50 results about "La element" patented technology

The invention relates to a method for manufacturing a steel rail through a nano bainite material containing the rare earth La element and the steel rail. The method includes the steps that smelting is carried out, wherein smelting comprises the deoxidation and desulfuration step, the element adding step and the refining and vacuum degassing step; rolling is carried out; and cooling is carried out. According to the preparing method, as the rare earth La is added, the rare earth La and Mn, Cr and Si alloy elements will jointly strengthen the hardenability effect, and therefore the strengthening effect is improved; in addition, expensive alloy Ni is not added, grading cooling control after rolling is used in a combined manner, and therefore the strength of steel is further improved; and meanwhile, the toughness of the steel is improved through the effects of modifying inclusion, grain boundary purification, bainite wattle refining, dislocation generation promoting and the like of the rare earth in the bainite steel, and therefore the steel rail has the excellent toughness.

The invention discloses an integrally-extruded honeycomb catalyst for selective catalytic reduction (SCR) smoke denitration. The catalyst consists of the following active ingredients: 65 to 80 percent of titanium dioxide, 5 to 15 percent of ferrous sulfate, 5 to 15 percent of tungsten trioxide, 1 to 4.5 percent of vanadium pentoxide and 0.05 to 0.5 percent of lanthanum nitrate. The catalyst has the advantages of high mechanical strength, wear resistance, long service life and low cost, and the catalyst is easy to form; particularly FeSO4 is added, so that a good catalyzing effect is achieved, and a synergistic effect of FeSO4 and Ti-V-W active ingredients is also achieved; because a La element is added, structural phase transition from an anatase to a rutile is greatly restrained, a phase transition temperature is obviously increased, the catalyst can be calcined at a temperature of 800 DEG C, and the catalyst of an anatase ontology is obtained; and moreover, the catalyst has a good denitration effect, is wide in applicable temperature range, and can help to achieve a desorption efficiency of 60 to 90 percent at the temperature of between 180 DEG C and 450 DEG C.

The invention relates to a catalyst for producing ethylbenzene from benzene and ethane. The catalyst mainly solves the problem that a Pt-loaded molecular sieve catalyst used in a reaction for producing ethylbenzene from benzene and ethane has a low conversion rate. The catalyst for producing ethylbenzene from benzene and ethane comprises the following components: (a) Pt or oxides thereof; (b) oxide of Zn; (c) simple substances or oxides of La elements; (d)molecular sieve. The technical scheme can better solve the technical problem, and is used in the reaction for producing ethylbenzene from benzene and ethane.

The invention discloses a LaCl 3 molten salt mediated Ta 3 N 5 Photoanode and method for its preparation. The present invention is in low dosage LaCl 3 With the assistance of molten salt, LaCl was prepared by the traditional facile direct oxidation and nitrided Ta foil method. 3 molten salt mediated Ta 3 N 5 photoanode, which has successfully enhanced its performance for photocatalytic water splitting. The Ta 3 N 5 The photoanode has stronger absorption in the solar spectrum, and has high-efficiency photocatalytic water splitting activity. The performance improvement comes from the La element doping on the surface and LaTaON 2 Phase formation. The method of the invention has simple equipment, is easy to operate, has good photoanode crystal quality and stable performance, and is favorable for large-scale popularization and application. LaCl 3 The introduction of molten salt has brought a new look to the traditional preparation method and provided a new method for large-area, low-cost and high-efficiency photoanodes.