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Glycerin works Plant: The process of this glycerin line is distilling the soap producing waste water and by-product of methyl fat acid in oil & fat lactide reaction, and then getting the glycerin.
The following are the process:
• Eliminate organic soil through chemical treatment and sedimentation filter;
• Evaporate moisture, recover sodium chloride in waste solution, and increase the glycerin density;
• Refine the glycerin with distillation and ion exchange.
Specification of raw material :
- |
Quality program |
Unit |
Quality spec. |
Waster solution |
Glycerin
|
%
|
≥7
|
|
Free alkali calculated by Na2O |
%
|
≥0.2
|
|
Fat acid
|
%
|
≥0.15
|
|
Fat acid oxide
|
%
|
≥0.5
|
Methyl fat acid by-product |
Glycerin |
%
|
≥7
|
|
PH
|
%
|
Undetermined
|
Chlorhydric acid |
HCl |
% |
≥30 |
Ferric trioxide |
FeCl |
% |
≥95 |
Liquid caustic alkali |
Caustic soda
|
%
|
≥30
|
|
Sodasalt
|
% |
≤1.0
|
|
Sodium chloride
|
% |
≤5.0
|
|
Bengala
|
%
|
≤0.01
|
Solid caustic alkali |
Caustic soda
|
%
|
≥98.0
|
|
Sodasalt
|
%
|
≤1.7
|
|
Sodium chloride
|
%
|
≤0.25
|
|
Bengala
|
%
|
≤0.01
|
|
Color
|
-
|
White mainly with bit pale
|
Activated charcoal |
Decolor ability
(for 0.15% indicator)
|
Ml %
|
≥16
|
|
Ash
|
-
|
-
|
|
(Fe3+ ) Malysite
|
%
|
≤8
|
|
(Cl - ) Chloride
|
%
|
≤0.08
|
|
(SO42- ) Sulfate
|
%
|
≤0.05
|
|
(Pb2+ ) Heavy metal
|
%
|
0.10
|
|
pH value
|
%
|
<0.005
|
|
Moisture
|
%
|
Neutral ≤5
|
Anion exchange resin 717 |
Exchange equivalent
|
mg equivalent/g
|
≥3
|
|
Graininess
|
-
|
16-50 mesh over 95%
|
|
Moisture
|
-
|
40-50
|
Kation exchange resin 732 |
Exchange equivalent
|
mg equivalent/g |
≥4.5 |
|
Graininess
|
-
|
16-50 mesh over 95% |
|
Moisture
|
-
|
46-52
|
Product quality parameters:
Spec. |
Analytical pure |
Chemically pure |
Special |
Pharmaceutic |
Industrial |
Shade |
not deeper the No.15 according to GB605-77 |
not deeper the No.30 according to GB605-77 |
not deeper than 0.8ml standard iron trichloride solution |
not deeper than 0.2ml standard potassium dichromate solution |
not deeper than 2.0ml mixed standard iron trichloride, cobaltous chloride solution |
Transparency |
- |
- |
Transparency |
- |
Transparency |
Aroma |
- |
- |
no odor after heated in boiling water for 10mins |
- |
no odor |
Specific density |
- |
- |
1.2582 |
1.2569 |
1.2491 |
Purity |
98.0% |
97.0% |
99.5% |
98.5% |
95% |
PH |
6.0-7.0 |
6.0-7.0 |
- |
- |
- |
Ash (calculated with sulfate) |
0.001 |
0.005 |
0.02 |
0.001 |
0.05 |
Chloride |
0.0001 |
0.001 |
0.0005 |
0.0015 |
- |
sulfide (calculated with SO4 )
|
0.0005 |
0.001 |
- |
- |
- |
(NH4 )
Ammonium salt |
0.0005 |
0.001 |
None |
- |
- |
( As) Arsenic
|
0.00005 |
0.0002 |
- |
- |
- |
Heavy metal (calculated with Pb)
|
0.0001 |
0.0005 |
- |
0.0002 |
- |
Fat acid |
0.05 |
0.1 |
- |
The consumption for 40g glycerin is no more than 4ml 0.1N NaOH solution. |
- |
Sucrose & glucose |
Qualified |
Qualified |
- |
Qualified |
- |
Reduced silver |
Qualified |
Qualified |
50PPm glucose |
Qualified |
|
Sulfuric acid test |
Qualified |
Qualified |
- |
Qualified |
- |
Sulfate |
- |
- |
- |
0.002 |
- |
Molysite |
- |
- |
- |
0.002 |
- |
pH value |
- |
- |
The consumption for 50g glycerin is no more than 1.2ml 0.1N NaOH solution. |
- |
- |
Saponification value |
- |
- |
The consumption for 1g glycerin is no more than 0.5mg NaOH. |
- |
- |
Non-volatile residue |
- |
- |
0.01 |
- |
- |
|
|
