English to Spanish Law/Patents Chemistry; Chem Sci/Eng

Estoy traduciendo una patente para un proceso de recuperación de un agente de extracción de solventes orgánicos a partir de emulsiones que se forman en circuitos de extracción de solventes. En el arte previo dice:

"When such an extraction process is conducted in a continuous manner, it is common to have a third phase liquid layer of impurities form between the organic and aqueous phases, i.e., at the organic/aqueous interface in the settling tank or region. Such a third phase impurities layer is colloquially referred to as “gunk” or "**crud**" in the hydrometallurgical industry. The "**crud**" layer consists primarily of the organic extraction solvent which contains smaller amounts of aqueous liquid and undissolved particulate material. Such a third phase "**crud**" layer which forms in the settling tank or region is actually a dispersion, e.g., an emulsion or suspension, of the aqueous and particulate matter in an organic matrix or continuous phase.

During continuous liquid-liquid extraction operations, the third phase layer of impurities often accumulates at the organic/aqueous interface. This "**crud**" or “solid-stabilized emulsion” may also collect in other regions of the separation device in addition to the oil-water interface. Accumulation is such that in conventional extraction operations, the settling tank itself must be shut down, dumped and flushed out from time to time in order to prevent the accumulating layer of impurities from eventually interfering with the efficiency of the extraction procedure. **Crud** impedes complete organic solvent-aqueous separation anywhere in the SX process. Shut down of the settling tank or mixer-settler in the extraction process is, of course, economically disadvantageous. Thus, **crud** formation is a persistent problem common to all solvent extraction operations and is considered one of the primary issues and most common complaints. "

Al buscar "crud", encontré mugre como traducción. Las otras traducciones de crud que encontré, no me cuadran. Sedimento de grasa [Simon & Schuster] no me cuadra dentro del contexto porque no se habla de grasa por ningún lado y no se trata de sedimentos. "Impureza" [Beigbeder] no me funciona porque en el resto del texto hablan de "impurities" de manera general y "materia extraña" [Beigbeder] no pareciera ser algo específico. Para gunk, también encontré mugre.

En concreto, necesito encontrar la traducción de "crud" que no coincida con la de "gunk".

Hice una consulta por separado para "gunk".

Muchísimas gracias por adelantado por su ayuda