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Low water biomass-derived pyrolysis oil and processes for preparing the same

a biomass-derived pyrolysis oil and low water technology, applied in the petroleum industry, azeotropic distillation, liquid carbonaceous fuels, etc., can solve the problems of increasing the storage instability of oil and the inability to distill derived pyrolysis oil

Inactive Publication Date: 2011-06-23
UOP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]Processes are provided for reducing water in a water-containing biomass-derived pyrolysis oil. In accordance with one exemplary embodiment, a process for reducing water comprises distilling the water-containing biomass-derived pyrolysis oil in the presence of an azeotrope-forming liquid to form an azeotrope and removing the azeotrope.

Problems solved by technology

Unfortunately, the high water content of the biomass-derived pyrolysis oil increases the storage instability of the oil.
As-produced biomass-derived pyrolysis oil cannot be simply distilled to completely remove water, as phase separation and / or solids formation result as volatiles are removed.

Method used

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  • Low water biomass-derived pyrolysis oil and processes for preparing the same

Examples

Experimental program
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example

[0030]A mixture of biomass-derived pyrolysis oil (123 g, starting water content about 33 wt %), toluene (160 g) and ethanol (246 g) was placed in a rotary evaporator and heated to 90° C. Volatiles were collected and both overhead vapors (348 g) and distillation apparatus remnants (185 g) (i.e., low water biomass-derived pyrolysis oil) were characterized. The distillate composition (excluding water) was >99+% toluene and ethanol (as determined by gas chromatography) with little or no biomass-derived pyrolysis oil mass loss to overhead vapors. 96% of the toluene and 63% of ethanol was recovered in the distillate. The resultant bottoms product (i.e., distillation apparatus remnants) was low water biomass-derived pyrolysis oil having about 6.7 wt % water. Thus, 185 g of low water biomass-derived pyrolysis oil with 6.7 wt % water=12.4 g of water. The starting biomass-derived pyrolysis oil (132 g, 33% water) had 43.6 g water. Thus, 43.6-12.4 / 43.6=71.6% of the water was removed from the st...

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Abstract

Low water-containing biomass-derived pyrolysis oils and processes for preparing them are provided. Water-containing biomass-derived pyrolysis oil is distilled in the presence of an azeotrope-forming liquid to form an azeotrope. The azeotrope is removed at or above the boiling point of the azeotrope and low water biomass-derived pyrolysis oil is obtained.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is related to co-pending U.S. application Ser. No. ______ entitled “LOW METAL, LOW WATER BIOMASS-DERIVED PYROLYSIS OILS AND METHODS FOR PRODUCING THE SAME”, and U.S. application Ser. No. ______ entitled “METHODS FOR REGENERATING ACIDIC ION-EXCHANGE RESINS AND REUSING REGENERANTS IN SUCH METHODS”, filed concurrently herewith on ______, and which are incorporated by reference herein in their entirety.FIELD OF THE INVENTION[0002]The present invention generally relates to biofuels and processes for preparing biofuels, and more particularly relates to low water biomass-derived pyrolysis oil and processes for producing the same.DESCRIPTION OF RELATED ART[0003]Fast pyrolysis is a process during which organic biomass materials, such as wood waste, agricultural waste, etc., are rapidly heated to about 450° C. to about 600° C. in the absence of air using a process reactor. Under these conditions, organic vapors, pyrolysis gases and...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/18
CPCC10L1/02B01D3/36
Inventor BRANDVOLD, TIMOTHY A.FREY, STANLEY J.
Owner UOP LLC
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