摘要:
A polymer of a water-soluble radical-polymerizable monomer which has nitroxy group at an end of the molecule; a process for producing a polymer of a water-soluble radical-polymerizable monomer which comprises polymerizing the water-soluble radical-polymerizable monomer in the presence of a polymerization initiator in an aqueous solution containing a nitroxy radical; and a flocculant which comprises a polymer of a water-soluble radical-polymerizable monomer produced in accordance with the process. The polymer of a water-soluble radical-polymerizable monomer has a narrow molecular weight distribution, has nitroxy group at the end of the molecule and is useful as a flocculant in the dewatering treatment of organic sludge. The polymer is produced by the living radical polymerization in accordance with the process. The flocculant comprises the polymer.
摘要:
The electrodeionization apparatus improves the removal rate of weakly - ionized species including silica and boron, and which species including slica and boron, and is useful for a primary pure water system and a reclaim system. The apparatus for producing purified water produces the product water of high quality including the resistivity of equal to or more than 18.0 MΩ · cm can be provided. The electrodeionization apparatus 3A has a plurality of cation exchange membrane and plurality of anion exchange membrane alternately arranged between electrodes in such a manner as to alternately form diluting compartments and concentrating compartments. The diluting compartments are filled with an ion exchanger. The product water having pH exceeding pH of the feed water by 1.0 or more when the feed water having pH of equal to or less than 8.5 is treated without adding alkaline agents. The apparatus for producing purified water has plural electrodeionization apparatuses 3A, 3B connected each other so that the feed water flows through the electrodeionization apparatuses.
摘要:
Heat exchange water for cooling an object of heat exchange such as machinery, air, or liquid, which serves to prevent oxidation and deterioration of metal materials used in pipes for supplying/circulating the heat exchange water or in the liquid ends of the heat exchanger, to suppress growth of algae and microorganisms, and to reduce influence on the environment. The heat exchange water is reductive water having zero or negative standard oxidation-reduction potential as determined on the basis of the hydrogen electrode standard.
摘要:
A spiral wound type membrane module comprising a plurality of membranes wound about an axis of the module to form a roll of said membranes and to form feed water channels between said membranes into which feed water flows via a front end of the roll and from which nonpermeated water flows out via a rear end of the roll, wherein said module is operated such that a differential pressure between the feed water flowing into said channels and the nonpermeated water flowing out from said channels is 0.3 kg/cm 2 or less. The pressure of the feed water is kept at P Fmax or an approximate value of P Fmax which brings a maximum permeate flux at the moment when a predetermined period has passed after starting to supply the feed water into the membrane module continuously at a constant pressure.
摘要翻译:一种螺旋卷绕型膜组件,其包括围绕组件的轴线缠绕的多个膜以形成所述膜的卷并且在所述膜之间形成供给水通道,供给水经由所述辊的前端流入所述供给水通道中,并且未渗透 水经由所述辊的后端流出,其中所述模块操作成使得流入所述通道的供水与从所述通道流出的未渗透水之间的压差为0.3kg / cm 2或更小。 给水压力保持在PFmax或PFmax的近似值,该PFmax在开始以恒定压力连续供给给膜组件时经过预定时间时带来最大渗透通量。
摘要:
A cleaning solution for electromaterials including hydrogen fluoride and either oxygen or hydrogen gas dissolved in water. The cleaning solution may alternatively include hydrogen fluoride, hydrochloric acid or nitric acid, and hydrogen or oxygen gas dissolved in water. Alternatively, the cleaning solution includes hydrogen fluoride, hydrogen peroxide and oxygen gas dissolved in water. The present invention also provides a method for cleaning electromaterials including applying an ultasonic vibration to cleaning solution applied to electromaterials.
摘要:
The water of a water system is treated to inhibit corrosion of metal components by passage through an anion exchanger preloaded with corrosion-inhibiting anions. A low molecular weight polymer is added. A chlorine containing slime controlling agent is added. The concentration of the chloride ion in water is maintained below 50 mg/L.