32results about How to "The process conditions are mature" patented technology

The invention relates to a method for producing catalytic reformed feedstock by taking light and medium gasoline distillates as raw materials and extracting selective solvent to extract and rectify catalytically cracked gasoline in the absence of hydrogen. The method comprises the following steps: 1, fractionation prefabrication of light and medium distillate raw materials of catalytically cracked gasoline; and 2, extraction, rectification, desulfuration and dearomatization of light and medium distillates of catalytically cracked gasoline, wherein light and medium distillates of catalyticallycracked gasoline obtained in step 1 are fed into the middle-lower part of an extraction-rectification tower, while fresh extraction agent or recycled extraction agent is added from the upper part of the extraction-rectification tower; thus, the light and medium distillates contact the extraction agent inside the tower to generate desulfurized and dearomatized light-component raffinate phase (i.e.catalytic reformed feedstock product) rich in olefin hydrocarbon at the top of the tower after extraction, rectification, desulfuration and dearomatization. The method carries out desulfuration and dearomatization of catalytically cracked gasoline at the same time and reclaims solvent, thereby having the advantages of simple process, moderate operation conditions, hydrogen source saving and low production cost.

The invention provides an optically variable anti-counterfeiting pure red pigment. The anti-counterfeiting pigment comprises a central reflecting layer, a first dielectric layer, a first half-absorption layer, a second dielectric layer and a second half-absorption layer. The first dielectric layer and the first half-absorption layer are outwardly, sequentially, circularly and symmetrically arranged from the central reflecting layer. As the outermost layer of the anti-counterfeiting pigment, the second dielectric layer and the second half-absorption layer are symmetrically arranged on the two sides of the central reflecting layer. The rest can be done in the same manner. That means, along with the increasement of the total number of the layers, the layers are outwardly and symmetrically in radiation distribution from the central reflecting layer. According to the technical scheme of the invention, the pigment is of a N-layer symmetrical structure, and is constructed based on the multi-beam destructive interference condition for reflection beams within the wavelength range of blue and green light beams, wherein N=7, 9, 11, 13....,7+(2n). Meanwhile, the multi-beam constructive interference for reflection beams within the wavelength range of red light beams is ensured at the same time. Therefore, the pigment is displayed within the color range of pure red chromaticity.

The invention discloses a grid drive circuit for controlling a bridge type drive circuit. The grid drive circuit comprises a low-voltage side control chip, a high-voltage side control chip and a level shifting chip, wherein the low-voltage side control chip and the high-voltage side control chip are produced by adopting a complementary metal oxide semiconductor (CMOS) process; the level shifting chip is produced by a high-voltage isolation manufacturing process; the low-voltage side control chip is mainly integrated by a control logical module and a low-voltage side drive module; the level shifting chip is mainly integrated by a level shifting module; and the high-voltage side control chip is mainly integrated by a high-voltage side drive module. The grid drive circuit has the advantages that: singlechips for integrating all the modules are realized by being divided into three chips, the level shifting module is produced only by adopting the high-voltage isolation manufacturing process, and the control logical module, the low-voltage side drive module and the high-voltage side drive module are produced by adopting the CMOS process; and the grid drive circuit is encapsulated into an integrated circuit, so compared with the conventional grid drive chip, the complexity of the production process is reduced, the chip area is reduced, the production cost is reduced, and a circuit with more complicated properties can be designed favorably.

The invention discloses a method for separating and refining high-purity L-arabinose and D-xylose with a simulated moving bed, which comprises the following steps: by using bagasse, bagasse pith or sugarcane leaf as a raw material, hydrolyzing, purifying, separating with a simulated moving bed chromatographic separator to obtain an L-arabinose solution with the purity of higher than 90% and a D-xylose solution with the purity of higher than 85%, and crystallizing to obtain the L-arabinose and D-xylose with the purity of up to 99%. The method has the advantages of simple technological operation, high sugar purity, high yield, low cost and high equipment stability, and is suitable for industrial production.

The invention discloses a preparation method of trans-trans dicyclohexyl alkane liquid crystal compounds. According to the preparation method, 1-(4-(4-alkylcyclohexyl)phenyl)alkyl-1-one is used as a raw material; a benzene ring is converted into a cyclohexyl ring by means of a catalytic hydrogenation reaction; transposition is performed under the alkaline condition, so that 1-(4-(4-alkylcyclohexyl)cyclohexyl)alkyl-1-ol is obtained; the trans-trans dicyclohexyl alkane liquid crystal compounds are finally obtained by carrying out an oxidation reaction and a reduction reaction. The preparation method provided by the invention is unique in synthetic route, not only realizes green chemical industry, but also enables the product yield to be greatly increased, improves the product quality, and reduces the cost.

The invention discloses an optical chromotropic anti-counterfeiting pigment. A pigment coating comprises a reflection layer; one side surface of the reflection layer is outwardly sequentially and circularly provided with dielectric layers and half-absorption layers; the reflection layer is made of materials selected from one or more than two from Ti, TiN or TiNx; the dielectric layer is made of a material with refractive index smaller than 1.68; and the half-absorption layer is made of materials selected from one or more than two from Ti, TiN or TiNx. According to the environmental protection-type optical chromotropic anti-counterfeiting pigment, the spectral properties are stable; environmental protection properties are also provided when similar grain size properties with the existing chromotropic anti-counterfeiting structure, uniform metal effect luster and angle-dependent optical effects can be ensured; the material combination is non-toxic and harmless to a human body; environmental stability is good; and the optical chromotropic anti-counterfeiting pigment is particularly applicable to safety anti-counterfeiting packaging printing of food, drinks and drugs closely related to human health.

The invention discloses a manufacturing method of a cadmium telluride film solar cell, which is characterized by comprising the following steps of: (1) by adopting a copper sheet or a stainless steel sheet as a back electrode of the cadmium telluride film solar cell, coating p (Positve) type cadmium telluride slurry on the metal sheet by a screen printing method to manufacture a p type cadmium telluride film; controlling the annealing temperature of the coated p type layer at 600 DEG C, wherein annealing time is 40 minutes; and then raising the temperature to 850 DEG C and preserving for 1 hour; (2) manufacturing an intermediate transition layer and an n (Negative) type cadmium telluride window layer on the p type cadmium telluride film to form a p-n junction; (3) evaporating or printing a comb-shaped front electrode on the cadmium telluride film of the window layer; and (4) wiring and welding the front and the back electrodes to finish the manufacture of the cadmium telluride film solar cell. The method is simple and convenient as well as easy for scale production, and can promote the scale production, largely reduce the cost and the price of the cadmium telluride film solar cell, and enhance the photovoltaic conversion efficiency of the cell.

A process for separating and purifying the high-purity oligose includes treating the resin HZ001 sequentially by acid, alkali and salt solution, and using the treated resin to prepare high-purity oligose from low-purity one. The process for treating and regenerating resin HZ001 is also disclosed.

The invention discloses a wood floor based on carbon paper as a heating layer and a preparation method of the wood floor, and belongs to the technical field of decoration and heating. According to thepreparation method, a papermaking wet-process forming technology is adopted to prepare a carbon fiber paper layer, moreover, polypyrrole is uniformly distributed on the carbon fiber paper layer through impregnation and hot pressing technology to prepare a low-resistance heating layer, the function of low-voltage rapid heating can be realized, and the electric heating conversion efficiency can reach up to 98%; and the heating layer has the characteristics of being thin, light and good in uniformity, so that compared with other products prepared from carbon fibers, heating is more uniform, andthe temperature uniformity is up to 98%. The preparation method method has the advantages of being simple, green and environment-friendly, mature in process technology, low in cost, beneficial to human health, and is suitable for industrial production.

The invention discloses a preparation method of trans-4-substituted cyclohexyl formaldehyde, which is characterized by including steps of reacting trans-4-substituted cyclohexyl methanoic acid and oxalyl chloride under the condition of catalyst I and preparing trans-4-substituted cyclohexyl formyl chloride; performing hydrogen reduction reaction in the presence of palladium catalyst II, promoter III, promoter IV; preparing the trans-4-substituted cyclohexyl formaldehyde. The design is reasonable in reaction route and matured in technical condition; the reaction process of the modular preparation route is green and environment-friendly, and good for industrial production; the prepared product has high quality, the gas chromatography purity of the product is over 99.9%; a monomer liquid crystal material compounded by a midbody is good in quality and able to completely adapt to the need of TN-LCD, STN-LCD, and TFT-LCD.