CN105130753A - Glycerin distillation method - Google Patents
Glycerin distillation method Download PDFInfo
- Publication number
- CN105130753A CN105130753A CN201510473137.3A CN201510473137A CN105130753A CN 105130753 A CN105130753 A CN 105130753A CN 201510473137 A CN201510473137 A CN 201510473137A CN 105130753 A CN105130753 A CN 105130753A
- Authority
- CN
- China
- Prior art keywords
- glycerin
- distillation method
- distillation
- glycerine
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a glycerin distillation method. The method comprises the following steps: (1) adding caustic soda into glycerin and adjusting the pH to 8-10; (2) adding the glycerin obtained in the step (1) into a distillation boiler to carrying out distillation at a temperature of 225 to 230 DEG C under a vacuum degree of 0.09 to 0.092 MPa. Compared with the conventional distillation method, the provided glycerin distillation method can reduce energy consumption and ester content of finished products.
Description
Technical field
The present invention relates to a kind of glycerol distillation method.
Background technology
Glycerine is without the sweet clear and bright thick liquid of color and taste.Odorless.There is warm sweet taste.Be commonly called as glycerine, moisture can be absorbed from air, also can absorbing hydrogen sulphide, prussic acid and sulfurous gas.High-purity glycerol is a kind of very important industrial raw material, is widely used in the industry such as food, medicine, makeup and tobacco.Commercially available raw glycerine is the by product from soapmaking or lipid acid mostly, and that does not avoid contains various impurity, therefore needs to carry out decolouring removal of impurities, to improve quality.Because glycerine has the higher height that boils, adopt conventional distilation that energy consumption can be made very high.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of glycerol distillation method.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of glycerol distillation method, comprises the steps:
(1) in glycerine, add caustic soda, regulate pH to 8-10;
(2) glycerine of step (1) is pumped into still pot to distill, distillation condition is: vacuum tightness is 0.09-0.092MPa, temperature is 225-230 DEG C.
Compared with existing distillation method, the ester class in the capable of reducing energy consumption and finished product of the present invention.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1
(1) in commercially available raw glycerine, add caustic soda, regulate pH to 8-10;
(2) vacuum pump of still pot is opened, after to still pot vacuum tightness to 0.09MPa, the raw glycerine of step (1) is pumped into still pot, then raw glycerine is heated to 225-230 DEG C, keep vacuum tightness to 0.09-0.092MPa, open still pot bleeder valve, access water white glycerine (boiling point 290.8 DEG C).
Before it is distilled, keep the basicity that raw glycerine is suitable, can reduce the ester class in finished product, improve qualities of glycerin, if alkali number is excessive, foam can be made to increase, and easily make glycerol polymerization, therefore, the pH of raw glycerine should control at 8-10.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a glycerol distillation method, comprises the steps:
(1) in glycerine, add caustic soda, regulate pH to 8-10;
(2) glycerine of step (1) is pumped into still pot to distill, distillation condition is: vacuum tightness is 0.09-0.092MPa, temperature is 225-230 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473137.3A CN105130753A (en) | 2015-08-05 | 2015-08-05 | Glycerin distillation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473137.3A CN105130753A (en) | 2015-08-05 | 2015-08-05 | Glycerin distillation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105130753A true CN105130753A (en) | 2015-12-09 |
Family
ID=54716395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510473137.3A Pending CN105130753A (en) | 2015-08-05 | 2015-08-05 | Glycerin distillation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105130753A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020785A (en) * | 2018-07-25 | 2018-12-18 | 清远市福泰甘油精制有限公司 | The glycerol generated during a kind of pair of production of biodiesel carries out refining method |
| CN109134199A (en) * | 2018-07-25 | 2019-01-04 | 清远市福泰甘油精制有限公司 | A kind of preparation method of food grade glycerin |
-
2015
- 2015-08-05 CN CN201510473137.3A patent/CN105130753A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020785A (en) * | 2018-07-25 | 2018-12-18 | 清远市福泰甘油精制有限公司 | The glycerol generated during a kind of pair of production of biodiesel carries out refining method |
| CN109134199A (en) * | 2018-07-25 | 2019-01-04 | 清远市福泰甘油精制有限公司 | A kind of preparation method of food grade glycerin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151209 |