To make viscose fiber, To start with use eighteen%-20% sodium hydroxide solution to impregnate the cellulose to make it into alkali cellulose, then dry and crush the alkali cellulose, And at last dissolve the sulfonate with dilute lye to obtain viscose liquid. After filtering and vacuuming, it can be utilized for spinning.
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This method uses the ion exchange membrane process to electrolyze salt drinking water, and then make sodium hydroxide. The main theory would be that the cation exchange membrane applied has Particular selective permeability. That may be, only H+ and Na+ are allowed to move, but Cl-, OH-, the bipolar products H2 and Cl2 can’t move.
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Right after pickling, the petroleum even now is made up of acidic impurities for example phenol, naphthenic acid and extra sulfuric click here acid, which has to be washed with sodium hydroxide solution. After which washed with drinking water to obtain refined petroleum products. It will also be Employed in oilfield drilling mud.
Caustic soda pearls appear as white spherical or semi-spherical granules with a little perceptible shade. Caustic soda pearls are water-soluble using an exothermic response, they usually depict steadiness in standard situations.
For indigo dyes and quinone dyes. In the dyeing means of vat dyes, it is initial minimize to leuco acid with caustic soda solution, then oxidize it to the initial insoluble condition with oxidizing agent soon after dyeing.
Characterisics: white good or flakes with solid corrosiveness,very easily soluble in h2o, presenting alkaline solution and heat liberation,presenting deliquescence when subjected to air.
It's Utilized in the pulp and paper field throughout the cooking approach and oxygen delignification process.