38results about How to "The process is simple and environmentally friendly" patented technology

The invention relates to a method for preparing a sweetening agent sucralose by a one-pot process. The method comprises the following steps of: protecting sucrose which is taken as a raw material by sucrose-6-hydroxyl through boron anhydrous with presence of an acid catalyst and a solvent, directly implementing a chlorination through thionyl chloride without separating disucrose borate which is an intermediate product to obtain hexachloro disucrose borate, and hydrating to obtain the sucralose. The method disclosed by the invention sequentially implements three reactions, namely selective protection, chloro reaction and hydration, of the sucrose-6-hydroxyl in one pot to prepare the sucralose, and the process is simple and convenient and reduces discharge of wastewater; and the prepared sucralose product is high in purity, high in yield, low in cost, and suitable for industrial production.

The invention provides a preparation method of a metandienone product. The preparation method comprises the following steps that 1,4-androstenedione, namely IDD, is adopted as a raw material, in the presence of methylmagnesium chloride, an organic solvent and acid, alpha-CH3 and beta-OH are introduced at the 17 position, and metandienone is prepared; and then the obtained metandienone is heated byactivated carbon in acetone or lower alcohol below C4 for reflow discoloration and is recrystallized, and the metandienone product is obtained. According to the preparation method, the IDD serves asthe raw material to prepare the metandienone, compared with a traditional method adopting diosgenin as a raw material, the raw material source is wide, a process is economic and environmentally friendly, and the production cost is significantly lowered. Compared with a traditional production method, according to the preparation method, a synthesis route is short, the process is easy, convenient and environmentally friendly, the product yield is high, the quality is good, and the production raw material cost is lowered by 40-45% by calculating through the current raw material price.

The invention discloses a preparation method of modified granite waste rock powder crystalline glaze, which belongs to the technical field of ceramics. The raw material composition of the granite waste stone powder crystal glaze: 80-95 parts of modified granite powder, 1-15 parts of crystal nucleus agent, 1-5 parts of sintering aid, and 1-2 parts of dispersant. After the raw materials are prepared, water is added and mixed uniformly by ball milling to obtain a glaze, which is sprayed, dried and sintered to prepare a crystalline glaze. The invention has the characteristics of high utilization rate of granite waste rock powder, environmental protection process, rich glaze pattern, low cost, etc., and can realize large-scale high value-added utilization of granite waste rock powder.

The invention discloses a method for preparing metandienone. The method comprises the following steps: dissolving mestanolone into an organic solvent, performing a reaction with bromine for 4-6 hours in a strong acid solution, and performing bibromination at a 2,4 site of mestanolone molecules so as to obtain 2,4-bibromine mestanolone; further dissolving the 2,4-bibromine mestanolone into an organic solvent, performing a reaction for bidebromination with a debromination agent for 2-6 hours, and implementing two steps of reactions to synthesize a crude product of metandienone; decoloring the crude product with activated carbon in low-carbon alcohol less than C4, and performing recrystallization, thereby obtaining a methyltestosterone product, wherein the content of HPLC is 99.0-99.5%, the melting point is 162-167 DEG C, and the total yield of a synthesis weight is 75-78%. The method disclosed by the invention has the advantages of being wide in raw material source, short in synthesis route, simple, convenient and environmentally friendly in process, high in product yield, good in quality, and the like, the production cost of the method is reduced by 30-35% when being compared with that of a conventional method, the solvent can be recycled and repeatedly used, and thus the method is both economic and environmental-friendly and is very beneficial to industrial production.

The invention provides a method for preparing a metandienone product. The method comprises the following steps of: crystallizing and separating deodorized distillates in production of soybean oil to obtain phytosterol, carrying out microbial fermentation on the phytosterol by adopting a nutritional culture medium and one or more microorganism bacteria to obtain 1,4-androstadienedione, i.e. IDD, then preparing metandienone in the presence of methylmagnesium halide, an organic solvent and acid by using the IDD as a raw material, and refining the metandienone to obtain the metandienone product. The metandienone is prepared by adopting the IDD as the raw material; and compared with a traditional method adopting diosgenin as the raw material, the method of the invention has the advantages thatthe source of the raw materials is wide, the process is economical and environmentally friendly, and the production cost is greatly reduced. Compared with a traditional production method, the method of the invention has the advantages of short synthetic route, simple and environment-friendly process, high product yield, and good quality; and by calculating at the price of the raw material at present, the cost of the production raw material can be reduced by 40 to 45 percent.

The invention relates to a carbon / molybdenum dioxide / silicon / carbon composite material, a battery negative electrode containing the same and a lithium-ion battery. The carbon / molybdenum dioxide / silicon / carbon composite material is nano-molybdenum dioxide evenly loaded on nano-carbon fibers And nano-silicon particles, the outermost layer is coated with carbon layer. The battery negative electrode comprising the carbon / molybdenum dioxide / silicon / carbon composite material is used to make a lithium ion battery, and the discharge specific capacity at 0.1A / g is not less than 750mAh / g, and the discharge specific capacity at 3A / g reaches at least 250mAh / g, after 500 cycles at a rate of 0.5A / g, the discharge specific capacity still remains at 480mAh / g and above, which has good cycle performance and rate performance.

The invention provides a composite reinforced fabric and a preparation method thereof. The composite reinforced fabric includes high-hardness thermoplastic elastomer yarns and low-hardness thermoplastic elastomer yarns, and the surface of the low-hardness thermoplastic elastomer yarns is slightly fused to adhere to the surface of the high-hardness thermoplastic elastomer yarns. The preparation method of the composite reinforced fabric comprises: weaving high-hardness thermoplastic elastomer yarns and low-hardness thermoplastic elastomer yarns into fabrics, and the melting point of the low-hardness thermoplastic elastomer yarns is 50°C to 150°C; , hot pressing the fabric to obtain a composite reinforced fabric, the hot pressing temperature is greater than or equal to the melting point of the low-hardness thermoplastic elastomer yarn and lower than the melting point of the high-hardness thermoplastic elastomer yarn. Through the above-mentioned technical means, a composite reinforced fabric with strong tensile strength and strong impact resistance can be produced in a relatively simple and environmentally friendly process.

The invention discloses a process method for recovering valuable metals in lead paste of waste lead-acid batteries by using iron powder and cone glass, and belongs to the technical field of lead paste recovery and treatment. The method is to mix conical glass, iron powder and lead-acid battery lead paste with auxiliary materials, use the sulfur in the lead sulfate paste and the iron in the iron powder to carry out fermentation and solidification reaction, and then make billets, solidify and use fire smelting to produce lead Alloy, iron columbine, soot and slag, not only achieve the purpose of comprehensive recovery of valuable metals, but also reduce the emission of sulfur dioxide. The process is simple and environmentally friendly, with low cost and high recycling efficiency.

The invention provides a method for preparing metandienone, the method comprises firstly using a nutrient medium and one or more microbial strains, performing microbial fermentation on phytosterol toprepare 1,4-androstenedione, namely IDD, then using the IDD as the raw material, introducing alpha-CH3 and beta-OH into a 17 site with the existence of methyl magnesium halide, an organic solvent andan acid, and preparing the metandienone. The method uses the IDD as the raw material to prepare the metandienone, compared with the traditional method taking diosgenin as the raw material, the sourceof the raw material is wide, the process is economical and environmentally friendly, and the production cost is greatly reduced. Compared with the traditional production method, the synthesis route isshort, the process is simple, convenient and environmentally friendly, the yield of a product is high, the quality is high, and the cost of the raw material for production is reduced by 40-45% according to the current price of the raw material.