7results about How to "Realize large-scale continuous production" patented technology

The utility model discloses a medium-temperature pressure swing adsorption separation device for hydrogen-doped hydrogen in a natural gas pipeline network. The medium-temperature pressure swing adsorption separation device comprises a plurality of adsorption towers which are arranged in parallel, hydrogen storage alloy adsorbents are filled in the towers, the bottoms of the adsorption towers are connected with a hydrogen-doped natural gas inlet pipeline and a hydrogen outlet pipeline, and the tops of the adsorption towers are connected with a pressure equalizing pipeline and a concurrent discharge amp; a replacement pipeline, a final charging pipeline and a natural gas outlet pipeline; the hydrogen outlet pipeline is connected with a hydrogen buffer tank through a vacuum pump; one or more pressure-equalizing pipelines are arranged according to the requirement of pressure-equalizing times, and each pressure-equalizing pipeline is connected with one pressure-equalizing buffer tank. The temperature of the adsorption towers is controlled to be 60-120 DEG C, all the adsorption towers circularly operate for adsorption, pressure drop is equalized, and amp is smoothly discharged; the method comprises the steps of adsorption, replacement, vacuum-pumping desorption, pressure rise equalization and final charging, all adsorption towers cooperate through sequential control and enter the adsorption step in turn, efficient and rapid separation of hydrogen and natural gas is achieved, the purity of hydrogen can reach 99.999%, the yield can reach 80% or above, and the hydrogen can be directly applied to a hydrogen refueling station or a hydrogen storage device and the like.

This invention, entitled "A Low-Loss β-Carotene Microcapsule and Its Preparation Method," belongs to the field of microcapsule preparation technology. The technical problem to be solved is that during high-temperature melting, particulate all-trans β-carotene transforms into a molecular state, but this process generates a large number of cis isomers and results in significant content loss. Furthermore, the particle size and dispersibility of the particulate β-carotene prepared by grinding are still unsatisfactory, leading to low bioavailability and poor application effects. The key point of this technical solution is to prepare high all-trans molecular β-carotene microcapsules through a specific combination of treatments. This reduces content loss and cis-trans isomerization during the transformation of β-carotene from particulate to molecular state, thereby significantly improving the bioavailability of β-carotene microcapsules. Moreover, the preparation process is simple, cost-controllable, and suitable for large-scale industrial production.

The utility model relates to a poultry carcass abdominal oil pumping and removing machine which comprises a machine frame, a production line power device, a poultry body conveying device and an abdominal oil removing device, the production line power device is used for conveying poultry bodies to the poultry body conveying device on the machine frame, and the poultry body conveying device is used for driving the abdominal oil removing device to pump and remove abdominal oil in the poultry bodies; the multiple abdominal oil removing devices are evenly distributed and installed on the poultry body conveying device. Each abdominal oil removing device comprises a main guide rod, an upper sliding block, a lower sliding block, a main oil suction pipe, a vacuumizing air suction main pipe, a dome probe, a clamping guide sleeve, a connecting block and an auxiliary guide rod. The utility model has the advantages that the poultry carcass is not damaged, and the grease stripped from the abdominal skin is not doped with bad substances and tissue fragments; the abdominal oil removal efficiency is high, manpower is saved, large-scale continuous production can be achieved, manual pollution to poultry bodies is avoided, and food safety is guaranteed.

The production method comprises the following steps: cutting off a wormwood raw material, removing impurities, washing, feeding the wormwood raw material into a cone mill through a wormwood sheet pump, grinding the wormwood raw material until the pulp concentration is 2-4%, concentrating the ground pulp to 20-35% by using concentration equipment, enabling white water to flow back to a hydraulic grass washing machine for concentration adjustment, and feeding the ground pulp into a two-stage pressure screen for screening. The preparation method comprises the following steps: feeding unbleached wood pulp with the beating degree of 38-42 degrees SR into a pulp preparation tank according to a proportion, adjusting the proportion of the wood pulp, adding a dispersing agent (CMC with the dosage of 0.5-2%), a softening agent (organosilicon with the dosage of 0.5%) and a cylinder separating agent (with the dosage of 0.1%) into the pulp preparation tank, controlling by adopting DSC in the process, and controlling the proportion of the prepared pulp and chemicals on line by a flow meter to obtain the wormwood paper. According to the wormwood paper, wormwood fibers are coated with a natural-color wood pulp fiber network structure, the characteristics of natural components of wormwood are restored to the maximum extent, the wormwood paper is quantitatively controlled in the category of common paper for daily use and is 14-20 g / m < 2 >, and the wormwood paper becomes various types of paper for daily use required by the market through post-processing procedures such as embossing and compounding.

The application provides a preparation method of low-cost high-purity crystalline cristobalite quartz sand, comprising the following steps: mixing a silicon source, high-purity alkali and deionized water in a proportion, and heating to prepare high-purity water glass; mixing the high-purity water glass with high-purity acid in a proportion, stirring to form a precipitate, sealing, standing and using the growth process of the gel to perform segregation and impurity removal, and then performing aging treatment; using deionized water to filter and rinse the precipitate, and drying to obtain amorphous high-purity silica gel powder; performing crystallization transformation and chlorination impurity removal on the amorphous high-purity silica gel powder; using deionized water and dilute acid to clean the cristobalite after crystallization and impurity removal, and drying to obtain high-purity crystalline cristobalite quartz sand. The purity of the quartz sand prepared by the preparation method can reach 5N-7N grade, the preparation cost is low, large-scale continuous production can be realized, the synthesized quartz sand is in a crystalline state, and the produced quartz glass product has lower bubble and flocculent content and better mechanical, heat-resistant and optical properties.

This invention belongs to the field of lithium-ion battery material preparation technology, and discloses a one-step method for preparing lithium bis(fluorosulfonyl)imide using ionic liquid catalysis and hydrogen fluoride. This method solves the problems of low catalytic efficiency, insufficient product purity, difficult separation, and high environmental impact in existing preparation routes. Using bis(fluorosulfonyl)imide and lithium fluoride as raw materials, anhydrous hydrogen fluoride as the fluorinating agent, and an imidazole-based ionic liquid as the catalyst, under an inert atmosphere, the reaction system is prepared, followed by an integrated fluorination-lithiation reaction and post-treatment purification steps to obtain high-purity lithium bis(fluorosulfonyl)imide. This invention achieves efficient reaction under mild conditions through the synergistic effect of a specific ionic liquid and hydrogen fluoride gas, solving the problems of harsh reaction conditions, low yield, and insufficient purity in existing processes. The product yield is ≥92%, and the purity is ≥99%. The process is simple, safe, and environmentally friendly, suitable for large-scale industrial production, and can be widely used in the preparation of lithium-ion battery electrolytes.

The invention belongs to the technical field of polyurethane hot melt adhesives, and particularly relates to a strippable polyurethane hot melt adhesive based on reactive extrusion and a synthesis method thereof. The strippable polyurethane hot melt adhesive is synthesized from diisocyanate, polyester diol, polypropylene glycol, polypropylene glycol and pyrimidone derivatives through a reactive extrusion process, and a=n(-NCO) / n(-OH) is defined. When the a value is 1.1-1.3, the molar equivalent ratio of polyester diol: polypropylene glycol: polypropylene glycol: pyrimidone derivative is 1.0:1.0:0.5:(5.5a-5.5), and the strippable polyurethane hot melt adhesive is a thermoplastic polyurethane hot melt adhesive; when the a value is 1.8-2.0, the molar equivalent ratio of polyester diol: polypropylene glycol: polypropylene glycol: pyrimidone derivative is 1.0:1.0:0.5:(5.5a-5.5) / 2, and the strippable polyurethane hot melt adhesive is a reactive polyurethane hot melt adhesive. The present invention utilizes the reaction of pyrimidone derivatives with isocyanate to form a ureidopyrimidone UPy structure with self-complementary quadruple hydrogen bonds at the chain end, thereby increasing the number of hydrogen bonds, improving the bonding strength, and giving the hot melt adhesive a thermally responsive and peelable property, and can achieve large-scale continuous production.