51results about How to "Improve the safety of production operations" patented technology

The invention relates to a method for preparing alpha-arbutin which comprises steps of preparing slope seeds, selecting culture mediums, optimizing reaction conditions and extracting products and so on. The invention employs Xanthomonas campestris to ferment to produce the alpha-arbutin without use of organic solvents during the production and generation of harmful substances during the fermentation process. The invention has advantages of low production cost, simple process, and safe operation. And the alpha-arbutin yield produced by the method is high, the alpha-arbutin content in fermentation liquor is 8-11g/L, and the conversion rate of the hydroquinone can be 91%. The alpha-arbutin can obviously inhibit activities of tyrosinase, reduce tyrosinase deposition in skins, and bleach skins, remove freckles.

The invention relates to a preparation method of silicotungstic heteropoly acid, and aims to mainly solve the problem that employment of inflammable low-boiling point organic extracting agent can result in poor production security in the prior art. The method of the invention includes the following steps of: a) dissolving sodium tungstate and sodium hydrogen phosphate in water to generate a mixed solution of phosphotungstic acid and sodium phosphotungstate under heating and acidic conditions, with the sodium tungstate and the sodium hydrogen phosphate in a weight ratio of 1:0.1-1:10; b) dissolving CnH2n+1N<+>Cl<-> in an organic solvent to obtain an organic solution of CnH2n+1N<+>Cl<->, wherein n is a positive integer from 10 to 30, and with the sodium tungstate adding amount as the reference, the adding amount of CnH2n+1N<+>Cl<-> content is 0.01-1 mol/g sodium tungstate; and c) adding the organic solution of CnH2n+1N<+>Cl<-> into the mixed solution of phosphotungstic acid and sodium phosphotungstate for reaction, then carrying out centrifugation, washing, drying and roasting on the product, thus obtaining silicotungstic heteropoly acid. The technical scheme in the method of the invention well solves the problem, and can be used in the industrial production of silicotungstic heteropoly acid.

The invention provides a compound isolating film and a formation method thereof. The method comprises the following steps of: dissolving polyethylene glycol oxide in an acetone solvent; dispersing the polyethylene glycol oxide in the acetone solvent to form a polymer solution; soaking a polyolefine microporous film in the polymer solution; taking out the soaked polyolefine microporous film; and drying the polyolefine microporous film to form the compound isolating film. In the method, the acetone solvent is used for compounding the polyethylene glycol oxide and the polyolefine microporous film; and the polyolefine microporous film is modified to obviously enhance the solution absorption capability and the ion penetrating capability of the isolating film. Moreover, the acetone solvent has low price and does not have harm basically, and therefore, the production cost is reduced and the production operating safety is enhanced.

The invention provides an oil field two-stage dehydration treatment system and method. The system comprises a control cabinet and a two-stage dehydration device, the two-stage dehydration device comprises a temperature sensor, a liquid level meter, a pressure sensor and an electric control part, wherein the temperature sensor, the liquid level meter, the pressure sensor and the electric control part are all electrically connected with the control cabinet, and the control cabinet is used for giving an alarm according to temperature, pressure and liquid level signals and controlling starting andstopping of the electric control part. The pressure transmitter and the temperature transmitter are arranged on the ball receiving barrel, so that the safety of a station yard and equipment are protected; a liquid level meter is added to the dosing device, and dosing time is mastered at any time; the first heating furnace is provided with a full-automatic combustor, so that remote automatic ignition and flameout protection are achieved, and the production operation safety of station personnel is improved; an associated gas outlet pressure remote transmission function is added to the buffer tank, and pressure remote transmission, over-limit alarm pump stopping, remote switching of the two pumps and emergency shutdown functions are added to the output pump, so that the number of times of on-site manual operation is reduced; meanwhile, a double-proportion drain valve is additionally arranged at the outlet of the associated gas separator to realize automatic drainage.

The invention discloses a multifunctional unit intelligent twisting and pulling device and method for aluminum electrolysis. The multifunctional unit intelligent twisting and pulling device comprisesa unit cart device running on an aluminum electrolysis plant warehouse track, tracks on two girders of the unit cart device are provided with a trolley device, and the trolley device is provided witha tool swing mechanism. The cart device, the trolley device and the tool swing mechanism are provided with automatic running and positioning systems. The tool swing mechanism provided with a hydraulicsystem, a measuring and positioning device and a fixing guiding frame. The fixing guiding frame is provided with a lifting servo hydraulic cylinder used for driving an anode lifting frame device anda fixture twisting head frame device to move up and down; and the anode lifting frame device is provided with a twisting head frame servo oil cylinder used for driving the fixture twisting head framedevice and a fixture twisting head to move up and down. By adopting the technical scheme, the anode changing operation efficiency can be improved, the manual operation time is shortened, the labor intensity is relieved, and the production operation safety is improved.

The invention discloses a preparation method for tobacco absolute oil. The preparation method is performed with the following devices: an ultrasonic extraction tank (1), a chromatography column (2), an air compressor (3), a concentration tank (4), a reverse resin column (5), a condenser (6), a vacuum pump (8) and a solvent recovery tank (7). The preparation method comprises the following steps: 1,subjecting a tobacco raw material to ultrasonic extraction; 2, carrying out purification through the chromatography column (2); 3, carrying out concentration; 4, carrying out purification through thereverse resin column ( 5); and 5, carrying out decompressing to remove ethanol so as to obtain the tobacco absolute oil. The devices provided by the invention can realize highly-efficient extractionand purification of the tobacco absolute oil; and the tobacco absolute oil obtained by using the preparation method provided by the invention is used in cigarettes, electronic cigarettes or heat-not-burn cigarettes, and effectively enhances and improves the suction comfort of the cigarettes, the electronic cigarettes and the heat-not-burn cigarettes.

The invention provides a method for producing fully synthetic lubricating oil by using grease as a raw material and by means of three steps of reactions. The method comprises the following steps: 1, deoxidizing the grease under the hydrogen-free condition until long-chain alkenes are obtained; 2, carrying out polymerization on the long-chain alkenes to obtain polyolefin; 3, carrying out hydrogenation on the polyolefin to obtain base oil of the fully synthetic lubricating oil; adding additives and the like into the base oil to prepare the high performance fully synthetic lubricating oil. The method provided by the invention is simple in process; the selected raw material grease comprises non-edible oil or waste catering oil, so that the raw material source is wide, the use of raw materials from fossil energy sources is avoided, and environmental pollution is reduced while the cost is lowered. The product is comb-shaped regular saturated hydrocarbon molecules containing no oxygen, has excellent properties comparable to those of polyamine oxidase (PAO), and is suitable for being used in various harsh conditions.

The invention discloses a preparation method of coffee purified oil. The following devices are used: an ultrasonic extraction tank (1), a chromatographic column (2), an air compressor (3), a concentrating tank (4), a reverse resin column (5), a condenser (6), a vacuum pump (8) and a solvent recycling tank (7). The preparation method comprises the following steps: (1) ultrasonically extracting coffee raw materials; (2) purifying through the chromatographic column (2); (3) concentrating; (4) purifying through the reverse resin column (5); and (5) removing ethanol under reduced pressure to obtainthe coffee purified oil. The coffee purified oil can be effectively extracted and purified by the device, the obtained coffee purified oil is used for cigarettes, electronic cigarettes or cigarettesnot combusting after being heated, and the smoking comfort level is effectively improved.

The invention discloses a preparation method of red jujube clean oil, which uses the following devices: an ultrasonic extraction tank (1); a chromatographic column (2); an air compressor (3); a thickening tank (4); a reverse resin column (5); a condenser (6); a vacuum pump (8); a solvent recovery tank (7). The method includes the steps of (1) ultrasonic extraction of red jujube raw material; (2),purifying by chromatographic column; (3); concentration; (4) purifying by a reverse resin column; (5) removing ethanol under reduced pressure to obtain the pure red jujube oil. The device of the invention can efficiently extract and purify the red jujube clean oil, and the obtained red jujube clean oil can be used in cigarette, electronic cigarette or heated non-combustible cigarette, so as to effectively improve and improve the smoking comfort of the cigarette.

The invention discloses the preparation of alkaline water and particularly relates to a system and a method for preparing alkaline water used for preparing a flocculating agent for use in a red mud sedimentation separation and washing process step in an aluminum oxide production process. The system for preparing alkaline water used for preparing the flocculating agent comprises the following structures: a red mud washing liquid tank and a freshwater tank, wherein the red mud washing liquid tank is connected with a qualified alkaline water tank through a combined pipe; and the fresh water tank is connected to the combined pipe through a pipe. The system has the advantages that the substitution of red mud washing liquid for the alkaline liquid eliminates the use of high-concentration alkaline caustic liquid and improves the safety of production operation. The preparation of the alkaline water by using the red mud washing liquid allows for full utilization of the original heat energy of the red mud washing liquid and ensures the temperature can reach a temperature required by qualified alkaline water after the red mud washing liquid is diluted; therefore steam for raising temperature is not required to be added and energy consumption is lowered. The flocculating agent preparation process step is usually performed in a red mud separation and washing area, so as that the preparation of the alkaline water by using the red mud liquid has the advantages of short transport distance and low kinetic energy consumption.

The invention discloses a preparation method for dried orange peel absolute oil. The preparation method is performed with the following devices: an ultrasonic extraction tank (1), a chromatography column (2), an air compressor (3), a concentration tank (4), a reverse resin column (5), a condenser (6), a vacuum pump (8) and a solvent recovery tank (7). The preparation method comprises the followingsteps: 1, subjecting a dried orange peel raw material to ultrasonic extraction; 2, carrying out purification through the chromatography column (2); 3, carrying out concentration; 4, carrying out purification through the reverse resin column ( 5); and 5, carrying out decompressing to remove ethanol so as to obtain the dried orange peel absolute oil. The devices provided by the invention can realize highly-efficient extraction and purification of the dried orange peel absolute oil; and the dried orange peel absolute oil obtained by using the preparation method provided by the invention is usedin cigarettes, electronic cigarettes or heat-not-burn cigarettes, and effectively enhances and improves the suction comfort of the cigarettes, the electronic cigarettes and the heat-not-burn cigarettes.

The invention discloses a method for preparing homopiperazine by utilizing ethyl trifluoroacetate. The method comprises the following steps: (1) taking ethylenediamine as an initial raw material; enabling the ethylenediamine to react with the ethyl trifluoroacetate under the action of an organic solvent, so as to prepare bistrifluoroacetylethylenediamine; (2) enabling the bistrifluoroacetylethylenediamine obtained by the step (1) to react with a 1,3-disubstituted propane compound under the action of a solvent and a catalyst, so as to obtain bistrifluoroacetyl homopiperazine; (3) enabling the bistrifluoroacetyl homopiperazine obtained by the step (2) to react with a hydrogen chloride ethanol solution to obtain homopiperazine bihydrochloride; recycling the ethyl trifluoroacetate; (4) enabling the homopiperazine bihydrochloride obtained by the step (3) to react with alkali under the action of a solvent and a catalyst, so as to prepare the homopiperazine. The method disclosed by the invention has the beneficial effects of simplicity and convenience for operation, relatively low cost, relatively high yield, relatively small pollution and wide applicable range, and can meet the requirements on industrial production of products.

The invention discloses a preparation method of rose absolute oil. The following devices are used: an ultrasonic extraction tank (1); a chromatography column (2); an air compressor (3); a concentration tank (4); a reverse resin column (5); a condenser (6); a vacuum pump (8); and a solvent recovery tank (7). The method comprises the following steps: 1) performing ultrasonic extraction of a rose rawmaterial; 2) performing purification by the chromatography column (2); 3) performing concentration; 4) performing purification by the reverse resin column (5); and 5) removing ethanol under reduced pressure to obtain the rose absolute oil. The device of the invention can efficiently extract and purify the rose absolute oil, and the obtained rose absolute oil is used in the cigarettes, the electronic cigarettes or the heat-not-burn cigarettes, and can effectively improve the smoking comfort.

The invention discloses a method for improving safety of ignition paper preparation. The method comprises the following steps: determining the water contents of zirconium powder, barium chloride and potassium chromate, calculating the drying weights of the zirconium powder, the barium chloride and the potassium chromate, and respectively dissolving the barium chloride and the potassium chromate into distilled water so as to obtain a barium chloride solution and a potassium chromate solution; crushing loose asbestos paper into asbestos paper pulp, adding the zirconium powder, uniformly stirringto obtain a mixed solution, sequentially and slowly adding the potassium chromate solution and the barium chloride solution, transferring the mixture into a suction filtration device, standing, and drying to obtain ignition paper. According to the invention, the use safety of the zirconium powder can be effectively ensured, the barium chloride and the potassium chromate are directly used, the pre-treatment of dangerous raw materials is avoided, the contact time of operators and toxic and harmful chemical products is shortened, the production operation safety is improved, the working efficiency of an operator is improved, the energy consumption can be reduced, the preparation working time of each batch of ignition paper is reduced by 24 hours from 68 hours, the electric energy consumptionis reduced from 544 kW * h to 192 kW * h.

The invention discloses an efficient method for preparing tree moss absolute oil. The following devices are used: an ultrasonic extraction tank (1); a chromatography column (2); an air compressor (3);a concentration tank (4); a reverse resin column (5); a condenser (6); a vacuum pump (8); and a solvent recovery tank (7). The method comprises the following steps: 1) performing ultrasonic extraction of a tree moss raw material; 2) performing purification by the chromatography column (2); 3) performing concentration; 4) performing purification by the reverse resin column (5); and 5) removing ethanol under reduced pressure to obtain the tree moss absolute oil. The device of the invention can efficiently extract and purify the tree moss absolute oil, and the obtained tree moss absolute oil isused in the cigarettes, the electronic cigarettes or the heat-not-burn cigarettes, and can effectively improve the smoking comfort.

The present invention relates to a novel process for the preparation of 4-[3-formyl-4-(4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaborol-2-yl) phenoxy] benzonitrile; and the compound is used as an intermediate for the synthesis of crisaborole. The method adopted by the invention is a non-palladium-catalyzed decarboxylation boronation method which takes carboxylic ester as a substrate and isonicotinate as a catalyst; and compared with a palladium-catalyzed coupling boronation method which takes halide as a substrate in the prior art, the method has the advantages of safety in operation, low cost, environmental friendliness and the like.

The invention discloses a cracking catalytic circulation method of three reaction cabins, which comprises the following steps: S2, heating a first reaction cabin, introducing a mixed gas composed of nitrogen and hydrogen into the first reaction cabin through a main feeding gas pipe and a three-way selection valve for reaction, opening a fourth on-off valve and a second on-off valve, and closing other on-off valves; s3, biogas is introduced into a first reaction cabin for reaction through a main feeding gas pipe, and a fourth on-off valve and a second on-off valve are kept in a clamping opening state; s4, biogas enters a second reaction cabin for reaction through a main feeding gas pipe and a three-phase selection valve, and a fifth on-off valve and a third on-off valve are opened; and taking out the carbon nanotubes in the first reaction cabin for recycling. The mass transfer efficiency of the reaction equipment is improved, and efficient utilization of raw material gas and product gas is realized. The continuous production of reaction equipment is realized, the blank time is eliminated, and the utilization rate of the equipment is greatly improved. And the fluid direction opposite to the gravity direction is adopted, so that the production operation safety is improved.

The invention discloses a preparing method of fenugreek absolute oil. Following devices including an ultrasonic extraction tank (1), a chromatographic column (2), an air compressor (3), a concentration tank (4), a reverse resin column (5), a condenser (6), a vacuum pump (8) and a solvent recovery tank (7) are used. The method includes the steps of firstly, conducting ultrasonic extracting on fenugreek raw materials; secondly, conducting purifying through the chromatographic column (2); thirdly, conducting concentrating; fourthly, conducting purifying through the reverse resin column (5); fifthly, conducting decompressing to remove ethyl alcohol to obtain the fenugreek absolute oil. By means of the devices, the fenugreek absolute oil can be efficiently extracted and purified, the obtained fenugreek absolute oil is used for cigarettes, electronic cigarettes or heated-non-combusted cigarettes, and the sucking comfort is effectively improved.