60results about How to "Safe and efficient process" patented technology

A machine for removing the tips of tablet punches includes a housing that contains a turret that is rotated about a substantially vertical axis and a cutting wheel. The turret supports a plurality of tablet punches in a substantially vertical position with the tips of the punches being exposed below the turret. A cutting wheel is positioned below the turret and is located in a position so as to be in the path of the tips as the turret rotates. A motor rotates the cutting wheel so that the tips are removed from the punches as they are rotated into the path of the wheel. A nozzle is directed to the position where the cutting wheel engages the tips of the punches and sprays a cooling fluid in order to cool the cutting wheel and tips to prevent overheating thereof.

The invention relates to a method and a device for preparing a highly-pure capsicum pigment capsaicin through supercritical fluid column chromatography. The method comprises the following steps: mixing and dissolving supercritical carbon dioxide or modified supercritical carbon dioxide and capsicum oleoresin or saponification products thereof in a feeding tank, filtering the obtained solution, carrying out adsorption and desorption separation through a preparative chromatography column filled with solid adsorbent particles, collecting an eluate containing different solutes to corresponding collectors according to the signal of a detector, separating the solute components and carbon dioxide in a separator, carrying out filtering dedusting, condensation liquid removal, adsorption column purification and compression on tail gas to form a liquid, and returning the liquid to a storage tank in order to carry out cycle use. Extremely low solvent residual and even no solvent residual products with a high purity, such as capsanthin, capsorubin, beta-carotene, beta-cryptoxanthin, zeaxanthine, capsanthin ester, capsorubin ester and cryptoxanthin ester, and highly pure products, such as nordihydrocapsaicin, capsaicin and dihydrocapsaicin can be prepared through the method.

The invention relates to the technical field of artificial intelligence, and discloses a card-free cash withdrawal method, which comprises the following steps of: obtaining identity information inputby a user; based on the identity information, obtaining an identity verification photo matched with the identity information; acquiring a user head image acquired by the front end in real time, and performing living body detection; if the living body detection is passed, performing face comparison on the user head image and the identity verification photo; and if the face comparison is passed, carrying out card-free cash withdrawal based on a withdrawal password input by the user. The invention further discloses a card-free cash withdrawal device and equipment and a computer readable storage medium. According to the invention, on the premise of ensuring the same security level as card-holding cash withdrawal, a quicker and more convenient card-free cash withdrawal mode is provided for a user, the user requirements are met, and the user experience is improved.

The invention discloses a method for preparing dichloropropanol. The method comprises the steps of performing a contact reaction on allyl chloride, hydrogen chloride and an oxidant in the presence ofa catalyst, wherein the catalyst is a titanium silicate molecular sieve catalyst. The method has the characteristics of no use of toxic chlorine, simple operation process, mild reaction conditions, high raw material conversion rate, high selectivity of dichloropropanol, and easy separation of the catalyst.

The invention discloses a method for preparing dichloropropanol. The method comprises the steps of performing a contact reaction on allyl chloride, hydrogen chloride and an oxidant in the presence ofa catalyst, wherein the catalyst contains a titanium silicate molecular sieve subjected to activation treatment and the activation treatment comprises the step of contacting a titanium silicate molecular sieve with an aqueous solution containing an acid and a selectable peroxide. The method has the characteristics of no use of toxic chlorine, simple operation process, mild reaction conditions, high raw material conversion rate, high selectivity of dichloropropanol, and easy separation of the catalyst.

The invention discloses an integrated biogas desulfurizing device and method, and belongs to the technical field of biogas desulfurizing. The integrated biogas desulfurizing device comprises a reaction tank, wherein the reaction tank is used for accommodating absorbing liquid; the upper side of the reaction tank is provided with a gas outlet, and the lower side of the reaction tank is provided with a gas collection and distribution port; the gas collection and distribution port is connected with a fan at the exterior of the reaction tank; a high-voltage electrode and a low-voltage end are arranged in the reaction tank; one end, without being immersed under the liquid level, of the high-voltage electrode is connected with a positive electrode of a high-voltage direct current power source control console through a high-voltage conducting wire; one end, without extending under the liquid level, of the low-voltage end is connected with a negative electrode of the high-voltage direct current power source control console. The integrated biogas desulfurizing device has the advantages that a technology route and device combining direct current glow discharge and wet desulfurization are proposed; after reaction, the sulfur element with higher purity can be collected for recycling; the investment cost and running cost are low, and the treatment, regeneration and recycling are integratedtogether.

A method for recycling and reusing waste power battery belongs to that field of recycling waste battery. The battery is completely discharged and placed under a sealed and protective gas atmosphere, and the battery pole head, the shell and the battery cell are collected by cold cutting; the obtained cell is immersed and cleaned in the replacement solution. And the positive electrode, the negativeelectrode and the diaphragm are separated by unwinding; The positive and negative electrode pieces are respectively soaked in distilled water and ultrasonicated to obtain positive and negative electrode materials, aluminum foil and copper foil; The electrolyte volatile in the process of cell disassembly is absorbed by absorption tower. Distillation, condensation, filtration and drying are used forrecycling of the replacement liquid used in the cell immersion process, and the harmful substances are recovered through a neutralization sedimentation tank and a tail gas absorption tank. The ultrasonic liquid is recycled after being precipitated by adding demulsifier, filtered and treated by biological contact oxidation. The invention realizes the recovery and regeneration of the waste lithiumion battery, the process is safe, harmless, the automation degree is high, the treatment is efficient and convenient, and the secondary pollution to the environment is not generated.

The invention discloses a method for hydrolyzing glycolic acid ester based on a carbonic acid system as a traceless catalyst. The method comprises the following specific preparation steps: S1, adding glycolic acid ester and water into a reaction kettle; S2, introducing carbon dioxide into the reaction kettle to replace air in the kettle three times; S3, raising the temperature, introducing carbon dioxide into the kettle, continuously carrying out the stirring reaction, and stopping stirring when the reaction is finished; S4, cooling the reaction mixture; and S5, carrying out qualitative analysis by using a gas chromatograph-mass spectrometer, and carrying out quantitative analysis by using gas chromatography. According to the invention, under the condition that no other exogenous acid catalyst exists, glycolic acid is prepared by catalyzing a glycolic acid ester aqueous solution through pressurized CO2, a weakly acidic carbonic acid system formed in situ under the reaction condition is used as the catalyst, and after the reaction is finished, the required product can be directly obtained by utilizing the characteristic that the carbonic acid system is spontaneously decomposed into water and CO2 during pressure reduction, so that the step and process of separating the product from the homogeneous / heterogeneous catalyst are omitted, the operation is simple, and the process is efficient and safe.

The invention relates to a synthesis technology of benzoxazinone compounds represented by formula I. The technology is characterized in that a dichlorobenzene derivative represented by formula II reacts with ethanolamide represented by formula III in the presence of a catalyst and an inorganic alkali to obtain the compound of formula I. R in the formula I and the formula II is selected from hydrogen, an amino group, a nitro group, a C1-6 alkyl group, a C1-6 alkoxy group and a hydroxyl group. The technology is a one-pot reaction method, realizes one-step direct cyclization, and has the advantages of simple reaction conditions, convenience in treatment, safe and highly-effective process, and high yield.

The invention provides a system for fragmenting a metal ore layer by instantaneous electric pulse and a use method, and belongs to the technical field of in-situ leaching mining. The system comprisesa transformer, a rectifier, an energy storage capacitor, an energy controller, a discharge electrode and the like, the transformer is connected with the rectifier and used for converting alternating current into direct current, the rectifier is in threaded connection with the energy storage capacitor, the energy storage capacitor is connected with the energy controller, the energy controller is connected with the energy converter, and the energy converter is connected with the discharge electrode and performs an instantaneous electric pulse effect on an ore body, so that the metal ore layer isfragmented. The device is reasonable in structure, convenient to use and capable of effectively increasing gap channels in the in-situ leaching mining process, so that ore leaching liquid is in moresufficient contact with ore, and help is provided for improving the in-situ leaching efficiency.

The invention discloses a bracket and a use method of the bracket. The bracket comprises a bracket body, lifting lugs and slide ways. The bracket body comprises two long supporting beams, two short supporting beams and a reinforcing plate, the long supporting beams and the short supporting beam are welded into a rectangular frame structure, the reinforcing plate is used for reinforcing the frame structure, the lifting lugs are located on the top end face of the frame structure and divided into two groups, the first group is arranged on the two long supporting beams and used for being connectedwith a lifting row during lifting, the second group is arranged on the frame structure and used for being connected with the lifting lugs on a denitration reactor, and the slide ways are used for movement of the denitration reactor, are parallel to the long supporting beams and are arranged on the top end surface of the bracket body. By mans of the bracket, in the process of hoisting the denitration reactor, the denitration reactor can be firmly fixed without moving, so that hoisting is smoothly and safely carried out, and the denitration reactor can be efficiently unloaded from the bracket in a labor-saving mode.

The invention discloses a preparation method of 4,5-difluorophthalic acid, the specific method steps are as follows: S1: Synthesis of 4,5-difluoro-1,2-phthalonitrile: add 4,5 ‑Difluoro‑1,2‑dihalobenzene and polymethylhydrogensiloxane, stirred and dissolved with N,N‑dimethylacetamide, and reacted, cooled after the reaction, and added tri( Dibenzylideneacetone) dipalladium and 1,1'-bis(diphenylphosphino)ferrocene, then slowly add zinc cyanide for reaction, after the reaction is completed, cool down and add water, and use sodium bicarbonate solution under vigorous stirring Adjust the pH to 8, stir for 2 hours and then filter, wash and elute with a mixed solvent of petroleum ether and ethyl acetate to obtain an off-white solid intermediate 4,5-difluoro-1,2-phthalonitrile; S2: Synthesis of 4,5‑difluoro‑1,2‑phthalic acid. The process of the invention is safe, efficient and easy to operate, has low requirements on equipment, low cost of raw materials, and is easy for industrialized production.