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Method of Removing Nitrogen Compounds from Bio Crude

IP.com Disclosure Number: IPCOM000241916D
Publication Date: 2015-Jun-08
Document File: 2 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Related People

Baker Hughes Incorporated: OWNER

Abstract

A new composition for removal of nitrogen compounds such as, but not limited to, low molecular weight amines from bio crude oil using mineral or organic acids has been identified.

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Method of Removing Nitrogen Compounds from Bio Crude

A new composition for removal of nitrogen compounds such as, but not limited to, low molecular weight amines from bio crude oil using mineral or organic acids has been identified.

Bio crude is oil generated by processing any renewable biomass source such as algae, plants, wood chips and paper or animal products into liquid hydrocarbons suitable for use as a refinery feedstock.  Nitrogen compounds are present in these oils and may distill into the gasoline, jet or diesel fuel products during refinery processing where they create color and residue formation. The color and residue can prevent the fuels from meeting industry quality standards. Amines in the bio crude may also cause amine hydrochlorides to form in the refinery crude distillation tower which cause accelerated corrosion of the unit. Hydrotreatment is a common method of removing the nitrogen compounds but their removal requires more severe and expensive process conditions than typically used to remove olefins and sulfur compounds from the same fuels. The presence of these nitrogen compounds crude make bio crude a problematic feedstock and thus their removal improves the value of the bio crude to a refinery.

The new method found to reduce nitrogen content of the bio crude includes a water wash of the bio crude/ acid composition. The nitrogen derivatives are easily extracted from the oil into a water phase during the extraction. The water extraction may be accomplished as a part of the bio crude production itself or may be used after the bio crude has been formed. Any mineral or organic acid capable of reducing the pH of the water extract to between 1 and 7 after contact with the bio crude can be used in the composition....