Preparation method for polishing powder used for high performance devices such as liquid crystal display

The invention discloses a preparation method for polishing powder used for high performance devices such as liquid crystal display, which is characterized in that polishing powder microscopic morphology is polyhedral spherical shape, the corner angle of the particle with the above morphology is standard and uniform, scratch is not generated during a polishing process, the polyhedral structural powder has controllable morphology; the particle size distribution is uniform, average volume particle size D50 by a laser diffraction method is 0.7-2.0mum, specific surface area is 1.0-3.5m<2>/g; the dispersibility and suspensibility are good, potential of Zeta is -47mV, the polished surface is shine and neat, no scratch is generated on the surface; the cleaning performance and grinding speed of the product are better than that of certain product on market; the method comprises the following steps: adding cerous carbonate, lanthanum cerium carbonate or lanthanum cerium carbonate praseodymium in a ...

Electrolysis adsorption method and comprehensive utilization method of seawater deep pretreatment

The invention discloses an electrolysis adsorption method and comprehensive utilization method of seawater deep pretreatment. The comprehensive utilization method comprises the following three steps: performing sand filtration, performing electrolysis adsorption, settling and obtaining byproducts. Under the non-diaphragm condition, seawater is directly electrolysed after sand filtration to obtain magnesium hydroxide precipitate which can be used to absorb the suspended matter, microorganism, organic matter and the like in seawater; and then efficient trace coagulant aid is added to achieve the aim of reducing the turbidity, sludge density index (SDI), chemical oxygen demand (COD), microorganism content and the like of seawater and obtain the byproducts such as hydrogen, chlorine, sodium hypochlorite and acid wastewater neutralizer slurry. The comprehensive utilization method has good comprehensive effect. The technology of the invention can be implemented to promote the developments of ...

Method for preparing flocculating agent by using refractory cement and roasted slag of iron pyrite

Benzene anhydride recovering and refining method from rectified residue

The present invention is benzene anhydride recovering and refining method from rectified residue. Exhausted residue containing great amount of benzene anhydride and various impurities, such as high-boiling point matters, earth, sand, etc. is crushed and water dissolved without passing through decoloring with active carbon, and phthalic acid is collected from solution and then dewatered and rectified to obtain refined benzene anhydride. The present invention is one clean production process and has the features of benzene anhydride purity of 30 %, no need of decoloring with active carbon, high benzene anhydride recovering rate up to 95 %, reuse of water as solvent and reaction reagent, etc.

Electrocoagulation sea water pretreatment

The invention relates to a novel reverse-osmosis seawater desalinization pre-processing method, namely an electro-coagulation method. When DC is switched on, high-pure aluminum plates or iron plates are adopted as electrodes to directly electrolyze sea water, and aluminum hydroxide or iron hydroxide floc units generated in electrolysis agglomerates the suspended matters, microorganisms and organic matters, etc. in seawater so as to reach the purpose of reducing seawater turbidity, SDI, COD and microorganisms, etc. Simultaneously, hydrogen can be obtained. The high-effective coagulant aid is added to enhance the settling speed of hydroxide floc units. The invention provides a novel method and a simple process, and the reaction condition of the invention is mild and can be controlled easily. The method of the invention can profoundly promote the comprehensive exploitation to seawater, and the meaning of the theory and practice is significant and the invention can bring revolutionary changes ...

用耐火水泥-硫铁矿烧渣制备絮凝剂的方法

The present invention relates to a method for preparing flocculant by using refractory cement-sulfurous iron ore roasted slag. It includes the following steps: mixing refractory cement containing aluminium, silicon and iron and sulfurous ion ore roasted slag powder according to the ratio of 1:1-6:1, making partial solid mixed material and dilute hydrochloric acid with a certain concentration react at 50 deg.C-130 deg.C for 5-20 min, adding residual solid mixed material and concentrated hydrochloric acid with a certain concentration, making reaction for 20-60 min, then adding water and activating for 20-60 min. so as to obtain the invented flocculant product. The invented flocculant can be used for treating industrial waste water, and can obtain good treatment effect.

Process for decomposing Baotou rare earth ore concentrate and treating tail gas by medium-temperature reinforced roasting method

The invention belongs to the field of rare metal metallurgy and environmental protection. A process for decomposing Baotou rare earth ore concentrate and treating tail gas by a medium-temperature reinforced roasting method inherits the advantages of the conventional domestic and overseas rare earth ore concentrate decomposition methods; the rare earth metal recovery rate of the method is 0.8 to 2 percent higher than that of an original process, and the tail gas amount of the method is only 20 percent that of the original process; and hydrogen fluoride gas produced by the decomposition of the ore concentrate reacts with alkaline substances such as alumina and the like to produce fluoride salt, so that the problem of treatment of tail gas spray waste water is solved, and no acidic waste water is drained. Dividing wall heating is adopted, so that roasting temperature and roasting time can be controlled accurately; a combustion chamber is separated from a rotary kiln, so that the defects of ...

Method for preparing composite water evaporation inhibitor

The invention prepares composite water evaporation inhibitor through adopting the built technology. The technical characteristics are that long-chain fatty alcohol and short-chain alcohol are remixed into molecular film base material, stable solution is prepared through dissolving appropriate spreading solvent which is chosen in ambient temperature, thereby obtaining the water evaporation inhibitor. The water evaporation inhibitor which is obtained through the process can automatically spread out on the water level to form an insoluble molecular film, which has favorable temperature interference resistance ability, matter interference resistance and self-restoring ability, and the efficiency of inhibiting water evaporation is reduced as time prolongs, thereby having excellent stability. The preparation process of the invention is simple, and can be prepared in-situ. The water evaporation inhibitor which is prepared has extensive application prospect in water resource protection field,has ...

Method for preparing composite water evaporation inhibitor

The invention prepares composite water evaporation inhibitor through adopting the built technology. The technical characteristics are that long-chain fatty alcohol and short-chain alcohol are remixed into molecular film base material, stable solution is prepared through dissolving appropriate spreading solvent which is chosen in ambient temperature, thereby obtaining the water evaporation inhibitor. The water evaporation inhibitor which is obtained through the process can automatically spread out on the water level to form an insoluble molecular film, which has favorable temperature interference resistance ability, matter interference resistance and self-restoring ability, and the efficiency of inhibiting water evaporation is reduced as time prolongs, thereby having excellent stability. The preparation process of the invention is simple, and can be prepared in-situ. The water evaporation inhibitor which is prepared has extensive application prospect in water resource protection field, has ...

In situ preparation method of thiourea dioxide in paper-pulp decolorization

The invention adopts a method that thiourea and oxydol are taken as raw materials to directly make thiourea dioxide aqueous solution. The invention has the process characteristics that during the preparation of the thiourea dioxide, the water quantity is increased, the steps of cooling, crystallizing, sucking filtration, and drying, etc. are omitted, and the thiourea dioxide aqueous solution is directly prepared to be used for the paper pulp bleaching. Firstly, the pre-added water quantity is 60 times as the weight of thiourea. Secondly, during the process of the thiourea dioxide preparation, the temperature is controlled in the range of 0 to 10 DEG C. Thirdly, the ratio of the thiourea and the oxydol is 1: 2.05. The yield ratio of the thiourea dioxide prepared through the method can reach 83 percent. The process of the invention is simple, the investment is few, the thiourea dioxide aqueous solution can be made just through the slight improvement on the original process, and the invention ...

Method for preparing heterogeneous water evaporation inhibitor

The invention prepares a heterogeneous water evaporation inhibitor through adopting the emulsification technology. The technical characteristics are that using petroleum ether as oil phase solvent, using fatty alcohol polyoxyethylene ether series as emulsifying agent, remixing long-chain fatty alcohol and short-chain alcohol as molecular film base material, preparing stable W/O elusion through adopting supersonic dispersion, thereby obtaining water evaporation inhibitor. The water evaporation inhibitor which is obtained through the process can automatically spread out on the water level to form an insoluble molecular film, which has favorable temperature interference resistance ability, matter interference resistance and self-restoring ability, and the efficiency of inhibiting water evaporation is reduced as time prolongs, thereby having excellent stability. The preparation process of the invention is simple, and has small requirement for devices. And the product which is prepared has extensive ...

Production of on-line detecting instrument of sodion especially for producing alkali

The invention designs a sodion online detecting instrument based on the Nernst equation, which can realize fast online measuring to the sodion consistency of the high-consistency carbonified liquid in the process of alkali production by adopting the sodion selective electrode as the sensor through a series of signal process. The instrument improves the linear range of the sodion selective electrode through the electric potential compensation and timing machine, which makes the instrument applicable to testing high-consistency solution. The unique separated design of the preamplifier and the mainboard, the application of the large amount of filter capacitors and the increase of ultra-lowpass filtering algorithm bring a very strong capacity of resisting disturbance to the instrument. The application of various precision meter chips greatly improves the testing precision. The above measures guarantee a fast and precise operation of the instrument on the online detecting. The instrument is ...

Sea water advanced pretreatment apparatus

The invention relates to a seawater desalinization depth pre-processing apparatus, belonging to the seawater desalinization technical field. The apparatus mainly comprises a smooth-flow coagulation tank, a sloping-plate settlement tank, a plate-frame filter press and an acidity regulating tank. The seawater is pumped into a head tank through a pump, and flows into the smooth-flow coagulation tank through pipelines and simultaneously a small or micro amount of high-rate flocculating agent, flocculation aid and alkalizer are added through a chemical feed tube; after coagulated, the seawater flows through the settlement tank, a centrifuge and the acidity regulating tank and then flows out. The flocculation and the absorbing effect of magnesium hydroxide are adopted to reach the purposes of reducing seawater turbidity, SDI, COD and microorganisms, etc. The process realizes the continuous depth seawater pre-processing and is provided with the advantages that the efficiency is high; the running ...