30results about How to "Reduce the impact of subsequent processes" patented technology

The invention relates to an alkaline cleaning additive used after acid texturing of polycrystalline silicon wafers. The alkaline cleaning additive comprises the following components in percentage by weight: 0.1 to 0.5 percent of span-80, 0.6 to 2.5 percent of tween-40, 0.3 to 1.5 percent of dodecyl polyglycol ether and the balance of water. The invention also provides a cleaning liquid for alkaline cleaning of the polycrystalline silicon wafers. The cleaning liquid comprises an alkaline solution and the alkaline cleaning additive used after acid texturing of the polycrystalline silicon wafers, wherein the mass ratio of the alkaline cleaning additive for the polycrystalline silicon wafers to the alkaline solution is (0.2-2):100; the alkaline solution is the alkaline solution of inorganic alkali or organic alkali. The cleaning liquid can be used for cleaning the residual organic matters on the surfaces of the silicon wafers in a texturing process, so that the surfaces of the silicon wafers are hydrophobic and blow-drying of the silicon wafers is facilitated; porous silicon on the surfaces of the silicon wafers can be removed in an alkaline cleaning process, so that the hidden danger that a dispersing process is unstable due to the porous silicon is eliminated and the uniformity of the subsequent silicon nitride coating film is promoted.

The invention provides a comprehensive recovery method of rare metals in waste circuit boards. The method comprises crushing the waste circuit boards, sorting, calcining, immersing in an ammonia water, filtering to get a filter residue A which is dissolved by nitric acid to recover silver, lead, tin, antimony, etc., immersing a filter residue metal B insoluble in the nitric acid with a mixed solution of hydrochloric acid and sodium hypochlorite, filtering to get a filtrate C which is then introduced into SO2 so as to displace gold powder, and then obtaining platinum powder and palladium powder respectively by extracting and displacing. The method has advantages of high metal recovery rate, simple method, simple equipment, no environmental pollution and the like, maximizes recycling of valuable metal resources in the waste circuit boards, and has enormous social and economic benefits.

The invention discloses a radioactive waste liquid treatment system and method. A radioactive waste liquid treatment system, comprising: an ultrafiltration unit, which includes an ultrafiltration membrane, and the ultrafiltration unit is used to remove colloidal nuclides in the radioactive waste liquid; a concentration unit, which includes a reverse osmosis device, and the reverse osmosis The water inlet of the device is connected with the purified liquid outlet of the ultrafiltration unit, and the reverse osmosis device receives the purified liquid of the ultrafiltration unit to perform reverse osmosis concentration on the purified liquid of the ultrafiltration unit; the ion exchange unit, It comprises an ion exchange bed, and the water inlet of the ion exchange unit is connected with the concentrated solution outlet of the reverse osmosis device, and the ion exchange unit receives the concentrated solution of the concentration unit to convert the concentrated solution of the concentration unit. The enriched radionuclides are extracted to the solid phase.

The invention discloses a new method for extracting vanadium from a production flow of aluminum oxide. The method comprises the following steps of: firstly, complexing vanadium in a carbon mother solution by using a complexing agent; then, extracting the vanadium-containing complex by using a modified amine extractant, wherein a sodium vanadate solution can be obtained by performing reverse extraction on a loaded organic phase by using a Na2CO2+NaOH solution, and the sodium vanadate solution is crystallized and then calcined to obtain the vanadium pentoxide of which the purity is more than 99%; depositing vanadium by directly using a reverse extraction solution without purification; and returning extraction raffinate to the production flow directly. By adopting the method, a process of crystallizing first and then extracting vanadium in the conventional process is improved, the extraction reaction speed is high, the time is short, and the efficiency is improved; and vanadium is separated from impurities such as Si and P in the process of extraction and washing, and the recovery rate of vanadium is more than 99%.

The invention discloses a display module, a cutting method of the display module and a display device. The display module, the cutting method of the display module and the display device are used forimproving the collecting efficiency of waste materials cut from the display module, and therefore the influences of the waste materials on the subsequent technology are lowered. The cutting method ofthe display module includes the steps that before cutting is conducted on a removing area of the display module, the set area in the removing area is coated with magnetic glue; the removing area is cut, and the waste materials are obtained; and a magnet in a collecting groove is used for attracting the magnetic glue, and therefore the waste materials are collected.

The invention discloses a device and method for preparing benzene and xylene from methylbenzene and heavy aromatics. Methylbenzene, heavy aromatics and hydrogen are preheated and then sent to a reactor, a reaction product is cooled and then divided into a gas-phase material flow and a liquid-phase material flow in a gas-liquid separating tank, the gas-phase material flow is refrigerated through a low-temperature reformate heat exchanger and a refrigerator and then enters a frozen contact tank, foreign matter in hydrogen after reaction is removed, and hydrogen is boosted through a compressor and then is recycled; the liquid-phase material flow in the gas-liquid separating tank is subjected to heat exchange and then enters a stripping tower, bottom liquid fractions in the stripping tower enter a benzol stripper to be rectified so that benzene can be obtained, and then enter a methylbenzene tower to be rectified so that methylbenzene can be recovered, and re-feeding is conducted; bottom liquid of the methylbenzene tower enters a xylene tower to be rectified so that xylene can be obtained, and bottom heavy aromatics in the xylene tower are sent to a raw material inlet for re-feeding. By the adoption of the device and method, on the premise that the concentration of reaction hydrogen and partial pressure are maintained, new hydrogen supplement and influences on follow-up processes are reduced, and total recovery of methylbenzene and heavy aromatics is achieved on the premise that benzene and xylene with high purity are obtained.