15results about How to "Reduce volatile loss" patented technology

The invention provides a tape casting solvent catcher which comprises a rack, a refrigerating system is arranged on the rack and comprises an evaporator, a steam inlet is formed in the evaporator and communicated with a waste gas header pipe in the tape casting process, and the two output ends of the evaporator are communicated with a filter and a purified liquid storage device respectively. Condensable gas in the waste gas is condensed into liquid to enter the purified liquid storage device, an air exhaust port is formed in the filter, and non-condensable gas in the waste gas enters the filter to be filtered and then is exhausted through the air exhaust port. According to the invention, the organic solvent in the waste gas of the tape casting process can be effectively recovered, the condensable organic solvent is condensed into liquid, the liquid is stored in the purified liquid storage device and finally discharged back to the tape casting equipment storage tank, so that the solvent is recycled, the loss of the solvent is reduced, the raw material cost of an enterprise is reduced, and the economic benefit of the enterprise is improved.

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 present invention relates to an alkoxypropylamine compound and its application in organic sulfur absorption and removal. The compound has the following structural formula: #imgabs0# wherein R1 is a C1-6 alkyl substituent, and R2 is H or a C1-3 alkyl substituent. Compared with the prior art, the alkoxypropylamine compound of the present invention has a good deep removal effect on various types of sulfides, and the compound has stable chemical properties, is not easy to decompose, has a small bubble point vapor pressure, has little volatilization loss, is weak in alkalinity, and has light corrosion to equipment, and thus has a good industrial application prospect.

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 invention discloses a preparation method for obtaining high-purity and high-transfer rate carnosic acid from a Chinese medicinal material rosemary. The method adopts countercurrent extraction to obtain a crude extract from the medicinal material, and then performs elution on a chromatography column to obtain high-purity carnosic acid after recrystallization. The content of carnosic acid obtained by the preparation method of the invention is as high as more than 95%, the transfer rate of the obtained product is high, and the performance is stable; and the equipment used in the preparation method is simple, which reduces the use of extraction solvents and the energy consumption required for industrial production, and is very suitable for large-scale industrial production, and has considerable economic benefits.

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.

The utility model discloses a laboratory reflux condenser, and relates to the field of chemical engineering experimental instruments. The laboratory reflux condenser comprises a glass outer tube and a glass inner tube, and the glass inner tube is inserted into the glass outer tube in a penetrating mode. The glass outer pipe is respectively communicated with a water inlet pipe and a water outlet pipe; according to the utility model, the two groups of heat-conducting fins are symmetrically distributed on the glass inner tube in a staggered manner, so that when steam flows upwards along the glass inner tube, the steam can flow in an S shape under the action of the two groups of heat-conducting fins which are distributed in a staggered manner, the flowing time of the steam in the glass inner tube is prolonged, and the condensation effect on the steam is further improved; meanwhile, when the steam is in contact with the heat-conducting fins, the steam and the cooling water can be further subjected to heat exchange under the action of the heat-conducting fins, so that the heat exchange efficiency of the steam and the cooling water is remarkably improved, and the volatilization loss is effectively reduced.

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.

The present invention relates to a mortar cutting fluid for semiconductor silicon wafers and a preparation method and application thereof. The mortar cutting fluid comprises the following components calculated by weight: 10-40 parts of polyethylene glycol; 1-10 parts of an anti-settling agent; 1-5 parts of a chelating agent; 1-5 parts of a pH buffer pair; and 30-50 parts of ultrapure water. The cutting fluid of the present invention has excellent dispersion and anti-settling properties, and the cutting fluid of the present invention has a good pH buffering effect, and can maintain the pH between 6.5-7.5 during the cutting process. At the same time, it has an excellent anti-corrosion effect, and can avoid the problem of silicon powder agglomeration and corrosion disconnection during the mortar cutting process, and can also avoid the performance difference caused by pH mutation.

The invention relates to a composite peculiar smell treating agent and a preparation method thereof, and belongs to the technical field of peculiar smell treating agents. Iron chloride hexahydrate is creatively used as a metal iron source, 2-aminoterephthalic acid containing an amino group is used as an organic ligand, then an NH2-metal organic framework is prepared through the coordination effect of the iron chloride hexahydrate and the 2-aminoterephthalic acid, then in-situ polymerization based on aniline is carried out, and the composite material is obtained. According to the invention, aniline is added into a metal organic framework, so that aniline can be bonded with amino groups of the metal organic framework in a polymerization process, doping modification of polyaniline is realized, and then a modified metal organic framework is obtained and is synergistically compounded with composite plant volatile oil consisting of ginger essential oil, clove essential oil, holly essential oil, cinnamomum camphora essential oil and mint essential oil as a deodorization active component; according to the present invention, the composite plant volatile oil is subjected to simple physical blending with the auxiliary agent and the deionized water to obtain the composite odor treatment agent, such that the deodorization effect is good, and the volatilization loss of the composite plant volatile oil is less after the storage for a period of time.