calcium carbonate thereby precipitating calcium sulphate; passing the slurry thus produced to a second zone; adding to the second zone an aqueous solution of sulphuric acid containing from 3 to 80 grams/liter of free sulphuric acid; adjusting the pH value of the mixture in the second zone to ...
The reaction between sulfuric acid and calcium carbonate is similar in some ways to the reaction with baking soda — the carbon dioxide bubbles off, and the salt that remains behind is calcium sulfate. Reacting sulfuric acid with the strong base sodium hydroxide will make sodium sulfate, while s...
Fluorapatite is treated with 93% sulfuric acid to produce calcium sulfate, hydrogen fluoride (HF) and phosphoric acid. The HF is removed as hydrofluoric acid. The overall process can be represented as: Ca5F(PO4)3 + 5 H2SO4 + 10 H2O → 5 CaSO4 2 H2O + HF + 3 H3PO4 ...
Sulfuric Acidor Sulphuric Acidis a mineral acid composed with molecular formula H2SO4. It is a colorless, odorless, and syrupy liquid that is soluble in water and is synthesized in reactions that are highly exothermic. It is corrosiveness and hygroscopic. Contact, sulfuric acid can cause severe...
Butyric acid LDPE / HDPE at 50°C: immediate damage may occur. HDPE at 20°C: shows some effect after 7 days. Calcium chloride LDPE / HDPE at 20°C-50°C: little or no damage after 30 days. Calcium...
The method includes: during removal of iron from the nickel sulfate solution containing iron and free sulfuric acid, taking calcium carbonate as a pH regulator of the solution, and simultaneously adding an anhydrous calcium sulfate seed crystal, inducing the calcium in the solution to crystallize ...
The additives such as phosphoric acid, calcium phosphate, calcium super phosphate, calcium over-super phosphate, calcium carbonate, sodium hydrosulphite, e... Jun-feng,Liu,Ping-gui,... - 《Journal of Environmental Sciences》 被引量: 2发表: 2000年 加载更多0...
Write a balanced equation for the reaction between nitric acid and potassium carbonate. Express your answer as a chemical equation. Identify all of the phases in your answer. Write a balanced chemical equation for calcium nitrate plus sulfuric acid produces calcium sulphate a...
In order to meet one or more of the identified objects, the present invention advantageously includes a method for treating raw or modified CKD using waste or by-product sulfuric acid solution to form a gypsum product. Raw CKD, or primary CKD, contains the highest level of calcium carbonate ...
In this study, a method for preparing pure manganese sulfate from low-grade ores with a granule mean size of 0.47 mm by direct acid leaching was developed. The effects of the types of leaching agents, sulfuric acid concentration, reaction temperature, and agitation rate on the leaching ...