System and method for separating pentaerythritol and calcium formate from pentaerythritol mother liquor

Abstract

The invention discloses a system for separating pentaerythritol and calcium formate from pentaerythritol mother liquor. Comprising an extraction tower, a reverse extraction tower, a dilute solvent recovery tower, a solvent recovery tower, a solvent recovery reboiler, a dilute solvent recovery reboiler, a solvent recovery condenser, a solvent recovery tail cooler, a solvent recovery reboiler, a mother liquor feeding pump, an extraction agent feeding pump, a dilute solvent recovery feeding pump, a solvent recovery circulating pump, a solvent recovery discharging pump and a solvent recovery reflux pump, the device comprises a solvent recovery vacuum pump, a mother liquor tank, an extraction agent tank, a raffinate tank, an extraction liquor tank, a dilute solvent recovery layering device and a solvent recovery tower reflux tank, according to the system, the pentaerythritol mother liquor can be circularly and continuously treated, pentaerythritol and calcium formate products separated by the system are high in quality and high in recovery rate, an extracting agent can be separated, recovered and recycled, the treatment cost of separating pentaerythritol and calcium formate from the pentaerythritol mother liquor is greatly reduced, discharged waste liquid is greatly reduced, and the production cost is reduced. And the pressure of environment-friendly treatment is relieved.

Description

technical field [0001] The invention belongs to the technical field of biochemical equipment manufacturing, and particularly relates to a system and a method for separating pentaerythritol and calcium formate from pentaerythritol mother liquor. Background technique [0002] Pentaerythritol belongs to polyol organic compounds, which is white crystal or powder, flammable, and is a key raw material for the production of high solid content, water-soluble and general alkyd resin, rosin ester, synthetic lubricating oil and antioxidant. In the process of producing pentaerythritol, a large amount of mother liquor will be produced. The mother liquor contains a considerable amount of pentaerythritol and calcium formate with industrial value. If the mother liquor is not recovered, not only will a large amount of pentaerythritol and calcium formate industrial products be lost, but also cause serious environmental problems. In the existing mother liquor recovery and treatment process, b...

AI Technical Summary

Problems solved by technology

In the process of producing pentaerythritol, a large amount of mother liquor will be produced, which contains a considerable amount of pentaerythritol and calcium formate with industrial value. If the recovery of the mother liquor is not carried out, not only will a large amount of pentaerythritol and calcium formate industrial products be lost, but also cause serious environmental problems

In the existing mother liquor recovery and treatment process, due to the concentration process, the mother liquor is enriched and viscous, and it is difficult to separate pentaerythritol crystals from the mother liquor. A large amount of pentaerythritol has not been effectively recovered, and the recovery rate of pentaerythritol and calcium formate is low. The solvent consumption is large, the separation cost is high, and the organic matter content in the waste liquid after treatment is high, and there are still serious environmental protection problems

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