5results about How to "Good deoxygenation" patented technology

The invention discloses a catalyst composition, a preparation method and application of the catalyst composition in preparation of light aromatic hydrocarbon by biomass cracking. The catalyst composition comprises a first catalyst and a second catalyst, the first catalyst comprises Fe-modified dolomite particles, the second catalyst comprises a La-modified molecular sieve, the Fe-modified dolomite particles are formed by mechanically mixing and sintering an iron-containing raw material and the dolomite, and the La-modified molecular sieve is a La-modified molecular sieve. The content of Fe in the Fe modified dolomite particles is 4-8 wt%; the La modified molecular sieve is formed by sintering a molecular sieve impregnated with lanthanum nitrate, and the La content in the La modified molecular sieve is 3-8 wt%. The catalyst composition for preparing light aromatic hydrocarbon by biomass cracking has the advantages of high content of light aromatic hydrocarbon in the product and the like.

The present invention addresses the problem of providing an Fe-Ni-Cr alloy for sheath pipes of sheathed heaters, said Fe-Ni-Cr alloy having excellent oxidation resistance, corrosion resistance and weldability and being able to be used in a wet high-temperature environment. The problem is solved by an Fe-Ni-Cr alloy which contains, in mass%, from 0.001% to 0.050% of C, from 0.18% to 1.00% of Si, from 0.20% to 0.80% of Mn, 0.030% or less of P, 0.0001% to 0.0020% of S, from 12% to 21% of Ni, from 18% to 24% of Cr, from 0.20% to 1.50% of Mo, 0.30% or less of Cu, from 0.10% to 0.70% ofAl, from 0.10% to 0.70% of Ti, from 0.002% to 0.015% of N, from 0.0001% to 0.0010% of B, from 0.0002% to 0.0030% of O, 0.002% or less of Ca, and from 0.0010% to 0.0150% of REM in total, said REM being composed of one or more elements selected from among La, Ce and Y, with the balance being made up of Fe and unavoidable impurities, and which satisfies formulae 1 and 2. Formula 1: 0.575 x Ni + 1.25 x Cr + 3.43 x Mo - 39 xP - 5.3 xAl - 641 xREM- 1018 x O ≥ 20.0 Formula 2: 1.5 x Mn + 41.3 x Si + 1469 x S - 1.67 xAl-1.34 x Ti - 150 x O - 620 x REM≥ 5.0 Selected figure: Fig. 1

This invention discloses a method for controlling inclusions in titanium-containing ultra-low carbon steel. The steelmaking process is as follows: converter process – LF process – RH process – slab continuous casting process. After aluminum deoxidation and alloying in the RH process, low-reactive slag is added. As the vacuum molten steel circulates, this slag floats to the surface and remains at the steel-slag interface, hindering oxygen transfer from the ladle slag to the molten steel. Simultaneously, this substance has the ability to adsorb inclusions in the steel. By controlling the process parameters of the RH process, oxygen transfer from the ladle slag to the molten steel is effectively prevented, avoiding secondary oxidation of titanium and aluminum elements in the deoxidized steel and controlling the inclusion content in the steel. This invention's control method effectively prevents oxygen transfer from the ladle slag to the molten steel and avoids secondary oxidation of easily oxidized elements such as titanium and aluminum in the deoxidized steel, resulting in significant economic and social benefits.

The invention discloses a wear-resistant metal composite hammerhead and a preparation method thereof, and belongs to the technical field of preparation of mechanical equipment crusher hammerheads. Comprising the following raw materials in percentage by weight: 20%-32.5% of scrap steel, 21%-26% of pig iron, 1%-3% of rare earth ferrosilicon alloy, 28%-36% of ferrochromium alloy, 8%-12% of ferrotitanium alloy, 4%-7% of high-carbon manganese steel and 0.5%-1% of a modified alterant. According to the invention, the wear resistance of the metal composite hammer head is improved through the synergistic cooperation of rare earth, chromium, titanium, manganese and the modified alterant.

The present application relates to the technical field of biomass energy conversion, and particularly relates to a device for preparing bio-crude oil through continuous hydrothermal liquefaction of biomass, which comprises a pretreatment unit, a hydrothermal reactor, a gas-solid-liquid separator and an oil-water separator connected through pipelines in sequence, and further comprises a catalyst circulation unit for converting solid residues into catalysts, the catalyst circulation unit comprising an activation reactor and a conditioning tank connected in series, the activation reactor being connected in parallel to a feed pipeline of the hydrothermal reactor, and the conditioning tank being connected in parallel to a solid outlet of the gas-solid-liquid separator. According to the present application, the solid residues are converted into catalysts, so that the catalysts are high-performing, the catalysts are recycled during hydrothermal liquefaction, and the bio-crude oil is further upgraded.