6results about How to "Improve anti-sintering" patented technology

The invention discloses an anti-sintering copper oxide / cerium dioxide catalyst and a preparation method thereof, soluble cerium salt is directly impregnated on metal copper salt or copper oxide based on an impregnation method, and the high-activity and anti-sintering copper oxide / cerium dioxide catalyst is obtained through drying and roasting activation. In the preparation process, a unique layered cerium dioxide nanosheet structure is formed, and copper oxide particles are constrained in a layered cerium dioxide nano gap layer through a layered spatial constraint effect; in addition, due to the interaction between the layered cerium dioxide nanosheets and the copper oxide particles and the space intervals between the layered cerium dioxide nanosheets and the copper oxide particles, the sintering phenomena of aggregation, growth and the like of the copper oxide particles and the layered cerium dioxide nanosheets at high temperature are limited; compared with a catalyst prepared by an existing impregnation method, the catalyst prepared by the invention has more excellent activity and sintering resistance, is safe and simple to operate, is low in cost and is easy to industrialize.

The invention discloses preparation and application of a hydrocarbon reforming hydrogen production catalyst for a direct reduction iron process. The catalyst contains 60-80% of a carrier, 10-15% of an active component I, 5-10% of an active component II, 1-5% of an anti-carbon additive, 3-10% of a structural additive and 1-3% of an electronic additive. The prepared catalyst has the advantages of high strength, high activity, carbon deposition resistance, excellent sintering resistance and high stability, the heat transfer function of the catalyst is improved due to the abundant pore structure, the surface temperature is reduced, and carbon deposition is reduced. The prepared catalyst is suitable for a CO2-supplementing reforming hydrogen production process of natural gas with a low water-carbon ratio in gas-based direct reduction iron, can be applied to an MIDREX process and a gas reduction process of an equal hydrogen-based shaft furnace, can be used under harsh conditions such as low-carbon hydrocarbon water vapor reforming and CO2 reforming hydrogen production, and is high in methane one-way conversion rate and CO2 one-way conversion rate.

The application discloses a nitrogen-oxygen sensor oiling equipment, and belongs to the field of sensor production equipment.The oiling equipment comprises a base and a vertical plate fixedly arranged at the upper end of the base, a through hole for the nitrogen-oxygen sensor to pass through is formed in the vertical plate, and a hexagonal groove is formed in the front side of the through hole; the oiling equipment further comprises an oiling mechanism, the oiling mechanism comprises an oil storage tank arranged at the rear side of the vertical plate and perpendicular to the axis of the through hole, an electric push rod fixedly connected at one end of the oil storage tank, and an oil pump fixedly installed at the output end side of the electric push rod and in communication with the oil storage tank, the output end of the oil pump is fixedly connected in communication with a spray head, and the output end of the electric push rod is fixedly connected with a soft-bristle brush.The automatic and uniform application of anti-sintering grease to the threads of the nitrogen-oxygen sensor can be realized, the problems of grease accumulation and uneven distribution during manual application are effectively avoided, grease waste is reduced, the efficiency and consistency of the oiling work are improved, and the labor intensity and human error of manual operation are reduced.

The application discloses a catalyst for continuously preparing N-(1-ethylpropyl)-3,4-dimethylaniline through hydrogenation as well as a preparation method and application thereof. The catalyst comprises a carrier, and an active metal Pt, a first additive and a second additive supported on the carrier; the first additive is one of Sb, V, Zr, Ti and W, and the second additive is one of Bi, Co, Zn, Mn and La; the content of each component in the catalyst with a mass of 100% is as follows: the active metal Pt is 0.5-5%, the first additive is 0.1-1%, the second additive is 0.05-0.2%, and the rest is the carrier. The carrier is pretreated by using the additive metal, so that the catalyst has excellent anti-sintering and anti-carbon deposition capacity in continuous operation, and has a long service life; when the N-(1-ethylpropyl)-3,4-dimethylaniline is prepared, a continuous flow fixed bed technology is adopted, and production efficiency is high.

The invention relates to the technical field of metal processing oil, in particular to extreme pressure tapping oil and a preparation method thereof. The extreme pressure tapping oil comprises the following components in percentage by mass: 26%-33% of base oil, 13%-22% of an oiliness agent, 48%-57% of an extreme pressure anti-wear agent, 0.2%-0.5% of an antioxidant and 3%-5% of an anti-rust agent, the anti-wear reagent at extreme pressure comprises a chlorine-based anti-wear reagent at extreme pressure, a sulfur-based anti-wear reagent at extreme pressure and a phosphorus-based anti-wear reagent at extreme pressure; the content of the chlorine-based extreme pressure anti-wear agent in the extreme pressure tapping oil is not less than 35wt%; and the mass ratio of the chlorine-based anti-wear reagent at extreme pressure to the sum of the sulfur-based anti-wear reagent at extreme pressure and the phosphorus-based anti-wear reagent at extreme pressure is greater than 3: 1. According to the extreme pressure tapping oil disclosed by the invention, the chlorine-based extreme pressure anti-wear additive with an extremely high proportion is used as a core extreme pressure lubricating material, the phosphorus-based extreme pressure anti-wear additive and the non-active sulfur-based extreme pressure anti-wear additive with relatively low proportions are compounded, and excellent extreme pressure lubricating capacity is realized through the synergistic effect of multiple types of extreme pressure additives.

The invention discloses an oxygen carrier derived from a metal doped / cellulose intercalated Ni-Fe-Al hydrotalcite-like compound as well as preparation and application of the oxygen carrier. The hydrotalcite-like compound capable of being assembled on the molecular level is prepared through a coprecipitation method, cellulose is introduced into the interlayer of the hydrotalcite-like compound in an interlayer insertion mode, the purpose of separating rare earth or toxic metal in waste water is achieved by adsorbing metal in the waste water, and then the rare earth or toxic metal in the waste water is separated through thermal conversion. The high-metal-dispersity cellulose intercalation hydrotalcite-like oxygen carrier doped and modified by the rare earth or the toxic metal is obtained, and the oxygen carrier prepared by the method has proper oxygen release capacity and catalytic activity due to the doping and modification effect of the rare earth or the toxic metal; and the oxygen carrier also has good fuel conversion rate, synthesis gas selectivity and carbon deposition resistance at medium and low temperatures.