La respuesta que te da María Luisa es correcta, pero me parece que en la industria petrolera es más frecuente esta opción.

Buena suerte.
Manuel
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FEEDSTOCK: Material used in a processing plant.
http://www.anson.co.uk/oilfield_glossary.html

Feedstock
Raw material for a processing unit
http://www.shellchemicals.com/glossary/1,1098,1159,00.html


Feedstock
The source of starting material for a chemical reaction, ideally from a renewable resource rather than a rapidly depleting one, or from the “waste” of another process.
<http://www.chemistry.org/portal/a/c/s/1/acsdisplay.html?DOC=...



feedstock
A feedstock is a substance used as a raw material in an industrial process. Examples of petrochemical feedstocks are ethylene, propylene, butadiene, benzene, toluene, xylene, and naphthalene.
Feedstock is the raw material from fermentation process with cells.
See also : Protein purification, biofuels.
http://www.answers.com/topic/feedstock


Feedstock: Any material that can be converted to another form of fuel or energy product.
http://www.oregon.gov/ENERGY/RENEW/glossary.shtml



Carga de Alimentación (Feedstock)
Materia prima para una unidad de proceso.
http://www.imp.mx/petroleo/glosario/c.htm

Carga de Alimentación (Feedstock)
Materia prima para una unidad de proceso.
http://www.colparmex.org/Revista/Art4/22.pdf


Carga de Alimentación (Feedstock)
Materia prima para una unidad de proceso.
http://www.sistemasindustriales.com/info-petroleo/glosario-t...


http://esl.proz.com/kudoz/793928