4results about How to "Low ion content" patented technology

The invention discloses battery-grade lithium carbonate as well as a preparation method and application thereof, and the preparation method comprises the following steps: synchronously introducing a lithium-containing solution and carbon dioxide bubble water into a reaction device, and reacting to obtain lithium carbonate; the carbon dioxide bubble water is prepared by adopting the following method: simultaneously introducing carbon dioxide and water into a shear pump, and shearing and mixing to prepare the carbon dioxide bubble water. According to the method, the traditional gas-liquid reaction that carbon dioxide is directly introduced into the lithium-containing solution is creatively transformed into a gas-liquid-liquid reaction system that carbon dioxide bubble water prepared in advance and the lithium-containing solution are synchronously introduced, so that the product purity and stability are remarkably improved, and the bottleneck of a traditional intermittent process is broken through; the preparation method is simple, the production capacity and efficiency are remarkably improved, industrial large-scale production is easy to realize, and the obtained product lithium carbonate crystal is complete in growth, concentrated and controllable in particle size distribution and regular in morphology, and meets the processing requirements of high-end battery materials.

The present application belongs to the technical field of polyol detection, and particularly relates to a detection method for judging the metal ion content of polyol based on conductivity, comprising the following steps: S100, respectively preparing an ethanol aqueous solution and a polyol mixed solution with known metal ion content to be detected; S200, adding the polyol mixed solution with known metal ion content to be detected into the ethanol aqueous solution successively, determining the conductivity value of the ethanol aqueous solution after adding the polyol mixed solution each time, and calculating the conductivity difference of the polyol mixed solution before and after dilution; S300, performing standard curve fitting according to the polyol mixed solution with step concentration and the corresponding conductivity difference, and obtaining a fitting equation; S400, substituting the conductivity difference of the polyol sample determined in the step S200 into the fitting equation obtained in the step S300, and calculating the metal ion content to be detected of the polyol sample. The present application can effectively reduce the test cost and improve the test efficiency.

The application discloses a device for reducing the electric conductivity of cooling water of an SVC system TCR valve group, and relates to the technical field of cooling systems.The device comprises a high-level water tank and a deionization tank; the water outlet end of the high-level water tank is connected with the water inlet end of the SVC valve group through a pipeline; the water outlet end of the SVC valve group is connected with the water return end of the high-level water tank through a pipeline; and the deionization tank is arranged on the pipeline between the high-level water tank and the SVC valve group. The deionization tank is arranged in the circulating pipeline between the high-level water tank and the SVC valve group, the ion content in the cooling water system is significantly reduced through the deionization tank, the personnel maintenance cost is reduced, and the stable operation of the SVC system is ensured.

The present application relates to a kind of pharmaceutical composition for treating constipation and its preparation method and use, and the pharmaceutical composition is made of senna 80%, angelica 10%, cistanche 10%.In the present application, cistanche is treated by using extraction, adsorption and other extraction methods, to reduce the content of metal toxic substances, and avoid the poisoning reaction that appears in long-term use.