Currently, the primary indications for measuring the top quality of turned on clay include task level, decolorization price, decolorization power, complimentary acid, certain surface area, etc. The activity of activated clay (turned on bleaching soil CS-1040) is to change the hydrogen ions in the example with salt acetate option, usage phenolphthalein as the sign, and also titrate with salt hydroxide typical titration option. The salt hydroxide remedy is eaten with 1000g of the sample. [c(NaOH)=1. 000mol/L] expressed in quantity (mL). The decolorization rate is a technical index for reviewing the decolorization efficiency of activated clay on petrochemical items. It makes use of a certain sample to decolorize the kerosene asphalt option. The proportion of the difference between the absorbance E0 of the solution prior to decolorization as well as the absorbance E1 of the service after decolorization and also E0 is called the decolorization price of the sample. The higher the decolorization price, the higher the activity. The much better the lightening efficiency of clay.
The decolorization rate is shared as a percentage, that is: decolorization rate example = (E0 -E1)/ E0 × 100%. The decolorizing power is a technical index to examine the decolorizing efficiency of triggered clay on oil products. Under the same test problems, pick a common dirt with moderate decolorization power and decolorize the same grease medium as the example. When the decolorization result is the same, the proportion of the sample quantity W1 of the conventional dirt to the sample quantity W2 of the sample is increased by The decolorizing power value of the standard soil is the decolorizing power of the sample, that is: the decolorizing power of the example = decolorizing power value of the common soil × W1/W2.
Cost-free acid is the residual acid in the sample seeped with water, using phenolphthalein as the sign as well as titrating with salt hydroxide typical option. 1.000 mol/L salt hydroxide conventional service 1.00 mL is expressed by the mass of 0.049 g sulfuric acid, shared per gram of sample It includes a percent equivalent to the mass of sulfuric acid to share the dimension of the totally free acid. The smaller the totally free acid, the smaller sized the waste acid material as well as the more thorough the cleaning. The specific surface is the area of the example each mass, shared in m2/g. Huge details surface area has greater adsorption ability. Concerning the decolorization rate, activity, as well as free acid of turned on clay products, the market common HG/T2569 -94 authorized by the Ministry of Chemical Sector of my country in 1994-02-09 manages this.
Concerning decolorization power, the market requirement of the Ministry of Chemical Market does not have needs, however the enterprise standard of Zhejiang District is ≥ 110. In international countries, the decolorization effect is not gauged by decolorization price and decolorization power, but by specific surface. Japan’s NHK powdered activated clay top quality requirement is 200 ~ 300m 2/ g, and the decolorization power of international items is generally above 200. It can be seen from the above requirements that the decolorization rate of my country’s chemical sector requirements and the decolorization power of enterprise criteria are relatively low. This is not valuable for improving the top quality of turned on clay in my country in its entirety. In fact, by choosing the most effective process problems, the decolorization price of the item can get to greater than 95%, the task level is greater than 220, and also the decolorization power can get to 150 to 200.
