45results about How to "Avoid chemical changes" patented technology

A method for processing a surface of a component, in particular in the aviation sector, including the following steps: spraying the component with a first powder and coating the component with a second powder, the first powder having the same chemical composition as the second powder.

New iron preparations comprising stable, unpolymerized iron(III) citrate complex compositions and methods for their preparation are provided. Further, the invention involves the use stable, unpolymerized iron(III) citrate complex compositions of the invention as a food additive, nutritional supplement, dietary supplement, medical food, nutrient, iron fortificant, and source of iron in the fields of nutrition for humans, animals, fish, and birds and of diagnostics. The invention further involves the use of stable, unpolymerized iron(III) citrate complex compositions of the invention as a pharmaceutical and pharmacologically active ingredient for human clinical and veterinary applications.

The invention relates to a Soxhlet extractor, particularly relating to a temperature controlled Soxhlet extractor. The temperature controlled Soxhlet extractor comprises an external pipe and an internal pipe which are arranged in a sheathing manner; one end of the external pipe is provided with a temperature control liquid inlet; the other end of the external pipe is provided with a temperature control liquid inlet; a ground connecting end is arranged at the lower part of the external pipe; a branch pipe is arranged between the upper part of the internal pipe and the ground connecting end; a syphon pipe is arranged at the bottom of the internal pipe; a coiled pipe is arranged between the external pipe and the internal pipe; and the pipe body of the coiled pipe is positioned in the interlayer between the external pipe and the internal pipe. In the invention, the internal pipe is sheathed in the external pipe; the temperature control liquid circulates in the interlayer between the external pipe and the internal pipe to lead the internal pipe to keep a certain temperature; the coiled pipe is arranged between the external pipe and the internal pipe; the pipe body of the coiled pipe is arranged in the interlayer between the external pipe and the internal pipe; the condensed and refluxed solvent flows into the internal pipe after passing through the coiled pipe, thus the condensed solvent is controlled at a certain temperature through the temperature control liquid, so as to lead the extracting process to be performed at the required temperature.

The invention provides a glass fiber reinforced nylon halogen-free flame-retardant masterbatch and a preparation method and application thereof. The glass fiber reinforced nylon halogen-free flame-retardant masterbatch comprises 20.0%-48.0% of resin carrier, 50%-75% of fire retardant of melamine polyphosphate and derivative thereof, 0.1%-2% of acid acceptor, 0.1%-5% of lubricant, 0.2%-0.6% of antioxygen and 0.0%-1% of rheological additive. The glass fiber reinforced nylon halogen-free flame-retardant masterbatch has the advantages that stability of the fire retardant of melamine polyphosphateand derivative thereof in halogen-free flame-retardant glass fiber reinforced nylon shearing and extruding processes is improved, contacts of the fire retardant of melamine polyphosphate and derivative thereof and organic aluminum hypophosphite fire retardant in the processes are reduced, and degradation and color changes of the nylon are reduced.

The invention relates to a method for machining the running surfaces (9) of winter sports appliances such as skis or snowboards, in which a blank track (20) is subjected to a machining process in order to obtain a predetermined surface microstructure which improves the gliding ability. A precisely defined and reproducible surface structure of the track is achieved in such a way that the machining process for producing the surface microstructure comprises a plastic deformation by a tool (5, 5a) which is moved over a running surface (9) of the track blank (20) and is pressed with a predetermined force on the track blank (20) in order to deform the same in a plastic manner. The invention further relates to a winter sports appliance which is produced with such a method and an apparatus for performing the method.

The invention discloses an on-line real-time analysis method for tobacco smoke. The method adopts an on-line real-time analyzer for tobacco smoke, and the analyzer comprises a smoking machine, a feeding and cleaning module, a smoke analysis module, a smoke holding device, a deactivated pipeline system and an external controller. A gas chromatograph or gas-mass spectrometer is used for realizing detection of sample components; the temperature-controllable smoke holding device is used for realizing selective gas filtration or total smoke analysis without filter disc through various special adsorption materials and temperature setting; the external controller is used for realizing synchronous control of the smoking machine, an on-line pollution cleaning sampler and the gas chromatograph; thus, the real-time collection and analysis of tobacco smoke is completed. The method has the characteristics of controllable suction, controllable smoke volume, controllable temperature, real-time cleaning of smoke pollution and no residues, realizes real-time on-line analysis, directly analyzes the gas components generated by tobacco burning, and avoids chemical change or loss of components in the sample processing process.

A method for extracting and preparing the active ingredient of rhubarb saltpeter decoction. After concentrating the water decoction obtained by decocting rhubarb, refining it on a macroporous resin column to obtain the rhubarb extract component, extracting the phellodendron with ethanol to obtain the phellodendron extract component, and After the water decoction obtained by decocting gardenia is concentrated, it is refined with macroporous resin to obtain gardenia extract components, and finally rhubarb extract components, cork extract components, gardenia extract components and mirabilite are mixed to make rhubarb saltpeter decoction medicine active ingredient. The invention effectively solves the problems of decocting the whole prescription of the rhubarb saltpeter decoction to reduce the effective components and reduce the medicinal effect.

The invention provides a method and device for reducing cashmere balling broken ends. The method comprises the processing steps of: drying cashmere bars in a drying room after cleaning in a water tank; directly winding the dried cashmere bars on balling rollers; setting material spray nozzles above the balling rollers; evenly spraying material spray liquid containing an antistatic agent and a softening agent on the cashmere bars through the nozzles in the process of winding the cashmeres to drums; and forming the cashmeres into semi-finished products by fully winding on the drums and putting in a warehouse for later use, wherein the drying temperature of the drying room is controlled within 85-90 DEG C; and the drying time is about 4 minutes; the material spray liquid is composed of the antistatic agent (s-10), the softening agent (zk-38) and water in the batching ratio of 10: 1: 50; the preparation step is to add the antistatic agent and the softening agent in the water by the ratio for evenly mixing; the spray atomization degree and the atomization flow are kept in 1-2 litres/minute, or are subjected to the case that no liquid drops when the cashmere bars are wound on the drums.

The invention discloses a high detonation speed seismic explosive column and a making method thereof, and relates to the technical field of explosive formulas. The high detonation speed seismic explosive column is made through mixing, by mass, 25.0-40.0 parts of an aqueous methylamine nitrate solution with the concentration of 70-85%, 25.0-45.0 parts of ammonium nitrate, 13.0-15.0 parts of sodium nitrate, 4.0-6.0 parts of perlite, 10.0-15.0 parts of marble powder, 0.8-1.2 parts of sesbania powder, 0.1-0.3 parts of a foam stabilizer and 0.1-0.3 parts of a cross-linking agent; and the high detonation speed seismic explosive column also comprises 2.0-5.0 parts by mass of ethylenediamine dinitrate. A technical problem to be solved in the invention is providing the high detonation speed seismic explosive column.

Disclosed is a metal bottle interior processed to stop nickel leaching and taste altering effects. A process of stainless steel passivation performed with machines attached to specific expanding buffing cloths coated with buffing compounds or fine abrasives such as jewelers rouge. A chemical or electrical process may also be performed. The purpose of the process is to achieve a smooth high gloss mirror reflective finish for the purposes of 1) sealing in nickel and other metals in stainless steel as a prevention of any toxicological health risks, 2) preventing the chemical alteration of acidic liquids that alter and influence the taste of acidic liquids in stainless steel, and 3) leaving a smooth surface to provide for more thorough cleaning and reducing the possibility of bacteria culturing

Belonging to the technical field of product safety and detection, the invention in particular relates to a detection method for an antibacterial agent in a textile product. The method takes triclocarban, alpha-bromocinnamaldehyde, 2-(4-thiazole)-benzimidazole, and 4-chloro-3-methylphenol as the antibacterial agent target compounds to detect the residual amount of the antibacterial agent target compounds by the steps of: taking a representative sample, cutting the sample into 0.5-1.5g small pieces, adding 50-200mL of ethanol and performing Soxhlet extraction for 1.5-3h; then taking the extracted liquid to perform detection; specifically, employing a C18 column, adopting a mobile phase including acetonitrile and deionized water, and keeping the column temperature at 25-35DEG C; selecting a diode array detector as the detector; controlling the detection wavelength at 265, 300, 300, and 230nm respectively; and employing an improved Soxhlet extractor as for Soxhlet extraction, with the Soxhlet extractor including an outer tube and an inner tube that are sleeved together, and the upper end grinding port of the inner tube being connected to a condenser. The method provided by the invention has high efficiency in extraction and detection analysis of the antibacterial agent in the textile product.

The invention belongs to the technical field of high polymer materials, particularly relates to a preparation process of a persistent antibacterial and antiviral additive, and provides the following scheme aiming at the problem that an additive does not have antibacterial and antiviral functions: the preparation process comprises the following steps: S1, preparing all raw materials in parts by weight; S2, mixing a carrier and water to form a suspension; S3, mixing silver chloride and a cosolvent to obtain a silver ion solution; S4, mixing zinc sulfate, copper sulfate and water to obtain a zinc-copper ion solution; S5, mixing an organic matter with water to obtain an organic matter solution; S6, adding a silver ion solution and the zinc-copper ion solution into the suspension, and adding a dispersing agent to obtain a solution A; S7, adding the organic matter solution into the solution A, and then adding a defoaming agent to obtain a solution B; and S8, finally adding a stabilizer into the solution B. The raw materials using the additive have autonomous antibacterial and antiviral functions, subsequent manual sterilization and disinfection are not needed, the stability of the additive is improved, and the persistent antibacterial and antiviral effects are guaranteed.

The present invention discloses a coffee bean processing technology capable of improving coffee quality. The coffee bean processing technology comprises the following steps: raw coffee beans are obtained; the raw coffee beans are screened; the full raw coffee beans are screened out; all the screened raw coffee beans are rinsed; the rinsed raw coffee beans are air-dried; a continuous roasting machine is used; the raw coffee beans with a required amount are roasted; stir-fried sand and traditional Chinese medicinal granules are added into the continuous roasting machine to be mixed with the rawcoffee beans for roasting and filtering to obtain cooked coffee beans; the roasted cooked coffee beans are rapidly cooled; the cooled cooked coffee beans are ground at room temperature to obtain coffee powder; the obtained coffee powder is screened; and the screened coffee powder is uniform in particle size distribution. The coffee bean processing technology can effectively prevent chemical changes or volatilization and loss of the aroma and taste components of the coffee beans, and enables the coffee to maintain good taste and flavor, and to be good in quality.

The invention discloses a combustion apparatus which can simulate actual combustion conditions better. The combustion apparatus includes a first container, a second container and a connection pipe. The first container includes a first container body, a first opening and a second opening; the second container includes a second container body, a third opening, a forth opening and a fifth opening; the connection pipe connects the second opening to the third opening. To-be-combusted coal powder is added into the first container body through the first opening, and is subjected to pyrolysis treatment in the first container body to obtain coal coke. The coal coke is fed into the second container body through the connection pipe and is heated in the second container body. The coal coke is combusted by means of oxygen, which is fed through the forth opening, so as to obtain at least one combustion product. The fifth opening is used for discharging a gas combustion product among the at least one combustion product.

The invention provides a paint storage bucket. The paint storage bucket comprises a bucket body, a supporting frame, a vacuumizing device and a stirring device. The bottom end of the bucket body is supported by the supporting frame. The bucket body is composed of a bucket cover and a bucket body part. The left-lower end of the bucket cover is connected with the left-upper end of the bucket body part through a turning connection piece. A paint inlet pipe inserted into the bucket body is arranged at the upper end of the right side of the bucket cover. A paint outlet pipe is arranged at the right-lower end of the bucket body part. The vacuumizing device is arranged at the upper end of the left side of the bucket body part, and a controller is arranged in the middle of the left side of the bucket body part. The stirring device is arranged at the lower end of the interior of the bucket body part. A paint liquid level unit is arranged at the left end of the interior of the bucket body. The controller is connected with the vacuumizing device, the stirring device and the paint liquid level unit in a controlling mode. By the adoption of the paint storage bucket, the problems that in the prior art, paint storage equipment is simplex in function, poor in practicability and inconvenient to use are solved; and vacuum storage of paint is achieved, a stirring function is achieved, the paint can be well stored, the situation that the paint makes contact with air, and consequentially a series of chemical changes of the paint are caused is effectively avoided, and the paint storage effect is improved.