View source for United States Patent 4,424,275 (RCTA)

(Homework 1)

=== Logistics ===

* Patent 4,424,275
* Continuous Process for Producing N-Butanol Employing Anaerobic Fermentation
** Issued: Jan. 3, 1984 (Filed: Aug. 3, 1981)
* Inventor: Sidney Levy

=== The Invention ===

From its inception, the fermentation of n-butanol from carbohydrate-containing substrate was hampered by several problems, the largest of which was the maximum n-butanol concentration of 2.5% in the fermentation broth, at which point it became toxic to the butanol-producing bacteria. The aims of this invention were to address these shortcomings in the old batch-reactor processes as well as introduce a continuous process for the production of solvents by anaerobic (oxygen-free) fermentation of substrates that contained sugars. The invention is both a process that allows for the continuous production of solvents and their extraction as well as an apparatus for conducting this process. It allows for the continuous production of n-butanol using various substrates and extraction solvents while achieving higher n-butanol concentrations and reusing the extraction solvents. 

<p>I found this patent interesting because butanol has many advantages over ethanol as an alternative, biologically-based fuel source and because I have worked in refining. It will be interesting to explore other inventions, including bacteria cultures and devices, and to see how this technology is being employed in several pilot plants. I found the patent while searching Google Patents: [http://www.google.com/patents]. Google Patents includes the patent overview and documentation: [http://www.google.com/patents/about?id=aKY0AAAAEBAJ]. The drawings are particularly interesting: [http://www.google.com/patents?id=aKY0AAAAEBAJ&printsec=drawing&zoom=4#v=onepage&q&f=false].</p>

[[User:Rabot|Rabot]] 23:23, 23 January 2011 (EST)