In addition to providing R&D services to our clients, we at AST are also continuously working to develop an improved organosolv process, covered by two patents (USPTO-9365525-B2 and USPTO-9382283-B2).

Currently, AST is actively seeking partners to develop new lignin-based products. Contact us for details.


When applied to lignocellulosic materials, AST’s proprietary organosolv process produces high quality pulp demonstrating very similar properties to pulp produced by other traditional methods such as Kraft or sulfite. The required lignocellulosic materials come from annual plants, grown locally, providing additional benefits to AST pulp.

Some advantages of AST pulp include:

  • Commercial quality pulp products that can be used in industry, immediately.
  • Produced from locally grown lignocellulosic material, replacing pulp that is mostly being imported from other regions of the world.
  • Local harvests and local production create local jobs and strengthens local and rural economies

AST pulp can be used for:

  • Cardboard and paper manufacturing.
  • Wrapping paper for household goods, medicines, or food items.
  • Economically converted to glucose via enzymatic hydrolysis.


The AST organosolv process also produces pure lignin, as a byproduct, which has been successfully blended with other polymers to produce plastic parts and products, without compromising their mechanical properties. 

This advantage allows AST to add further value to its clients’ biomass by blending the recovered lignin with various polymers including poly lactic acid, polypropylene, and polyethylene.

AST has developed three proprietary processes to produce lignin:


  • Low sulfur < 1%
  • High purity
  • Low molecular weight distribution
  • Water insoluble


  • High thermal stability
  • Water insoluble
  • Good for ceramic applications


  • Water soluble
  • Good for cement additive


Concentrated sugar syrup is an important element in producing chemicals and fuel, in a cost effective manner. Current processes involve distilled diluted sugar from cane sugar, beets, and enzymatic hydrolysis.

AST has tested and proven its organosolv process during ongoing collaborations with some of its Fortune 500 clients by successfully converting their lignocellulosic biomass into refined fermentable sugars (the same sugar being used to produce-ethanol, butanol, hydrocarbon fuels, and other valuable chemicals). This process reduces production costs, reduces the use of external energy, and reduces the amount of water required and expensive distillation setup. 

Most of the feedstock used by our units come from paper mill, logging, and farm waste which, when processed efficiently, can produce great profit for both the feedstock suppliers as well as the biomass plants.

AST also has a patented process to break down wood chips to hemicelluloses, celluloses, and lignin. The advantage in this process is that all the fractions are collected separately and utilized separately to make this process profitable.