9results about How to "Reduce volatile loss" patented technology

This invention discloses a method for preparing high-purity rare-earth ferrosilicon alloys, belonging to the field of pyrometallurgical technology. Addressing the stringent purity requirements (oxygen content ≤50ppm, sulfur content ≤100ppm) for rare-earth ferrosilicon alloys in high-end manufacturing, and the technical challenges of deep removal of impurities and poor compositional uniformity in existing preparation processes, this invention provides a method for preparing high-purity rare-earth ferrosilicon alloys integrating "deep raw material purification - multi-stage vacuum refining - directional solidification purification - application-oriented compositional control". The method includes: preparing an intermediate alloy using high-purity rare-earth oxides, high-purity silica, and steel scrap as raw materials through carbothermic reduction; placing the intermediate alloy in a vacuum induction melting furnace and performing multi-stage refining under a vacuum of ≤10Pa, selectively removing volatile impurities through segmented temperature control; performing deep deoxidation and desulfurization using composite refining agent injection technology; achieving interfacial segregation separation of impurity elements through directional solidification technology; and finally, performing atmosphere-protected annealing and compositional fine-tuning according to the target application field. Based on the multi-stage synergistic purification mechanism of "thermodynamic selective volatilization-kinetic spray reaction-crystal growth interface segregation", the rare earth ferrosilicon alloy prepared by this invention has an oxygen content of ≤45ppm, a sulfur content of ≤80ppm, and a rare earth element distribution non-uniformity of ≤±2%, which meets the application requirements of high-end fields such as aerospace high-temperature alloys, nuclear reactor control materials, and semiconductor sputtering targets.

The invention relates to a controlled-release linalool emulsion based on a ternary system as well as a preparation method and application of the controlled-release linalool emulsion. The linalool emulsion is an oil-in-water Pickering emulsion composed of a water phase and an oil phase, the water phase comprises a ternary system composed of soybean protein isolate, pectin and hydroxypropyl methyl cellulose, and the oil phase is linalool essential oil. The preparation method comprises the following steps: respectively preparing soybean protein isolate, pectin and hydroxypropyl methyl cellulose solutions, and mixing to obtain a ternary composite water phase; and mixing the ternary composite water phase with the oil phase, and carrying out high-pressure homogenization treatment and ultrasonic treatment under a low-temperature condition to obtain the controlled-release linalool emulsion based on the ternary system. Compared with the prior art, the linalool essential oil emulsion embedding method solves the problem that linalool is easy to volatilize, and can be used in the fields of fruit and vegetable fresh keeping, tea fragrance maintaining and the like.

This invention discloses a water-activated plant-derived food preservative and its preparation method. The preservative, by weight, comprises: 8-30 parts of a cruciferous plant glucosinolate concentrate, 1-8 parts of a plant-derived black mustard enzyme preparation, 3-15 parts of citrus peel essential oil, 5-20 parts of pomegranate peel polyphenol extract, 10-35 parts of low-methoxyl pectin, 15-45 parts of a cyclodextrin derivative, and 3-18 parts of a water activity regulator. The preparation method includes: separately preparing the glucosinolate concentrate and the plant-derived black mustard enzyme preparation with low black mustard enzyme activity; shearing and compounding the citrus peel essential oil, cyclodextrin derivative, and pomegranate peel polyphenol extract; and then mixing them with low-methoxyl pectin and the water activity regulator with low moisture content. This invention can inhibit premature reactions during storage and, upon contact with water, generates isothiocyanate-based antibacterial substances in situ, exhibiting advantages such as good stability, broad antibacterial spectrum, and excellent preservative effect.

The application belongs to the technical field of lubricating oil additives, and particularly relates to a piperidinol-aryl diacid ester hindered amine high-temperature antioxidant and a preparation method thereof. The application constructs a high-performance hindered amine antioxidant by esterification condensation of piperidinol containing a bulky aryl group and aryl diacid containing a rigid naphthalene ring skeleton. The molecular design effectively reduces the volatilization loss of the antioxidant at high temperature, prolongs the effective action time of the antioxidant in base oil, and simultaneously, the two functional units of hindered amine and phosphite integrated in the molecular structure can play a synergistic antioxidant effect. Compared with the prior art, the antioxidant of the application can more effectively control the acid value increase, viscosity rise and deposit generation of base oil under high-temperature and metal catalysis conditions, and meets the high-temperature antioxidant demand of a long oil change cycle.

The application relates to the tobacco essence and flavor preparation technical field, in particular to a fenugreek extract freeze-dried powder and a preparation method and application thereof. The application is prepared by reverse osmosis coupling low-temperature vacuum concentration on fenugreek seeds, and then freeze-drying to obtain the fenugreek extract freeze-dried powder. The freeze-dried powder can be directly used as a tobacco fenugreek flavor, or can be used by being dissolved in a solvent to obtain a tobacco fenugreek flavor. The reverse osmosis coupling low-temperature vacuum concentration and freeze-drying technology adopted by the method can separate and concentrate ethanol and most of the water, so that the concentration time is shortened, and the overall time of flavor preparation is further reduced; meanwhile, the process can maximally reduce the volatilization loss of heat-sensitive flavor substances, and effectively retains the aroma components in the fenugreek.

The present application relates to the technical field of waste recycling, and particularly relates to a refined tin preparation process for grading smelting and deep purification of tin-containing secondary materials. The process mixes tin-containing dust with graphite powder, light soda ash and fused quartz sand to form balls, sprays a modified dendritic polyamide-amine shell coating liquid on the outer surface of the ball core, then sprays calcium acetate solution, nano calcium hydroxide ethanol dispersion liquid and ammonium bicarbonate cold solution in sequence, and obtains refined tin products through low-temperature solid shell, medium-temperature dechlorination, high-temperature reduction smelting and vacuum distillation purification. The present application can improve the thermal stability of the pellets, reduce the circulation of chlorine-containing components and tin volatilization loss in the smelting process, and reduce the lead content in refined tin, and is suitable for resource treatment of chlorine-containing, lead-containing and tin-containing dust.

This invention discloses a thermally shock resistant, high-toughness borosilicate glass and its preparation method, relating to the field of glass manufacturing technology. The raw materials for the thermally shock resistant, high-toughness borosilicate glass include silicon dioxide, boron oxide, aluminum oxide, magnesium oxide, sodium oxide, potassium oxide, SiC@SiO2-B2O3 nanowhiskers, and rare earth pre-melted frit. The preparation method includes the steps of preparing SiC@SiO2-B2O3 nanowhiskers, preparing rare earth pre-melted frit, forming a glass substrate, and obtaining the finished glass product. The raw materials used to prepare SiC@SiO2-B2O3 nanowhiskers include β-SiC nanowhiskers, tetraethyl orthosilicate, and boric acid. The raw materials used to prepare the rare earth pre-melted frit include lanthanum oxide, ytterbium oxide, boric acid, and quartz powder. The borosilicate glass prepared by this invention exhibits strong mechanical properties and excellent thermal shock resistance.

This application relates to the field of fertilizer technology, specifically to a special fertilizer for improving the cold and drought resistance of wheat and its preparation method. The special fertilizer is composed of the following raw materials in parts by weight: 25-30 parts urea, 15-20 parts diammonium phosphate, 10-15 parts potassium sulfate, 8-10 parts humic acid, 5-7 parts attapulgite, 1-2 parts borax, 1-2 parts zinc sulfate, 20-25 parts well-rotted sheep manure, and 0.5-1 parts compound microbial agent. The process includes the following steps: melting and mixing urea and diammonium phosphate, adding potassium sulfate and attapulgite powder and stirring to obtain mixture A; mixing mixture A, humic acid, borax, zinc sulfate, well-rotted sheep manure, and compound microbial agent, granulating, cooling, and drying to obtain a special fertilizer for improving the cold and drought resistance of wheat. The special fertilizer prepared by this application can improve the cold and drought resistance of wheat.

This utility model discloses a formaldehyde deethanolination device, comprising a deethanolination tower, a preheater, a reboiler, a condenser, a reflux tank, a reflux pump, a feed pipeline, a reflux pipeline, and a first feeding pipeline. The feed pipeline is used to connect to the formaldehyde solution and is connected to the inlet of the preheater. The outlet of the preheater is connected to the inlet of the deethanolination tower. The top outlet of the deethanolination tower is connected to the inlet of the condenser. The outlet of the condenser is connected to the inlet of the reflux tank. The outlet of the reflux tank is connected to the inlet of the reflux pump. One end of the reflux pipeline and one end of the first feeding pipeline are both connected to the outlet of the reflux pump. This utility model can reduce steam consumption to save energy and improve methanol recovery rate, thereby reducing the residual methanol content in the formaldehyde solution and improving the stability during subsequent formaldehyde solution concentration.