37results about How to "Eliminate the refining process" patented technology

The invention provides a cast high chrome iron or cast high chrome steel roller used to roll weld steel tube and on straight-slim welding steel tube roller, or the like, wherein the cast high chrome iron roller comprises C in 1.8-2.8%, Si <=1.0%, Mn <=1.0%, P<=0.05%, S<=0.05%, Cr in 12-22%, Ni in 0.5-3.0%, Mo in 0. 0%, Ti in 0-0.3%, V in 0-1.0%, Cu in 0-1.0%, RE in 0.01-0.5%, and the left is Fe. The inventive roller has uniform organism, high abrasion resistance and flexibility, while its service life is 2-5 times of general product and material utilization can reach 70% or 80%, with low cost.

The invention relates to a static mixed rotational flow separation and extraction process of regenerative base oil N-methyl pyrrolidone, comprising the following steps in sequence: (a) carrying out sedimentation of used oil and removing moisture and solid impurities; (b) filtering by a filter, and removing tiny solid particles and colloids; (c) adding sodium hydroxide solution and flocculating; (d) removing floccules and residual sodium hydroxide solution; (e) carrying out reduced pressure distillation by a distiller, and collecting distillate oil; (f) mixing the distillate oil with organic solvent by a static mixer on line; (g) separating out raffinate oil and raffinate oil containing organic solvent from mixed liquor by a swirler; (h) carrying out the reduced pressure distillation on the raffinate oil by a climbing film evaporator, and removing the organic solvent in the raffinate oil; and (i) carrying out the reduced pressure distillation by a molecule (short range) distiller, removing residual organic solvent and peculiar smell gas, and obtaining the regenerative base oil. The separation and extraction process provided by the invention has the advantages of conciseness in procedure, safety in operation, less equipment investment, high product yield, energy conservation, environmental friendliness and the like.

The present invention provides a purifying method for abiraterone acetate. According to the method, phosphoric acid is adopted as a salt forming reagent to react with a abiraterone acetate crude product to obtain a light yellow crystal, wherein the light yellow crystal is the abiraterone acetate phosphate, is easily filtered, and has the purity more than 98%, the abiraterone acetate phosphate can be used for the next reaction without further purification to prepare the abiraterone acetate, and the purity of the abiraterone acetate prepared by freeing can be more than 98%; the purification process is simplified, the production cost is reduced, and the method is suitable for industrial production.

The invention provides an R-(-)-atomoxetine hydrochloride preparation method, which comprises: preparing 3-methylamino-1-phenyl-1-propanol by using 1-phenyl-2-propenyl-1-one as a starting raw material, carrying out etherification on the 3-methylamino-1-phenyl-1-propanol and o-halo toluene in an inorganic alkali environment, splitting with L-(+)-mandelic acid to obtain R-(-)-tomoxetine-S-(+)-mandelate, refining the R-(-)-tomoxetine-S-(+)-mandelate, and carrying out hydrochloride forming to obtain the R-(-)-atomoxetine hydrochloride. According to the present invention, the method eliminates theoxalate refining step so as to reduce the reaction step, has advantages of cheap and easily available raw materials, less side reactions, low toxicity of the reaction solvent, high yield, high purity,low cost and the like, and is suitable for industrial production.

The invention relates to acetic ether hydrogenation catalyst and a technological method. The acetic ether hydrogenation catalyst is used to mainly solve the problem that an acetic ether conversion rate and ethyl alcohol selectivity are lower in the prior art. The acetic ether hydrogenation catalyst is prepared from copper of copper oxide, a second component, a third component and a fourth component, wherein the mass content of the copper or the copper oxide is 20 to 70%, the mass content of the second component is 15 to 60%, the mass content of the third component is 1 to 40%, and the mass content of the fourth component is 1 to 20%; the second component is zinc oxide; the third component includes at least one of La2O3, CeO2, ZrO2, Fe2O3, MgO, MnO, B2O3 and K2O; the fourth component is CaO. The technical scheme of the technological method better solves the problem, and the acetic ether hydrogenation catalyst can be applied to acetic ether hydrogenation.

The invention relates to a novel continuous production method of phenylenediamine. The method comprises the steps of nitrification, ammonolysis, reduction, rectification and the like. According to themethod, the reaction steps are reduced, and the intermediate refining process is omitted, so that the production procedure is simplified, the production cost is reduced, the working efficiency is greatly improved, the loss is reduced, the rectification requirement is reduced, the product is easier to separate, the energy consumption is reduced, and finally, the high-purity phenylenediamine product is obtained at high yield.

The invention provides a polyurethane foam stabilizer and a preparation method. The preparation method comprises the following steps of synthesizing of silicone oil with low hydrogen content, synthesizing of unsaturated polyether, synthesizing of isocyanate-terminated unsaturated polyether, and reacting of the silicone oil with low hydrogen content and the isocyanate-terminated unsaturated polyether, so as to obtain the polyurethane foam stabilizer. The preparation method has the advantages that the unsaturated polyether-terminated polyester uses isocyanate as a end-capping reagent, the usage amount is less, the reaction time is short, the waste salt is not produced, the product quality is stable, and the cost is low; the reaction activity is strong, the property is excellent, the problem of existence of terminating in the existing alkyl terminating and unsaturated polyether is solved, and the variety of the existing polyurethane foam stabilizer is enriched by adjusting the type of the isocyanate end-capping reagent.

The invention relates to the field of smelting and in particular relates to a method for producing a strontium-silicon alloy by utilizing high-purity ferrosilicon powder. The method comprises the following steps: preparing raw materials comprising high-purity silicon powder with the purity of 73-75% and metal strontium having the purity of more than 99%, wherein the total content of aluminum and calcium in the silicon powder is less than 0.05% of the total weight of the silicon powder; smelting the high-purity silicon powder, namely performing random layered feeding in an induction furnace crucible until the raw material is totally molten; adding a dreg remover, stirring, polymerizing to remove the surface residues; adding the metal strontium in blocks, and uniformly stirring; enabling thesolution to flow out of an ingot mold after mixing, clipping out when the surface is dark red, transporting to a processing workshop for crushing, screening, and packaging the finished product. Sincesmelting electricity for high-purity ferrosilicon is saved, the cost is greatly reduced. Finally, the obtained material has the components that the content of Si is equal to 72-75%, the content of Sris equal to 0.6-2.2%, the content of Al is equal to 0.1%, and the content of Ca is equal to 0.1%.

The invention relates to a method for adding the grain refinement element Ti into cast aluminum silicon alloy. The method comprises the following concrete steps: (1) calculating the usage amount of titanium salt according to the demand of the titanium content in the cast aluminum silicon alloy, weighing and drying for 2-3 h in a constant temperature preheating and drying furnace with a temperature of 200-300 DEG C; (2) when the temperature of a cast aluminum silicon alloy melt reaches 700-760 DEG C, adding the preheated titanium salt into the surface of the aluminum alloy melt in a melting furnace, and stirring for 10-15 min by using a graphite stirring rod under a covering layer; and (3) fully stirring a cast aluminum silicon alloy solution, sampling to measure the components of the cast aluminum silicon alloy solution, and when the Ti content in the cast aluminum silicon alloy is close to the theoretical calculation value, removing dross generated on the surface from the melt, so as to achieve the effects of adding the Ti into the aluminum alloy solution, refining and removing calcium. According to the method, powdery potassium fluotitanate is selected as a refinement element for refinement and calcium removal of the aluminum alloy melt, the steps of preparing intermediate alloy, refining and degassing are removed, and the energy-saving and emission-reduction effects in the production process are achieved.

The invention relates to a converter vacuum steelmaking method comprising the steps that: the converter is leaned forward by 15-20 DEG, and iron blending is carried out; the converter is leaned forward by 20-30 DEG, and scrap steel is added; the converter is swung to a blowing position; a vacuuming device is started; the pressure above molten steel in the converter is reduced to 1.33*10<-1> Pa to 133.3Pa; oxygen blowing and smelting are carried out; the vacuuming device is turned off, and sampling and temperature measuring are carried out; and furnace turning and discharging are carried out. With the method, contents of gases such as nitrogen, hydrogen, oxygen, and the like in molten steel can be effectively removed, such that decarbonization and deoxidation reactions can be promoted, metal and non-metal impurities can be reduced, molten steel purity can be improved, and product quality can be improved.

The invention belongs to the technical field of casting silicon-aluminum alloy, and particularly relates to a method for reducing microporosity of casting silicon-aluminum alloy. The method comprisesthe following steps that raw materials are prepared, the raw materials are added into a melting pool at 740 DEG C for melting, after keeping 5-10 minutes, the raw materials are heated up to 800-820 DEG C; when the raw materials are cooled down to 650-670 DEG C, acetic anhydride with the weight counting for 0.8-1.2% of furnace burden is added, slagging-off, discharging from a furnace and casting are carried out after treatment for 6-10 minutes, and heat treatment is carried out after the casting is completed. Compared with the prior art, the method has the following advantage that through scientifically proportioning the content of each element, refining process of a refining agent is omitted, the fluidity of the materials is improved by introducing nitrogen, the problem that the casting performance is lowered due to the content of silicon is solved, addition of dysprosium can effectively reduce the microporous rate of the alloy, surface tension of the alloy during the casting process is improved, and the mechanical properties of the alloy are improved.