Furfural waste water disposal method capable of producing acetone

Abstract

The furfural waste water treating process capable of producing acetone belongs to the field of environment protecting technology. The furfural waste water treating process includes the following steps: 1. adding alkaline neutralizing agent into furfural waste water to produce neutralization forming calcium acetate; 2. separating calcium acetate; and 3. decomposing thermally to obtain acetone. The present invention has the advantages cheap neutralizing agent of calcium carbonate, calcium oxide or calcium hydroxide, and greatly lowered COD load of treated waste water, and obvious economic utility.

Description

technical field

[0001] The invention belongs to a treatment method for furfural wastewater and belongs to the field of environmental protection. Background technique

[0002] Furfural is an important chemical raw material for basic organic synthesis. During the production process, a large amount of waste water, waste gas, and waste residue are produced, which seriously pollutes the environment. Due to the serious environmental pollution caused by furfural production, some economically developed countries in the world would rather pay high prices to transfer the pollution to the environment, and transfer their pollution to underdeveloped countries.

[0003] The wastewater produced by furfural production has a large discharge volume, high temperature, low pH value, 1-2.5% acetic acid content, and a high pollutant concentration of 15000mg / l COD cr . The governance process is complex and difficult. Most of the biochemical methods and physicochemical methods are used, and most...