CN101058528A - Glycerol separation method - Google Patents
Glycerol separation method Download PDFInfo
- Publication number
- CN101058528A CN101058528A CN 200710023046 CN200710023046A CN101058528A CN 101058528 A CN101058528 A CN 101058528A CN 200710023046 CN200710023046 CN 200710023046 CN 200710023046 A CN200710023046 A CN 200710023046A CN 101058528 A CN101058528 A CN 101058528A
- Authority
- CN
- China
- Prior art keywords
- glycerine
- glycerin
- added
- purification
- waste water
- 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.)
- Pending
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000000926 separation method Methods 0.000 title claims abstract description 6
- 235000011187 glycerol Nutrition 0.000 claims abstract description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 9
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 8
- 150000004702 methyl esters Chemical class 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 230000018044 dehydration Effects 0.000 claims abstract description 5
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims abstract description 5
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 239000004519 grease Substances 0.000 claims abstract description 4
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 238000004821 distillation Methods 0.000 claims abstract description 3
- 238000000746 purification Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 230000003301 hydrolyzing effect Effects 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 208000005156 Dehydration Diseases 0.000 abstract 2
- 238000010306 acid treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a separation method of glycerin, methyl ester and glycerin are produced by the reaction of grease and methanol, methyl ester is separated and purified from the glycerin mixture left after distillation, hydrochloric acid is sequentially added into the mixture to neutralize free alkali, ferric trichloride is added to degum, sodium hydroxide is added to neutralize acidity and remove excessive ferric trichloride, soda ash is added to purify waste water, evaporation, dehydration and concentration are carried out to salt out to obtain crude glycerin, and crude glycerin with the purity of 80% is obtained after acid treatment, degumming, alkali treatment and dehydration treatment.
Description
Technical field
The present invention relates to a kind of biodiesel technology, especially the separation method of glycerine.
Background technology
In the present greasy transformation technology, grease and methyl alcohol carry out transesterification reaction, generate methyl esters and glycerine, glycerine is trivalent alcohol, has the general chemical property of ternary alcohols material, produces in the diesel oil at the production biology, there are a large amount of waste water to produce, contain useful matteies such as glycerine in the waste water, directly discharging pollutes the environment, and the waste resource.
Summary of the invention
The invention provides a kind of separation method of glycerine.
For achieving the above object, technical scheme of the present invention is:
A kind of separation method of glycerine, methyl esters and glycerine by grease and methyl alcohol reaction generation, methyl esters is purified through separating in the remaining glycerol mixture of distillation, it is characterized in that mixture at first added in the hydrochloric acid and free alkali, add that iron trichloride comes unstuck, adds in the sodium hydroxide and acid and remove the iron trichloride of surplus, add soda ash again and carry out purification of waste water, and then carry out dehydration by evaporation and concentrate, make to salt out to obtain raw glycerine.
Like this through peracid treatment, come unstuck, after the alkaline purification and obtain the raw glycerine of purity 80% after the processed.
Embodiment
In concrete the enforcement, pH value is controlled between 8～9, can avoids glycerine evaporation and salt knot like this.
Purification of waste water also can be adopted the hydrolytic purification method, precipitates with milk of lime earlier, comes unstuck with iron trichloride then, neutralizes with soda ash again.
The dehydration by evaporation process can be selected vacuum-evaporator, centor circling evaporator, basket evaporator etc. according to different situations and output.
Claims (3)
1. the separation method of a glycerine, methyl esters and glycerine by grease and methyl alcohol reaction generation, methyl esters is purified through separating in the remaining glycerol mixture of distillation, it is characterized in that mixture at first added in the hydrochloric acid and free alkali, add that iron trichloride comes unstuck, adds in the sodium hydroxide and acid and remove the iron trichloride of surplus, add soda ash again and carry out purification of waste water, and then carry out dehydration by evaporation and concentrate, make to salt out to obtain raw glycerine.
2. according to claim 1, it is characterized in that carrying out in the alkaline purification process pH value being controlled between 8～9.
3. according to claim 1, it is characterized in that purification of waste water also can adopt the hydrolytic purification method, precipitate with milk of lime earlier, come unstuck with iron trichloride then, neutralize with soda ash again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710023046 CN101058528A (en) | 2007-05-30 | 2007-05-30 | Glycerol separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710023046 CN101058528A (en) | 2007-05-30 | 2007-05-30 | Glycerol separation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101058528A true CN101058528A (en) | 2007-10-24 |
Family
ID=38864854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710023046 Pending CN101058528A (en) | 2007-05-30 | 2007-05-30 | Glycerol separation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101058528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262106A (en) * | 2014-10-16 | 2015-01-07 | 佛山市天晟隆油脂化工有限公司 | Glycerine refining method |
| CN109734213A (en) * | 2019-02-26 | 2019-05-10 | 深圳市沃尔热缩有限公司 | A kind of the separating treatment system and processing method of glycerol and water |
| CN114773155A (en) * | 2022-04-27 | 2022-07-22 | 宁波杰森绿色能源科技有限公司 | Process for separating glycerin from biodiesel byproduct |
-
2007
- 2007-05-30 CN CN 200710023046 patent/CN101058528A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104262106A (en) * | 2014-10-16 | 2015-01-07 | 佛山市天晟隆油脂化工有限公司 | Glycerine refining method |
| CN109734213A (en) * | 2019-02-26 | 2019-05-10 | 深圳市沃尔热缩有限公司 | A kind of the separating treatment system and processing method of glycerol and water |
| CN109734213B (en) * | 2019-02-26 | 2024-03-26 | 深圳市沃尔热缩有限公司 | Separation treatment system and treatment method for glycerin and water |
| CN114773155A (en) * | 2022-04-27 | 2022-07-22 | 宁波杰森绿色能源科技有限公司 | Process for separating glycerin from biodiesel byproduct |
| CN114773155B (en) * | 2022-04-27 | 2024-01-12 | 宁波杰森绿色能源科技有限公司 | Process for separating glycerin from biodiesel byproduct |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071024 |