42results about How to "Prevent conversion" patented technology

The invention discloses a modified metakaolin-based permeation-resistant and crack-resistant agent for concrete. The modified metakaolin-based permeation-resistant and crack-resistant agent for concrete comprises: by mass, 10 to 75% of modified metakaolin, 5 to 40% of fine limestone powder, 4 to 40% of superfine coal ash, 1 to 20% of calcined hydrotalcite, 2 to 40% of fine quartz sand and 0.2 to 20% of solid silane powder. A preparation method of the modified metakaolin comprises the following steps of putting dry and washed kaolin into a bowl mill, carrying out grinding to obtain kaolin powder, carrying out calcination of the kaolin powder at a temperature of 500 to 1000 DEG C for 0.5 to 6.0 hours to obtain metakaolin, putting the metakaolin into a dispersion machine, adding an organic modifier of sulfamate or triethanolamine into the metakaolin, wherein a mass ratio of the metakaolin and the organic modifier is in a range of (5000: 1) to (100: 1), and carrying out dispersion to obtain the modified metakaolin having a contact angle of 50 to 100 degrees and a specific surface area of 8000 to 15000m<2>/kg. The modified metakaolin-based permeation-resistant and crack-resistant agentfor concrete can be utilized as a concrete additive, improves strength of concrete at different ages, does not produce obvious influences on concrete work performances, obviously improves anti-chloride ion penetration capability of concrete, reduces total shrinkage of concrete and improves crack resistance of concrete.

The invention discloses road silicate cement clinker on the basis of industrial waste residues and a method for preparing the road silicate cement clinker. The road silicate cement clinker comprises nickel slag, calcium carbide residues, zirconium-containing silica residues, bauxite tailing, desulfurization gypsum and mineralizers. The method includes mixing, grinding and homogenizing the nickel slag, the calcium carbide residues, the zirconium-containing silica residues, the bauxite tailing, the desulfurization gypsum and the mineralizers to obtain cement raw materials; preheating the cementraw materials, then calcining the cement raw materials under the condition of the temperature of 1280-1350 DEG C for 30-35 min and then carrying out cooling to obtain the road silicate cement clinker.The road silicate cement clinker and the method have the advantages that the 28 d compressive strength of the road silicate cement clinker can reach 63.9-75.2 MPa, the strength grade of the road silicate cement clinker can reach 62.5 grade, the 28 d breaking strength of the road silicate cement clinker can reach 9.8-18.2 MPa, the 28 d mortar abrasion loss of the road silicate cement clinker is lower than 2.5 kg/m<2>, cement is high in stability, and the road silicate cement clinker is high in abrasion resistance and excellent in work performance; the method is simple, complicated working procedures can be omitted, and the road silicate cement clinker and the method are low in cost.

The invention discloses an in-situ soil remedying composite material capable of efficiently removing heavy metals. The in-situ soil remedying composite material comprises the following components: 10-20 parts of sodium persulfate, 5-10 parts of sodium polyepoxysuccinate, 1-5 parts of polyvinylpyrrolidone, 1-3 parts of nanocarbon, 1-5 parts of serpentine, 5-10 parts of lignite humate, 1-3 parts ofa surfactant, 4-8 parts of calcium dioxide, 4-8 parts of Chinese herbal residue, 1-3 parts of potassium permanganate, 1-5 parts of red mud particles, 1-5 parts of chitosan dithiocarbamate and 1-3 parts of methacryloyloxyethyl trimethylammonium chloride. The in-situ soil remedying composite material can remedy soil contaminated by various heavy metals (such as Pb, Cd, Cu, Zn, Cr and As) and toxic organic substances (such as chlorinated organic compounds, brominated organic compounds and antibiotics), reduces conditions of strong heavy metal activity and strong bioavailability in the soil, prevents transfer of the heavy metals from the soil to plants, prevents bioenrichment and amplification of the heavy metals, can efficiently remove the heavy metals such as chromium and mercury from the soil, and restores original functions of the soil, so that needs of agricultural development are met, and the ecological safety of crops and other plants is guaranteed, and the ecological risks of the bioamplification and the enrichment of the heavy metals to people are avoided.

The invention provides a waste incineration additive with the function of capturing heavy metals and a preparation method thereof. The additive adopts zeolite and limestone as raw materials, the zeolite and the limestone are mixed according to the weight ratio of (50:50)-(70:30), and a product is prepared by soaking in an alkali metal solution. The preparation method comprises the following stepsof: mixing zeolite powder and limestone powder according to the proportion, heating and soaking in a NaOH solution for 8-24 hours, washing, drying and breaking for completion. The prepared waste incineration additive has the advantages of simple preparation method, low cost of the raw materials, obvious effect on controlling the emission of the heavy metals, capability of reducing the leaching toxicity of the heavy metals of incineration bottom slag and the like.

The invention provides a lyophilized collagen mask. The lyophilized collagen mask is prepared from recombinant human-derived collagen, sodium hyaluronate, betaine, hydroxyethyl cellulose, a first nutrient, a second nutrient, a third nutrient, a lyophilizing adjuvant and deionized water. By reasonably proportioning collagen, nutrient substances and other components, the lyophilized collagen refreshing mask which is convenient to store, not easy to deteriorate, high in activity and easy to use can be prepared and can be used immediately after being dissolved, so that the safety of the raw materials can be kept, and the use convenience is improved. Hydroxyethylurea, tetrahydromethylpyrimidine carboxylic acid and nicotinamide are added into the formula, so that the stable state of human skin can be maintained, the epidermal repair speed is accelerated, and wound healing is promoted. Compared with the formula in the prior art, the product has the advantages of high safety, low irritation risk, rich composition, high effectiveness, high security, high bioactivity, good moisturizing effect, human body absorption improvement, epidermal repair speed acceleration and wound healing promotion.

The invention belongs to the field of packaging materials, relates to a non-woven fabric based composite fresh-keeping packaging material mainly for storage-intolerant fruits and vegetables, and particularly relates to a non-woven fabric based composite fresh-keeping packaging material and a preparation method thereof. The non-woven fabric based composite fresh-keeping packaging material comprisesnon-woven fabrics and a preservative carried by the non-woven fabrics as a base, and the usage amount of the preservative ensures that the non-woven fabrics is increased in weight by 5%-10%. The non-woven fabric based composite fresh-keeping packaging material realizes air permeability for the fruits and also realizes fresh keeping for the fruits.

The invention provides a catalyst for removing dioxins in flue gas, which belongs to the technical field of waste incineration treatment, including attapulgite, TiO ₂ and active ingredients, active ingredients include V ₂ o ₅ 、WO ₃ , Sb ₂ o ₅ and Nb ₂ o ₅ , the attapulgite, TiO ₂ The sum of the mass percentages of active components and active components is 100%, attapulgite 0‑20%, TiO ₂ 75‑85%, V in active ingredient ₂ o ₅ 3‑10%, WO ₃ 0‑7%, Sb ₂ o ₅ 0‑7%, Nb ₂ o ₅ 1‑5%, MoO ₃ 0‑9%. The invention also provides a preparation method and application of the catalyst for removing dioxins in flue gas. The invention has properties such as large specific surface area, superior low-temperature activity, high ability to remove dioxins and high mechanical strength, so that the performance of the catalyst can be maximized, and can be widely used in the removal of dioxins in flue gas remove.

The invention discloses a composition with weight losing and beautifying effects. The composition comprises the following raw material: 1 to 10 parts of soybean peptide, 0.1 to 2 parts of collagen peptide, 0.1 to 2 parts of rose flower powder, 0.1 to 2 parts of polydextrose, 0.1 to 2 parts of grape seed extract, 0.1 to 2 parts of aloe vera extract, 0.1 to 2 parts of acerola cherry powder, 0.1 to 2parts of sodium hyaluronate, 0.1 to 2 parts of garcinia cambogia extract, 0.1 to 2 parts of apple polyphenol, 0.1 to 2 parts of pueraria flower extract, and 0.1 to 2 parts of betaine. With full consideration of the mutual synergistic effect of all the components, a proper propotion is provided; and after all components are compounded based on a proportion, the composition can be absorbed by thebody well and the mutual cooperation and synergistic interaction effects of the components can be fully exerted after the components are absorbed; a product having beautifying and weight losing effects is prepared; and problems that the skin loses elasticity due to fat reduction and collapses and the like can be solved.

The invention provides a weight-losing tablet and an application thereof in a sweat steaming weight-losing method. The weight-losing tablet is characterized by being prepared from the following raw materials in percentage by weight: 23%-30% of konjaku flour, 6%-9% of moringa oleifera powder, 4%-7% of tea polyphenol, 3%-7% of bitter gourd, 4%-7% of hawthorn, 3%-7% of semen cassia, 3%-7% of lotus leaves and the balance of auxiliary materials. The weight-losing tablet is prepared by extracting, mixing, pelletizing, drying, granulating, total blending and tabletting operation. The fabrication process level is further improved; a weight-losing tablet composition is used cooperatively with the sweat steaming method, so that the effects of safely losing weight and healthily shaping a body can be quickly achieve. The weight-losing tablet is free of a toxic or side effect on the body of a weight loser and can be further popularized and applied.

The invention discloses an 800-MPa medium-carbon high-silicon cold-rolled galvanized sheet and a preparation method thereof. The method comprises the following steps: hot rolling, cold rolling and galvanizing. The sheet comprises the following components in percentage by weight: 0.16-0.20% of C, 1.6-2.0% of Mn, at most 0.010% of S, at most 0.020% of P, 0.05-0.30% of Si, at least 0.025% of Als, 0.20-0.30% of Cr, 0.010-0.050% of Ti, and the balance of Fe and inclusions within allowable range. The contents of carbon and silicon are properly enhanced, and proper amounts of titanium and chromium are added. Compared with the low-carbon alloy formula by adding molybdenum and chromium, the cost is obviously reduced, and the production difficulty is lowered; and on the premise of enhancing the carbon content and silicon content, the galvanizability of the galvanizing technique is ensured. The enhancement of the contents of carbon and silicon and addition of proper amounts of titanium and chromium mainly aim to enhance the hardenability of steel and lower the Ac3 line, so that the CCT curve of steel shifts rightwards, and the Bs and Ms transition temperature is lowered. The method prevents all austenite from being converted into bainite, and ensures the martensite ratio in the galvanized product to be higher than 15%.

The invention relates to recombinant Escherichia coli, a preparation method thereof and a method to synthesize D-1,2,4-butantriol via the recombinant Escherichia coli, and belongs to the technical field of biology. XylA, yjhH and yage are knocked out of Escherichia coli; more than one of 2-ketonic acid reductase gene, methylglyoxal synthase gene, transaminase gene, transhydrogenase gene, acetokinase gene and phosphoric acid transacetylase gene is further knocked out; and/or more than one of xylonic anhydrase gene, alcohol dehydrogenase gene and glucose 6-phosphate dehydrogenase gene are over-expressed to obtain recombinant Escherichia coli. Xylose is used as a basic substrate, and glucose, acetic acid and glycerol can also be added to form a composite substrate; the synthesis of D-1,2,4- the recombinant Escherichia coli butanethiol has every low content of auxiliary products; the preparation method is simple, the production cycle is short, the cost is low, and the preparation method has a promising industrial development and application prospect.

The invention relates to a robot wrist body and a preparation method thereof, and belongs to the technical field of machines. The robot wrist body is made of an aluminum alloy. The aluminum alloy comprises, by mass, 0.5%-1.3% of Si, 0.2%-0.5% of Mn, 0.17%-0.35% of Mg, 0.5%-1.2% of Ni, 0.8%-1.5% of Be, 2.5%-3.5% of glass fibers, 1.5%-3.0% of nanometer Al2O3 and the balance Al. The preparation method of the robot wrist body includes the steps that the glass fibers and the nanometer Al2O3 are each processed through an activation solution and a modification solution and are then dried; and a metalraw material is heated and smelted into an alloy solution, the glass fibers and the nanometer Al2O3 are added, the mixture is then subjected to pouring to form a green body, and thermal treatment isconducted. The prepared robot wrist body is prepared from the aluminum alloy, is small in mass and high in flexibility and has high strength, tenacity and tensile strength.