US 12,234,410 B2
Systems and methods for formaldehyde control
Barry A. Freel, Ottawa (CA); Satya T. Jujjuri, Wilmington, DE (US); and Douglas A. Clarke, Ottawa (CA)
Assigned to Kerry Group Services International Limited, Co. Kerry (IE)
Filed by KERRY GROUP SERVICES INTERNATIONAL LIMITED, Tralee (IE)
Filed on Dec. 22, 2020, as Appl. No. 17/130,699.
Claims priority of provisional application 62/952,876, filed on Dec. 23, 2019.
Prior Publication US 2021/0189247 A1, Jun. 24, 2021
Int. Cl. C10B 57/04 (2006.01); C07C 45/51 (2006.01); C07C 47/04 (2006.01); C07C 47/19 (2006.01); C10B 49/22 (2006.01); C10B 53/02 (2006.01); C10K 1/00 (2006.01)
CPC C10B 49/22 (2013.01) [C07C 45/51 (2013.01); C10B 53/02 (2013.01); C10B 57/04 (2013.01); C10K 1/001 (2013.01); C10K 1/002 (2013.01); C07C 47/04 (2013.01); C07C 47/19 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing a low-formaldehyde product having (a) a ratio of no more than 150 ppm formaldehyde per 1° BX of the low-formaldehyde product, and (b) a ratio of between 0.1 wt. % hydroxyacetaldehyde per 1° BX of the low-formaldehyde product and 0.5 wt. % hydroxyacetaldehyde per 1° BX of the low-formaldehyde product, the method comprising:
i) pyrolyzing a biomass solution 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,
wherein the low-formaldehyde product contains hydroxyacetaldehyde and has a ratio of formaldehyde-to-hydroxyacetaldehyde of no more than 0.1 (w/w),
wherein a temperature of the condensing is less than 80° C.,
wherein the nonaqueous coolant is selected from the group consisting of an unsaturated liquid hydrocarbon, a saturated liquid hydrocarbon, hexane, heptane, dodecane, a vegetable oil, a silicone oil, and a combination thereof, and
wherein the biomass solution comprises one or more sugars and/or one or more starches at a BRIX value of 40° BX to 90° BX.