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

Method and device for preparing highly-pure capsicum pigment capsaicin through supercritical fluid column chromatography

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.
Owner:GUANGZHOU LEADER BIO TECH

A method for environmentally friendly recycle and reusing waste pow battery

ActiveCN109244586ASolve the safety problem of being volatile and easily decomposed into toxic and harmful gasesHarm reductionWaste accumulators reclaimingBattery recyclingFiltrationHazardous substance
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.
Owner:BEIJING UNIV OF TECH

Integrated biogas desulfurizing device and method

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.
Owner:XI AN JIAOTONG UNIV

A kind of waste power battery environment-friendly recycling method

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.
Owner:BEIJING UNIV OF TECH

Method for hydrolyzing glycolic acid ester based on carbonic acid system as traceless catalyst

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.
Owner:上海卓笙环保科技有限公司

Safe tank steaming and washing process for dangerous goods transportation tank car

The invention relates to a safe tank steaming and washing process for a dangerous goods transportation tank car, which comprises the following steps of: S1, opening an oil discharge valve at the rear part of the tank car to control and discharge residual media in the tank, and dismounting a fusing bolt and an anti-overflow probe rod of a sea valve; s2, the tank car is driven into a tank steaming station for tank steaming; s3, after the tank truck finishes steaming, stopping steaming, putting an axial flow fan into a rear manhole, continuously ventilating for more than 30 minutes, and stably reducing the temperature in the tank to below 25 DEG C; s4, cleaning the interior of the tank car; and S5, after cleaning is completed, an automatic drying machine is used for conducting hot air drying on the interior of the tank, after drying is completed, the device is taken out, and a sea bottom valve fusing bolt, an anti-overflow probe rod and the steam cleaning tank are installed. The method is clear in operation process, safe and efficient in process, stable in quality, advanced in safety control measure and cleaning process, capable of effectively solving the cleaning problem of the dangerous goods tank car, free of loopholes in process connection, high in cleaning quality, environment-friendly and efficient in technological process and free of pollution.
Owner:山东京博物流股份有限公司
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