184results about How to "Expensive to fix" patented technology

The invention discloses an optical fiber array end surface tilt angle measuring instrument and an optical fiber array end surface tilt angle measuring method. The optical fiber array end surface tilt angle measuring instrument comprises a helium-neon laser device serving as a light source, a short-focal-length convergent lens, a fixed platform, a long-focal-length convergent lens, a frosted glass plate, a CCD and a computer, wherein the short-focal-length convergent lens is arranged behind the helium-neon laser device, the fixed platform is arranged behind the short-focal-length convergent lens, the long-focal-length convergent lens is arranged behind the fixed platform, the frosted glass plate is arranged behind the long-focal-length convergent lens, the CCD is arranged behind the frosted glass plate, and the computer is connected with the CCD. The optical fiber array end surface tilt angle measuring instrument provided by the invention projects an optical fiber array end surface tilt angle and amplifies a shadow of the end surface tilt angle through a lens group, directly measures the end surface tilt angle by utilizing high-precision angle measuring software, and is simple in structure, simple and convenient to operate, easy to match, low in cost and high in measurement accuracy.

The invention provides a method for preparing terephthalic benzonitrile. The method comprises the steps of taking biphenyl and trichloro-acetic chloride as raw materials and preparing theterephthalic benzonitrile through acylation, aminolysis and dehydration reaction. The method overcomes the disadvantages that the prior art is expensive in raw materials, high in intermediate toxicity, harsh in reaction conditions, low in reaction yield, poor in purity and the like, provides a terephthalic benzonitrile synthesizing process which is easy to industrialize, convenient to operate, high in yield and high in product purity, and provides a key raw material intermediate for producing the pigment red 264 with bright color and high quality.

The invention relates to an energy-saving rectifying device for integrating energy in a rectifying tower sequence and a method, wherein the device comprises a light component evaporating tower, a steam flow distributor, a steam mixer, a central condenser, a liquid flow distributor, a rectifying tower section of a light component refining tower, a stripping tower section of the light component refining tower, a reducing valve, and a flash vaporization vessel, wherein the light component evaporating tower does not have a ceiling condenser and is used for supplying high pressure steam to the rectifying tower section of the light component refining tower; the reducing valve and the flash vaporization vessel are arranged between the rectifying tower section of the light component refining tower and the stripping tower section of the light component refining tower; the internal heat exchange between the two tower sections not only can reduce the hot load consumption at the bottom of the stripping tower section of the light component refining tower, but also can reduce the condensing load consumption at the top of the rectifying tower section of the light component refining tower. Compared with the conventional multi-component rectifying and separating system, the device in the invention can greatly reduce the total energy consumption of the entire rectifying tower system, save the operation cost, and reach the purpose of saving energy and increasing efficiency.

The invention discloses a method for preparing methylacrylic acid-2, 2, 2-ethyl trifluoroacetate. The method adopts methylacrylic acid as the raw material, and the methylacrylic acid is reacted with thionyl chloride under the existence of DMF and polymerization retarder; the obtained methacrylic chloride is reacted with 2, 2, 2-ethyl trifluoroacetate under the existence of catalytic agent, then the target product of the invention-methylacrylic acid-2, 2, 2-ethyl trifluoroacetate-can be collected from the reaction product, the purity rate reaches more than 98 percent (GC), and the production rate is more than 95 percent. The reaction process condition of the invention is bland, the operation is secure and simple, the raw material sources are extensive, and the price is low; compared with the prior technology, the invention overcomes the deficiencies that the raw material price is expensive, the preservation and the transportation of the raw material are difficult, the reaction system request is harsh, the equipment corrosiveness is strong, the product quality is steady, the purity rate is good, the production rate is high, and the invention is suitable for large-scale industrialization production.

The invention discloses a dyeing method of a reactive dye with a high color fixation rate. The dyeing method comprises the following steps: S1, pretreatment: padding a texture to be dyed in a finishing solution containing chitosan quaternary ammonium salt, dipping for two times, rolling for two times, prebaking at the temperature of 80 to 100DEG C, baking at the temperature of 110 to 130DEG C, washing with cold water and then drying; S2, reactive dyeing: immersing into a dyeing solution of the reactive dye, dyeing at the temperature of 20 to 30DEG C, raising the temperature to be 50 to 70DEG C, then adding an organic solvent B, and raising the temperature to be 80 to 100DEG C; adding sodium carbonate according to the volume of the dyeing solution of the reactive dye, insulating heat and reducing to room temperature; S3, performing after treatment, water washing, soaping, water washing and drying in air. The dyeing method of the reactive dye with the high color fixation rate, provided by the invention, has the advantages of high color fixation rate and good level-dyeing property; in addition, the process is simple, and industrial implementation is easily realized; meanwhile, chemical substances with high price and greater toxicity are prevented from being used.

The invention discloses a compact multi-spectral LED (Light-Emitting Diode) all-solid-state light source system comprising an LED power supply and a control circuit module; the LED power supply and the control circuit module are connected with a plurality of LEDs with different emission wavelengths; photons of each LED are respectively coupled into branch optical fibers of multi-split optical fibers via an input-end optical fiber head or an optical coupling device; and gathered photons of the LEDs are coupled on a sample via an output-end optical fiber head or an optical coupling device by an output master optical fiber of the multi-split optical fibers. In the invention, light beams are transmitted via multi-split branch optical fibers so that multi-spectral illumination at a same outgoing port is implemented and structures such as filter wheels, transmission motors and the like which are expensive in price and complex in structure are avoided. Through the use of the LED light source, the energy consumption and the cost are reduced. As the light beams transmitted via the optical fibers can be bent and the lengths of the light beams can be designed as required, the light source disclosed by the invention can be flexibly applied to various instrument systems.

The invention discloses a measuring method for achieving optical fiber dispersion based on laser beat frequency. A 980 pumping source sends out light with the wavelength of 980 nm, the light passes through a wavelength division multiplexer, is amplified through erbium-doped optical fiber, then passes through optical fiber to be measured, passes through an optical fiber resonant cavity formed by a circulator and an FP cavity narrow-band filter, then returns and sequentially passes through the optical fiber to be measured, the erbium-doped optical fiber and the wavelength division multiplexer, at the moment, the light reflected by a sagnac ring continues to be reflected in a light path graph, a part of light transmitted by the sagnac ring passes through a photoelectric detector and a spectrum analyzer, multiple sets of data are obtained on the spectrum analyzer by adjusting the cavity length of the FP cavity narrow-band filter, and a dispersion spectrum graph is obtained through processing of origin software. The problem that an existing dispersion measurement device in the marker is large in size and heavy and consumes long time is solved.

The invention discloses a metal antirust coating with modified steel slag-based pigment and filler replacing iron oxide red and a preparation method thereof. The metal antirust coating has the advantages of easily available raw materials, low price, excellent performance, simple process, convenience in operation and environmental friendliness. The metal antirust paint is composed of the followingcomponents in percentage by mass: 15-20% of a modifier, 15-30% of a steel slag-based pigment filler, 20-35% of a resin, 20-30% of a solvent, 25-10% of an auxiliary agent, and 3-5% of a coloring pigment filler. The metal antirust coating is prepared by four steps of preparation of a modified steel slag-based pigment and filler precursor, preparation of the modified steel slag-based pigment and filler, preparation of a metal antirust coating precursor and preparation of the product metal antirust coating.

The invention discloses peony seed coffee and a preparation method thereof. The peony seed coffee is prepared by mixing and pulverizing peony powder and coffee beans, wherein the content of the coffee beans accounts for 0-98 percent, and the peony powder is formed by mixing peony seed powder and peony root hair powder. According to the invention, the peony seeds pretreated replaces part of coffee, is prepared into powder for drinking after grinding, not only the proper nutritional value of the peony seeds and the physiotherapy value of the peony root hair are achieved, but also the taste and the perfume of the coffee cannot be influenced, the consumption of the coffee beans is reduced, and the using field of the peony seeds is expanded. Moreover, since the peony seeds and the peony root hair are used after being soaked in a peony scouring liquid, light peony fragrant is enabled to be available after brewing, and the product value is improved.

The invention discloses a self-healing cement-based capillary crystalline waterproof coating and a preparation method thereof. The material is prepared from the following raw materials in percentage by mass: 35%-55% of Portland cement, 30%-45% of quartz sand, 5%-8% of quick-setting and quick-hardening cement; 4%-8% of graphene modified steel slag micro powder, 1%-2% of calcium carbonate, 1%-1.5% of anhydrous sodium sulphate and 1%-2% of core master batch, the core master batch is a mixture of bentonite, citric acid and isobutyltriethoxysilane, and the mass ratio of the bentonite to the citricacid to the isobutyltriethoxysilane is 100: (30-40): (5-10), the thickening agent accounts for 1%-%2, wherein the total content of the raw materials is 100%. The cement-based capillary crystalline waterproof coating is good in self-healing performance and low in price, and the strength and the cracking resistance are improved.