10 results about "By-product" patented technology

The invention discloses a method for synthesizing sec-butyl alcohol. In the method, sec-butyl acetate and methyl alcohol are used as raw materials, sec-butyl alcohol is produced by ester exchange, and the by-product is methyl acetate. The yield of sec-butyl alcohol is 50-90%. Compared with the method for preparing sec-butyl alcohol by n-butene hydration, the method is high in reaction speed, high in conversion rate and selectivity, mild in reaction conditions and less in corrosion for equipment; and the by-product methyl acetate is also an important industrial raw material.

The invention discloses a phenol ortho-methylation catalyst and a preparation method thereof. The catalyst is an alkaline Fe/Mg compound oxide, wherein, the mol ratio of Fe to Mg is 1: (0.1-2). The preparation method comprises the following steps: mixing and dissolving soluble malysite and soluble magnesium salts into alcohols solvent according to a required proportion to prepare a solution A; adding polyethyleneglycol (PEG) into strong aqua ammonia to prepare a solution B; slowly mixing the solution A and the solution B in a cocurrent flow mode under the condition of normal temperature and ultrasound, and then going on with the ultrasound for 30 minutes; filtering, washing, drying and baking the obtained precipitation; porphyrizing the baked solid and repulverizing the solid into 10-20 mesh finely ground particles after tabletting; the finely ground particles are the catalyst. The catalyst has the advantages of high activity at low temperature, simple preparation, innocuity, good stability, high selectivity of ortho position, particularly high selectivity of orthocresol and few by-products.

The invention relates to the field of preparation of biologic oil, and provides a furfural catalytic hydrogenation method under supercritical carbon dioxide and a method for preparing catalysts. The furfural catalytic hydrogenation method under supercritical carbon dioxide comprises the steps that furfural and palladium and carbon catalysts are added to a reaction still, then the reaction still is sealed, hydrogen is introduced into the reaction still to remove the air in the reaction still, liquefied carbon dioxide is injected into the sealed reaction still through a plunger metering pump, the pressure of the carbon dioxide is made to be above the critical pressure when the carbon dioxide is in an overcritical state, furfural catalytic hydrogenation and upgrading are carried out under the overcritical condition of the carbon dioxide, and a needed liquid product is prepared. The method for preparing the palladium and carbon catalysts comprises the steps of pre-processing of a carrier and preparation of the palladium and carbon catalysts (Pd/C catalysts). In the reaction process, the catalysts have no carbon accumulation phenomenon, can be recycled, largely reduce generation of by-products, and improve the selectivity of the products.

The invention provides a method for processing bone char by taking bovine bones as an active ingredient. The method comprises the steps of: by taking bovine bones as an active ingredient, crushing, cleaning, cooking, separating grease, separating bone glue, drying and charring, thus processing the bone char. According to the method, the bone char can be processed by taking bovine bones as the active ingredient, side products including grease, bone glue, tar, acetic acid and methanol can also be obtained, and the processed bone char cannot be lost and is good in quality due to the adoption of closed charring. The method is suitably applied as a method for processing bone char.

The invention relates to high-activity wild grape wine with seeds and a preparation method thereof. The preparation method comprises the steps of preprocessing wild grapes, carrying out split charging, aerobic fermentation and anaerobic fermentation, processing grape seeds, and carrying out post-fermentation, filtration, encapsulation, sealing and after-packaging. According to the high-activity wild grape wine, high-activity anti-oxidation nutrient substances such as resveratrol and organic acid are increased, meanwhile, a deep processing and utilizing scheme is provided for by-products produced during the brewing of grape wine from grape seeds and the like, and the raw material resources are well utilized. On this basis, the specific preparation technological process is detailed, the antioxidant activity of the product and the content contrast of relevant substances are verified by virtue of subsequent detection, and meanwhile, a sensory evaluation result is matched so as to determine an optimal preparation method. The content of active components in the product is increased, meanwhile, the optimal taste and flavor of the product are guaranteed, and the product has multiple superiorities of nutrition, health, delicacy, storage resistance, easiness in production and process and the like.

The invention relates to a method for extracting iron from high-iron low-silicon type laterite ore. The method is characterized in that the laterite ore with the TFe content ranging from 40% to 50%, the SiO2 content being 0%-3% and the Al2O3 content being 8%-12% is placed into aqueous alkali, alkaline leaching reacting is carried out at 120 DEG C to 210 DEG C for 0.3 h to 6 h, reactants are filtered to obtain filter liquor and an alkaline leaching filter cake A, and the alkaline leaching filter cake A is iron ore concentrate with the TFe content ranging from 62% to 68%. The filter liquor B is fed into a recovery treatment system, and NaAlO2 in the alkaline leaching filter liquor is hydrolyzed to produce a by-product, namely Al(OH)3. By means of the method, effective separation of silicon, aluminum and iron is achieved, the grade of the iron ore concentrate is improved from 40%-50% to 62%-68%, meanwhile, the S content in the iron ore concentrate is smaller than 0.1%, and the SiO2 content and the Al2O3 content are both smaller than 1%, the content of impurities such as S, Si and Al entering a blast furnace is reduced, and the iron-making cost is reduced.

A process for removing metals from hydrocarbon oil by use of the by-product obtained in preparing fatty acid by oxidizing paraffin wax includes mixing the hydrocarbon oil with said by-product as demetalating agent, water and demulsifier, emulsifying to change the metals into water-soluble matches to be dissolved in water, and oil-water separation. Its advantage is high efficiency.

The invention provides a preparation method of picoxystrobin. The preparation method includes the following steps: reacting an alkali metal salt of 2-hydroxy-6-trifluoromethylpyridine with (E)-3-methoxy-2-(2-halomethylphenyl)-2-methyl acrylate in a solvent to obtain the picoxystrobin, wherein the alkali metal salt of the 2-hydroxy-6-trifluoromethylpyridine is prepared by a hydrolysis reaction of 2-halo-6-trifluoromethylpyridine and alkali metal hydroxide. The preparation method provided by the invention saves the use of an acid binding agent in a condensation step and avoids tedious steps suchas acidification and drying in the hydrolysis reaction. After two steps of separation, the total yield is over 82%, and the product content is 97%-98%. A by-product is only a single inorganic salt, which reduces the equipment cost of solvent recovery and saves the use of acid and alkali, thereby reducing the material cost. The preparation method is suitable for industrial production and can generate high economic benefit.