5results about How to "Process safety" patented technology

This invention belongs to the field of cosmetic technology, specifically relating to a method for preparing a lemon fruit extract containing sennaol and its application in soothing. This invention provides a method for preparing a lemon fruit extract containing sennaol, utilizing the strong penetration and dissolving power of a green solvent and the high selectivity of enzymatic reactions to achieve not only efficient extraction and conversion of sennaol but also naturally endowing the final product with excellent water solubility and chemical stability. The prepared lemon fruit extract can be directly applied to water-based formulations without complex modification or the addition of large amounts of co-solvents, maintaining potent skin-soothing activity. The entire process is gentle and safe, with no irritating organic solvents or strong acid residues, making it particularly suitable for cosmetic development targeting sensitive skin.

This invention relates to the field of N-(2,4-dinitrophenyl)-4-nitrobenzamide preparation technology, specifically to a green method for preparing nitramide compounds. The method involves adding a catalyst and dispersant to a reactor and mixing them uniformly. Then, a first and a second stream of materials are simultaneously added dropwise to the reactor for reaction. The temperature within the system is controlled during the dropwise addition. After the dropwise addition is complete, the temperature is increased to continue the reaction. After the reaction is completed, N-(2,4-dinitrophenyl)-4-nitrobenzamide is obtained through post-treatment. The first stream is a dispersion containing 4-nitro-N-phenylbenzamide, and the second stream is a nitrating agent consisting of a uniform mixture of N₂O₅ and nitric acid. This preparation method features high product conversion rate, a mild reaction process, safe and controllable production process, effectively reduces the amount of residual intermediates, and minimizes pollution.

This utility model relates to the field of PVC pipe processing and discloses a PVC pipe sawing device that facilitates safe clamping. It includes a base and a clamping motor. The clamping motor is fixedly connected to the rear of the base, and a gear is fixedly connected to the output shaft of the clamping motor. The front and rear ends of the gear are respectively meshed with gear rails, and each gear rail has a set of movable seats fixedly connected to its top. This PVC pipe sawing device, by setting up clamping plates, allows for clamping. During clamping, a cylinder is activated, pushing the clamping plates forward via a connector to adjust the clamping position. Then, the clamping motor is activated, driving the gear to rotate, causing the two sets of gear rails to move relative to each other. The two sets of fixed plates then move relative to each other, allowing the two clamps to clamp the PVC pipe from the side. This achieves the action steps of first determining the distance and then clamping, facilitating segmented, fixed-distance cutting with the saw blade. The automatic clamping process is safer and solves the safety problems associated with manual clamping.

This invention relates to a refining method for LF (Leaf-Fuel) steel scrap. The refining method includes the following steps: tapping steel from the converter; after molten steel enters the LF furnace, power is supplied, and slag is added; after adding the slag, steel scrap containing precious metals is added according to the molten steel temperature t1. When 1520℃≤t1<1530℃, the rate of adding steel scrap is 270-310 kg / min; when 1530℃≤t1<1540℃, the rate of adding steel scrap is ≤410 kg / min; when 1540℃≤t1<1550℃, the rate of adding steel scrap is ≤510 kg / min; and when t1≥1550℃, the rate of adding steel scrap is ≤610 kg / min. This refining method can effectively recover precious alloying elements from steel scrap, achieving resource reuse. Furthermore, the process is safe, ensuring personal safety and protecting the integrity of production facilities and equipment, and is highly practical.

This invention belongs to the field of archaeological excavation and mechanical construction technology, and discloses a replacement support device and construction method for an ancient shipwreck. The ancient shipwreck replacement support device includes a support frame platform, support components, a support layout monitoring system, and a support construction decision and support system. The two ends of the support components are connected to the support frame platform and the ancient shipwreck, respectively, to support and protect the shipwreck's bulkheads and side plates. The support layout monitoring system has multiple monitoring points, respectively arranged on the ancient shipwreck and the support frame platform, to monitor the deformation of the ancient shipwreck and the stress and strain of the support frame platform. The support construction decision and support system is configured to correct and determine the number and location of new support components. This invention enables the gradual and refined support and protection of the ancient shipwreck during the excavation process, replacing the shipwreck from the sea mud safely, reliably, and efficiently.