The curing agent provided by the invention is a waterborne curing agent, has superior curing performance, and can be cured at the room temperature; a cured product has superior water permeability and air permeability, and can be applied to curing of an epoxy water-permeable material to prepare an epoxy ceramic forming mold or an epoxy water-permeable material. A fatty polyamine, polyoxypropylene polyamine or alicyclic polyamine curing agent is modified, so that the curing agent contains hydrophobic long-chain alkyl, hydrophilic hydroxyl, an amino group, acylamino and an ester group, has self-emulsifying performance, and can also be taken as a curing agent; a gap and a channel are formed between the epoxy resin and inorganic filler through a hydrophobic group, so that the obtained epoxy material has superior water permeability and air permeability.

The invention relates to a preparation method of multifunctional silk-containing fabric. Firstly, a dopamine aqueous solution is used to impregnate the silk-containing fabric; secondly, a reducing agent is used to impregnate the silk-containing fabric; and finally, a metallic compound solution is used to impregnate the fabric treated by the reducing agent to prepare the multifunctional silk-containing fabric. The LOI value of the finally obtained multifunctional silk- containing fabric is greater than or equal to 29.1%, the LOI value is greater than or equal to 26.3% after 15 times of washing,the UPF value is greater than or equal to 10.79, and the contact angle is greater than or equal to 128.5 degree. According to the preparation method of the multifunctional silk-containing fabric, thefinally obtained multifunctional silk-containing fabric has excellent flame retardant, washable, ultraviolet resistance and hydrophobic properties through the method that the silk-containing fabric is reduced by adding the reducing agent after the silk-containing fabric is modified by the dopamine. The raw materials of the preparation are environmentally friendly and can be easily obtained, and the method is low in requirements on equipment and has great popularization value.

The invention relates to snowflake candle and a preparation method thereof, and belongs to the field of fine chemical engineering. The snowflake candle comprises a lampwick and a candle body which is mainly made of wax, wherein the wax of the candle body mainly consists of the following raw materials (in percentage by mass): 5-8% of soft wax, 2-5% of a plant additive, 1-3% of fragrance, 0.3-0.8% of pigment, 0.3-0.6% of an antioxidant, 0.4-0.8% of a lubricant and the balance of paraffin. The invention further provides the preparation method of the snowflake candle. The preparation method comprises the following steps: uniformly mixing the raw materials, heating to melt the raw materials, casting, cooling and forming, thereby obtaining a finished product. The snowflake candle provided by the invention is simple in preparation method, relatively low in production cost, good in comprehensive property such as the overall hardness, the surface smoothness, thermal resistance and the like, long-lasting in color and fragrance, good in snowflake effect, attractive in appearance, convenient to use and relatively good in market competiveness, and the raw materials are environmentally friendly and easily available.

The invention discloses white mosquito-repellent incense and a preparation method thereof and belongs to the technical field of mosquito repelling. The white mosquito-repellent incense comprises a mosquito-repellent incense dry body and a mosquito-repellent medicament sprayed on the surface of the mosquito-repellent incense dry body, wherein the mosquito-repellent incense dry body is prepared fromthe following raw materials in percentage by mass: 30-60% of binding and combustion carrier and 40-70% of filler, the binding and combustion carrier is one or more selected from cellulose ether, methylcellulose, hydroxypropyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose, and the filler is selected from bone meal, light calcium carbonate, talcum powder and sweet potato residue powder. The white mosquito-repellent incense disclosed by the invention has the advantages that macromolecular cellulose is adopted for replacing powdered carbon in the traditional mosquito-repellent incense as a combustible component, usage of other bindings such as corn starch is eliminated, and appearance is white. The white mosquito-repellent incense disclosed by the invention has the advantagesthat raw materials are environmentally friendly and available, production technology is simple and product weight and combustion time are stable, and smoke content of the product reaches smoke-free level.

The invention discloses a composite sound insulation board and a production process thereof. The composite sound insulation board is prepared from the following raw materials in parts by weight: 35-40parts of bentonite, 6-15 parts of wood fibers, 5-10 parts of perlite particles, 4-8 parts of activated carbon, 6-11 parts of plant straw powder, 2-5 parts of light calcined magnesia, 3-7 parts of xanthan gum powder, 5-10 parts of expanded vermiculite, 5-7 parts of silica fume, 10-20 parts of polyacrylamide and 5-9 parts of a binder. According to the composite sound insulation board, the characteristics of the bentonite are utilized, common pollutants in air can be adsorbed, and the prepared sound insulation board is good in sound insulation effect, has heat preservation and waterproof performance, is free of radioactive elements and does not generate toxic gas; the composite sound insulation board is simple in preparation process and suitable for industrial mass production; the raw materials are easily available and environment-friendly and accord with the green development trend of China; the composite sound insulation board also has the characteristics of corrosion resistance, moisture resistance, worm damage resistance, no deformation and the like, and can be widely applied to walls, wallboards and sound insulation boards in buildings.

The invention provides a hesperetin cinnamate compound with anti-tumor activity and a synthetic method thereof. The hesperetin cinnamate compound with a novel structure is synthesized by using hesperidin and a derivative thereof, and cinnamate and a derivative thereof as raw materials through simple reactions like hydrolytic desugarization and esterification with DMF as a solvent. The method provided by the invention has the advantages of easily available raw materials, mild reaction conditions, and applicability to industrial production.

The invention provides a super-hydrophobic and antibacterial natural cellulose fabric and a preparation method thereof. The super-hydrophobic and antibacterial natural cellulose fabric specifically comprises a natural cellulose fabric; a polydopamine super-hydrophobic coating is adhered to the surface of the natural cellulose fabric; and an ion chelating layer is adhered between the natural cellulose fabric and the polydopamine super-hydrophobic coating. The method comprises the steps of adding the natural cellulose fabric into an alkali solution, performing heating and stirring, performing water washing for multiple times, and performing airing for later use; and dissolving dopamine in a buffer solution, adding a Cu<2+> / H2O2 oxidation system, performing rapid stirring for full dissolution, immersing the fabric in a dopamine solution, carrying out an oscillating reaction, performing multiple times of washing and drying, immersing the fabric in alkali liquor, performing cleaning, performing treatment in the dopamine solution again, taking out the fabric, and performing full washing and drying. The method is easy to operate and mild in reaction condition; the alkali liquor can be recycled; the main raw materials are environmentally friendly, easy to obtain and low in cost; industrial production is facilitated; and the prepared super-hydrophobic and antibacterial natural cellulose fabric has stable super-hydrophobic and antibacterial effects.

The invention provides a clean liquid fuel and a preparation method thereof. The clean liquid fuel is composed of the following components in percentage by weight: 50-75% of methanol, 10-15% of waste alcohol, 13-35% of water, 0.5-1% of methylbenzene, 0.05-0.1% of n-hexane, 0.05-0.1% of ammonium nitrate, 0.5-1.5% of glycerol, 0.1-0.5% of nitric acid and 0.5-1.5% of acetone. The clean liquid fuel has the advantages of high fuel combustion flame temperature, high fuel value, easily available raw materials, environmental friendliness and cleanness, and low cost.

A hen house manure and dirt deodorant is characterized in that the hen house manure and dirt deodorant mainly comprises Bacillus licheniformis, Bacillus subtilis, highly-active dry yeast, lactic acidbacteria and photosynthetic bacteria, wherein the number of effective viable bacteria in the Bacillus licheniformis, Bacillus subtilis and photosynthetic bacteria is more than 200 millions / g. Above microbial strains are mixed to form a composite microbial agent, and the composite microbial agent is prepared through mixing, by mass, 3.5 parts of the Bacillus licheniformis, 10 parts of the Bacillussubtilis, 12 parts of the highly-active dry yeast, 9.5 parts of the lactic acid bacteria and 15 parts of the photosynthetic bacteria. The deodorant further comprises bean cake powder used as a carriertogether with the composite microbial agent, and the deodorant is prepared from, by mass, 51 parts of the composite microbial agent and 49 parts of the bean cake powder, and is used for the deodorizing treatment of hen house manure and dirt.

The invention relates to the technical field of engineering plastic double-shaft orientated polyvinyl fluoride pipe forming, in particular to a production process of a double-shaft orientated polyvinyl fluoride pipe material. The double-shaft orientated polyvinyl fluoride pipe material is prepared by the following preparation process steps: completely mixing raw materials by a high-speed stirringmachine to a uniformly state, putting the mixture into a low-temperature mixing machine, performing double-shaft orientated forming processing on a base pipe, performing orientated stretching on the processed base pipe blank slowly by virtue of a heating furnace, feeding into a diameter-fixing sleeve after stretching, shaping the pipe material under the action of gas pressure, and cutting, flaringand detecting after shaping. By adoption of the technical scheme, the production process of the double-shaft orientated polyvinyl fluoride pipe material has the following beneficial effects: the quality of products in the production process is guaranteed, the raw materials are environment-friendly and easily available, the production efficiency is improved in the process of processing into the finished products, safety and reliability are achieved, energy is saved and the structure is stable.

The invention provides a magnetic composite oxide La0.7Sr0.3MnO3 / alpha-Fe2O3. Technologies such as fluorescence spectroscopy, ultraviolet-visible diffuse reflection spectrum, X-ray diffraction and thelike are used for characterization, and results show that the magnetic composite oxide La0.7Sr0.3MnO3 / alpha-Fe2O3 has obvious absorption under ultraviolet light and visible light and shows good photocatalytic performance under sunlight, and the magnetic composite oxide can enable the degradation rate of simulated methyl orange wastewater to reach 90% under appropriate conditions; after coking wastewater subjected to biochemical treatment is subjected to sunlight photocatalysis for 2 hours, the biodegradability of the coking wastewater is improved, and after the coking wastewater is continuously subjected to biological treatment, the national coking wastewater discharge standard is reached; and the magnetic composite oxide La0.7Sr0.3MnO3 / alpha-Fe2O3 is an efficient magnetic photocatalyst driven by sunlight and has a wide application prospect in the aspect of organic wastewater treatment.

The invention belongs to the field of ecological building materials, and provides a preparation method of a diatom ooze-artificial sandstone composite plate for ecological decoration. The preparationmethod has the advantages that diatom ooze and a photocatalyst are fixed to form a composite plate by utilizing the laser scanning, welding and foaming and the forming and curing of calcium carbonate,so that the falling of the diatom ooze and the photocatalyst is effectively prevented, and the porous adsorption characteristic of the diatom ooze and the contact area between the photocatalyst and air are better remained; when the diatom ooze-artificial sandstone composite plate is used for the internal decoration, the excellent respiration and humidity adjusting functions are realized, and theindoor heat insulation and isolation properties are realized; the photocatalyst can stably perform the photocatalytic reaction, the function of oxidizing and removing organic volatile matters in the air is realized, and the good function of killing bacteria and viruses exposed in the air is also realized.

The invention discloses multifunctional organic pesticide. The multifunctional organic pesticide comprises, by weight, 20-30 parts of bamboo vinegar, 1-3 parts of allicin oil, 9-11 parts of rotenone, 3-10 parts of auricularia auricular extract, 2-5 parts of defoamer, 3-5 parts of a disintegrating agent, 0.5-1 part of antioxygen and 40-50 parts of water. The multifunctional organic pesticide has the advantages that the bamboo vinegar, the allicin oil, the rotenone and the auricularia auricular extract are adopted, raw materials are easy to obtain, good permeability and absorbability of plants on tissue are achieved, application effect of the pesticide and fertilizer can be improved, application dosage can be reduced, and meanwhile, total nitrogen and available phosphorus content in soil can be increased with the bamboo vinegar.

The invention discloses environment-friendly heat conduction coating material as well as a preparation method and application thereof. The environment-friendly heat conduction coating material is prepared from the following raw materials: 68 to 84 parts of waterborne polyurethane, 4 to 9 parts of caffeic acid, 11 to 16 parts of elaterin, 4 to 8 parts of potassium tetraborate and 6 to 12 parts of zinc sulfate heptahydrate. The environment-friendly heat conduction coating material disclosed by the invention is formed by compounding the waterborne polyurethane, the caffeic acid, the elaterin, thepotassium tetraborate and the zinc sulfate heptahydrate, and the raw materials are easy to obtain and are environment-friendly; a prepared product has higher heat conduction coefficient, is good in heat conduction effect, and also has the advantages of high adhesion fastness, fast drying speed, good scratch resistance, high impact strength, long cold-hot alternating period, good salt frog resistance, good heat resistance and the like; the using range of the product is greatly increased, and the product can be particularly and well used for preparing a heat dissipation coating material for a shell of an electronic product; the preparation method of the product is simple and is beneficial for production.

The invention discloses a fermented bean curd-based porous carbon material. Fermented bean curd taken as a raw material is pre-carbonized to reserve a porous structure formed by fermentation of the fermented bean curd, so as to form a carbon precursor; then, the carbon precursor is subjected to alkali treatment activation and calcination to obtain the fermented bean curd-based porous carbon material, the microstructure of the fermented bean curd-based porous carbon material is in a 3D ant nest shape, and the specific surface area range of the fermented bean curd-based porous carbon material is 3000-4000 m<2>g<-1>; and the fermented bean curd is naturally fermented at low normal temperature. A preparation method of the fermented bean curd-based porous carbon material comprises the following steps: 1) preparing the carbon precursor; and 2) preparing the fermented bean curd-based porous carbon material. When the material is used as a supercapacitor electrode material, the specific capacitance value range is 420-600 F g<-1> when the current density is greater than or equal to 0.5 A g<-1>. The fermented bean curd-based porous carbon material has the following advantages: the fermented bean curd is used as a raw material, and a special microstructure is obtained under the action of gas and microorganisms generated by aging fermentation and does not need to be additionally doped; and the material has high specific surface area, abundant pores and uniform aperture.

The invention discloses a heat preservation and sound isolation wall block with a mutually buckled structure and belongs to the technical field of building materials. A block body is prepared from cement, coal ash, river sand, water, a cement foaming agent and a foam stabilizer through stirring, foaming and molding. Two heat preservation and sound isolation tanks with bottoms are arranged on the top face of the block body in a row in the length direction, and the heat preservation and sound isolation tanks are filled with heat preservation and sound isolation composite materials. A convex portion is formed on one end face of the block body, and a concave portion corresponding to the convex portion in shape is formed in the other end face of the end opposite to the end face with the convex portion. The convex portion and the concave portion are buckled when a wall is built, so that the strength of the wall is enhanced. The heat preservation and sound isolation lightweight aggregate block has high pressure resistance and shear strength and good heat preservation and sound isolation effects, is an ideal material for building various walls, and is particularly suitable for various heat preservation building walls.

The invention discloses a graded core-shell SnO2 microsphere material, which has a graded core-shell structure composed of tin dioxide nanoparticles, the microsphere size is 0.5-1 [mu] m, and the outer layer shell thickness is 40-60 nm. A preparation process comprises the following steps: dissolving a tin salt in water, stirring, sequentially adding glucose and urea, and continuously stirring to form a precursor solution; and carrying out hydrothermal reaction on the precursor solution, and then carrying out centrifugal washing, drying and calcining to obtain the graded core-shell SnO2 microsphere nano material. When being used as a gas sensitive material of a gas sensor, the microsphere material can show excellent gas sensitive response performance, and the related preparation method is environment-friendly, simple to operate, controllable in process and suitable for popularization and application.

The invention discloses a pig manure deodorizing method. The method specifically comprises the following steps: after smashing brown coal, screening particles of which a particle size is 2-3 mm, uniformly mixing with pig manure, and storing airtightly. The beneficial effect is that the pig manure deodorizing method is capable of utilizing the physical adsorption effect of the brown coal, and improving main components for generating foul smell, such as sulfur dioxide, hydrogen sulfide and ammonia nitrogen, released from the pig manure, at the same time humic acid content of the brown coal is high, feces can be used for agricultural field return after adsorption treatment is performed on the feces, and the humic acid content of nutrients in a fertilizer needed by crops is increased. The brown coal is used for performing feces deodorization, and the deodorization and purification effects of the feces can be achieved, thereby a discharge amount of a malodorous gas is effectively inhibited,and a discharge period is shortened. Raw materials used in the pig manure deodorizing method are environment-friendly and easy to obtain, high in performance cost ratio, and apparent in deodorizationeffect.

The invention relates to the field of biological medicine, in particular to application of sulfated glucuronic acid-xylose-rhamnose in enhancing immune function. The glycan is obtained by acidolysis of enteromorpha, and the monosaccharide mainly comprises glucuronic acid (Glca), xylose (Xyl), rhamnose (RHA) and the like. The preparation method comprises the following steps: room-temperature acidolysis, filtration, neutralization and concentration, ethanol precipitation, anion column chromatography, hydrolysis, ethanol precipitation, Bio-Gel P-10 Gel column chromatography, and freeze drying. The glycan prepared by the method has the characteristics of stable performance, low cost, high safety, high medicinal value and the like, and can significantly activate mouse peritoneal macrophages torelease nitric oxide. The glycan can be applied to preparation of medicines and health products of immunopotentiators.

The invention relates to a preparation method of multifunctional silk-containing fabric. Firstly, a dopamine aqueous solution is used to impregnate the silk-containing fabric; secondly, a reducing agent is used to impregnate the silk-containing fabric; and finally, a metallic compound solution is used to impregnate the fabric treated by the reducing agent to prepare the multifunctional silk-containing fabric. The LOI value of the finally obtained multifunctional silk- containing fabric is greater than or equal to 29.1%, the LOI value is greater than or equal to 26.3% after 15 times of washing,the UPF value is greater than or equal to 10.79, and the contact angle is greater than or equal to 128.5 degree. According to the preparation method of the multifunctional silk-containing fabric, thefinally obtained multifunctional silk-containing fabric has excellent flame retardant, washable, ultraviolet resistance and hydrophobic properties through the method that the silk-containing fabric is reduced by adding the reducing agent after the silk-containing fabric is modified by the dopamine. The raw materials of the preparation are environmentally friendly and can be easily obtained, and the method is low in requirements on equipment and has great popularization value.

The invention provides a control panel for injection molding. The control panel comprises the following raw materials in parts by weight: 60-70 parts of PC (polycarbonate) resin, 15-25 parts of a panel filler, 5-11 parts of a metallic oxide and 1-3 parts of a disperse lubricating agent. The control panel has the benefits that the control panel is good in abrasion resistance, flame retardance and aging resistance; in addition, the control panel is relatively high in hardness and relatively good in antibacterial activity, so that the service life of a finished product is prolonged; the used rawmaterials are easily obtained and environmentally-friendly, and the control panel is simple in production steps and low in production cost.

A cement building block formula and a processing method are disclosed, wherein the formula comprises the following components in parts by mass: 30 to 35 parts of cement; 40 to 45 parts of fly ash or 40 to 45 parts of construction waste; 25 to 30 parts of water; 2.15-2.4 parts of a foaming agent aqueous solution with the concentration of 5% and 0.13-0.20 parts of a foam stabilizer aqueous solutionwith the concentration of 10%. The cement, the fly ash, the construction waste, the water, the foaming agent aqueous solution with the concentration of 5% and the foam stabilizer aqueous solution withthe concentration of 10% are heated at the heating temperature 20-25 DEG C, mixed, stirred for stirring time of 6MIN, and cooled after the completion of the heating and stirring to obtain cement building blocks. Advantages are as follows: raw materials are environmentally-friendly and easy to obtain. According to the formula, the building blocks can be directly solidified and formed without high-temperature calcination, the production process is more energy-efficient and environmentally-friendly. The application of the cement ensures the strength and density of the building blocks, and the service life of the blocks is longer.

The invention belongs to the technical field of fracturing fluid additives for increasing production in oil and gas fields, and specifically relates to a degradable drag reducer for fracture and a preparation method thereof. The drag reducer is prepared from the following raw materials in percentage by weight: 2-5% of a water-soluble polymer, 10-15% of a surfactant, 8-10% of organic solvent, 0.1% of aldehydes and the balance of water. The water-soluble polymer is polyacrylamide, polyvinyl alcohol or any one of a mixture of polyacrylamide and polyvinyl alcohol in proportion ranged from 1:1 to 1:2. The organic solvent is any one of methanol or ethanol. The aldehyde is formaldehyde, oxalaldehyde or any one of a mixture of formaldehyde and oxalaldehyde in proportion ranging from 1:1 to 1:2. The drag reducer has the advantages that the drag reducer is good in resistance dimishing performance and heat stability; after fracturing construction, the residual drag reducer in the well can be degraded by microorganisms; the pollution to the stratum is avoided.

The invention belongs to the field of ecological building materials, and provides a preparation method of a diatom ooze-artificial sandstone composite plate for ecological decoration. The preparationmethod has the advantages that diatom ooze and a photocatalyst are fixed to form a composite plate by utilizing the laser scanning, welding and foaming and the forming and curing of calcium carbonate,so that the falling of the diatom ooze and the photocatalyst is effectively prevented, and the porous adsorption characteristic of the diatom ooze and the contact area between the photocatalyst and air are better remained; when the diatom ooze-artificial sandstone composite plate is used for the internal decoration, the excellent respiration and humidity adjusting functions are realized, and theindoor heat insulation and isolation properties are realized; the photocatalyst can stably perform the photocatalytic reaction, the function of oxidizing and removing organic volatile matters in the air is realized, and the good function of killing bacteria and viruses exposed in the air is also realized.

The invention relates to snowflake candle and a preparation method thereof, and belongs to the field of fine chemical engineering. The snowflake candle comprises a lampwick and a candle body which is mainly made of wax, wherein the wax of the candle body mainly consists of the following raw materials (in percentage by mass): 5-8% of soft wax, 2-5% of a plant additive, 1-3% of fragrance, 0.3-0.8% of pigment, 0.3-0.6% of an antioxidant, 0.4-0.8% of a lubricant and the balance of paraffin. The invention further provides the preparation method of the snowflake candle. The preparation method comprises the following steps: uniformly mixing the raw materials, heating to melt the raw materials, casting, cooling and forming, thereby obtaining a finished product. The snowflake candle provided by the invention is simple in preparation method, relatively low in production cost, good in comprehensive property such as the overall hardness, the surface smoothness, thermal resistance and the like, long-lasting in color and fragrance, good in snowflake effect, attractive in appearance, convenient to use and relatively good in market competiveness, and the raw materials are environmentally friendly and easily available.

The invention provides a self-thermal insulation fireproof building block formula, and belongs to the field of building materials. The building block is composed of the following raw materials in percentage by weight: 40 to 45.5% of cement, 11.4 to 17% of mineral powder, 11.4 to 17% of river sand, 26% of water, 2.3 to 2.6% of a foaming agent water solution with a concentration of 10%, and 0.13% of a foam stabilizing agent water solution with a concentration of 10%. The building block is prepared by the following steps: mixing the raw materials together, stirring, foaming, moulding, cutting, drying by wind, and curing so as to obtain the finished product. A foaming stabilizing agent is added, so the generated bubbles will not be broken easily during the production process and are evenly distributed in the moulded building blocks, and thus a better heat insulation and fireproof effect will be achieved.