Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound
Reexamination Certificate
2011-08-16
2011-08-16
Manoharan, Virginia (Department: 1771)
Distillation: processes, separatory
Distilling to separate or remove only water
From organic compound
C159S006200, C159S049000, C159S901000, C159SDIG016, C202S176000, C202S177000, C202S205000, C202S236000, C203S021000, C203S089000, C203S094000, C203S098000, C203SDIG016, C568S852000, C568S869000
Reexamination Certificate
active
07998317
ABSTRACT:
A glycerol preparation method for preparation of medical grade glycerol from a by-product of a bio-diesel process includes a first stage phosphoric acid chemical reaction process and a posterior by-product centrifugal separation process to have the phosphoric acid chemical reaction by-product be separated into free fatty acid, potassium phosphoric acid, and a crude glycerol and methanol mixture. The crude glycerol and methanol mixture is further processed through a first step of thin film evaporation process where methanol is reclaimed, a second step of thin film evaporation process where the mixture is dehydrated, a third step of molecular distillation process where an industrial grade glycerol of purity over 95% is extracted, and a fourth step of molecular distillation process where a medical grade glycerol of purity in exceed of 99.75% that meets USP/BP standards is extracted.
REFERENCES:
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patent: 2741638 (1956-04-01), Blair et al.
patent: 4655879 (1987-04-01), Brockmann et al.
patent: 7709667 (2010-05-01), Kase et al.
Manoharan Virginia
Shih Chun-Ming
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