39results about How to "No by-products" patented technology

The invention relates to a modified silver-loaded zirconium phosphate powder, which is prepared by the following method: fully mix the silver-loaded zirconium phosphate powder and a crystallization accelerator of 3 to 20 wt% of its weight, and mix it uniformly in a place where the volume content of oxygen is more than 5v%. It is obtained by firing at 800-1100°C for 1-5 hours in an oxygen atmosphere. Described crystallization accelerator is MgO or ZnO or can generate the compound of this oxide compound when roasting, and B 2 o 3 or a mixture of compounds capable of forming this oxide upon firing, B 2 o 3 The molar ratio to MgO or ZnO is 0-0.3. The modified zirconium phosphate silver-loaded powder can be stored in the air for a long time, and does not change color when mixed with resin, which fundamentally improves the problem of discoloration of the zirconium phosphate silver-loaded powder when it is used in industries such as textiles, plastics, and papermaking; and the present invention The preparation method provided has simple procedures, easy industrial production, no by-products and no pollution to the environment. At present, it has been applied in Shanghai, Hunan and other enterprises, and the product quality is excellent.

The invention discloses petroleum sulfonic acid and salt thereof as well as a preparation method and application thereof. The petroleum sulfonic is prepared by the following method: causing petroleum fractions and nonylphenol polyethenoxy ether to carry out sulfonation reaction to obtain the petroleum sulfonic acid, wherein the distillation range of the petroleum fractions is more than 280 DEG C under normal atmosphere, is preferably between 280 and 600 DEG C. The petroleum sulfonate is prepared by the method comprising the following steps: 1) preparing the petroleum sulfonic acid by the method for preparing the petroleum sulfonic acid; and 2) neutralizing the petroleum sulfonic acid obtained in step 1) with an alkali solution to pH value of between 7 and 9, and then obtaining the petroleum sulfonate. The petroleum sulfonate prepared by the method can reduce oil water interfacial tension to between 10<-2> and 10<-3> mN / m, has good universality for improving recovery ratio for different crude oil systems, and can be used as an oil displacement agent in oil extraction.

The present invention discloses a method for carrying out addition on olefin and fluorine gas by using a microchannel reactor, wherein C2-C9 olefin or fluoroolefin reacts with F2 in a microchannel reaction module to obtain the corresponding fluoroalkane. According to the present invention, with the method, the purity of the prepared fluoroalkane is high, and the method has the cost advantage.

The invention discloses a novel flue gas denitrification device of a CO waste heat boiler. The unloading compressor unloads and compresses the liquid ammonia transported by trucks; the ammonia storage tank is located below the unloading compressor; The ammonia tank is connected; the ammonia buffer tank is connected to the ammonia evaporator through pipelines; the inlet of the ammonia dilution tank is connected to the ammonia storage tank, the ammonia buffer tank and the ammonia evaporator; the ammonia / air mixer is located under the ammonia buffer tank and connected to Ammonia injection grid; the CO waste heat boiler is connected to the ammonia injection grid through pipes, and the SCR reactor is located above the CO waste heat boiler and communicated with the CO waste heat boiler. In the present invention, SCR and waste heat boiler are combined for the first time for denitrification of FCCU; the SCR catalytic reactor module is directly placed on the upper layer of waste heat boiler, so that the entire SCR is compactly arranged, the floor area is reduced, and investment is reduced; the denitrification efficiency is high , High technology maturity, good utilization rate of reducing agent, little oxygen in exhaust gas participates in reaction, small heat release, no by-products and no secondary pollution.

The invention discloses a decolorizing method of (meth)acrylic acid. The decolorizing method is characterized by employing a falling film crystallization technology. The used technology comprises the following steps: a) adding 90-95wt% of acrylic acid or methacrylic acid mother liquor into a crystallizer in accordance with the capacity of the crystallizer; b) starting a freezer, and then operating the crystallizer under required temperature and pressure conditions; c) circulating the acrylic acid or methacrylic acid mother liquor at a certain rate, and cooling for crystallization; d) melting the crystallized part, and cutting the residual liquid in a certain ratio; e) adding 75wt% of polymerization inhibitor (150+ / -20 ppm) when the melting of the crystallized part is soon finished; f) completely melting the crystal, cutting the residual liquid in a certain ratio, adding the remaining 25wt% of polymerization inhibitor (50+ / -20 ppm), and returning the obtained product to a raw material tank; and g) repeating the above steps from a) to f) for secondary crystallization, and conveying the obtained product into a finished product tank. The decolorizing method has the advantages of high efficiency, low energy consumption, no byproduct generation, no pollution and the like.

The invention relates to a tube bundle TiOF 2 A low-temperature preparation method, which uses tetra-n-butyl titanate as a precursor, and adopts an improved sol-gel method to prepare tubular TiOF under low temperature and normal pressure conditions. 2 , Tubular TiOF 2 The specific surface area is large, and the crystal grains are small, the degradation performance to rhodamine B (RhB) is good, the reflectivity is low in the visible light wavelength range of 380-780nm, and the response is good, and the preparation method of the present invention is simple, the reaction conditions are mild, It has no by-products and has good application prospects.

A production method of laurolactam, in the presence of a solvent a, the oximation reaction is carried out with cyclododecanone and Raschig liquid as raw materials; the oil phase obtained by liquid separation is removed by pressure distillation and the solvent is recovered, and the obtained Molten cyclododecanone oxime is dissolved in solvent b, and undergoes Beckmann rearrangement reaction under the catalysis of rare earth metal-modified magnetic solid superacid catalyst c, and the laurolactam product is obtained after refining.

The invention relates to a silicon calcium phosphate nanopowder, a preparation method and an application. The preparation method includes: mixing the calcium source with the first liquid phase dispersant to prepare a calcium source dispersion system, then adding the silicon source dropwise, and dispersing evenly to obtain a calcium-silicon mixed liquid; mixing the phosphorus source with the second liquid phase dispersant , to be prepared into a phosphorus source dispersion system; the phosphorus source dispersion system is added dropwise to the calcium-silicon mixed solution, and the mixed system containing the calcium-silicon mixed solution and the phosphorus source dispersion system is ultrasonically treated during the dropping process, and the addition ends Afterwards, ultrasonic treatment is continued; the mixed system after ultrasonic treatment is filtered, washed, and dried to obtain a silicon calcium phosphate precursor; the silicon calcium phosphate precursor is calcined to obtain silicon calcium phosphate nanopowder. The silicon calcium phosphate nanometer powder obtained by the method has high purity, nanoscale particle size, low degree of agglomeration, good dispersion, low calcining temperature, cheap raw materials, simple operation, no by-products, and easy industrial production.