GT-CARŪ

GTC's GT-CAR® Recovery process combines liquid-liquid extraction technology with distillation to recover and concentrate carboxylic acids from wastewater. The use of a high boiling solvent enables the process to attain the lowest energy use of any commercially available process, with minimal capital costs. The recovered acids may be sold as high purity products or recycled back to the process. The biological oxygen demand of the resulting wastewater stream is greatly reduced.

GTC's GT-CAR® process is economical for any aqueous stream generated in the production of dimethyl terephthalate (DMT), purified terephthalic acid (PTA), pulp/paper, furfural, and other processes. Acids concentrations of 0.5-3.0% can be treated with increasingly attractive economics.  High purity formic acid or acetic acid are typical products.

Advantages:

•  Up to 98% of the acids can be recovered
•  Acids concentrations as low as 0.5% can be economically recovered
  
• Low capital investment results in typical ROI up to 40 %
  
• Modular systems approach means minimal disruption of plant operation and shorter project schedule
• Use of high-boiling solvent gives high acid recovery and substantial energy savings
• Solvent is easily separated from water, giving a solvent-free (<20 ppm) wastewater exit stream
• The carboxylic acid product purity allows for recycle or resale
• High acid recovery provides environmental benefits, unloading biological treatment systems