![]() the preparation method of reagent cobalt chloride hexahydrate according to claim 8 is characterized in that: described waste gas adopts alkaline absorption solution to absorb. The method has the advantages of simple operation, rapid reaction, short producing flow, high production efficiency, mild process condition, easily controlled property and application in mass commercial process. The products acquired by using the method meet the analytically pure standard of GB/T 1270-1996 chemical reagent cobalt chloride hexahydrate. The method of the invention generates no other impurities except the target products, gas and water in the reaction process, and can obtain pure cobalt chloride hexahydrate. The method comprises the following steps of: reacting a metal cobalt slice with a concentrated nitric acid so as to generate a cobalt nitrate, directly reducing the cobalt nitrate by using formaldehyde in the condition of the esistence of hydrochloric acid so as to remove the nitrate radical to generate a cobalt chloride solution, filtering, concentrating and cool crystallizing so as to acquire the cobalt chloride hexahydrate. ![]() The invention provides a method for preparing a reagent cobalt chloride hexahydrate. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Guangdong Guanghua Science And Technology Co Ltd filed Critical Guangdong Guanghua Science And Technology Co Ltd Priority to CN2010100194600A priority Critical patent/CN101774651B/en Publication of CN101774651A publication Critical patent/CN101774651A/en Application granted granted Critical Publication of CN101774651B publication Critical patent/CN101774651B/en Status Active legal-status Critical Current Anticipated expiration legal-status Critical Links Original Assignee Guangdong Guanghua Science And Technology Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Guangdong Guanghua Science And Technology Co Ltd Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 陈旭波 王志勇 谭泽 杨超 李春花 Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number CN2010100194600A Other languages Chinese ( zh) In contrast, the ion product ( Q) describes. Whereas solubility is usually expressed in terms of mass of solute per 100 mL of solvent, Ksp is defined in terms of the molar concentrations of the component ions. Google Patents CN101774651B - Method for preparing reagent cobalt chloride hexahydrate The equilibrium constant for a dissolution reaction, called the solubility product ( Ksp ), is a measure of the solubility of a compound. All sulfates are soluble except strontium sulfate and barium sulfate.CN101774651B - Method for preparing reagent cobalt chloride hexahydrate.All carbonates, sulfides, oxides and hydroxides are insoluble.All chlorides, bromides and iodides are soluble.All silver, lead and mercury(I) salts are insoluble.All nitrates, acetates and perchlorates are soluble.All sodium, potassium, and ammonium salts are soluble.The following solubility rules can be used to determine solubilities in water, with the disclaimer that they don't always hold, nor do they include every ion which is in common use, but they are good to have nearby when needed: If its solubility is between 0.01 and 0.1 mol/L, we say that it is slightly soluble. If its solubility is greater than 0.1 mol/L, we call it soluble. We call any substance insoluble its solubility is less than 0.01 mol/L. \)Īlthough all compounds have a characteristic solubility in water at a given temperature, some families of compounds are more soluble than others and it is useful to know certain general rules of solubility.
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