30results about How to "Easy and economical to operate" patented technology

The energy-free refrigeration door of the present application provides a way to control condensation when the door of a refrigeration unit is opened by providing thermal insulation to the door with glass panels which have a low emissivity coating. The door includes a door frame housing and an insulating glass unit comprising inner, middle and outer sheets of glass. A first sealant assembly disposed around the periphery of the inner and middle sheets of glass forms a first chamber between the inner and middle sheets of glass. A second sealant assembly disposed around the periphery of the middle and outer sheets of glass forms a second chamber between the middle and outer sheets of glass. A gas, such as krypton, air, or argon is held in the first and second chambers. The outer sheet of glass and inner sheet of glass each have an unexposed surface that faces the middle sheet of glass. A low emissivity coating is disposed on the unexposed surfaces of the inner and outer sheets of glass so that the glass door as a whole avoids formation of condensation on the outer surface of the outer sheet of the glass door, without the application of electricity to heat the door, while also providing the desired evaporation rate of condensation from the inner side of the inner sheet of the glass door. An anti-fog or anti-frost coating is included on a surface of one of the sheets of glass.

A dust arrester includes a housing with air inlet and air outlet, wherein the ambient air containing dust particles can be introduced into the housing via the air inlet and discharged from the housing via the air outlet. The dust arrester further includes a water trough placed in the bottom of the housing and a chaos effect generator including a nozzle and a material. The nozzle can spray water supplied from the water trough. The water sprayed interacts with the material to generate a chaos condition, so that the dust particles can be removed from the introduced air under the chaos condition.

The invention discloses preparation and application of a photocatalyst Ag/ AgBr, and belongs to the technical field of nanocatalysts. According to the method, 1-butyl-3-methylimidazole bromine ([BMIM]Br) is prepared from N-methylimidazole and n-butyl bromide under certain conditions, wherein a preparation method comprises the steps that a certain amount of N-methylimidazole and a certain amount of n-butyl bromide are weighed and put into a round-bottom flask to be stirred and refluxed for a period of time in a high-temperature water bath to obtain faint yellow thick liquid, and 1-butyl-3-methylimidazole bromine ([BMIM]Br) which is collected after cooling has the very high catalytic activity in preparation of the photocatalyst Ag-AgBr by serving as a precursor.

The invention discloses a pyridine fused norcorrole compound and a preparation method thereof. The pyridine fused norcorrole compound has a structural formula as shown in formula (1). The preparation method mainly comprises the following steps: weighing a certain amount of amido norcorrole and aromatic aldehyde, putting into a reactor, adding newly steamed toluene solution to the reactor, stirring at 110 DEG C for 5-8 h, and tracking the reaction by a chromatographic method; cooling to room temperature after the reaction is completed, separating directly with a chromatography column, eluting with methylene chloride and normal hexane as eluents, collecting second brown color product as a crude product, and concentrating and drying the crude product to obtain the compound. The pyridine fused norcorrole compound and the preparation method thereof have the following advantages: the reaction conditions are stable, the yield is high, the operation is simple and safe, and batch production can be realized.

Process and apparatus for cooling free-flowing granulate is provided in which the granulate trickles from top to bottom by gravity in a fixed container with movable cooling surfaces attached internally.

A preparation method of a zirconium dioxide all-ceramic post/pin for dental restoration is characterized by comprising the following steps: firstly, acquiring the size parameters of a post/pin required by a restoration part; secondly, manufacturing a corresponding post/pin wax rod plaster model according to the acquired size parameters; thirdly, inputting data of the plaster model into a CAD/CAM database; fourthly, utilizing the CAD/CAM technology to control machining equipment to cut and process a zirconium dioxide ceramic block of the required shape, wherein the corresponding sizes have to be amplified correspondingly under the consideration of the shrinkage ratio of the zirconium dioxide ceramic block in the sintering process during cutting; fifthly, placing the cut zirconium dioxide post/pin into a zirconium dioxide sintering furnace for sintering forming; sixthly, performing sand-blasting and cleaning treatment on the surface of the zirconium dioxide post/pin subjected to sintering forming; and seventhly, before use, performing surface pretreatment on the zirconium dioxide post/pin subjected to sand-blasting and cleaning treatment for later use. The preparation method provides a high-strength corrosion-resistant durable material for dental restoration, which is convenient to manufacture and use and is an ideal novel material for the dental department.

The invention discloses a 4-arylmethylidene-2-hydroxy-3-pinone derivative as well as a preparation method and an application thereof. The derivative comprises the following components of: 4-benzylidene-2-hydroxy-3-pinone, 4-(4'-methylbenzylidene)-2-hydroxy-3-pinone, 4-(4'-methoxybenzylidene)-2-hydroxy-3-pinone, 4-(4'-hydoxybenzylidene)-2-hydroxy-3-pinone, 4-(4'-chlorobenzylidene)-2-hydroxy-3-pinone, 4-(4'-nitrobenzylidene)-2-hydroxy-3-pinone and 4-(furan-2'-methylene)-2-hydroxy-3-pinone. The preparation method comprises the steps of: carrying out selective oxidation on alpha-pinene as a raw material through using potassium permanganate to obtain 2-hydroxy-3-pinone; carrying out aldol reaction on 2-hydroxy-3-pinone and aromatic aldehyde to prepare the derivative. The derivative has the characteristics of good ultraviolet absorption effect, wide ultraviolet spectrum absorption range, good photostability, broad application prospect in ultraviolet ray absorption, and short in synthetic route, simple and convenient and economic to operate, good in reaction selectivity, high in yield and little in pollution.

The invention discloses a composition for treating myocardial ischemia and a preparation method thereof. The preparation method comprises the following steps of: extracting and refining vine root and suberect spatholobus stem to obtain extracts with higher effective component contents; adding the extracts into a pharmaceutical adjuvant respectively according to the proportions of 1:(1-5) and 1:(1-8); and uniformly mixing to respectively obtain a soft capsule and a pill. After the extract obtained by adopting the modern traditional Chinese medicine separating and extracting technology is made into the vein smoothing soft capsule and the pill, the effective components of the medicament are fully retained, and the bioavailability of the medicament is improved; meanwhile, the preparation process of the extract is simple and economic, is convenient for operation and can more favorably meet the requirement for industrialized production.

The invention discloses equipment and a method for batch preparation of microcapsules. The equipment comprises a liquid supply container, wherein the liquid supply container is connected with a waterpump through a connecting pipe and is communicated to a rotary distributor; the upper part of the rotary distributor is connected with a fixed ring; the lower part of the rotary distributor corresponds to a receiving reaction vessel below the fixed ring; a plastic net is arranged inside the receiving reaction vessel; a Z-shaped plastic pipe communicated with the connecting pipe is arranged in an inner cavity of the rotary distributor; a motor is arranged on the side of the Z-shaped plastic pipe and is connected with a T-shaped shaft which extends inside a dosing short pipe together with the Z-shaped plastic pipe; two rotary distributing cross bars are connected onto the dosing short pipe; a plurality of tiny distributing holes are formed in the lower parts of the rotary distributing crossbars. The equipment disclosed by the invention has the advantages of simple flow, lower economic cost and capability of realizing batch production; the equipment can embed different thalli and enzymesand improve biological concentration; the prepared microcapsules can provide a good operation platform for production technologies and flows in the actual application field of microcapsule immobilization scientific experiments and chemical material production.