Process of separating and purifying 1,3-propylene glycol of fermented liquid in a four-area simulating mobile bed

Abstract

The process of separating and purifying 1, 3-propylene glycol of fermented liquid in a four-area simulating mobile bed includes the following steps: 1. filtering and ultrafiltering the fermented liquid of 1, 3-propylene glycol to eliminate cell, thallus, solid matter and protein and lower the viscosity of the material liquid; 2. decolorizing the filtered fermented liquid; and 3. separating 1, 3-propylene glycol liquid of 5-40 g / l concentration in a simulating mobile bed system with cationic exchange resin, eluting with pH 2-14 deionized water, and collecting 1, 3-propylene glycol in high purity and impurity from different ports. The present invention separates and purifies target product by means of the physical, chemical and biological differences between the target product and the impurity, and has high preparing efficiency and high product purity.

Description

technical field

[0001] The invention belongs to the field of chemical raw material product processing, and relates to a method for separating and purifying 1,3-propanediol in a fermentation liquid with a four-zone simulated moving bed. Background technique

[0002] 1,3-Propanediol (1,3-PD) is a colorless, transparent, odorless liquid, miscible with water, alcohol, ether, etc., insoluble in benzene, chloroform, is an important chemical raw material, is the production of polyethylene terephthalic acid An important monomer of propylene glycol ester (PTT). 1,3-propanediol is an important organic chemical raw material. It can replace ethylene glycol and butanediol, and can be used as a monomer for synthesizing polyester and polyurethane, as well as a solvent, antifreeze or protective agent, etc. It can also be used in the synthesis of medicine and as an intermediate in organic synthesis. It can also be used as a raw material for the production of polyester PTT. The current pro...