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465results about How to "Efficient modification" patented technology

Method for modifying biomass cracked oil to modified bio-oil by quality-improving of esterification and etherification

InactiveCN101381611AImprove conversion rateIncrease the rate of etherification reactionLiquid hydrocarbon mixture productionViscous liquidAlcohol
The invention discloses a method for modifying biomass cracking oil to modified biomass oil through esterification, etherification and quality-improvement. The method comprises the following: step one, according to the proportion that the mass ratio of biomass cracking oil to benzyl chloride to alkaline solution to low-carbon alcohol is 100 to 80-100 to 40-80 to 10-20; and the biomass cracking oil, the low-carbon alcohol, the benzyl chloride and the alkaline solution are added into a reaction kettle, are heated at the temperature of between 90 and 110 DEG C to an infinite reflux state and react for 5 to 8 hours. Step two, after the infinite reflux reaction is finished, the mixture is cooled, condensed and layered; the lower layer is clear and transparent aqueous solution; black oil phase on the upper layer is separated, and is distilled under the condition that the temperature is 80 DEG C and the pressure is 10 kilopascal; low-carbon alcohol and water in oil phase are removed; the residual mixture is distilled under the condition that the temperature is between 130 and 150 DEG C and the pressure is 10 kilopascal; the unreacted benzyl chloride is reclaimed to obtain a product of black viscous liquid; and according to the proportion that the mass ratio of the product to ethanol is 3 to 1, the black viscous liquid is diluted and dissolved to obtain the modified biomass oil of which the PH value is between 5 and 7, the density is between 1.0 and 1.1 g/cm<3>, the water content is between 0.5 and 1.0 percent, the thermal value is between 25.0 and 35.0 kJ/g and the viscidity is between 135 and 150 mm<2>/s.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY

Method for preparing premelted refining slag by using converter slag and aluminum slag

The invention relates to a method for preparing premelted refining slag by using converter slag and aluminum slag, which comprises the following steps: selecting raw materials according to the requirement that the content of metallic aluminum in the aluminum slag is greater than or equal to 20% in mass percent; proportioning the raw materials under the condition that the mass ratio of the converter slag to the aluminum slag is (2.0-2.5):1; controlling the smelting temperature of the premelted refining slag at 1500-1600 DEG C, adding the aluminum slag in three batches after the converter slag is completely molten down, and standing for 20-30min after the last batch of aluminum slag is added and stirred uniformly, thereby realizing the purpose of separating slag from iron in a molten pool; and cooling the prepared premelted refining slag to the normal temperature, crushing the prepared premelted refining slag to the particles of which the particle size range is within 5-30mm, and then, packaging the particles. On the basis of ensuring the refining effect, the method of the invention completely uses industrial slag materials as raw materials, thereby protecting the natural mineral resources, widening the utilization ways of the converter slag and the aluminum slag as resources, and partially realizing the cyclic utilization of the converter slag in iron and steel production processes.
Owner:NORTHEASTERN UNIV

Permissioned blockchain constructing and controlling method based on Chameleon hash function

The invention discloses a permissioned blockchain constructing and controlling method based on a Chameleon hash function, wherein the method relates to the field of network security technology. The method comprises the following steps of 1, defining a blockchain control mechanism and initializing the permissioned blockchain according to the blockchain control mechanism; 2, packing transaction records of a block in the network for forming a new block, and adding the new block into the permissioned blockchain; and 3, monitoring the blocks in the permissioned blockchain according to the blockchain control mechanism, and controlling the blocks which do not accord with the blockchain control mechanism. The permissioned blockchain constructing and controlling method realizes global real-time monitoring of all nodes to malicious information and error transaction information on the block; any accessing node can report the error block to the verifying node; controlling of the whole permissionedblockchain by the verifying node is realized through constructing the permissioned blockchain; In a partially de-centering environment, controlling of the permissioned blockchain is realized. All verifying nodes perform effective modification on the blocks through calculating Chameleon hash collision and DBFT consensus, thereby realizing high safety and high controllability of the permissioned blockchain.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
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