Production method for preparing ammonium sulfate by alkylating waste acid

Abstract

The invention relates to a production method for preparing ammonium sulfate by alkylating waste acid. The production method consists of four parts namely neutralization reaction, flotation oil removal, activated carbon filtration and crystallization, and specifically comprises the following steps: enabling waste acid and ammonia water to perform neutralization reaction in a reactor; conveying hot steam which is produced by reaction to a raw material liquid ammonia vaporizer and a crystallizer by virtue of a steam pipeline to be applied to liquid ammonia vaporization and ammonium sulfate solution crystallization processes; performing flotation oil removal on the ammonium sulfate solution obtained by reaction and air by virtue of steam stripping flotation, and then performing activated carbon decoloration and deodorization on the ammonium sulfate solution after being subjected to flotation oil removal; and crystallizing the ammonium sulfate solution after being subjected to activated carbon adsorption to prepare an ammonium sulfate crystal. By adopting the production method disclosed by the invention, the problems that waste sulfuric acid is difficult to treat and polymerized oil is difficult to recycle can be solved, an alkylation process can be improved, and 13-15% of the total cost of the alkylation process can be reduced; and compared with a conventional ammonium sulfate preparation process, the time and cost can be saved, and the production efficiency can be increased by more than 20%.

Description

technical field [0001] The invention relates to a production method for preparing ammonium sulfate by alkylating waste acid. Including neutralization reaction, flotation to remove oil, decolorization and deodorization, evaporation and crystallization and other processes. Background technique [0002] In recent years, with the rapid development of the national economy, the market demand for high-octane gasoline has also increased, and alkylated oil has broad market potential. However, in the alkylation industry, 80-100 kg of waste sulfuric acid with a concentration of about 90% will be produced for every 1 ton of alkylated oil produced. The waste sulfuric acid is black and red, has a high viscosity, is extremely turbid, unstable in nature, and emits a special odor. smell, it is difficult to deal with, and it brings serious pollution to the ecological environment. Its composition also contains 10% organic matter (polymerized oil) and moisture except sulfuric acid, and the co...

AI Technical Summary

Problems solved by technology

[0006] According to the deficiencies in the prior art, the present invention proposes a production method for preparing ammonium sulfate by alkylating waste acid, which solves the problems of difficult disposal of waste sulfuric acid and difficult recovery of polymerized oil, improves the alkylation process, and further reduces the production of ammonium sulfate. Production cost of carburetor

At the same time, it solves the problems of serious waste of heat energy, high time consumption, low production efficiency, low product purity, and yellowing of ammonium sulfate crystals in the traditional ammonium sulfate preparation process, and prepares ammonium sulfate crystals with higher purity and better product phase. In addition, the thermal energy cycle Utilizing energy-integrated, environment-friendly and efficient solutions for chemical waste

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