Pollution of Sludge and Synthesis of Calcium Compounds in Synthesis of Acetylene with Calcium Carbide and Water

摘要

The present invention is to neutralize the strong alkaline pollution sludge produced by the synthesis of acetylene by adding water to calcium carbide with nitric acid to synthesize calcium nitrate, add caustic soda to the aqueous solution of calcium nitrate to synthesize calcium hydroxide and sodium nitrate, and calcium hydroxide latex with calcium hydroxide. Calcium carbonate was synthesized by passing carbon dioxide gas, and calcium nitrate solution synthesized from carboxyl sludge was added to strong alkaline dyeing wastewater to synthesize calcium hydroxide, and carbon dioxide was added to make neutral solution of PH = 7. It is a method of purifying dyeing wastewater.