LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Lactic Acid: Fermented Whey, Lime, Oxalic Acid and Alcohol (Louradour, US Dispensatory 1907)
Whey left warm turns sour with lactic acid. Louradour's way to get the acid out: boil the whey down, take the acid up as calcium lactate with lime, then free it again with oxalic acid, which carries the lime away as an insoluble salt. A last wash in alcohol leaves the milk sugar and salts behind.
Source: The Dispensatory of the United States of America (1907), Acidum Lacticum. This is pharmacopoeial lactic acid; we use it as food-grade, as ruled. The Dispensatory gives the temperature and the order of work but no amounts or times; those are stated as not given. Vessels, filter and still are ours. Picture drawn by Youblob.
Miðlungs
1 week
Leiðbeiningar
1
1
Sour the whey at 21-27 °C
Sour the whey at 21-27 °C
Keep whey between 21.1 °C (70 °F) and 26.6 °C (80 °F) until it is charged with lactic acid. Not given: how long.
Efni fyrir þetta skref:
Mysa1 as requiredNauðsynleg verkfæri:
Glerílát
Rannsóknastofuhitamælir2
2
Boil down to a third, then add lime
Boil down to a third, then add lime
Evaporate it to one third of its bulk, decant and filter. Saturate it with milk of lime (slaked lime stirred in water). The acid becomes calcium lactate and stays dissolved; a precipitate, mostly calcium phosphate, falls. Filter again. Not given: how much lime.
Efni fyrir þetta skref:
Kalsíumhýdroxíð (slökkt kalk)1 as required
Vatn1 as requiredNauðsynleg verkfæri:
Uppgufunarskál
Hitaplata
Síupappír3
3
Free the acid with oxalic acid
Free the acid with oxalic acid
Add oxalic acid: the lime falls as calcium oxalate and the lactic acid is set free. Filter a third time. The solution still holds milk sugar and some salts. Oxalic acid is poisonous if swallowed: gloves. Not given: how much.
Efni fyrir þetta skref:
Oxalsýrutvíhýdrat1 as requiredNauðsynleg verkfæri:
GlerílátSíupappír
Nítrílhanskar4
4
Purify with alcohol and distil it off
Purify with alcohol and distil it off
Concentrate to a syrup and treat it with alcohol, which dissolves the acid and throws down the milk sugar and salts. Filter, then distil off the alcohol: pure lactic acid remains.
Nauðsynleg verkfæri:
Etanól - rannsóknargráða, 95 %UppgufunarskálSíupappír
Kúlukolba
EimsvalaspírallHitaplataEfni
4- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
- 1 as requiredStaðgengill
Þessi teikning býr til
Tengd Blueprint
Þessi blueprint deila þekkingu — tækni, efni eða meginreglur
CC0 opinbert ríki
Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.
Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.