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US 12,686,879 B2Granted
Process for the preparation of a sugar product and a fermentation product
AssigneeVersalis S.P.A.
InventorsMaaike Appeldoorn, Bertus Noordam
Life of this patent
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Abstract
There is a process for the preparation of a sugar product from cellulosic material and a process for the preparation of a fermentation product from cellulosic material.
Claims13
Process for the preparation of a sugar product from cellulosic material, comprising the following steps:
- a) enzymatic hydrolysis of the cellulosic material using an enzyme composition to obtain the sugar product, wherein oxygen is added to maintain an oxygen concentration during enzymatic hydrolysis of
- i. 0.0002-0.002 mol O2/m3 when the reactor stirrer speed is 100 rpm;
- ii. 0.002-0.016 mol O2/m3 when the reactor stirrer speed is 120 rpm;
- iii. 0.016-0.047 mol O2/m3 when the reactor stirrer speed is 140 rpm;
- so that xylonic acid is formed in an amount of 500 to 1100 μmol xylonic acid/kg xylan in the cellulosic material per hour, and
- b) recovery of the sugar product.
3 more elements
Process for the preparation of a fermentation product from cellulosic material, comprising the following steps:
- a) enzymatic hydrolysis of the cellulosic material using an enzyme composition to obtain a sugar product, wherein oxygen is added to maintain an oxygen concentration during enzymatic hydrolysis of
- i. 0.0002-0.002 mol O2/m3 when the reactor stirrer speed is 100 rpm;
- ii. 0.002-0.016 mol O2/m3 when the reactor stirrer speed is 120 rpm;
- iii. 0.016-0.047 mol O2/m3 when the reactor stirrer speed is 140 rpm;
- so that the xylonic acid is formed in an amount of 500 to 1100 μmol xylonic acid/kg xylan in the cellulosic material per hour,
- b) fermentation of the hydrolysed cellulosic material to produce a fermentation product, and
- c) recovery of the fermentation product.
4 more elements
Dependencies are inferred from the claim text.