Acetate → Calcium Acetate

HRID 258176

Reaction equation

HRID 258176 reaction equation
[C:1]([OH:5])(=[O:4])[CH2:2][CH3:3].C=O.[Ca:8].[C:9]([O-:12])(=[O:11])[CH3:10].[CH:13]([O-:15])=[O:14].[C:16]([O-:20])(=[O:19])[CH2:17][CH3:18]>C(O)=O.C(O)(=O)C>[C:1]([O-:5])(=[O:4])[CH3:2].[Ca+2:8].[C:9]([O-:12])(=[O:11])[CH3:10].[CH:13]([O-:15])=[O:14].[Ca+2:8].[CH:16]([O-:20])=[O:19].[C:16]([O-:20])(=[O:19])[CH2:17][CH3:18].[Ca+2:8].[C:1]([O-:5])(=[O:4])[CH2:2][CH3:3]

Participants

11

Reactant 6

HCID 175AcetateHCID 283FormateHCID 712Formaldehyde2×HCID 1032Propionic Acid2×HCID 104745Propionate ionHCID 5460341Calcium

Product 3

HCID 6116Calcium AcetateHCID 10997Calcium formateHCID 19999Calcium propionate

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolvent2×HCID 284Formic AcidSolvent2×

Procedure

Calcium salts, such as calcium acetate, calcium formate or calcium proprionate, are obtained from aqueous liquors derived from the pyrolysis of lignocellulosic biomass containing cellulose, hemicelluloses or starch. The above biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively. This pH adjusted alkaline liquid is then subjected to a further distillation to remove water and volatile organic components and produce at least one of calcium acetate, calcium formate and calcium propionate as solid residue.

Workup

  1. customto obtain a crude product
  2. additioncontaining an aqueous phase
  3. customThe product obtained, preferably as the aqueous phase
  4. distillationis then distilled
  5. customto produce a distillate
  6. additioncontaining at least one acid
  7. distillationis then subjected to a further distillation
  8. customto remove water and volatile organic components

Sources & evidence

ORD record
ord-16b1ba1558904565bf5ed4916f00085d
Source dataset
uspto-grants-1993_11
Patent number
US05264623

Linked notes

Loading…