Stearic Acid → 18-Pentatriacontanone

HRID 1672078Notes

Reaction equation

HRID 1672078 reaction equation
[C:1]([OH:20])(=O)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18]>O=[Mn]=O>[CH3:17][CH2:16][CH2:15][CH2:14][CH2:13][CH2:12][CH2:11][CH2:10][CH2:9][CH2:8][CH2:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2][CH2:1][C:1]([CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])=[O:20]

Participants

3

Reactant 1

HCID 5281Stearic Acid

Product 1

HCID 1044018-Pentatriacontanone

Reagents, catalysts & solvents 1

HCID 14801Manganese dioxideCatalyst

Procedure

A mixture of plant oils (linseed, soybean, and rapeseed oils) was pretreated by hydrolysis and distillation to obtain fatty acid fractions according to carbon numbers. The C18 acid fraction thus obtained was used as the feed, the fraction being diluted with a paraffinic diesel fuel of biological origin. C18 acid content of the feedstock thus obtained was 31%, by weight. Double bonds of the feedstock were selectively prehydrogenated, and the stearic acid was continuously ketonised at atmospheric pressure, in a tubular reactor using a MnO2 catalyst. Temperature of the reactor was 370° C., the WHSV of total feed being 3 l/h. 22% by weight of 18-pentatriacontanone, or stearone, in a diluent was obtained as the ketonisation product.

Workup

  1. customwas 370° C.

Sources & evidence

ORD record
ord-b572a8e012fc4956b1931bf12f6a43d4
Source dataset
uspto-grants-2011_08
Patent number
US07998339B2

Reaction notes

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