34results about How to "Wide range of process conditions" patented technology

The electroplating solution of the invention comprises rare earth chloride, FeCl2, complexe agent, additive I, II, CaCl2. The process comprises, an inert anode or transition metal anode or two anodes; introducing pure argon or nitrogen to dispel oxygen, the whole electroplating process conducting in the protective environment of pure argon or nitrogen, the working current density is 20mA / cm2-200mA / cm2, the time is 15min-48hours, the temperature is 0-70degree C, taking out of the electroplated members, washing ,drying and sealing; placing the electroplated film in the protective environment of pure argon or nitrogen, heating at 700-800 degree C for 15min-20hours, sealing and storing. The electroplating solution is stable and has a wide range of working conditions. The rare earth alloy has more than 11% of rare earth.

The present invention relates to a preparation method of an organic compound, in particular to a method used for synthesizing 2, 3, 4, 5-tetrahydro-1H-1, 4-benzodiazepine. The raw materials of o-halogen benzyl halogen and ethylene have mixing reaction in an organic solvent; the intermediate product of N-(2-benzyl) ethylene diamine can be prepared after separation and purification; then the intermediate product is dissolved in the system of ring-closing agents; under the condition with a catalyst, the final product can be prepared through ring-closing reaction. Compared with the synthetic method in the prior art, the preparation method of the 2, 3, 4, 5-tetrahydro-1H-1, 4-benzodiazepine has the significant advantages of simple synthetic process, wide range of technical conditions, safe andeasy operation, environmentally friendly operation, cheap and easily available raw materials, great decrease of the production cost, high yield of the final product, high purity of the product, and broader application prospects.

The invention discloses a softening process for industrial raw water, and the process comprises the following steps of: A. industrial raw water input; B. softening reagent injection; C. precipitation and collection of a natural crystal grain which mainly comprises CaCO3; D. cyclic reinjection of the natural crystal grain which mainly comprises CaCO3; E. crystal grain growth to become a circulating fluidized-suspended bed; F. softened water output; G. sand discharge. Compared with traditional clarifier process, the invention has the advantages of both a fluidized bed and a suspended bed, so the filtration rate is high and the volume is small; and the resultant is sand which is easy for dehydration. According to the process of the invention, the crystal nucleus is generated naturally and grows circularly by itself; no artificial processing of the crystal nucleus is necessary; and the cost for the processing and the addition of an artificial crystal nucleus is saved; the particle size and the flow velocity of the suspended crystal grain in the process of the invention are self-matched without strict requirements to the particle size of the initial crystal nucleus, and are self-adjusted, so the process condition is quite wide; no accurate matching with the filtration rate of raw water is necessary; and the process operation becomes more simple and reliable.

The invention relates to a new hydrothermal synthesis method of zinc borate whisker. The method comprises the following steps: firstly, using borax to prepare 2.0-5.8wt% of solution; secondly, adding the solution in zinc salt solution, stirring evenly to obtain slurry; thirdly, placing the slurry in a reaction kettle, adjusting the inner filing degree of the reaction kettle, heating the reaction kettle to 110-160 DEG C, performing thermostatic reaction for 1-50 hours, cooling to the room temperature to obtain white precipitate; and finally, filtering the precipitate, washing, and drying to obtain zinc borate whisker powder. In the synthesis process, surfactant used as crystal form modifier is not added; and the anisotropy of crystals is utilized and the reaction conditions are controlled to prepare zinc borate whisker, the technology is simple, and the cost is low.

The invention relates to a preparation method of lithium type low-silicon faujasite. The method comprises the following steps of (1) uniformly mixing forming particles of medium-silicon faujasite with the SiO2 / Al2O3 mol ratio being 2.2 to 3.0 and caustic solution comprising sodium hydroxide and potassium hydroxide for preparing a reaction mixture; (2) performing hydrothermal reaction on the reaction mixture in the step (1) to obtain the formed low-silicon faujasite solid product; (3) performing lithium exchange on the solid products obtained in the step (2) to prepare formed lithium type low-silicon faujasite. The invention also relates to the lithium type low-silicon faujasite prepared by the method and a purpose of the lithium type low-silicon faujasite as an adsorbent.