Systems and methods for formaldehyde control
AssigneeKerry Luxembourg S.à.r.l.
InventorsBarry A. FREEL, Satya T. JUJJURI, Douglas A. CLARKE
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Abstract
Methods are provided to use water-free quench liquids to obtain pyrolytic liquid products with reduced formaldehyde content. Products include liquids with improved hydroxyacetaldehyde content.
Claims20
A method for producing a low-formaldehyde product having a ratio of no more than 150 ppm formaldehyde per 1° BX of the low-formaldehyde product, comprising:
- i) pyrolyzing biomass to form gaseous pyrolysis products;
- ii) condensing a portion of the gaseous pyrolysis products to form the low-formaldehyde product, comprising:
- contacting the gaseous pyrolysis products with a nonaqueous coolant;
- and
- iii) separating at least a portion of the low-formaldehyde product from the nonaqueous coolant.
A method for producing a low-formaldehyde liquid product having a ratio of no more than 150 ppm formaldehyde per 1° BX of the low-formaldehyde liquid product, comprising:
- i) pyrolyzing one or more biomass components to form gaseous pyrolysis products;
- ii) introducing the gaseous pyrolysis products into a separation unit;
- iii) recirculated a liquid coolant having a water solubility at 25° C. of less than 100 ppm water from an outlet of the separation unit to an inlet of the separation unit;
- and
- iv) recovering the liquid product comprising at least 50 wt. % of the gaseous pyrolysis products from the separation unit.
A method for producing a low-formaldehyde liquid product having a ratio of no more than 150 ppm formaldehyde per 1° BX of the low-formaldehyde liquid product, comprising:
- i) pyrolyzing biomass in a biomass-containing stream to form a gaseous pyrolytic stream comprising water;
- ii) introducing the gaseous pyrolytic stream into a separation unit;
- iii) recirculating a substantially water-free liquid coolant stream from an outlet of the separation unit to an inlet of the separation unit;
- and
- iv) recovering substantially all of the water present in the gaseous pyrolytic stream from the separation unit in a first stream consisting of the liquid product and a second stream consisting of a non-condensed portion of the gaseous pyrolytic stream.
Dependencies are inferred from the claim text.