Deacidification
Hot Topic: Deacidification
The importance of lime quality for a successful deacidification:
•In the first step the quantity of double-salt lime Neoanticid is determined and little must/wine is added to prepare a paste.
The rest of must or wine is then added slowly to the paste over a time of 30 minutes while constantly stirring.
•By stirring constantly the carbon dioxide is removed from the liquid, avoiding the risk of decreasing pH-levels due
to carbonic acid.
•The double-salt lime has to have a high speed of reaction to quickly neutralise the acids of the must or wine. If the reaction is too slow, the pH-level drops below 4.5 and the formation of double-salt crystals is not possible any more.
The formation of double-salt crystals occurs only if the pH is
above 4.5. For this purpose, following requirements are critical:
Figure 1 shows the results of a careful quality check. Samples of
Neoanticid 1-3 have a substantial higher speed of reaction
and are therefore considerably better suited for a successful
double-salt deacidification than the lime samples 1-4, which
can only be used for normal deacidification.
Within a minimum period of time the Neoanticid samples 1-3
not only reach the required pH of 4.5, but exceed it by far.
The additional pH-safety-margin guarantees that tartaric and
malic acid are precipitated in equal parts. A lime which is
unfitted causes a worse formation of double-salt, as it leads to
solid solutions of double-salt and calcium tartrate. This reduces
the amount of precipitated malic acid and decreases the
whole range of deacidification.
Reaction speed of different lime qualities
6,5
6
5,5
5
pH-value
Double-salt deacidification with Neoanticid is based on the
fact that a partial quantity of must, which must be calculated,
is almost entirely deacidified. After separation of the crystal
deposit, this treated part is again blended with the nondeacidified part of the must.
4,5
Lime 1
4
Lime 2
Lime 3
3,5
Lime 4
3
Neoanticid 1
Neoanticid 2
2,5
Neoanticid 3
2
Reaction time
Fig. 1
Characteristics of the main procedures of deacidification
Double-salt deacidification with
Neoanticid
Extended double-salt deacidification
with Malicid®
Fine adjustment of acidity
with Kalinat
Recommended above approx.
12 g/L total acidity (TA)
Homogeneous mixture of L-(+)-tartaric acid and special
double-salt lime
Deacidification up to approx.
3 g/L total acidity (TA)
67 g Neoanticid per 100 L must/wine
decrease TA by 1 g/L
Necessary if shifting of acid proportions is required
67 g Kalinat per 100 L must/wine
decrease TA by 1 g/L
Malic and tartaric acid are precipitated in
about equal parts
Any range of deacidification possible
Preserves fruitiness in wine
Higher range of deacidification possible
Independent of tartaric acid concentration
Addition while stirring, leave
sufficient room for foam formation
Mix Neoanticid with little must or wine to a
paste and give it into the deacidification
vessel
Gentle deacidification without shifting the calcium
proportions
Result can be tasted after release
of carbon dioxide
Add calculated partial quantity of total
volume, while constantly stirring
Addition to partial quantity after reaction of Neoanticid
Result can be confirmed by
titration after total precipitation
of tartrate
Adjust addition of liquid to speed of carbon
dioxide release
Look up deacidification-calculator on
www.erbsloeh.com
Acceleration of precipitation by
cooling to <5 °C and addition
of Kali-Contact. Ready to bottle
within a few days
For simple deacidification by precipitating tartaric acid Erbslöh Kalk can be used. To neutralise 1‰ or 1 g/L tartaric acid per 100 L must/wine 67 g
Erbslöh Kalk is required.
Double-salt deacidification with Neoanticid
Determination of required partial quantity of total volume and amount of Neoanticid:
1. Measure total acidity (TA ) of must/wine which has to be deacidified.
2. Define desired level of TA.
3. Look up measured TA in chart (green header).
4. Look up desired TA in the first column.
5. Find required partial quantity (PQ) of total volume and amount of Neoanticid (NA) in the intersection of measured and desired TA.
Table 1:
Total titratable
acid (TA)
10.0
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5,0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
380
TM
–
–
–
–
–
115
145
190
235
265
300
330
355
NA
–
–
–
–
–
0.7
1.0
1.3
1.7
2.0
2.4
2.7
3.1
3.4
TM
–
–
–
–
110
155
200
240
275
310
340
370
395
420
NA
–
–
–
–
0.7
1.0
1.3
1.7
2.0
2.4
2.7
3.1
3.4
3.7
TM
–
–
–
115
170
215
240
280
320
350
385
410
435
460
NA
–
–
–
0.7
1.0
1.3
1.7
2.0
2.4
2.7
3.1
3.4
3.7
4,0
TM
–
–
120
170
220
260
300
335
370
400
425
450
475
500
NA
–
–
0.7
1.0
1.3
1.7
2,0
2.4
2.7
3.1
3.4
3.7
4.0
4.4
535
TM
–
125
180
230
270
320
350
390
415
440
470
495
515
NA
–
0.7
1.0
1.3
1.7
2.0
2.4
2.7
3.1
3.4
3.7
4.0
4.4
4.7
TM
135
190
240
285
325
365
400
430
460
485
510
530
555
575
NA
0.7
1.0
1.3
1.7
2.0
2.4
2.7
3.1
3.4
3.7
4.0
4.4
4.7
5.1
610
TM
200
260
310
340
390
420
460
480
505
530
555
575
595
NA
1.0
1.3
1.7
2.0
2.4
2.7
3.0
3.4
3.7
4.0
4.4
4.7
5.1
5.4
TM
270
315
360
400
435
470
500
525
550
575
595
615
630
650
NA
1.3
1.7
2.0
2.4
2.7
3.0
3.4
3.7
4.0
4.4
4.7
5.1
5.4
5.8
TM
330
380
420
460
500
520
550
575
600
620
640
655
675
690
NA
1.7
2.0
2.3
2.7
3.0
3.3
3.7
4.0
4.4
4.7
5.1
5.4
5.8
6.1
TM
400
445
480
515
545
575
595
620
640
660
680
695
710
725
NA
2.2
2.3
2.7
3.0
3.3
3.7
4.0
4.4
4.7
5.1
5.4
5.8
6.1
6.5
TM
470
510
540
575
600
625
645
670
690
705
720
735
750
765
NA
2.3
2.7
3.0
3.3
3.7
4.0
4.4
4.7
5.1
5.4
5.8
6.1
6.5
6.8
The given values of partial quantity (in litres) and of Neoanticid (in kg) refer to 1000 litres liquid.
Procedure of double-salt deacidification with Neoanticid Extended double-salt deacidification with Neoanticid and Malicid®
1.
2.
Based on the measured an desired
values, find the required amount of
Neoanticid in the chart. Place it in a
sufficiently large vessel and mix it with
little must or wine to a paste.
To this paste, slowly add the required partial
quantity of must/wine given in the chart.
Allow it to run steadily into the vessel over
a time of 30 minutes while constantly stirring.
The pH must not drop under 4.5, therefore
the developing carbon dioxide needs to
be expelled by continuous agitation.
4.
5.
3. In case of extended double-salt deacidification
When the partial quantity is mixed with
the Neoanticid and increased carbon
dioxide formation is not noticed any
more, slowly add the calculated amount
of Malicid. The newly developing carbon
dioxide has to be expelled again by
agitation.
ERBSLÖH Geisenheim AG • 65366 Geisenheim • Tel.: +49 6722 708-0 • www.erbsloeh.com
The crystal precipitation is easily removed
by filtration (earth filter, filter press, or
vacuum-drum filter).
Now add the whole batch to the
deacidified partial quantity.