5results about How to "Reduce reaction efficiency" patented technology

This invention relates to a non-stop maintenance process and apparatus for chlorosilane production. The apparatus comprises, in sequence, a hydrogen main, a second switching valve, a hydrogen buffer tank, a ninth switching valve, a hydrogen compressor, a static mixer, a first heat exchanger, a seventh switching valve, a heater, and a fluidized bed reactor. The other inlet of the static mixer is connected in sequence to the STC buffer tank and the tenth switching valve. The first and second ends of the first heat exchanger are respectively connected to the outlet of the static mixer and one end of the seventh switching valve. The third end of the first heat exchanger is connected to subsequent processes via a sixth switching valve, and the second end of the first heat exchanger is connected to subsequent processes via a first branch and a fifth switching valve. This maintenance process and apparatus prevents bed damage and material clogging at the bottom and internal components of the tower during fluidized bed cooling and depressurization, reducing the workload during fluidized bed restart and avoiding personnel entering confined spaces, thus reducing the risk of accidents.

A method for recovering organic tin in a vinyl ether compound transesterification kettle liquid, comprising the following steps: 1) taking the vinyl ether compound transesterification kettle liquid, cooling to-10-40 DEG C, standing, until crystals are precipitated in the transesterification kettle liquid, filtering, or, cooling to-10-40 DEG C, adding 0.1-5% of organic tin powder in mass fraction to the transesterification kettle liquid, stirring and mixing uniformly, then standing, until crystals are precipitated in the transesterification kettle liquid, filtering; 2) adding a basic solution with a concentration of 5-8 wt% to the crystals obtained by filtering, in a mass ratio of 1:0.5-10, and heating to 25-60 DEG C, until flocculent substances appear on the surface of the basic solution, and filtering the lower aqueous phase; 3) washing the crystals obtained by filtering with water, then washing with an organic solvent, drying, to obtain organic tin. The process condition is mild and the operation is convenient, the recovered organic tin can be used repeatedly, the production cost of enterprises is reduced, and environmental pollution is avoided.

This invention relates to the field of alkane conversion equipment technology, and discloses an alkane conversion equipment for high-purity nitrogen hydrodeoxygenation, including a distribution mechanism installed on the inner wall of a tank, with a distribution disc fixedly connected to the inner wall of the tank; a separation mechanism installed on the inner wall of the distribution mechanism; and a flow guiding mechanism installed on the inner wall of the distribution mechanism. Solid particles present in the gas are retained in an arc-shaped plate above the arc plate due to changes in gas flow direction. The solid particles in the arc plate are then carried away by subsequent gas flow, allowing them to be guided to the arc ring via a guide ring, and then, driven by the gas flow and blocked by a shielding ring, enter the storage tank. This method prevents a large number of solid particles from entering the catalyst bed, thereby blocking the pores inside the catalyst and causing the gas to bypass the blocked catalyst area, forming a channel and reducing reaction efficiency.

This invention provides a plasma processing apparatus and control method. The plasma processing apparatus includes: a vacuum reaction chamber with an upper electrode and a lower electrode inside; a sleeve penetrating the top wall of the vacuum reaction chamber; a movable ring surrounding the upper electrode and movable vertically between a transfer position and a process position; a support rod at the top of the movable ring, the top of which passes through the sleeve; a first driving mechanism at the top of the support rod; and a limiting pad connected to the first driving mechanism and movable perpendicular to the support rod. When the limiting pad moves to the outer circumference of the support rod and is pressed against the sleeve by the top of the support rod, the movable ring is raised by at least one limiting pad height relative to the process position, placing the movable ring in a cleaning position for performing the cleaning process. This invention increases the gap between the movable ring and the lower electrode during the cleaning process, improving the efficiency of the cleaning reaction chamber.

The application provides a fuel cell membrane electrode activation method, and specifically comprises the following steps: (1) installing a fuel cell on a test bench, setting an anode gas as hydrogen, setting a cathode gas as nitrogen, purging the hydrogen and the nitrogen to the anode and the cathode respectively, and pre-humidifying the fuel cell; (2) controlling the temperature of the fuel cell to be 30-60 DEG C, and ensuring the relative humidity RH of the cathode and the anode of the fuel cell to be greater than or equal to 100% through pre-humidification; (3) replacing the cathode gas from nitrogen with air, performing forced discharge treatment on the fuel cell under the condition that the hydrogen metering ratio is 1.0-2.0 and the air metering ratio is less than or equal to 1.3, and operating the fuel cell at a constant voltage less than or equal to 0.3 V to activate the fuel cell membrane electrode. The technical scheme of the application solves the problems of long time consumption, incomplete activation, low catalyst utilization rate and large energy consumption in the existing fuel cell membrane electrode activation method.