91results about How to "Easy to achieve serial production" patented technology

The invention provides an electrochemical method for directly preparing silicon nano power and nanowires (tubes) from a compound SiX or a mixture containing the compound SiX, which is characterized by comprising the following steps of: by using the compound SiX or the mixture containing the compound SiX as a cathode, setting an anode; placing the anode in electrolyte containing metallic compound fused salt; applying voltage between the cathode and the anode; controlling reaction conditions; and preparing the silicon nano power and the nanowires (tubes) on the cathode. The invention has the advantages of short production process without pollution, easy operation and material obtaining, inexpensive equipment and easy continuous production, also opens a new field for applying the electrochemical method to the preparation of one-dimensional nano materials and explores a new way for preparing the silicon nano power and the nanowires (tubes).

The present invention discloses a full-automatic tea roller with several rolling drum. It is characterized by that said invention adopts several rolling mechanisms, and uses two motor to make drive to respectively implement rolling movement of rolling mechanism and divided rotation movement of tray. Every rolling mechanism uses three cylinders to make operation; all the cylinders and motors are controlled by controller. Said tea roller is stable in rolling quality and high in working efficiency.

Provided are a composite catalytic membrane for catalyzing an esterification reaction and a preparation method thereof. The composite catalytic membrane has a porous structure, with non-woven fabric as the base film, and a catalytic coating is compounded on the surface of the non-woven fabric and in the pores and gaps of the non-woven fabric fibers. The catalytic coating uses a solid acid as a catalyst to polymerize Compound or modified sulfonated polymer is used as film-forming material, and the film is formed by coating method or impregnation method, and after forming, it is cross-linked to obtain a composite catalytic membrane. Utilizing the microporous structure and developed specific surface of the composite catalytic membrane, the catalytic esterification and the greening and high efficiency of the biodiesel preparation process are realized. The composite catalytic membrane has high mechanical strength and good repetition stability, and is easy to realize the continuous production repetition of the catalytic esterification process. The preparation process is simple and easy to control and scale up.

The invention relates to a liquid alkali decomposition method of high-grade mixed rare earth ore concentrate. The liquid alkali decomposition method of the high-grade mixed rare earth ore concentrate is characterized by comprising the steps: mixing the high-grade mixed rare earth ore concentrate with REO being more than 60 percent by weight and a sodium hydroxide with the concentration being more than 60 percent by weight and performing reaction on the mixed slurry at 150 to 160 DEG C for 0.2 to 1 hour, wherein the weight ratio of the mixed rare earth ore concentrate to the sodium hydroxide is 1:(3.5-7.5); after reaction is finished, performing hot filtration at the temperature being more than 60 DEG C and washing an alkali cake obtained by filtration with water until the pH value is 7; and dissolving the alkali cake which is washed until the pH value is 7 with hydrochloric acid of 6 to 10 mol / L and controlling the pH value to be 4 to 5 to obtain a pure rare earth chloride solution. The liquid alkali decomposition method of the high-grade mixed rare earth ore concentrate has the advantages that high-concentration liquid alkali reaction is conducted under the condition of high alkali-ore ratio, so the system is high in flowability, small in alkali concentration change, high in reaction temperature, insusceptible to fluctuation and short in reaction time, continuous production is realized easily, the problem about continuous industrial production of the liquid alkali decomposition process of the high-grade mixed rare earth ore concentrate is solved, and continuous production of the alkali decomposition process is realized.