35results about How to "Production costs will not increase" patented technology

The present invention relates to a flux for heat-resistant magnesium alloy. It is used for melt protection in the course of smelting heat-resistant magnesium alloy. It is characterized by that its composition includes (by wt%) 5%-10% of NaCl, 5%-12% of CaF2, 5%-15% of Na3AlF6, 10%-20% of CaCl2, 0%-5% of MgCO3, 0%-3% of H3BO4 and the rest is Kcl.

The invention relates to a water-soluble gel preparation containing paraquat dichloride, which belongs to the technical field of pesticide. The water-soluble gel preparation comprises 0.5 to 45 mass percent of paraquat dichloride (which accounts for 0.362 and 32.58 mass percent of paraquat cation) and 5 to 40 percent of surfactants and also comprises safe auxiliary ingredients such as emetic, warning colouration, odor agents, bitter agents and the like and the balance water. The water-soluble gel preparation containing the paraquat dichloride has the advantages that the excellent weeding activity is realized, the use method is flexible and convenient, in addition, the water-soluble gel preparation is safer to people and animals, and the production and the use are more convenient.

The invention discloses a high-density alloy magnetic core and a preparation method thereof. The preparation method of the high-density alloy magnetic core of the present invention comprises the following steps: 1) mixing metal oxide powder and sintering aid to obtain prefabricated body powder; 2) mixing prefabricated body powder and resin, granulating and drying and pressing to obtain a prefabricated body with a hollow structure; 3) mixing magnetic powder and resin to obtain a magnetic core powder with a sintering shrinkage rate smaller than that of the prefabricated body powder; 4) putting the prefabricated body into a mold, and then injecting the magnetic core powder into the mold and the prefabricated body to obtain a composite green body, deglue and sinter, and then separate the magnetic core to obtain a high-density alloy magnetic core. The invention prepares an alloy magnetic core with high density and high dimensional precision by improving the material composition and preparation process, and the production cost will not increase while the density and dimensional precision are improved, fully satisfying high frequency and high current The application requirements of the power supply inductance device.

The invention discloses a method for preparing and purifying 2-tert-amyl anthraquinone. Phosphorus pentoxide and trifluoroacetic acid are mixed and heated to a certain temperature, and 2-(4'-tert-amylbenzoyl)benzoic acid (hereinafter referred to as ABB acid) is dissolved in a solvent and added dropwise to the mixed phase. After mixing, the reaction is carried out at a certain temperature. The agent adsorbs tar-like impurities at a certain temperature, and after the adsorption, the reaction solution is filtered for distillation and crystallization to obtain a high-purity 2-tert-amylanthraquinone product. The invention has the advantages of mild reaction conditions, simple operation, less side reactions, recyclable adsorbent, and reduced separation cost.

The invention relates to a preparation method of thermal paper sensitizer ethylene glycol diphenyl ether. The preparation method uses halogenated benzene and ethylene glycol as raw materials, any one or more of 2,2'-bipyridine and its derivatives as a ligand, and in the presence of a base and a solvent, Cu(I ) or Cu(II) as a catalyst to prepare ethylene glycol diphenyl ether. Compared with the known technology, the production cost of ethylene glycol diphenyl ether is greatly reduced after using ethylene glycol and bromobenzene as the reaction raw materials. In addition, the ligand 2,2'-bipyridine can be recycled and used without increasing the production cost. It has great implementation value and social and economic benefits.

The invention belongs to the technical field of pesticide and relates to a water-soluble paste agent containing paraquat dichloride. The water-soluble paste agent comprises 0.5-45% of paraquat dichloride amounting to 0.362-32.58% of paraquat cation, 5-40% of surfactant, safe auxiliary components of emetic, warning coloration, stink agent and bitter agent, etc. and the balance of water. According to the invention, paraquat is processed into a paste agent, which can effectively avoid human or animal skin calcination caused by splashing of paraquat preparation; because the water-soluble paste agent has low fluidity, accidental taking or impulse swallow is reduced, and safety of the paraquat is enhanced substantially.

The invention provides white carbon black capable of improving the processing performance of rubber and a preparation method of the white carbon black. The preparation method comprises the following steps: (1) heating water, adding water glass, and mixing the water with the water glass to obtain a reaction base solution, wherein the temperature in the whole process does not change; (2) adding acidand water glass into the reaction base solution for mixing and reaction, wherein the reaction temperature and the concentration of the water glass are constant, and are equal to the reaction temperature and the concentration of the water glass in the reaction bottom solution; (3) adjusting the pH of a reaction system; (4) adding acid and water glass for mixing and reaction, wherein the pH of thereaction system is 7.0 to 10.0 and is constant, and the reaction temperature is constant and is equal to that of the reaction base solution; (5) adding acid to adjust the pH till the pH is equal to the pH of aging reaction and the temperature is constant and equal to that of the reaction base solution; (6) carrying out aging reaction on white carbon black suspension under a condition that the temperature is equal to that of the reaction base solution, and then carrying out solid-liquid separation to obtain the white carbon black. The white carbon black provided by the invention can improve theprocessing performance of the rubber on the basis of not reducing the mechanical property of the rubber.