592results about How to "Improve surface condition" patented technology

The invention discloses a regenerating method and a regenerating device for a selective catalytic reduction de-nitration catalyst. In the regenerating method, the industrially applied poisoned SCR (Selective Catalytic Reduction) de-nitration catalyst is subject to ultrasonic pretreatment, de-ionized water rinsing, chambering agent soaking, high-temperature high-pressure evaporation, active material activation and burning in sequence, thereby regenerating the catalyst. The regenerating device comprises a purging pool, a soaking cleaning pool, a high-pressure kettle, an oscillation water bath kettle, a drying box and a muffle furnace. The regenerating method and the regenerating device have the advantages that pore channels are loosened, the pore structure of the catalyst is obviously optimized, the surface appearance of the catalyst is obviously improved, the activity of the regenerated catalyst is greatly promoted, the practical running demand in industry is met, the raw material is easily acquired in the regeneration process, the process is simple, and the production cost of the enterprise using the SCR de-nitration catalyst is greatly lowered.

The invention provides a method for improving the strength of glass. The method comprises the following steps: performing chemical strengthening on the glass; and performing mechanical polishing on atleast one surface of the glass after the chemical strengthening. According to the method for improving the strength of the glass, the strength of the glass can be greatly improved and reliably maintained only by removing a defective layer in a certain thickness on the surface of the strengthened glass; and the method has simple operation and convenient control, and is convenient for industrialized production. In addition, the method effectively reduces a defective part on the surface of the glass by performing the mechanical polishing, can better improve the strength of the glass without performing chemical strengthening repeatedly on the glass, and reduce the corrosion to the glass and the damage to the optical performance of the glass by chemical drugs so that the glass has better luster and transmittance. The glass strengthened by the method provided by the invention is particularly suitable for a mobile phone display window.

The invention discloses a catalyst used in a coal natural gas methanation reactor. The catalyst comprises the following components in percentage by weight: 10-40% of an active component, 40-75% of a carrier, 5-20% of a first auxiliary agent, 2-15% of a second auxiliary agent and 2% of graphite, wherein the active component is NiO; the carrier is Al2O3; the first auxiliary agent is one or two of rare earth metal oxide La2O3, CeO2 or Sm2O3; and the second auxiliary agent is CuO. The preparation method of the catalyst comprises the following steps: preparing a mixed solution, heating and precipitating, filtering the precipitate, washing a filter cake, drying, baking and shaping. The obtained catalyst has the advantages of simple components, low cost, good catalytic activity and high stability, and is easy to prepare.

The present invention relates to foamed polyolefin resin beads. Further, the present invention provides foamed resin beads obtained by foaming and expanding composite resin beads which include a core layer constituted by a polyolefin resin and a covering layer which covers the core layer constituted by a polyolefin resin, wherein (a) the polyolefin resin constituting the core layer is a crystalline polyolefin resin, (b) the polyolefin resin constituting the covering layer is a crystalline polyolefin resin which has a lower melting point (B) than a melting point (A) of the polyolefin resin constituting the core layer, wherein a temperature difference [(A)−(B)] between the melting point (B) and the melting point (A) is more than 0° C. and 80° C. or less, or a noncrystalline polyolefin resin which has a softening point (C) lower than the melting point (A) of the polyolefin resin constituting the core layer, wherein a temperature difference [(A)−(C)] between the softening point (C) and the melting point (A) is more than 0° C. and 100° C. or less, and 10% by weight or more and less than 50% by weight of polymer type antistatic agent is contained in the covering layer. The foamed polyolefin resin beads of the present invention provide foamed polyolefin resin beads are excellent in fusion properties between beads at the time of molding in a mold, capable of providing a molded foamed article which is excellent antistatic performance, has no deterioration of the antistatic performance with age, whose antistatic performance is not humidity dependent, does not contaminate packaging products, has a good molded foamed article surface, and has excellent mechanical properties.

Provided are a diamond sintered body having higher strength and more excellent wear resistance than a conventional diamond sintered body, and a method for producing such a diamond sintered body. The diamond sintered body includes diamond particles, a binder, and a void. The diamond particles have a content of not less than 80% by volume but less than 98% by volume. The binder includes a solid solution containing at least one element selected from a group consisting of titanium, zirconium, vanadium, niobium, and chromium, carbon, and tungsten, as well as an iron group element. Neighboring ones of the diamond particles are bonded to one another. The method provides such a diamond sintered body.

Provided is a polyarylene sulfide resin molded article having a good surface state which can be molded at a significantly high crystallization speed without impairing heat resistance, mechanical properties, chemical resistance, dimensional stability and flame retardancy of polyarylene sulfide resins. The resin composition comprises (A) 100 pts. wt. polyarylene sulfide resin, (B) 0.1-10 pts. wt. aromatic phosphate of a specific structure, and (C) 3-35 pts. wt. polyphenylene oxide resin.