359 results about "Engineering production" patented technology

A composition comprising a plurality of cell aggregates for use in the production of engineered organotypic tissue by organ printing. A method of making a plurality of cell aggregates comprises centrifuging a cell suspension to form a pellet, extruding the pellet through an orifice, and cutting the extruded pellet into pieces. Apparatus for making cell aggregates comprises an extrusion system and a cutting system. In a method of organ printing, a plurality of cell aggregates are embedded in a polymeric or gel matrix and allowed to fuse to form a desired three-dimensional tissue structure. An intermediate product comprises at least one layer of matrix and a plurality of cell aggregates embedded therein in a predetermined pattern. Modeling methods predict the structural evolution of fusing cell aggregates for combinations of cell type, matrix, and embedding patterns to enable selection of organ printing processes parameters for use in producing an engineered tissue having a desired three-dimensional structure.

This invention describes a rapid tooling process that integrates solid freeform fabrication (SFF) with electroforming to produce metal tools including molds, dies, and electrical discharge machining (EDM) electrodes. An SFF part is metalized by electroless plating and then placed in an electroplating solution, where metal is deposited upon the part by electrolysis. When the desired thickness of metal has been reached, the SFF part is removed from the metal shell. The shell is then optionally backed with other materials to form a mold cavity, and EDM electrode, or other desired parts for tooling. Thermomechanical modeling and numerical simulation with finite element analysis (FEA) is used to determine the geometry of the SFF part and the electroform thickness for minimizing the manufacturing time and cost while satisfy the tooling requirement.

The invention discloses a production method for persimmon wine to remove acerbity, which comprises the following procedures: (1) selecting fruits, cleaning and beating; (2) protecting the color; (3) enzymolysising; (4) removing acerbity and clarifying; (5) adjusting ingredient; (6) fermenting; (7) ageing; (8) filtering, filling in bottles and sterilizing; (9) stocking, wherein removing acerbity and clarifying is completed via charging 0.3-0.6g gelatin into one kilogram persimmon juice, standing for 30-40 minutes, clarifying and filtering. The invention protects the color of persimmon juice and reduces oxidation by adding ascorbic acid and citrate, applies gelatin to remove acerbity and clarify, which can effectively remove acerbity and suspended granules in persimmon juice and enable persimmon wine without acerbity and to be easily clarified,) and employs brewing dry yeast to ferment at higher temperature, which has short ferment period. The persimmon wine is clear, transparent, lucidus and free of sediment, which has typical style, good taste, pure flavour, coordinated alcohol and acerbity, full wine body, tasty, good aftertaste, no objectionable odour, fresh persimmon flavour and wine flavour.

The invention discloses a preparation method for graphene conductive slurry. The preparation method comprises the steps of dissolving a dispersing agent into a solvent firstly, and performing ultrasonic oscillation to form a uniform solution; then adding graphene and a conductive carbon material into the solution to be mixed and stirred; next, performing full dispersion through a way of ultrasonic oscillation; and finally transferring the well-dispersed slurry to a high-speed shearing emulsification homogenizing machine to be sheared and dispersed to obtain the uniform and consistent and fully-dispersed graphene conductive slurry. The preparation method is simple and easy to implement and applicable to engineering production.

The invention relates to a precise forming method for titanium-aluminum intermetallic compounds. According to the method, yttrium oxide powdery sand is selected as a surface-layer refractory to prepare a ceramic shell for investment casting, and in combination with processes such as a vacuum consumable skull furnace or a vacuum induction water-cooling copper crucible furnace and centrifugal casting, a titanium-aluminum intermetallic compound casting is prepared. The ceramic shell prepared according to the forming method is high in inertia, and good in matching between strength and deformability and collapsibility, and is suitable for investment casting of the titanium-aluminum intermetallic compounds; a prepared casting is complete in forming, the smallest wall thickness can reach 1mm, the dimension precision reaches lower than CT7, a surface pollution layer is thin, surface roughness is less than or equal to 6.3 micrometers, and more importantly, cracks cannot be formed, and therefore, the problems that titanium-aluminum alloy is low in room-temperature plasticity and easy to crack during forming are solved. The forming method is applicable to development and engineering production of various structural parts of the titanium-aluminum intermetallic compounds.

The invention relates to a large blocked TS-1 molecular sieve with high catalytic activity and a synthetic method thereof, belonging to the technical fields of catalytic chemistry and chemical engineering. The large blocked TS-1 molecular sieve is a titanium-silicalite molecular sieve which has an MFI structure and formed by mutually piling nano-level TS-1 crystal grains with the blocked size of 20-100 micrometers and the mesoporous volume of 0.55cm<3>/g. The large blocked TS-1 molecular sieve is formed by evenly mixing tetraethoxysilane as a silicon source, tetrabutyl titanate as a titanium source, tetrapropylammonium hydroxide as a template agent, water and isopropanol as a solvent and H2O2 as an inorganic additive and carrying out hydrothermal crystallization on the mixture at a temperature between 160 DEG C and 180 DEG C for 6-96 hours. The large blocked TS-1 molecular sieve maintains a single crystal grain nano-size structure, has favorable catalytic reaction activity and can realize the separation on the entire device by filtering operation; and the adopted inorganic addictive H2O2 is friendly to the environment and has low price, thus the invention has important significance in the practical chemical engineering production.

The invention discloses a technique method for producing sodium bisulfide and belongs to the technical field of the chemical engineering production technology. The technique method for producing sodium bisulfide is low in production cost and can control product quality easily during production. The technique method includes: feeding buffered hydrogen sulfide and process absorption liquid with sodium sulphide as the main ingredient into an absorption tower respectively from the lower portion and the upper portion of the absorption tower, absorbing the hydrogen sulfide and the process absorption liquid on the surface of packing in the absorption tower to generate solution with the sodium bisulfide as the main ingredient, enabling the solution to flow to the bottom of the absorption tower, and discharging the unabsorbed hydrogen sulfide tail gas from the top of the absorption tower; pumping the solution at the bottom of the absorption tower out, returning most of the solution back to the absorption tower for recycling, feeding the small amount of solution to a sodium bisulfide production solution storing tank, and simultaneously adding the process absorption liquid in the absorption tower from the upper portion of the absorption tower during the absorption circulating process; and finally performing evaporation, concentration and dehydration on the solution, cooling the solution for molding, packaging and finishing the production of the sodium bisulfide.

The invention discloses a method for managing multisource-isomerism aviation remote sensing data, which comprises the following steps: (1) using geographic regions and production engineering as units so as to realize aviation remote sensing data storage and management; and realizing high-efficient data storage and management served for aviation remote sensing data products by technologies such as tiles and the like; and (2) using a method for dynamically generating a continuous detail level model, establishing a corresponding high-efficient mechanism, and realizing three-dimensional visual issuing and sharing of the aviation remote sensing data products automatically and high-efficiently. According to the invention, the method effectively solves integrated storage and management problems of multisource, multi-time-phase, isomerism aviation remote sensing data in a digital aviation photography measurement producing system.

The invention discloses a production device, particularly a production device for sodium bisulfide continuous absorption reaction, and belongs to the technical field of chemical engineering production equipment. The invention provides the production device for the sodium bisulfide continuous absorption reaction, which is low in power consumption and production cost and easy in control of product quality. The production device comprises an absorption tower, an absorption column bottoms pump and a sodium bisulfide production solution storage tank, a process tail gas output interface is arranged at the top of the absorption tower, a process absorption liquid input interface is arranged at the upper part of the absorption tower, a hydrogen sulfide gas input interface is arranged at the lower part of the absorption tower, an input end of the absorption column bottoms pump is connected with the bottom of the absorption tower, and an output end of the absorption column bottoms pup is connected with the process absorption liquid input interface and the sodium hydrosulfide production solution storage tank respectively.

The invention relates to a preparation method of a nitrogen/ sulphur co-doping three-dimensional graphene sponge. The preparation method of the nitrogen/ sulphur co-doping three-dimensional graphene sponge comprises the steps of firstly, fully dispersing a graphene oxide and thiourea mixture through an ultrasonic oscillating way, then filling the mixture into a hydrothermal reaction kettle, reducing the graphene oxide into graphene through high temperature and high pressure, meanwhile, self-assembling the graphene into a three-dimensional graphene macroscopic body, and doping a nitrogen element and a sulphur element into a graphene substrate; and finally, repetitively cleaning the three-dimensional graphene macroscopic body, and freeze drying to obtain the nitrogen/ sulphur co-doping three-dimensional graphene sponge. The three-dimensional graphene sponge synthesized through hydrothermal reaction has the advantages of light weight and porosity, and is applied in a lithium-sulfur battery so as to be capable of improving the electrical conductivity of an anode material and solving the problem of big volume change during an electrode reaction process. The preparation method of the nitrogen/ sulphur co-doping three-dimensional graphene sponge provided by the invention is simple and easy to implement, and is very applicable to engineering production.

The invention discloses a vanadium/copper solid solution transition connection-based welding process for a titanium-containing metal layer/pipeline steel layer composite board. The titanium-containing metal layer/pipeline steel layer composite board is formed in the way that an industrial pure titanium and titanium alloy board and a pipeline steel board are connected together by the explosive welding process and the connected boards are rolled by use of the controlled rolling and controlled cooling technology, so that an industrial pure titanium and titanium alloy layer is arranged on one side of the titanium-containing metal layer/pipeline steel layer composite board, and a pipeline steel layer is arranged on the other side. The welding process provided by the invention is simple in process implementation, can realize metallurgical butt-welding engineering production of the titanium-containing metal layer/pipeline steel layer composite board, enables a metallurgically connected seam to be relatively good in appearance and favorable in mechanical property index, and achieves reliable connection of the titanium-containing metal layer/pipeline steel layer composite board while guaranteeing the decay resistance of the titanium-containing metal layer/pipeline steel layer composite board.

The invention discloses a hydrophilic-underwater oleophobic polymer porous membrane, a preparation method and applications thereof. The hydrophilic-underwater oleophobic polymer porous membrane is a polymer matrix membrane. The membrane surface has a coarse micro-nano level porous structure. Nano level, micrometer level and/or sub-micrometer level tunnels are distributed in the membrane. The static contact angle between the membrane and water is less than 10 degrees, and the underwater static contact angle between the membrane and oil is greater than 130 degrees. The provided membrane can be used to separate and purify oil-water mixture and emulsified oil-water generated by chemical engineering production, daily life, crude oil leakage accidents, and the like, and has a very important application value and wide application range.

The invention discloses a pure titanium or titanium alloy/carbon steel laminar composite plate welding method. A pure titanium or titanium alloy/carbon steel laminar composite plate is formed by metallurgically connecting an industrial pure titanium or titanium alloy plate with a carbon steel plate through explosion and hot rolling processes; a welding groove is finely designed and machined for the composite plate; MAG and TIG fusion welding technologies are combined; the plate-plate butt welding connection is performed for the pure titanium or titanium alloy/carbon steel laminar composite plate by a spraying transition technology; and a spraying layer is excellent in formation, compact and high in bonding force with a lower-layer material, achieves an excellent metallurgy transition connecting effect, and prevents generation of brittle and hard phases in welding lines. The welding method realizes engineering production of metallurgy butt welding connection of the pure titanium or titanium alloy/carbon steel laminar composite plate, is better in appearance and excellent in mechanical performance of metallurgy connection welding lines, guarantees corrosion resistance of the welding lines, and realizes reliable metallurgy connection of the welding lines.

A high-temperature high-pressure tubular-flow erosion corrosion experiment device mainly includes: a high-temperature high-pressure kettle, a first pressure meter, a temperature meter, a sample test tube, an actual object test tube, a sample trough, a magnetic pump, a liquid transporting pipe, and an ultrasonic flow rate meter. The high-temperature high-pressure kettle is used for providing a fluid at certain temperature and under certain pressure. The actual object test tube is connected to a third joint and a fourth joint of the liquid transporting pipe through a second flange. An actual object tube is fixed in the actual object test tube through a first corrosion-resistant sealing ring. The sample test tube is connected to a first joint and a second joint of the liquid transporting pipe through a first flange. The sample trough, in which a sample is hung, is formed in the sample test tube. The magnetic pump is used for providing power to the experiment device for driving fluid circulation. The ultrasonic flow rate meter is used for testing the speed of the circulated fluid. The whole experiment device is made of corrosion-resistant alloy and a heat insulation layer covers external walls of all parts, so that temperature loss is avoided. The device is suitable for drilling production engineering of petroleum and natural gas.

The invention discloses a method for improving biosynthesis of levodopa. The method comprises the following steps of: (1) using SEQ ID No.1 and SEQ ID No.2 as the primers, using an E.coli BL21 strain as the template, amplifying and recycling so as to obtain a hpaBC gene segment, conducting double digestion on a pCDFDuet-1 plasmid and the hpaBC gene segment, connecting and preparing a recombinant plasmid pBET1; (2) introducing the recombinant plasmid pBET1 into host escherichia coli so as to obtain transformed host cells; and (3) selecting the transformed host cells so as to obtain a levodopa production engineering bacteria single colony, taking 1ml of the levodopa production engineering bacteria single colony and putting into 100ml of a first culture medium, cultivating and measuring OD600, adding an isopropyl-beta-D-sulfo-pyran galactoside water solution and ascorbic acid, continuing cultivating and measuring the content of the levodopa. By utilizing the method disclosed by the invention, the output of the levodopa is increased, the production cost is lowered, and the operation process is simplified.

The invention relates to etching liquid for a TFT (thin film transistor)array substrate copper conductor. The etching liquid comprises primary oxidant, secondary oxidant, a chelating agent, inhibitor and additive, wherein the primary oxidant is hydrogen peroxide; the secondary oxidant is phosphoric acid, sulfuric acid and nitric acid; the chelating agent is amino compounds; the inhibitor is aminoimidazole compounds and carboxylic acid compounds; and the additive is amine compounds containing ammonia nitrogen and carboxy oxygen coordination atoms. According to the etching liquid, the characteristic of shorter process windows of the etching liquid for the copper conductors is obviously improved, the engineering control difficulty is reduced, and the stability of engineering production and the output yield are improved by means of the components and the types of the novel chelating agent and the additive; the shelf-time stability is improved, and the stability of the etching performance can be kept in the later shelf-time storage period; and the service life (more than or equal to 5,000 ppm) is prolonged, the process windows are not obviously narrowed in the later processing period, and the properties and the like are relatively stable.

The invention provides a micro-spherical SiO2-Al2O3 based noble metal catalyst and a preparation method thereof. The preparation method comprises the following steps: dispersing silica sol into a silica sol system, so that silica sol is mixed with alumina sol and a coagulant to form formed sol, forming the sol by virtue of an atomizing dispersion-oil column formation method, and carrying out aging, washing, drying and roasting to obtain micro-spherical SiO2-Al2O3; and loading noble metal active components with the micro-spherical SiO2-Al2O3 as a carrier, obtain the micro-spherical SiO2-Al2O3 based noble metal catalyst. The catalyst has the characteristics that the specific surface area and the pore volume are large, the dispersity of active components is high, the abrasion index is relatively low, and the wear resistance is high. The catalyst is mainly applied to a hydrogenation process of preparing hydrogen peroxide by using a fluidized bed anthraquinone method and has relatively high catalytic activity, selectivity and stability. The catalyst can be also applied to reaction processes such as hydrorefining, selective hydrogenation and selective oxidation in petrochemical engineering and fine chemical engineering production.

A microwave geodimeter relates to a distance measuring device, in particular to a high-accuracy noncontact distance measuring device with microwave method, mainly suitable for measuring material lever or liquid lever in containers or storehouses in industrial production engineering. The invention provides a microwave geodimeter which can realize a high-resolution distance measuring by using the prior electric elements. The invention comprises a transmitting device, a receiving device and a signal processing device. The transmitting device is provided with a first clock signal generator, a second clock signal generator, a pulse generator, a local oscillator, a switch, a power amplifier, a ring coupled circuit and an antenna. The receiving device is provided with an antenna, a ring coupled circuit and a low-noise amplifier; the input of the low-noise amplifier is connected with the output of the ring coupled circuit of the receiving device. The signal processing device is provided with a receiving/transmitting switch unit, a filter, a second clock signal generator, a pulse generator, a sampling smoothing circuit, a peak value testing circuit, a microprocessor and a display device.

The invention relates to the technical field of chemical engineering production, in particular to a refining method of xylose in hemicellulose hydrolysate. The method comprises the following steps of(1) removing impurities from the hemicellulose hydrolysate; feeding the hemicellulose hydrolysate into an ultrafiltration membrane to obtain transmission liquid; (2) separating the transmission liquidby the nanofiltration membrane; remaining sulfuric acid into concentrated liquid, wherein the transmission liquid contains acetic acid and xylose; (3) performing electrodialysis separation on aceticacid and xylose water solution; (4) directly using the xylose water solution for furfural production; (5) performing extraction and rectification on the acetic acid by solvents to obtain acetic acid with the concentration being 98.5 percent. The method has the advantages that the operation is simple; the obtained xylose water solution can be directly used for the furfural production; the acetic acid with the mass concentration being about 20 percent can be obtained; a solvent extraction rectification device is used for extraction separation to obtain the acetic acid with the mass concentrationbeing 98.5 percent. In the process, the separated sulfuric acid returns to the hydrolysis work procedure to be continuously used; active ingredients are recovered and reused; the production cost is reduced.

The invention provides a gelled material for soil solidification, belonging to the technical field of gelled materials. The gelled material comprises the following raw materials in percentage by mass: 20-40% of aluminum dreg micropowder, 30-50% of slag micropowder, 5-20% of fly ash, 10-15% of desulfurized gypsum and 1-5% of additive. The aluminum dreg micropowder adopted by the gelled material disclosed by the invention is aluminum-containing solid waste generated during production engineering of electrolytic aluminum, so that the waste is reused, the cost is saved, and the environment can be protected.