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1642results about How to "Improve reaction speed" patented technology

Photothermographic recording material coatable from an aqueous medium

A process for producing a photothermographic recording material having a support and a photo-addressable thermally developable element containing photosensitive silver halide in catalytic association with a substantially light-insensitive silver salt of an organic carboxylic acid, an organic reducing agent for the substantially light-insensitive silver salt of an organic carboxylic acid in thermal working relationship therewith and a binder including a water-soluble binder, a water-dispersible binder or a mixture of a water-soluble binder and a water-dispersible binder, comprising the steps of: (i) producing an aqueous dispersion or aqueous dispersions containing photosensitive silver halide, a substantially light-insensitive silver salt of an organic carboxylic acid, an organic reducing agent for the substantially light-insensitive silver salt of an organic carboxylic acid and a binder including a water-soluble binder, a water-dispersible binder or a mixture of a water-soluble binder and a water-dispersible binder; (ii) coating the aqueous dispersion or aqueous dispersions onto a support thereby forming a photo-addressable thermally developable element on the support, wherein at least 80 mol % of the photosensitive silver halide is silver iodide and the aqueous dispersion further contains or the aqueous dispersions further contain a diazine compound.
Owner:AGFA HEALTHCARE NV

Heliostat tracing controlling apparatus and its control method

The invention discloses a heliostat tracking control device, which comprises a main controller and a closed-loop tracking sensor. The main controller comprises a DSP control circuit, a RTC real-time clock, digital signal input and output units, an analog signal input unit, a signal amplifying circuit, a human-computer interface device, a display device, a watchdog circuit, an asynchronous motor, a line of serial port communication interface which carries out the communication with a monitoring computer, and a line of serial port communication interface which carries out the communication with an azimuth angle and altitude angle encoder. The invention further discloses a heliostat tracking control method, the method adopts the open-loop and the closed-loop combined control, the open-loop roughly calculates and adjusts the position of a heliostat and the closed-loop corrects and eliminates the accumulated error till the precise tracking. The heliostat tracking control device has the advantages that the heliostat tracking control device can not have the accumulated error or the failure of the tracking system due to the rainy and cloudy weather. The system adopts the combined control algorithm within the control period, thus achieving the precise tracking of the heliostat. The tracking reaction speed, the power consumption and the cost are low, thus forming a modular structure.
Owner:HOHAI UNIV

Method for producing porous nano silica and active carbon by utilizing rice hull ash

The invention discloses a method for producing porous nano silica and active carbon by utilizing rice hull ash, which comprises the following steps of: at lower temperature and normal pressure, performing secondary alkali dissolution on subcarbonate, and filtering to obtain alkali-dissolved filter liquor and filter residue; adding a certain amount of dispersing agent into the filter liquor, reducing temperature for ageing, filtering, washing, and removing the dispersing agent to obtain the porous nano silica; and adding an activating agent into the alkali-dissolved filter residue, activating, washing and drying to obtain the high specific surface area active carbon. The alkali and the active carbon can be recycled, and only a small amount of alkali and active carbon is lost. The method has the advantages of not seriously corroding equipment due to no high-temperature and high-pressure alkali boiling, sufficient raw materials, low price, no environmental pollution, and higher quality of the obtained active carbon and silica.
Owner:CHANGSHA DESIGN & RES INST OF CHEM IND MIN +1
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