CN1127576C - Treacle decoloring process - Google Patents
Treacle decoloring process Download PDFInfo
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- CN1127576C CN1127576C CN 01142190 CN01142190A CN1127576C CN 1127576 C CN1127576 C CN 1127576C CN 01142190 CN01142190 CN 01142190 CN 01142190 A CN01142190 A CN 01142190A CN 1127576 C CN1127576 C CN 1127576C
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Abstract
The present invention discloses a mew method for treacle decoloration, which utilizes novel functional macromolecule adsorbing material for treacle decoloration. The functional macromolecule absorbing material utilizes synthetic fibre as the ion exchange fibre of a skeleton. The method of the present invention utilizes the principle of fibre surface absorption, and achieves the purposes of decoloration, absorption and purification. Compared with the general resin ion exchanger at current, the present invention has the advantages of large specific surface area, large exchange capacity, high decoloration efficiency, short regeneration time, long service life, etc. The purification effect of the decoloration by the method of the present invention can be enhanced to 2 to 5% than that of the prior art of a sugar refinery, and the economic efficiency is good. The present invention can not release harmful substances in the application process, and has no pollution to environment. The present invention accords with the industrial development trend of green environmental protection, and can cause the quality of sugar to achieve the standard of GB317-1998 high quality soft white sugar.
Description
The present invention relates to a kind of sugar juice decoloring method, particularly relate to and utilize a kind of new type functional polymer adsorbing material to carry out the method for sugar juice decoloring, described functional high-polymer sorbing material is to be the ion-exchange fiber of skeleton with synthon.
In syrup was produced, calcium salt and colour directly influenced the quality of sugar, thereby the important step of sugar industry and a difficult problem are exactly sugar juice decoloring.China's Closed Circulation in Sugar Production generally adopts the sulphur bleaching process at present, and the disadvantage of this technology is SO
2Not the molecule that destroys coloring matter, but generate unsettled colourless affixture that through the air contact or will develop the color once more, this decolouring technology is temporary transient, unsettled under other oxidizing condition with coloring matter in peace and quiet process; Comparatively Xian Jin technology is to adopt the macropore exchange resin as sorbing material, and this method can reach decolorizing effect preferably, but pigment is adsorbed in the micropore, and unsuitable wash-out be easy to generate resin poison, and the recovery time is long, cost height, liquid waste disposal difficulty.This shows that sugar juice decoloring method of the prior art has the defective that tangible urgent need overcomes.
Ion-exchange fiber is as novel ion-exchange material, and its exchange is carried out at fiber surface, and is completely different with the exchange of the endoporus of ion exchange resin, and it is big to have a specific surface, and exchange velocity takes off soon, easily advantage such as washes, circulating resistance is little.Ion-exchange fiber is used for sugar juice decoloring and has decolorizing efficiency height, recovery time weak point, strong, not easy to change, the low cost and other advantages of syrup of syrup resistance of oxidation.
The invention provides a kind of sugar juice decoloring method, this method comprises the steps: that (1) choose anion-exchange fibre and cation exchange fibre, and wherein anion-exchange fibre is 60: 40 to 80: 20 with the ratio of the consumption of cation exchange fibre; (2) with above-mentioned two kinds of blending in of fibers evenly after, be immersed in the water, be seated in the stagewise ion exchange column first-class end socket step by step; (3) fiber is preheated to 60～75 ℃, feeds syrup; (4) regenerate after moving 30～40 days continuously; (5) carry out affination with 30～55 ℃ water; (6) regenerate with 8～16% the NaCl aqueous solution, regeneration temperature is a room temperature; (7) the softening water desalinization of soil by flooding or leaching.
The anion-exchange fibre that the present invention adopts is prepared by following reactions steps: A, pre-treatment: the basic fiber of polyvinyl alcohol (PVA) was soaked 2～15 minutes in concentration is 2～20% diammonium hydrogen phosphate solution; B, partial carbonization: fiber carries out the high temperature cabonization more than twice, carbonization time 0.5～3.0 hour after will soaking under 130～180 ℃ of temperature; C, acidification reaction: it is in 20～30% the dilute sulphuric acid 2～10 minutes that the product behind the high temperature cabonization is immersed in concentration; D, etherification reaction: the acidifying fiber is put into concentration greater than 85% epoxy chloropropane, and temperature of reaction is 40～75 ℃, is incubated 0.5～3.5 hour; E, amination reaction: with etherificate fiber and trimethylamine solution reaction, 45～75 ℃ of temperature of reaction, the reaction times is 0.5～3.5 hour; F, transition handle: behind amination reaction, feed 10%～20% HCl solution and react 25～30 minutes reaction times in the gained fiber; G, washing: utilizing the tap water flushing, is neutral until pH, obtains anion-exchange fibre.
The cationic ion exchange fiber that the present invention adopts is prepared by following reactions steps: H, pre-treatment: the basic fiber of polyvinyl alcohol (PVA) was soaked 2～15 minutes in concentration is 2～20% diammonium hydrogen phosphate solution; I, partial carbonization: fiber carries out the high temperature cabonization more than twice, carbonization time 0.5～3.0 hour after will soaking under 130～180 ℃ of temperature; J, esterification: add 10～20% vitriolate of tartar in 15% sulfuric acid bath, carry out esterification, the reaction times is 5～25 minutes; K, sulfonation reaction: add 98% vitriol oil in the fiber after the esterification, the reaction times is 5～25 minutes; L, transition handle: the sodium hydroxide with 15～25%, and time transition is 3～30 minutes; M, washing: utilizing the tap water flushing, is neutral until pH, obtains cation exchange fibre.
The inventive method utilizes the principle of fiber surface absorption to reach decolouring, absorption, purification purpose, compare advantages such as specific surface area is big, exchange capacity is big, decolorizing efficiency is high, the recovery time is short, long service life that it has with the at present general decolouring of resin ion-exchanger, purification.Using the inventive method decolours, purification effect than sugar refinery prior art can improve 2～5%, economical efficiency is better, and in application process, can not discharge objectionable impurities, environmental pollution is little, the industrial development trend that meets environmental protection can make the quality of sugar reach GB 317-1998 high-quality caster sugar standard.
Embodiment
Adopt the method for preparing ion-exchange fiber.
2000 gram anion-exchange fibres and 1000 gram cation exchange fibres are mixed, adopt unordered type of feed to be seated in the ion exchange column.The exchange raw material mainly is a syrup stoste, and it is 2.5～8% sulfuric acid and 0.5～5% soda ash that regenerator adopts concentration, with the agent of softening water regenerated from washing.Concrete implementation step is:
1. after stopping logical syrup, just be washed till the peace and quiet transparent inclusion-free of outflow water with tap water;
2. regeneration: to effluent liquid sun post pH=1～2, soak cloudy post pH=9～10 with regenerator
5～30 minutes, positive post 7% sulfuric acid, cloudy post 5%NaOH;
3. washing: with softening water eccysis regenerator, positive post is washed till pH=6, and cloudy post is to pH=
8；
4. exchange: discharge water reinforced exchange, exchange control speed 1: 10.
This test was gone through 10 hours, handled 5 tons of syrups, had obtained effect preferably, and the key technical indexes is as follows:
1. decolorizing efficiency 〉=78%;
2. purification effect improves 〉=4%;
3. calcium salt clearance 〉=0.05%;
4. purity improves 〉=4%;
5. 10 hours working times;
6. 0.3 hour recovery time;
7. Tang quality reaches national GB317-1998 high-quality caster sugar standard.
Claims (3)
1, a kind of sugar juice decoloring method, this method comprise the steps: that (1) choose anion-exchange fibre and cation exchange fibre; Wherein anion-exchange fibre is 60: 40 to 80: 20 with the ratio of the consumption of cation exchange fibre.(2) with above-mentioned two kinds of blending in of fibers evenly after, be immersed in the water, be seated in the stagewise ion exchange column first-class end socket step by step; (3) fiber is preheated to 60～75 ℃, feeds syrup; (4) regenerate after moving 30～40 days continuously; (5) carry out affination with 30～55 ℃ water; (6) regenerate with 8～16% the NaCl aqueous solution, regeneration temperature is a room temperature; (7) the softening water desalinization of soil by flooding or leaching.
2, according to the process of claim 1 wherein that anion-exchange fibre is prepared by following reactions steps: A, pre-treatment: the basic fiber of polyvinyl alcohol (PVA) was soaked 2～15 minutes in concentration is 2～20% diammonium hydrogen phosphate solution; B, partial carbonization: fiber carries out the high temperature cabonization more than twice, carbonization time 0.5～3.0 hour after will soaking under 130～180 ℃ of temperature; C, acidification reaction: it is in 20～30% the dilute sulphuric acid 2～10 minutes that the product behind the high temperature cabonization is immersed in concentration; D, etherification reaction: the acidifying fiber is put into concentration greater than 85% epoxy chloropropane, and temperature of reaction is 40～75 ℃, is incubated 0.5～3.5 hour; E, amination reaction: with etherificate fiber and trimethylamine solution reaction, 45～75 ℃ of temperature of reaction, the reaction times is 0.5～3.5 hour; F, transition handle: behind amination reaction, feed 10%～20% HCl solution and react 25～30 minutes reaction times in the gained fiber; G, washing: utilizing the tap water flushing, is neutral until pH, obtains anion-exchange fibre.
3, according to the process of claim 1 wherein that the cationic ion exchange fiber is prepared by following reactions steps: H, pre-treatment: the basic fiber of polyvinyl alcohol (PVA) was soaked 2～15 minutes in concentration is 2～20% diammonium hydrogen phosphate solution; I, partial carbonization: fiber carries out the high temperature cabonization more than twice, carbonization time 0.5～3.0 hour after will soaking under 130～180 ℃ of temperature; J, esterification: add 10～20% vitriolate of tartar in 15% sulfuric acid bath, carry out esterification, the reaction times is 5～25 minutes; K, sulfonation reaction: add 98% vitriol oil in the fiber after the esterification, the reaction times is 5～25 minutes; L, transition handle: the sodium hydroxide with 15～25%, and time transition is 3～30 minutes; M, washing: utilizing the tap water flushing, is neutral until pH, obtains cation exchange fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142190 CN1127576C (en) | 2001-09-17 | 2001-09-17 | Treacle decoloring process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01142190 CN1127576C (en) | 2001-09-17 | 2001-09-17 | Treacle decoloring process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1336441A CN1336441A (en) | 2002-02-20 |
| CN1127576C true CN1127576C (en) | 2003-11-12 |
Family
ID=4676688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01142190 Expired - Fee Related CN1127576C (en) | 2001-09-17 | 2001-09-17 | Treacle decoloring process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127576C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8431432B2 (en) | 2007-04-27 | 2013-04-30 | Semiconductor Energy Laboratory Co., Ltd. | Manufacturing method of light-emitting device |
| CN101255177B (en) * | 2008-04-07 | 2011-11-23 | 广西大学 | Preparation of medicament-grade cane sugar by ion-exchange fibre method |
| CN102492781B (en) * | 2011-12-01 | 2013-11-27 | 桂林正翰科技开发有限责任公司 | Syrup decolorization method |
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2001
- 2001-09-17 CN CN 01142190 patent/CN1127576C/en not_active Expired - Fee Related
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