Renewable chemical production engaging metathesis and microbial oxidation

A process for producing 1-decene and renewable carboxylic diacids from a C6-C22 fatty acid ester containing feedstock, the process comprising:

• a) providing the C6-C22 fatty acid ester containing feedstock, wherein the feedstock contains at least one unsaturated fatty acid ester;
• b) subjecting the feedstock to metathesis reaction conditions in a presence of (1) an alkene selected from the group consisting of a C2 alkene, a C3 alkene, a C4 alkene and a combination thereof, and (2) a metathesis catalyst, to obtain metathesis products containing renewable alkenes and fatty acid esters;
• c) recovering C10 alkenes, containing 1-decene from the metathesis products;
• d) subjecting a part of the metathesis products including the fatty acid esters to a pretreatment, wherein the pretreatment includes producing fatty acids from the fatty acid esters, and subjecting the fatty acids to microbial oxidation in a presence of genetically engineered microorganisms cultured in a liquid medium containing a carbon source and other nutrients, to yield a plurality of renewable diacids each having a carbon number from C10 to C15 in a fermentation broth;
• and
• e) recovering the plurality of renewable diacids from the fermentation broth.