Method for purifying liquid crystal material

The invention provides a method for purifying a liquid crystal material, which can increase the resistivity and charge retention rate of the liquid crystal material and keep the high-resistivity state stable by using a high-activity absorption material as absorbent and using an ion-exchange membrane purifier provided with an external electric field to enhancing the ion migration of impurities in the liquid crystal material, wherein the absorbent is selected from nano-silica, nano-alumina, MCM-41 (Mobil composition of matter) meso-porous molecular sieve, SBA-15 meso-porous molecular sieve, activated carbon fiber or activated silica gel or the combination thereof, preferably, the absorbent is selected from nano-silica, nano-alumina, MCM-41 meso-porous molecular sieve or the combination thereof; the consumption of the absorbent is 0.5wt% to 10wt% that of the liquid crystal material; the time for purification is 30 to 210 min; the intensity of the electric field is 0.2kV/cm to 20kV/cm; the ...

Combination is shaken towards ware equipment

The utility model relates to a combination is shaken towards ware equipment, including the body frame, the body frame lower part is provided with a plurality of shaking towards the ware, body frame upper portion side is provided with two connecting plates, connecting plate upper portion is provided with the hoist cable, the welding of body frame one side has a plurality of motors, and the motor side is provided with the water pipe, the water pipe access connection has an immersible pump, and the water pipe export is connected towards ware upper portion with shaking, be connected with the electric wire on the motor. The utility model discloses an in the device, the construction in bigger region once can be carried out to a plurality of shaking towards the ware combination, improves the efficiency of construction at double, effectively reduces cost of labor and mechanical machine -team cost. The construction AND operation is simple and convenient, and it is fixed towards the interval between ...

Copper oxide-doped titanium iridium dioxide anode with surface rich in iridium dioxide, and making method thereof

The invention provides a copper oxide-doped titanium iridium dioxide anode with the surface rich in iridium dioxide, and a making method thereof. The making method of the anode comprises the following steps: 1, titanium substrate pretreatment; 2, coating solution preparation: dissolving a CuO precursor and an IrO2 precursor in an ethanol and isopropanol mixed solvent to prepare a precursor coating solution; 3, thermal decomposition preparation of a coating: uniformly covering the obtained pretreated titanium plate with the coating solution through using a dip-coating process, roasting, cooling, repeating coating, drying, roasting and cooling processes many times, roasting at 300-500DEG C at the last time for 1-3h, and naturally cooling to room temperature; and 4, post-treatment: putting a coated electrode made in step 3 in concentrated sulfuric acid or dipping the coated electrode in dilute sulfuric acid, and carrying out electrochemical treatment. The electrocatalytic activity and the ...

Electrolytic bath for grouped electrolyzed oxidizing water generator

The invention relates to an electrolytic bath for a grouped electrolyzed oxidizing water generator, which comprises two pressing plates (1), two or more groups of unit cell banks (8) and a water channThe invention relates to an electrolytic bath for a grouped electrolyzed oxidizing water generator, which comprises two pressing plates (1), two or more groups of unit cell banks (8) and a water channel plate (7); wherein the pressing plates (1), the unit cell banks (8) and the water channel plate (7) are juxtaposedly arranged, the unit cell banks (8) and the water channel plate (7) are tightly clel plate (7); wherein the pressing plates (1), the unit cell banks (8) and the water channel plate (7) are juxtaposedly arranged, the unit cell banks (8) and the water channel plate (7) are tightly clamped between the two pressing plates (1), and the water channel plate (7) is arranged between the adjacent unit cell banks (8). Compared with the prior art, the electrolytic bath for the grouped elecamped ...

Preparation and use of low-temperature low-viscosity liquid crystal compositions

The invention provides preparation and use of low-temperature low-viscosity liquid crystal compositions. The compositions have relatively low viscosity and relatively small temperature dependency under the condition of low temperature, can meet all low-temperature performances needed by liquid crystal materials, and can be used for manufacturing liquid crystal display devices, improving low-temperature liquid crystal display performance and increasing the response speed of liquid crystal low-temperature display. The liquid crystal compositions are characterized by comprising the compound of formula (I), in the formula, R is alkyl or alkoxyl with 1-12 carbons, X is -R, -F, -Cl, OCF3, CF3, CF2CF3 or OCHF2, Y is -H or -F, A is phenylene or cyclohexylidene, or cyclohexane or an aromatic ring, wherein the cyclohexane or the aromatic ring is substituted by -F or -Cl; and when Y is -H, X is not -R or -F. The compound has low-temperature low viscosity and the relatively small temperature dependency ...

Preparation and use of low-temperature low-viscosity liquid crystal compositions

Anion exchange membrane synthesized in water phase and preparation method thereof

The invention discloses a water-phase synthesized anion exchange membrane and a preparation method thereof, and the preparation method comprises the following steps: (1) dissolving chitosan in a first water-based solvent to obtain a chitosan solution; (2) uniformly mixing a chitosan solution and a polydiene dimethyl ammonium chloride aqueous solution, and centrifugally defoaming; separating out a gel film in a second aqueous solvent; (3) desalting and dehydrating the gel membrane to obtain a chloride ion type anion exchange membrane; and carrying out ion exchange on the chloride ion type anion exchange membrane to obtain the oxyhydrogen type anion exchange membrane. The preparation method of the anion exchange membrane is simple, green and environment-friendly. The obtained anion exchange membrane has the characteristics of uniform membrane formation, low swelling, relatively high water content and ionic conductivity and excellent chemical stability.

Method for preparing methylsulphonic acid from halogenated methane

The invention discloses a method for preparing methylsulphonic acid from halogenated methane, which comprises the following steps of: reacting aqueous solution of sulfite with the halogenated methane at the temperature of between 60 and 105 DEG C to form methylsulfonate; acidifying the methylsulfonate with strong acid to form solution of methylsulphonic acid and corresponding halate precipitate; and performing distillation under reduced pressure after filtering to obtain the methylsulphonic acid with high yield and purity, wherein the reclaimed acid aqueous solution can be recycled. The method has the advantages of high reaction specificity, no pungent smell, no waste water and residue, high product purity, a few trace impurities, readily available raw materials, simple operation, low cost and industrial mass production application prospect.

Electrolytic bath for grouped electrolyzed oxidizing water generator

The invention relates to an electrolytic bath for a grouped electrolyzed oxidizing water generator, which comprises two pressing plates (1), two or more groups of unit cell banks (8) and a water channel plate (7); wherein the pressing plates (1), the unit cell banks (8) and the water channel plate (7) are juxtaposedly arranged, the unit cell banks (8) and the water channel plate (7) are tightly clamped between the two pressing plates (1), and the water channel plate (7) is arranged between the adjacent unit cell banks (8). Compared with the prior art, the electrolytic bath for the grouped electrolyzed oxidizing water generator comprises two pressing plates and two or more groups of the unit cell banks, wherein each unit cell bank comprises a plurality of juxtaposedly arranged unit cells, each unit cell is supplied with power by respective power supplies, and the control to the power supplies is convenient, therefore, the electrolyzed oxidizing water generation amount can be improved by ...

Graded electrolyzed oxidizing water generation system

The invention relates to a graded electrolyzed oxidizing water generation system which comprises two grade electrolytic bath devices or more grade electrolytic bath devices, wherein each grade electrolytic bath device comprises an electrolytic bath; the electrolytic bath comprises a main water inlet opening, a main acidic water outlet and a main alkaline water outlet; the main acidic water outlet of the electrolytic bath of the previous-grade electrolytic bath device is communicated with the main water inlet opening of the electrolytic bath of the next-grade electrolytic bath device; and the main acidic water outlet of the electrolytic bath of the final-grade electrolytic bath device is used for discharging. Compared with the prior art, the graded electrolyzed oxidizing water generation system adopts the grading mode, enables the acidic water produced by the previous-grade electrolytic bath device to be delivered to the next-grade electrolytic bath device and can effectively reduce the ...

Rice bran pre-pressing oil preparation and instant stabilization method

The invention discloses a rice bran pre-pressing oil preparation and instant stabilization method, and solves the problems of complex process, huge equipment, difficult control, nutrient loss, high risk of harmful substance generation and the like in the existing rice bran pressing oil preparation. According to the technical scheme, the method comprises the following steps of screening, wherein broken rice and other large-particle impurities in rice bran are removed through screening; wetting: adding the dielectric solution into the rice bran, and uniformly mixing to obtain wet rice bran; ohmic heating: compacting the moistened rice bran and performing ohmic heating treatment on the moistened rice bran to obtain rice bran clinker; drying: drying the rice bran clinker; and squeezing, namely squeezing the dried rice bran clinker to prepare oil, and simultaneously obtaining the stabilized rice bran squeezed cake. The technology is light and simple, equipment is compact, control is accurate ...

Making method of platinum iridium oxide alloy electrode

The invention discloses a making method of a platinum iridium oxide alloy electrode. The method includes the following steps: heating and stirring a platinum salt and sodium nitrate mixed solution to 55-65DEG C, carrying out evaporating crystallization, drying, grinding, calcining to obtain a mixture, washing the mixture by water to remove impurities, carrying out full wet grinding, and dispersing the wet ground mixture in a solvent to obtain a platinum dioxide solution; dispersing an iridium salt in the solvent, adding the platinum dioxide solution, adjusting the pH value to 14 by using sodium hydroxide, and dissolving and dispersing to obtain a coating solution; and coating a titanium plate with the coating solution, drying, calcining at 400-700DEG C, and cooling in air to obtain the platinum iridium oxide alloy electrode. The above platinum iridium oxide titanium anode electrocatalysis material prepared in the invention has the characteristics of fine crystsal grains and honeycomb shape ...

Preparation method of supported flower-shaped copper oxide and method for deeply removing hydrogen phosphide from yellow phosphorus tail gas

The invention provides a preparation method of supported flower-shaped copper oxide and a method for deeply removing hydrogen phosphide from yellow phosphorus tail gas. Supported flower-shaped copper oxide is prepared by a hydrothermal method. The preparation method comprises the steps of grinding, screening and dispersing of active carbon or other porous materials, copper supporting, hydrothermal reaction, suction filtration, dryness, roasting and the like. The method for deeply removing hydrogen phosphide from the yellow phosphorus tail gas takes supported flower-shaped copper oxide as an adsorbent and comprises the steps of pretreatment, preheating, absorbent refining, cooling, separation and the like. Supported flower-shaped copper oxide has the ability of deeply purifying hydrogen phosphide, can deeply remove hydrogen phosphide impurities from the yellow phosphorus tail gas, and allows concentration of hydrogen phosphide to be less than 1ppm.

Preparation method of iridium and copper oxide alloy cathode catalyst

The invention discloses a preparation method of an iridium and copper oxide alloy cathode catalyst. The preparation method comprises the steps as follows: (1) dissolving iridium metal salt and copper metal salt in a solvent; (2) adding a sodium nitrate solid in the solution, evenly mixing the sodium nitrate solid and the solution, and heating the obtained solution under the condition of continuous stirring, continuously stirring the solution until the solvent is completely volatilized, and then completely drying the mixture to obtain a dry salt mixture; (3) grinding and then roasting the cooled dry salt mixture to obtain a salt oxidation mixture, and washing the mixture with deionized water after cooling the mixture to the room temperature; (4) placing roasted powder into an HCl or H2SO4 aqueous solution, stirring the solution, after the solution is clarified through standing, sucking a supernatant liquid; then adding the HCl or H2SO4 aqueous solution again, and continuously stirring until ...

Method for electric field to absorb and purify liquid crystal

The invention particularly relates to a method for an electric field to absorb and purify a liquid crystal. The method adopts an electric field absorbing and purifying device which is provided with the following three intervals: a cathode solvent chamber, an anode solvent chamber and a middle purifying chamber. Ion permeable membranes are respectively arranged between the cathode solvent chamber and the middle purifying chamber, and between the anode solvent chamber and the middle purifying chamber. A negative electrode is inserted in the cathode solvent chamber, and a positive electrode is inserted in the anode solvent chamber. When the device is applied for purification, liquid crystal material solution is arranged in the middle purifying chamber, absorbing agents and solvents are respectively arranged in the cathode solvent chamber and the anode solvent chamber, DC or AC electricity is switched on between the two electrodes, and finally high-purity liquid crystal materials are extracted ...