Low sulfur tall oil fatty acid

Abstract

The invention relates to tall oil fatty acid compositions having low sulfur content, as well as methods of using and making the same.

Description

[0001]The present invention is related to, and claims the benefit of 119(e) priority to U.S. provisional patent application Ser. No. 60 / 708,425; entitled “Low Sulfur Tall Oil Fatty Acid”, which was filed on Aug. 15, 2005, and is hereby incorporated, in its entirety, herein by reference.FIELD OF THE INVENTION[0002]The invention relates to tall oil fatty acid compositions having low sulfur content, as well as methods of using and making the same.BACKGROUND OF THE INVENTION[0003]Economic and environmental considerations are forcing great market demand for renewable resources of raw materials, such as those utilized in the transportation industry. Examples include the fuel and fuel package market. As standards increasingly require sulfur content within fuels to be reduced, fuel packages and fuel additives must also coincide with such regulations. Therefore, there is a great need for fuels, fuel packages, and fuel additives to have low sulfur content therein.[0004]Tall oil products such ...

AI Technical Summary

Benefits of technology

The present invention relates to a method for reducing the sulfur content of a fatty acid-containing composition, as well as fatty acid-containing compositions with low sulfur content. The invention is based on the discovery of a composition that is low cost and environmentally friendly, and can be used as a fuel, fuel package, and fuel additive. The composition is made from biomass and has low sulfur content and low temperature stability. The invention also provides methods for making and using the fatty acid-containing compositions. Overall, the invention addresses the need for low sulfur content in fuels, fuel packages, and fuel additives to comply with new regulations and to maintain the lifespan of technologies that require low sulfur content.

Problems solved by technology

Further refinement through fractional distillation of the CTO generally concentrates the sulfur species into specific product streams (pitch, rosin, and heads); however it does not eliminate the sulfur species from TOFA.

Until now, tall oil fatty acid was seen in the art as having an undesirable level of sulfur content therein to be efficiently utilized in, or as, environmentally-friendly fuels, fuel packages, and fuel additives, especially since the inception of new laws restricting environmentally unfriendly emissions from the automobile industry.

Otherwise, the presence of such traditional levels of sulfur may “poison” such technology, substantially reducing the lifespan of this technology; and thus, being economically inefficient.

In addition, high sulfur content in tall oil products, such as TOFA, prohibits the downstream conversion of such products into useful value-added chemistries.

Another example is the hydrogenation of dimer acids as well as Monomer (CAS Registry Number 68955-98-6) Conventional tall oil products contain so much sulfur that hydrogenation catalysts are contaminated by the these sulfur containing species, thus “killing” or “poisoning” the catalyst and making the conversion of such conventional tall oil products very economically inefficient and undesirable.

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