5054 results about "Sodium dodecyl sulfate" patented technology

The present invention provides novel insecticidal formulations comprising an effective concentration of: 1) at least one or more essential oils and an insecticidal soap; 2) at least one or more essential oils, an insecticidal soap, and pyrethrins; 3) at least one or more essential oils and pyrethrins; 4) at least one or more essential oils, an insecticidal soap and a synergist, such as sodium lauryl sulfate, sodium dodecyl sulfate or lecithin; 5) at least one or more essential oils, an insecticidal soap, a synergist, and pyrethrins; and 6) at least one or more essential oils, a synergist, and pyrethrins. A carrier oil, such as mineral oil, may be added to any of the foregoing formulations.

The invention discloses a coal slime flotation collector and a preparation method thereof. The coal slime flotation collector comprises the following matters in percentage by weight: 20-50 percent of kerosene and / or light diesel oil, 1-5 percent of primary emulsion, 0.006-0.015 percent of auxiliary emulsion and the balance of water; wherein the primary emulsion is a mixture of polyoxyethylene sorbitan fatty acid ester and dehydrated sorbitol fatty acid ester, and the hydrophile-lipophile balance (HLB) value of the primary emulsion is within 12.8-14.3; the auxiliary emulsion is selected from the following (1) or (2), wherein the (1) is sodium dodecyl benzene sulfonate, and the (2) is a mixture obtained by mixing fatty alcohol polyoxyethylene ether sulfate and the sodium dodecyl benzene sulfonate according to the mass ratio of 1: 0.5-2. The coal slime flotation collector has good stability, simple preparation process and 40-60 percent of the oil-saving ratio on the premise of improving the float yield and the tail coal ash proportion. The collector is beneficial to saving the energy, reducing the emission and improving the economical benefit when being used for floating the coal slime.

A device for controlling blood-feeding insects is disclosed. The device includes a membrane containing a solution suitable for consumption by blood-feeding insects wherein the solution is comprised of a base, the base selected from the group consisting of up to 70 wt % NaCl in water, phosphate buffer, citric acid in water, and sodium lauryl sulfate in water,; and wherein the solution has a pH of between about 6 and 8. An additional active ingredient may be added to the solution. The solution may be referred to as liquid bait. The membrane is suitable for blood-feeding insects to pierce or puncture in order to feed. A method of exterminating or controlling blood feeding insects is also disclosed along with novel bait solutions.

The component of the paper soap include carboxymethyl cellulose sodium, fatty alcohol polyioxymethyl ethyleneethere sodium sulfate, sodium dodecyl benzene sulfonate, lauryl sodium sulfate, cocinin diethanolamide, nonly phenol polyoxyethyleneether, glycerine, quaternary ammonium salt and citric acid. Its preparation includes preparing carboxymethyl cellulose sodium mother liquor, adding the mixed solution of other components to prepare solution through stirring, spraying the prepared solution of PVC plate and drying in a sealed room and moisture extract at 35-40 deg.c to form film.

A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule involves adding an ion pair to the mixtures in an amount effective to inhibit formation of the hydrocarbon hydrates under conditions otherwise effective to form the hydrocarbon hydrates in the absence of the ion pair. In one non-limiting embodiment of the invention the ion pair includes a cationic component that may be a quaternary ammonium compound or an onium compound and a non-cationic counter-ion component that could be an anionic compound, a non-ionic compound and / or an amphoteric compound. Two specific, suitable non-cationic counter-ion components include sodium dodecyl sulfate and ammonium alkyl ether sulfate.

A soap paper contains the polyvinyl alcohol resin as carrier, soap prepared from coconut oil and sodium laurylsulfate, the malic acid and tartaric acid for regulating pH value to become slight acidic, and the lanolin and glycerine for moistening skin.

The invention discloses a micro-foam drilling fluid. The micro-foam drilling fluid comprises the following compositions: 40 to 50 grams of bentonite, 3 to 5 grams of composite foaming agent, 2 grams of xanthan, 3 grams of high-viscosity carboxymethyl cellulose, 3 grams of sodium carbonate, 2 to 3 grams of strong zwitterionic coating agent, 5 grams of partially-hydrolyzed polyacrylonitrile ammonium salt, 5 grams of organic silicon humic acid kalium, 5 grams of lignite resin and 1 grams of viscosity reducer for the drilling fluid in each liter of the drilling fluid, wherein the composite foaming agent consists of lauryl sodium sulfate and sodium dodecyl benzene sulfonate according to mass ratio of 7:3. The drilling fluid has low density, good shielding effect and remarkable anti-leaking effect of a low-pressure easy-to-leak layer and can effectively improve the quality of well cementation.

The invention relates to a preparation method and an application of a selenium-enriched foliar fertilizer. The preparation method comprises the steps as follows: the selenium-enriched foliar fertilizer is prepared by sodium selenate, sodium selenite, fulvic acid, urea, compound sodium nitrophenolate, SDS (sodium dodecyl sulfate) and the balance water; and the sodium selenate and the sodium selenite are taken as donors of selenium, the fulvic acid is taken as a chelating agent, the compound sodium nitrophenolate is taken as a plant growth regulator, and the fertilizer is compounded by adding the plant growth regulator compound sodium nitrophenolate and the urea and the SDS. The selenium-enriched foliar fertilizer is mainly used for crops such as wheat, corn, tomatoes, muskmelons, sugar beet, red dates, walnuts, apples, bergamot pears and the like, and can provide the selenium element for the crops and improve the selenium contents in the crops. The selenium contents of the crops are improved by 128.6-275.0% while compared with those of crops without using the selenium-enriched foliar fertilizer.

The invention provides a method for preparing isotropic superelastic graphene gasgel. The method comprises the following steps: firstly, stirring and mixing an oxidized graphene aqueous dispersion, a reducing agent and sodium dodecyl sulfate (SDS) at low speed, and then stirring at high speed; heating, freezing, melting at room temperature, washing with ethanol and drying at atmospheric pressure to obtain the isotropic superelastic graphene aerogel. The method provided by the invention has the advantages of simple process and is suitable for industrial production, and the obtained graphene aerogel is isotropic, has uniform cell size, and has excellent compression recovery and good electrochemical performance.

The invention discloses an environment-friendly efficient filter filtering paper. The environment-friendly efficient filter filtering paper is prepared by the following raw materials in part by weight: 40-50 parts of softwood pulp, 30-40 parts of waste paper pulp, 20-30 parts of high-silica glass fiber, 2-5 parts of modified vermiculite, 1-3 parts of zeolite molecular sieve, 2-4 parts of nanometer calcium, 1-2 parts of modified pulverized fuel ash, 2-3 parts of water-solubility organic silicon resin emulsion, 1-2 parts of water-solubility polytetrafluoroethylene emulsion, 0.5-0.8 parts of ammonium polyphosphate, 3-4 parts of glycerol triacetate, 0.5-1 parts of diethanolamide, 0.5-1 parts of silane coupling agent KH560, 0.4-0.8 parts of sodium dodecyl sulfate, 0.5-1 parts of antioxidant DSTP, and 4-6 parts of polyethylenimine. The filtering paper prepared by the method provided by the invention has the advantages of being good in water permeability, large in filtering area, small in maximum diameter of hole, high in filtering precision, strong in bursting strength, high-temperature-resistant, good in water resistance and the like, can achieve the filtering efficiency by 99.98%, has stable performance index at atmospheric and high-temperature working conditions, as well as better temperature resistance and filtering effects.

The invention relates to a bacteriostatic antistatic multifunctional non-woven fabric which is fabricated by the steps of unwinding non-woven gray fabric; applying finishing agent by using an ultrasonic foam applicator; extruding out redundant finishing agent by using a rolling mill; and then drying by using a baking oven and winding. The finishing agent includes the following components: sodium dodecyl sulfate, hydroxyethyl cellulose, nanometer silver powder, penetrating agent JFC, nano-silica, gamma-aminopropyltriethoxysilane, sorbitan ester, cetyltrimethyl ammonium chloride, methacrylic acid, beta-cyclodextrin and spices. The non-woven fabric has multiple functions of being antibacterial, anti-static, anti-ultraviolet, washing-resisting, fragrance lasting and the like. Especially the ultrasonic foam applicator is utilized to conduct foam finishing, and the finishing agent can be evenly penetrated in the fiber structure by means of the effect of ultrasonic waves, so as to lead nanometer material in the finishing agent and particles of the spices to disperse in the fabric and to be wrapped by organic matters to form a microcapsulation state, so that all functions and effects are lasting.

The invention relates to toothpaste including radix notoginseng and propolis and a preparation method thereof. The toothpaste comprises the following raw materials according to percentage by weight: 0.1-1.5% of radix notoginseng extract, 0.03-3.2% of propolis powder, 25-46% of natural calcium carbonate, 5-15% of silica, 3-20% of glycerol, -4001-10% of polyethylene glycol, 0.2-1.0% of sodium pyrophosphate, 0.2-1.5% of xanthan gum, 0.1-1.5% of carboxymethyl cellulose, 3-25% of sorbic alcohol, 0.1-1% of saccharin sodium salt, 1-5% of lauryl sodium sulphate, 0.05-0.5% of sodium ethyl p-hydroxybenzoate, 0.02-2% of sodium propylparaben, 0.3-3% of essence, 0.01-0.3% of triclosan, 0.05-2% of zinc citrate, and the balance of water. The natural nursing toothpaste including the radix notoginseng extract has obvious curative effects on gingivitis, bleeding gums, dental ulcer and the like. The propolis has the functions of diminishing inflammation, easing pain and stopping bleeding. The radix notoginseng and the propolis are used in the toothpaste at the same time so that the toothpaste has more obvious effects for stopping pain and resisting gingivitis, bleeding gums and pain.

The invention discloses a modified nano mineral powder-containing aerated brick. The aerated brick is prepared from the following raw materials by the conventional process for preparing the aerated brick: 25 to 30 weight parts of carbide slag, 5 to 10 weight pars of cement, 10 to 15 weight parts of quick lime, 5 to 10 weight parts of modified nano mineral powder, 5 to 10 weight parts of shell powder, 3 to 5 weight parts of gypsum, 0.05 to 0.1 weight part of aluminum powder, 0.002 to 0.008 weight part of lauryl sodium sulfate, 0.03 to 0.08 weight part of tea seed cake powder, 0.3 to 0.5 weight part of soda ash, 0.5 to 0.8 weight part of expanded vermiculite powder, 0.3 to 0.5 weight part of zinc stearate, 0.01 to 0.03 weight part of aluminum hydroxide, 0.05 to 0.1 weight part of sodium diacetate and an appropriate amount of water. By adding the nano mineral powder, the volume weight of the brick, and the energy consumption are reduced; the brick is high in thermal insulation performance and sound insulation performance; compared with the conventional aerated brick, the aerated brick has the advantages that the thermal insulation performance and the sound insulation performance are improved obviously; the raw materials are mixed according to an optimized formula; and the intensity and the freezing resistance of the brick are improved obviously.

The invention relates to a propolis toothpaste and a preparation method thereof. The weight ratio of raw materials is: propolis powder 0.03~3.2%, natural calcium carbonate 25~46%, silicon dioxide 5~15%, glycerin 3~20%, polyethylene glycol-400 1~10%, sodium pyrophosphate 0.2~1.0%, Xanthan Gum 0.2~1.5%, Carboxymethyl Cellulose 0.1~1.5%, Sorbitol 3~25%, Sodium Saccharin 0.1~1%, Sodium Lauryl Sulfate 1~5%, Nipole Sodium gold ethyl ester 0.05~0.5%, sodium propylparaben 0.02~2%, essence 0.3~3%, triclosan 0.01~0.3%, zinc citrate 0.05~2%, the balance of water. The propolis toothpaste of the present invention has a good protective effect on teeth, and can also nourish gums and prevent the occurrence of gum inflammation.

The invention relates to high-adsorptivity modified activated carbon which is prepared from the following raw materials in parts by weight: 30-40 parts of grape vine, 40-50 parts of sawdust, 100-120 parts of activated carbon, 30-40 parts of corn cob, 6-9 parts of potassium hydroxide, 7-10 parts of sodium lauryl sulfate or polyethylene glycol, 7-10 parts of urea, 2-5 parts of zinc nitrate, 2-5 parts of nickel nitrate, 10-14 parts of Arabic gum or sodium alginate, 7-10 parts of modified attapulgite and a right amount of water. According to the invention, the grape vine, sawdust and corn cob are subjected to high-temperature heat treatment, and the prepared activated carbon has large specific surface area, realizes new application of wastes and achieves the effects of convenient carbonization activation process and less pollutant discharge; and by using the potassium hydroxide, urea, zinc nitrate and nickel nitrate substances for modification, the activated carbon increases the gap and enhances the adsorption capacity. Besides, the high-adsorptivity modified activated carbon is accessible in raw materials, simple in process, low in cost and suitable for industrial production, causes no generation of harmful substances and has favorable application prospects.

The invention provides a method for performing electroless nickel plating on the surface of aluminum nitride ceramic, belonging to the ceramic thin-film metallization field. The method comprises the following specific steps: 1) polishing the surface of aluminum nitride with a machinery; coarsening the aluminum nitride substrate with mixed acid or alkali, completely cleaning away the residual acid or alkali; 3) sensitizing the coarsened substrate in stannous chloride solution, activating in palladium chloride solution or performing activation without palladium; 4) weighting a certain amount of nickel sulphate, sodium hypophosphite, sodium citrate, sodium acetate, lactic acid, thiourea and sodium dodecyl sulfate in sequence to prepare a chemical plating solution; and 5) adjusting the pH value of the solution to 4.0-6.0 with acid or alkali, heating the solution to 70-95 DEG C, and placing the prepared substrate in the solution to perform electroless nickel plating. The invention is characterized in that the electroless nickel plating can be performed on the surface of the aluminum nitride ceramic substrate which is difficult to plate; and a certain amount of surfactant is added so that the plating becomes denser and smoother, the binding force between the plating and the substrate is increased, and the solderability of the plating is better.

A pest-combating composition including sodium lauryl sulfate and one or more of C6-12 fatty acids, preferably lauric and / or capric and / or caprylic acid, soy methyl ester, and 2-undecanone, and methods of combating pests utilizing same, are disclosed. The compositions can include a carrier oil such as silicon oil, soy methyl ester, or a vegetable oil, and can be in the form of an emulsion. The composition may be constituted as a spray composition, an aerosol, a lotion, a paste, or another compositional form. Pests that may be usefully combated with such composition include flying insects, including flies, mosquitoes, and wasps, ants, including arthropods such as fire ants, ticks, fleas, cockroaches, silver fish, thrips, gnats, aphids, Japanese beetles, and agricultural and horticultural arthropods and insects including beetles (potato and bean), flea beetles, fleahoppers, squash bugs, slugs, leaf hoppers, harlequin bugs, milk weed bugs, spiders, mites, lice, rodents, and deer.

The invention discloses a fluorescence quantitative PCR detection kit of hepatitis B virus and an application thereof. The kit is composed of the following independent components: DNA extraction solution I, DNA extraction solution II, DNA extraction solution III, DNA extraction solution IV, positive control interior label, PCR reaction liquid, probe HBV-SP, enzyme mixed liquor containing heat resistant DNA polyase and uracil DNA glycosylase, quantitative hepatitis B virus reference material, hepatitis B virus positive control serum and hepatitis B virus negative control serum, wherein DNA extraction solution I contains 0.2-1.0% of lauryl sodium sulphate (mass / volume), 1.0-4.0% of Triton (volume / volume) and 0.2-1.0mol / L of guanidinium isothiocyanate; DNA extraction solution II contains 100-300mmol / L of 4-HEPES, 100-300mmol / L of sodium chloride with pH of 6.5+ / -0.2 and 100-400 mu g / ml of magnetic beads; DNA extraction solution III contains 0.1-1.0% of Triton (volume / volume) and 100-300mmol / L of sodium chloride; DNA extraction solution IV contains mineral oil. The fluorescence quantitative PCR detection kit of hepatitis B virus of the invention can be used for detecting the HBV-DNA concentration in samples of serum, blood plasma or latex and the like.

The invention discloses modified nanoscale zero-valent iron and a preparing method thereof. The modified nanoscale zero-valent iron comprises nanoscale zero-valent iron and lauryl sodium sulfate. The lauryl sodium sulfate is wrapped on the surface of the nanoscale zero-valent iron, and the mass ratio of the lauryl sodium sulfate and the nanoscale zero-valent iron is 0.01-0.07. The preparing method of the modified nanoscale zero-valent iron comprises the following steps that nanoscale zero-valent iron particles are dispersed in a lauryl sodium sulfate solution through ultrasound, and the modified nanoscale zero-valent iron is obtained. According to the modified nanoscale zero-valent iron and the preparing method thereof, the lauryl sodium sulfate is used for modifying the nanoscale zero-valent iron, through a steric-hinerance effect, nano materials are stabilized, and the advantages of being good in dispersing performance, good in stability, high in reactivity and the like are achieved.

The invention relates to a method for identifying the animal-based components in meat and meat products by utilizing an SDS-PAGE (Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis) method, and belongs to the field of food sanitation inspection. The method provided by the invention is utilized to identify the pig, cattle, sheep, chicken and fish-based components in the meat products; the SDS-PAGE is carried out on the soluble proteins which are extracted from the processed sample by carrying out different temperature thermal treatments on fresh animal muscle tissues; and the pig, cattle, sheep, chicken and fish-based components in the meat products are judged according to an electrophoresis pattern. The method provided by the invention has the characteristics of strong specificity and sensitivity, and visual and reliable result judgment, and is simple to operate and has the extremely important significances on preventing animal disease pathogens such as foot-and-mouth disease, avian influenza and the like from spreading into China, preventing illegal retailers from concealing commodity components and guaranteeing the health of people.

The invention discloses metal rust-preventive oil comprising butyl acrylate. The oil is prepared from the raw materials of: No.120 solvent oil, paraffin, methyl diethanolamine, epoxy octyl stearate, magnesium naphthenate, a silane coupling agent KH560, a silane coupling agent A171, microcrystalline wax, aluminum stearate, magnesium lanolin soap, monoethanolamine, barium petroleum sulfonate, sodium lauryl sulfate, trioctyl trimellitate, benzotriazole, 2-aminoethyl heptadecenyl imidazoline, zinc stearate, an antioxidant BHT, an antioxidant 1010, dipropylene glycol, phytic acid, butyl acrylate, modified nano-grade dolomite powder, a composite film-forming material, and ferrocene. The rust-preventive oil provided by the invention has excellent contact rust resistance and good gas-phase rust resistance. The rust-preventive oil provided by the invention provides good gas-phase rust resistance and contact rust resistance for steel and brass.

The invention discloses a method for preparing an antibacterial composite material with nano-silver particles evenly dispersed in a polymeric matrix, which belongs to technique for preparing antibacterial nano composite materials and comprises the following steps: preparing styrene / methyl methacrylate hybrid monomers, a sodium dodecyl sulfate hybrid monomer solution, a silver nitrate aqueous solution and a trisodium citrate aqueous solution; mixing the silver nitrate aqueous solution and the trisodium citrate aqueous solution with the sodium dodecyl sulfate hybrid monomer solution according to a volume ratio to obtain a micro-emulsion containing silver nitrate and a micro-emulsion containing trisodium citrate; stirring and mixing the two micro-emulsions to obtain a stable micro-emulsion having hybrid monomers of continuous phases and containing the nano-silver particles; and then dispersing the emulsions in distilled water to prepare a common emulsion, introducing nitrogen for deoxidization, adding an initiator to perform emulsion polymerization reaction, using sodium chloride to perform emulsion-breaking and separation on the product, fully washing the product with deionized water, and soaking the product in ethanol, and drying the product to constant weight so as to obtain the antimicrobial nano-silver / poly(styrene-methyl methacrylate) composite material. The method has simple preparation processes and can make the nano-silver particles evenly dispersed in the polymer matrix, and the prepared composite material has broad-spectrum bactericidal property, and has high fatality rate to Escherichia coli, bacillus subtilis, staphylococcus aureus and pseudomonas aeruginosa in 24 hours.

The invention relates to a nitrogen foam fracturing fluid for coal bed methane and a preparation method of the nitrogen foam fracturing fluid. The nitrogen foam fracturing fluid comprises a gas phase and a fluid phase, the gas phase is nitrogen, the fluid phase is an aqueous solution which contains 0.20-0.50 wt.% of a foaming agent, 0.4-1.0 wt. % of a foam stabilizer and 0.10-0.30 wt.% of a gel breaker, the volume ratio of the gas phase to the fluid phase is (2-4):1, and corresponding foam mass is 65%-80%; and the foaming agent is a compound system which is composed of sodium dodecyl sulfate and N-(2-hydroxypropyl) perfluor caprylamide according to the mass ratio of (8-10):1, the foam stabilizer is C16-C20 lauryltrimethylammonium chloride, and the gel breaker is a redox system which is composed of ammonium persulfate and sodium sulfite according to the mass ratio of (1.0-2.0):1. A foam generator is used for obtaining the nitrogen foam fracturing fluid. The nitrogen foam fracturing fluid has the advantages of being simple in fluid preparing, small in harm to a coal bed, low in leak-off, small in friction, rapid in flowback speed, high in sand-carrying capability and the like.

The invention relates to a preparation method of polyacrylate emulsion containing silicon, fluorine and a phosphate group. The polyacrylate emulsion is widely applied in the fields of leather, paper and architectural decoration and finishing paint due to excellent caking property, film-forming property and mechanical properties. According to the preparation method provided by the invention, butyl acrylate, methyl methacrylate, styrene, hydroxypropyl methacrylate, vinyl triethoxy silane, phosphate functional monomer and dedecafluoroheptyl methacrylate are taken as polymerization monomers, lauryl sodium sulphate and fatty alcohol-polyoxyethylene ether are taken as emulsifiers, peroxysulphate is taken as an initiator, and a pre-emulsification seeded emulsion polymerization process is adopted for preparing the polyacrylate emulsion. According to the polyacrylate emulsion obtained by adopting the preparation method provided by the invention, fluorine, silicon and the phosphate group are introduced into a molecular structure, flame retardance, low temperature resistance, corrosion resistance, water resistance, anti-scouring property, mechanical properties and adhesiveness with materials such as metal and cement of a polymer emulsion film are obviously improved, and the obtained polyacrylate emulsion can be applied to leather, textile, metal antirust paints and decorative finish paints for an internal wall and an external wall of a building material and has good development prospect.

The invention relates to a strong gas-wetting nanosilicon dioxide water block removal agent, a preparation method thereof and a method for wetting transition of rock surface. The modified nanosilicon dioxide water block removal agent comprises the following raw materials: 0.1-0.5% of modified nanosilicon dioxide, 0.5-1% of an emulsifying agent OP-10, 0.5-1% of lauryl sodium sulfate, 25-50% of ethyl alcohol and the balance of water; the nanosilicon dioxide modified treating fluid is 0.05-0.3% of a non-ionic fluorocarbon surfactant water solution. The invention further provides a preparation method and application of the modified nanosilicon dioxide water block removal agent. The modified nanosilicon dioxide material has a super-hydrophobic and super-oleophobic property, can be used for changing the liquid-wetting property of the rock surface into strong gas-wetting property, so as to reduce the viscous resistance of fluid flowing on the rock surface, improve the flowing status of fluid in a porous medium, remove water blocking damage, is used for low-permeability oil and gas field exploitation and increasing of the oil and gas recovery ratio.

The invention relates to a preparation method of a nano TiO2-modified PVDF (Polyvinylidene Fluoride) ultrafiltration membrane. The preparation method comprises the following steps of: preparing a membrane making liquid from 15-20 percent by mass of PVDF, 1-3 percent of pore-foaming agent, 1-4 percent of nano TiO2, 3-5 percent of surfactant and 70-80 percent of solvent, ultrasonically oscillating the membrane making liquid for 5-10 minutes, leaching and defoaming; scraping with a membrane scraping machine to form a liquid membrane, standing in the air for 20-60 seconds, soaking into a coagulation bath and coagulating the liquid membrane into an ultrafiltration membrane; and after the ultrafiltration membrane falls off, taking the ultrafiltration membrane out, soaking into distilled water and cutting according to required size for later use. A nano TiO2 hydrophilic monomer is arranged on the surface of the PVDF ultrafiltration membrane, sodium dodecyl sulfate serving as a surfactant is used simultaneously, and dispersion is performed by ultrasonically oscillating, so that agglomeration of nano TiO2 is reduced, nano TiO2 is quickly and uniformly distributed into the membrane making liquid, the hydrophilicity of the PVDF ultrafiltration membrane is enhanced effectively, the energy consumption is enhanced greatly, the anti-pollution capacity and pollutant intercepting performance of the membrane are enhanced, and the service life of the membrane is prolonged.

The invention relates to leaking stoppage cement slurry for well cementation and a preparation method thereof. The leaking stoppage cement slurry consists of the following components in parts by weight: 100 parts of oil-well cement, 50-150 parts of water, 0.01-8 parts of fibrilia, 1-20 parts of dispersing agent, 1-20 parts of filtrate reducer, 5-50 parts of alkali regulator, 1-10 parts of retarder and 0-1 part of defoaming agent, wherein the dispersing agent is lauryl sodium sulfate or sodium hexametaphosphate; the filtrate reducer is 2-acrylamide-2-methylpropanesulfonic acid or hydroxyethylcellulose; the alkali regulator is silicon powder; the retarder is sodium lignin sulfonate or citric acid; the defoaming agent is dimethyl silicon oil or tributyl phosphate; and the fibrilia is one or the mixture of two or more of jute, flax, hemp, ramie and sisal. The invention effectively solves the problem of leakage loss of cement slurry and inherent brittleness of set cement in the well cementation process on the premise of meeting various engineering performances required by the well cementation and provides the guarantee for subsequent operation of oil well gas.

The invention provides a flyash geopolymer based porous material and a preparation process thereof. The porous material comprises the following components in parts by weight: 60-100 parts of flyash, 40-70 parts of alkali activator, 0-40 parts of admixtures, 0-5 parts of glass fibers, 2-8 parts of physical foaming agents and 0-0.8 part of chemical activators, wherein the alkali activator is alkaline mixed liquor containing various ions and comprises industrial water glass, sodium hydroxide, water, polyethylene glycol and sodium phosphate; the admixtures refer to levigated metakaolin, silicon micropowder and calcined coal gangue; the physical foaming agents include expired shampoo, an anionic surfactant sodium dodecyl sulfate (SDS), fatty alcohol polyoxyethylene ether sodium sulfate (AES) and disodium fatty alcohol polyoxyethylene ether monosulfosuccinate (AESS); the chemical foaming agents include aluminium powder, hydrogen peroxide, and the like. The porous material has adjustable volume density, fine and uniform pore diameter, low heat conductivity, high strength, the same life as buildings and good fireproof performance.

The invention relates to a compound plant-derived pesticide, which is prepared by mixing the following components in percentage by weight: 2-5% of nicotine, 2-5% of wild mugwort oil, 3-8% of cinnamon leaf oil, 5-10% of litsea cubeba oil, 30-40% of flavescent sophora root mixed ethanol extract, 10-15% of Rangoon creeper fruit mixed water extract, 15-20% of emulsifying agent, 1-2% of sodium dodecylsulfate and the balance of water, wherein the flavescent sophora root mixed ethanol extract is obtained by extracting 3 parts by weight of flavescent sophora root, 1 part by weight of triperygium wilfordii, 2 parts by weight of toosendan fruit, 2 parts by weight of hellebore, 2 parts by weight of szechuan aconite, 1 part by weight of cnidium fruit and 1 part by weight of camphor tree seed with 70wt% ethanol solution, and has the relative density of 1.02-1.10; and the Rangoon creeper fruit mixed water extract is obtained by extracting 1 parts by weight of groundsel and 2 parts by weight of Rangoon creeper fruit with water solution, and has the relative density of 1.02-1.10. The compound plant-derived pesticide overcomes the limitations that the most plant derived pesticides are single in pest-killing components and simple in action mechanism, improves the comprehensive prevention and control effect, is quick in acting and long in duration, and avoids the generation of pest pesticide resistance.