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31results about How to "Not prone to oxidation reactions" patented technology

Celery seed extract composition and preparation method thereof

The invention relates to a celery seed extract composition and a preparation method thereof. The composition contains 30-90 parts by weight of celery seed extract, 10-70 parts by weight of thinner, 0.01-1 part by weight of antioxidant, and optional suspending agent, surfactant and preservative. The invention further relates to a soft capsule preparation containing the composition or an oral liquid preparation containing the composition, and the preparation method of the composition or a preparation method of the preparation. The composition is reasonable in types of accessories and a main drug, reasonable in matching dose and convenient to administrate, and has the advantages of stability, safety, rapid response, high bioavailability, small side effects, small administration dose and the like. The preparation method has the characteristics of simple process and stable product quality, and is easy to control.
Owner:BEIJING HUMANWELL JUNWEI PHARM TECH CO LTD

Working medium filling method for high-temperature heat pipe

InactiveCN109141086AAvoid welding of dissimilar materialsNot easy to oxidizeIndirect heat exchangersEngineeringGlovebox
A working medium filling method for a high-temperature heat pipe comprises the following steps that (1) an internal threaded connector is machined in the surface of a high-temperature heat pipe shell,and a plug with the corresponding size is machined; (2) the high-temperature heat pipe shell is placed into a glovebox with an upper ventilating hole and a lower ventilating hole, a sufficient amountof argon is led into the glovebox through the lower ventilating hole, and the excessive argon is exhausted through the upper ventilating hole; and (3) a working medium is cut and weighed in the glovebox, and then the cut working medium is placed into the high-temperature heat pipe shell through the internal threaded connector; (4) a plug is screwed into the internal threaded connector and tightened, and then the high-temperature heat pipe shell with the plug is placed into a vacuum chamber to be vacuumized; and (5) a gap between the plug and the internal threaded connector is welded in a vacuum mode through an electron beam or a laser beam, and thus the high-temperature heat pipe with the good sealing property is obtained.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS

Preparation method of casting coating

The invention discloses a preparation method of casting coating, and belongs to the technical field of coating preparation. Firstly, rice hulls serve as raw materials, the rice hulls are smashed, ricehull smashed materials are obtained, the rice hull smashed materials react at high temperature, silicon carbide does not easily suffer from an oxidization reaction, and the burning-on defect generated due to metal penetration of the casting coating prepared with the method can be effectively avoided; glass fibers serve as raw materials, the surfaces of the glass fibers also contain silanol groups, the surface tension of the silicon carbide is reduced, the surface energy of the silicon carbide is reduced, and the suspension dispersity is improved; kaolin and quartz stones serve as raw materials, the high temperature resistance of the kaolin and the quartz stones is extremely good, and the abrasion resistance of the kaolin and the quartz stones is good; sardine bones serve as raw materials,the sardine bones contain a large amount of fluorine, fluorine is bound on the surface of modified inorganic matter through a fermentation effect, and the suspension dispersity of the casting coatingprepared with the method is further improved; and polyvinyl alcohol is strong organic adhesive, the strength of the casting coating can be improved, and broad application prospects are achieved.
Owner:谭建平

Agricultural planting support frame based on temperature self-adaptive adjustment

The invention discloses an agricultural planting support frame based on temperature self-adaptive adjustment, and belongs to the field of agriculture. According to the agricultural planting support frame based on temperature self-adaptive adjustment, in the scheme, a shape memory spring deforms through temperature change, so that a plurality of T-shaped blocks are moved, and the distance between every two of multiple longitudinal sliding rods is adaptively adjusted; the sliding efficiency of the T-shaped blocks in T-shaped grooves is improved through balls; a glass plate is frozen to be cracked at a low temperature; dew is generated on the surface of a transverse fixing rod, and the dew reacts with a heating insulation blocks in a storage groove and releases heat, so that the transverse fixing rod and the longitudinal sliding rods are kept in a constant-temperature state, and plant damage due to low temperature is reduced; and a limiting strip at the outer end of an adjusting rod slides in a limiting groove and limits the adjusting rod, and when waterlogging occurs in a planting area, water swelling rubber is swelled when encountering water, so that the height of the transverse fixing rod is increased, and damage of waterlogging to plants at the upper end of the transverse fixing rod is reduced.
Owner:六安市明公农业科技股份有限公司

Printing plate protective coating and preparation method thereof

The invention discloses a printing plate protective coating and a preparation method thereof, belongs to the technical field of printing, and solves the problem that a printing plate in the prior art does not have good comprehensive performance. The protective coating is prepared from the following raw materials in parts by weight: 100-115 parts of modified acrylic resin, 7.5-8.2 parts of modified nano silicon dioxide, 1.2-1.5 parts of a dispersing agent, 0.8-1.1 parts of a defoaming agent, 1.3-1.7 parts of a flatting agent and 0.4-0.7 part of an adhesion promoter. The raw materials are stirred, subjected to vacuum bubble removal and ultrasonic dispersion to prepare a composite coating, then the composite coating is coated on the surface of a printing plate, and the the composite coating is dryed to obtain a protective coating. According to the prepared modified acrylic resin, a main chain is separated from the outside by fluorine atoms of a side chain, direct action with the outside is avoided, the corrosion resistance and solvent resistance of the resin are improved, the nano silicon dioxide is modified by the silane coupling agent, the compatibility is improved, the nano silicon dioxide is uniformly distributed in a coating, and the hardness and wear resistance of the coating are improved.
Owner:安徽强邦新材料股份有限公司

Reduced iron circulation type repairing agent based on sewage treatment, and preparation method of repairing agent

InactiveCN110240247AEasy to use quantitativelyRealize the function of water restorationWater/sewage treatment by reductionIron saltsSewage
The invention discloses a reduced iron circulation type repairing agent based on sewage treatment, and a preparation method of the repairing agent, belonging to the field of sewage treatment. The reduced iron circulation type repairing agent based on sewage treatment is prepared from a green repairing agent; the green repairing agent is prepared from green extract and an iron salt solution; the green extract is water hyacinth extract, and the water hyacinth extract comprises extract of stems, leaves and roots of water hyacinths; the roots of the water hyacinths have a stronger sewage purification function; nano-zero-valent iron with better quality can be prepared by using the water hyacinth extract and the iron salt solution, so that the better reduced iron circulation type repairing agent can be formed; after the scheme is adopted, sewage can be repaired by using the green repairing agent; a certain amount of the prepared green repairing agent can be put into a natural containing shell, so that quantitative loading and quantitative releasing are realized; the reduced iron circulation type repairing agent is convenient and efficient in releasing, and is beneficial to natural preservation of the green repairing agent.
Owner:福建钛鹭科技有限公司

Method for preparing strong magnetic iron enzyme compound under mild conditions

InactiveCN108642034AHigh unit magnetic load ratioImprove stabilityOn/in inorganic carrierIron saltsAdhesive
The invention discloses a method for preparing a strong magnetic iron enzyme compound under mild conditions. The method comprises the following steps of (1) dissolving enzyme protein into a Tris-HCl buffer solution; (2) adding inorganic iron salts or inorganic ferrous salts or organic iron salts or organic ferrous salt iron precursors; (3) adding dopamine or dopamine bionic adhesives into the solution; and (4) stirring the mixed solution at normal temperature; dripping a plurality of drips of ammonia water; performing separation under the effect of a neodymium iron boron strong magnet; and colleting the strong magnetic iron enzyme compound. The method provided by the invention has the advantages that the strong magnetic iron enzyme compound simultaneously has bioactivity and strong magnetism; the compound can realize the bioactivity in the free state, and can realize the effective separation and recovery in the magnetic field; a magnetic core is generated in situ; the unit magnetic loading rate is high; no aggregation phenomenon occurs; the magnetic core stability is high; and demagnetization due to oxidization reaction cannot easily occur. The preparation method is simple; the preparation is performed under the conditions of water phase, room temperature and normal pressure; no organic solvent participates in the reaction; and the preparation conditions are green and mild.
Owner:TIANJIN UNIV OF SCI & TECH

A method for preventing nodulation of carbon sleeve rolls of continuous annealing furnace

The invention provides a method for preventing nodulation of carbon sleeve rolls in a continuous annealing furnace. The method includes: after cold rolling, the non-oriented silicon steel is washed with alkali, rinsed and dried to remove residual oil and iron on the surface of hard rolled coils, and then enter the pH value In 4‑6 sodium chromate solution, surface passivation treatment, rinse and dry. The sodium chromate concentration in the sodium chromate solution with a pH value of 4-6 is 20-50g / L, the pH value is 4-6, and the solution temperature is 35-50°C. A dense passivation film is formed on the surface of the passivated cold-rolled non-oriented silicon steel, which can effectively prevent the oxidation of the surface of the non-oriented silicon steel during the annealing process, thereby preventing the formation of nodules on the carbon rollers in the furnace. The method of the invention can effectively prolong the service life of the carbon sleeve rolls, reduce the occurrence of surface scratches and dent defects caused by nodules on the carbon sleeve rolls, and improve the surface quality of non-oriented silicon steel products. In addition, since the non-oriented silicon steel is not easily oxidized in the annealing furnace, the use of H 2 , greatly reducing the cost of the annealing production process, while improving the safety of the production process.
Owner:INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
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