CN113881813A - Method for decoloring sugar juice by phosphorus-magnesium air flotation - Google Patents
Method for decoloring sugar juice by phosphorus-magnesium air flotation Download PDFInfo
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- CN113881813A CN113881813A CN202010620458.2A CN202010620458A CN113881813A CN 113881813 A CN113881813 A CN 113881813A CN 202010620458 A CN202010620458 A CN 202010620458A CN 113881813 A CN113881813 A CN 113881813A
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- magnesium
- sugar juice
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
- C13B20/005—Purification of sugar juices using chemicals not provided for in groups C13B20/02 - C13B20/14
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
- C13B20/02—Purification of sugar juices using alkaline earth metal compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention relates to a method for decoloring sugar juice by phosphorus-magnesium air flotation, which comprises the steps of respectively adding phosphoric acid and magnesium source substances into the sugar juice, adjusting the sugar juice to be alkaline by lime milk, enabling the phosphoric acid and the magnesium source substances to generate calcium phosphate and magnesium hydroxide with stronger adsorption effect on impurity components such as pigments in the sugar juice in situ, filling air bubbles, adding a flocculating agent for flocculation, and then carrying out phosphorus-magnesium air flotation treatment, so that most of non-sugar impurities such as pigments, colloidal particles and the like in the sugar juice can be removed, and alkaline clear juice with low color value is obtained. The method of the invention can overcome the defect of low pigment removal rate of the conventional phosphorus flotation method and has the advantages of good cleaning effect and high decolorization rate.
Description
Technical Field
The invention relates to a method for clarifying and decoloring cane sugar juice, in particular to a method for decoloring sugar juice by phosphorus-magnesium air flotation, belonging to the technical field of sugar industry.
Background
The air-float cleaning technique is to float the insoluble solid particles in the liquid to the liquid surface by the buoyancy of air bubbles for separation and removal. At present, sugar refinery at home and abroad commonly uses phosphorus float method, which is to add phosphoric acid and lime milk into sugar juice and heat to generate calcium phosphate floc, adsorb part of pigment and macromolecular colloidal substances in the sugar juice, and trap various suspended particles, then fill a proper amount of fine bubbles into sugar solution, add high-efficiency flocculant to generate flocculation action, form relatively coarse floc, form bubble floc with lower specific gravity with the fine bubbles and the floc in the sugar juice through adhesion and net trapping action, float upwards to gradually form relatively thick scum on the liquid surface, and the clear sugar juice is below the liquid surface.
The phosphorus floating method has good effect of removing insoluble impurities in sugar juice, clear and transparent clear liquid, but does not remove much soluble impurities, and the removal rate of pigment is low and is about 30%. In situ generation of Mg (OH)2Has the advantages of higher activity, excellent adsorption performance, stronger buffer capacity, environmental friendliness, no corrosiveness and the like, is a green, safe and environment-friendly water treatment agent, and has attracted the attention of researchers at home and abroad. The magnesium hydroxide colloidal particles generated in situ have light density and high-density positive charges on the surface, have strong adsorption effect on soluble pigments with negative charges and other non-sucrose impurities, and are very suitable for air floatation separation. At present, no report on the realization of the clarification and the decoloration of the sugar juice by using the common air flotation (phosphorus-magnesium air flotation for short) for generating the magnesium hydroxide and the calcium phosphate in situ is available.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a process for decoloring sugar juice by phosphorus-magnesium air floatation includes such steps as adding phosphoric acid and magnesium source to sugar juice, regulating sugar juice to alkaline by lime milk to make the phosphoric acid and magnesium source generate calcium phosphate and magnesium hydroxide with strong adsorption to pigment and other impurities in sugar juice, filling air bubbles, adding flocculant, flocculating, and air floatation of phosphorus and magnesium to remove most of pigment and colloidal particles from sugar juice to obtain low-colour alkaline clear juice. The method of the invention can overcome the defect of low pigment removal rate of the conventional phosphorus flotation method and has the advantages of good cleaning effect and high decolorization rate.
The technical scheme for solving the technical problems is as follows: a method for decoloring sugar juice by phosphorus-magnesium air flotation includes adding phosphoric acid into sugar juice, adding 150-500 mg of phosphoric acid into 1L of sugar juice, adding magnesium source substances, adding 100-400 mg/L of magnesium source substances into the sugar juice according to magnesium ions, adjusting the pH value of the sugar juice to 10.3-11.5 by lime milk, heating the sugar juice to 45-70 ℃, filling micro uniform bubbles into the sugar juice, adding a flocculating agent, uniformly mixing, carrying out phosphorus flotation treatment, and obtaining alkaline clear juice with low color value, or neutralizing the alkaline clear juice to the pH value of 7.0 by using sulfur dioxide gas to obtain final clear juice, or adding 100-200 mg of phosphoric acid into 1L of sugar juice, neutralizing the alkaline clear juice to the pH value of 7.0 by using the sulfur dioxide gas, and further carrying out cleaning by using an air flotation method.
The magnesium source material includes an insoluble magnesium source material including, but not limited to, magnesium oxide, magnesium hydroxide, magnesium carbonate, or magnesium silicate, and a soluble magnesium source material including, but not limited to, magnesium sulfate, magnesium chloride, magnesium nitrate, or magnesium dihydrogen phosphate.
The sugar juice is sugarcane mixed juice, raw sugar redissolution syrup or brown granulated sugar redissolution syrup.
The addition amount of the flocculating agent is 3-15 ppm.
Introducing micro and uniform bubbles into the sugar juice or adopting a bubble making machine to bubble in the sugar juice to introduce the micro and uniform bubbles, or taking 20-40% of the sugar juice, using the bubble making machine to bubble and introduce the micro and uniform bubbles, and then mixing with the rest sugar juice.
The invention belongs to the technical field of sugar industry, and discloses a method for decoloring sugar juice by phosphorus-magnesium air flotation, which comprises the following steps: respectively adding phosphoric acid and magnesium source substances into the sugar juice, adding ash, heating, introducing fine and uniform bubbles, adding a flocculating agent, and performing phosphorus and magnesium air flotation treatment to obtain alkaline clear juice with a low color value; after the alkaline clear juice is neutralized, the alkaline clear juice can be directly concentrated and boiled after being treated by a conventional air floatation method or a flocculation sedimentation method. The method is simple and efficient, and the obtained alkaline clear juice has low color value and important application prospect. The method and the process are not reported at home and abroad.
Magnesium hydroxide colloidal particles with high-density positive charges and calcium phosphate colloidal particles with positive charges on the surfaces are respectively generated in situ by using magnesium ions and phosphate ions under the alkaline condition, non-sugar components such as pigments with negative charges in the sugar juice are adsorbed, composite flocculates of magnesium hydroxide and calcium phosphate are generated under the action of a flocculating agent, and then air flotation separation is carried out after micro air bubbles are introduced, so that the high-efficiency clarification and decoloration of the sugar juice are realized. The method for decoloring sugar juice by phosphorus-magnesium air flotation has important application prospect in the sugar industry and the field of sugar juice cleaning treatment.
The technical features of the method for decoloring sugar juice by phosphorus-magnesium air flotation according to the present invention will be further described with reference to the following examples.
Detailed Description
Example 1: putting 200mL of sugarcane mixed juice into a 250mL beaker, adding phosphoric acid according to the proportion that 250mg of phosphoric acid is added into 1L of sugar juice, dissolving a proper amount of magnesium oxide, introducing 300mg/L of magnesium ions, stirring, adding lime milk to adjust the pH value to 11.1 after the pH value is stable to obtain ash added juice, heating to 60 ℃, pouring two fifths of the volume of the ash added juice into a foaming machine for foaming for 15s, mixing with the rest of the ash added juice, pouring into a transparent air flotation cylinder with scales, adding 10ppm of polyacrylamide serving as a flocculating agent, and carrying out phosphorus floatation treatment; after the scum is stabilized, taking alkaline clear juice under the scum into a 250mL beaker, adding phosphoric acid according to the addition of 150 mg of phosphoric acid into 1L of sugar juice, further introducing sulfur dioxide gas until the pH value is 7.0 to obtain neutralized juice, and treating the neutralized juice by adopting a conventional air floatation method, wherein the specific operation is as follows: heating to 100 deg.C, taking one third of the juice, pouring into a mechanical stirrer, foaming for 15s, mixing with the rest neutralized juice, pouring into a transparent air flotation cylinder with scales, adding flocculating agent polyacrylamide 10ppm, performing air flotation treatment, taking the clear juice from the scum after the scum is stabilized, and determining the decolorization rate to be 87.0%.
The comparative test of example 1, which has the same procedure as above but without the addition of magnesium oxide, gives a decolorization of 75.5%.
Example 2: adding 200mL of brown granulated sugar redissolved syrup (the content of the brown granulated sugar is 15%) into a 250mL beaker, adding 250mg of phosphoric acid into 1L of sugar juice, dissolving a proper amount of magnesium chloride hexahydrate, introducing 300mg/L of magnesium ions, stirring, adding lime milk to adjust the pH value to 11.1 after the pH value is stable to obtain ash added juice, heating to 60 ℃, pouring two fifths of the volume of the ash added juice into a foaming machine for foaming for 15s, mixing with the rest of the ash added juice, pouring into a transparent air flotation cylinder with scales, adding 10ppm of polyacrylamide serving as a flocculating agent, and carrying out air flotation treatment; after the scum is stabilized, taking the alkaline clear juice under the scum into a 250mL beaker, further introducing sulfur dioxide gas until the pH value is 7.0 to obtain neutralized juice, wherein the decolorization rate is 55.0 percent
The comparative test of example 2, which has the same procedure as above but without the addition of magnesium oxide, has a decolorization ratio of 50.1%.
Example 3: putting 200mL of 30% raw sugar redissolved syrup in a 250mL beaker, adding phosphoric acid in an amount of 300mg phosphoric acid according to 1L of sugar juice, dissolving a proper amount of magnesium hydroxide, introducing 400mg/L of magnesium ions, stirring, adding lime milk to adjust the pH value to 11.0 after the pH value is stable to obtain ash added juice, heating to 50 ℃, taking one third of the ash added juice, pouring the ash added juice into a mechanical foaming machine for foaming for 20s, mixing with the rest ash added juice, pouring into a transparent air flotation cylinder with scales, adding 8ppm of polyacrylamide serving as a flocculating agent, and carrying out air flotation treatment; after the scum is stabilized, taking the alkaline clear juice under the scum into a 250mL beaker, further introducing sulfur dioxide gas until the pH value is 7.0 to obtain neutralized juice, and determining the decolorization rate to be 61.1%.
The comparative experiment of example 3, having the same process steps as above but without adding magnesium hydroxide, showed a decolorization of 44.3%.
Example 4 taking 200mL brown granulated sugar redissolved syrup (the content of the brown granulated sugar is 15%) to a 250mL beaker, adding 250mg of phosphoric acid into 1L of sugar juice, dissolving a proper amount of magnesium oxide, introducing 300mg/L of magnesium ions, stirring, adding lime milk to adjust the pH value to 11.1 after the pH value is stable, obtaining ash added juice, heating to 60 ℃, pouring two fifths of the volume of the ash added juice into a foaming machine for foaming for 15s, mixing with the rest of the ash added juice, pouring into a transparent air flotation cylinder with scales, adding 10ppm of polyacrylamide serving as a flocculating agent, and carrying out air flotation treatment; after the scum is stabilized, taking alkaline clear juice under the scum into a 250mL beaker, adding phosphoric acid according to the addition of 150 mg of phosphoric acid into 1L of sugar juice, further introducing sulfur dioxide gas until the pH value is 7.0 to obtain neutralized juice, and treating the neutralized juice by adopting a conventional air floatation method, wherein the specific operation is as follows: heating to 100 deg.C, taking one third of the juice, pouring into a mechanical stirrer, foaming for 15s, mixing with the rest neutralized juice, pouring into a transparent air flotation cylinder with scales, adding flocculating agent polyacrylamide 10ppm, performing air flotation treatment, taking the clear juice from the scum after the scum is stabilized, and determining the decolorization rate to be 60.2%.
Claims (5)
1. A method for decoloring sugar juice by phosphorus-magnesium air flotation is characterized by comprising the following steps: adding phosphoric acid into sugar juice, wherein the adding amount of the phosphoric acid is 150-500 mg according to 1L of the sugar juice, then adding a magnesium source substance, the adding amount of the magnesium source substance in the sugar juice is 100-400 mg/L according to magnesium ions, then adjusting the pH value of the sugar juice to 10.3-11.5 by using lime milk, heating the sugar juice to 45-70 ℃, filling micro uniform bubbles into the sugar juice, then adding a flocculating agent for uniform mixing, and carrying out phosphorus floatation treatment, so that alkaline clear juice with low color value can be obtained, or the alkaline clear juice is obtained by neutralizing the pH value to 7.0 by using sulfur dioxide gas, or adding 100-200 mg of phosphoric acid into 1L of the sugar juice, then neutralizing the pH value to 7.0 by using sulfur dioxide gas and further carrying out cleaning treatment by using air for floatation.
2. The method for decoloring sugar juice by phosphorus-magnesium air flotation according to claim 1, wherein the method comprises the following steps: the magnesium source material includes an insoluble magnesium source material including, but not limited to, magnesium oxide, magnesium hydroxide, magnesium carbonate, or magnesium silicate, and a soluble magnesium source material including, but not limited to, magnesium sulfate, magnesium chloride, magnesium nitrate, or magnesium dihydrogen phosphate.
3. The method for decoloring sugar juice by phosphorus-magnesium air flotation according to claim 1 or 2, wherein the method comprises the following steps: the sugar juice is sugarcane mixed juice, raw sugar redissolution syrup or brown granulated sugar redissolution syrup.
4. The method for decoloring sugar juice by phosphorus-magnesium air flotation according to claim 1 or 2, wherein the method comprises the following steps: the addition amount of the flocculating agent is 3-15 ppm.
5. The method for decoloring sugar juice by phosphorus-magnesium air flotation according to claim 1 or 2, wherein the method comprises the following steps: introducing micro and uniform bubbles into the sugar juice or adopting a bubble making machine to bubble in the sugar juice to introduce the micro and uniform bubbles, or taking 20-40% of the sugar juice, using the bubble making machine to bubble and introduce the micro and uniform bubbles, and then mixing with the rest sugar juice.
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| CN202010620458.2A CN113881813B (en) | 2020-07-01 | 2020-07-01 | Method for decoloring sugar juice by phosphorus-magnesium air floatation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797263A (en) * | 2022-05-09 | 2022-07-29 | 宁夏紫光天化蛋氨酸有限责任公司 | Method for treating ethylene glycol secondary refrigerant |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007017102A1 (en) * | 2005-07-27 | 2007-02-15 | Süd-Chemie AG | Adsorbent and method for purification of crude sugar juices |
| CN101126108A (en) * | 2007-09-29 | 2008-02-20 | 华南理工大学 | Ashless phosphoric acid air-float cleaning method for syrup |
| BRPI1103108A2 (en) * | 2011-06-01 | 2013-07-02 | Ct Royal Quimica Ind Ltda | additive and improved process applied to clarify sugarcane juice syrup for white crystal and refined sugar |
| CN105002306A (en) * | 2015-07-22 | 2015-10-28 | 广州甘蔗糖业研究所 | Sugar juice sulfur-free efficient cleaning method |
| CN110453016A (en) * | 2018-09-28 | 2019-11-15 | 广西科技大学 | A kind of method of the cane milling juice without sulphur clarification decoloration |
| CN110791593A (en) * | 2018-08-03 | 2020-02-14 | 广西科技大学 | Method for decoloring sugar juice by using water-soluble magnesium salt-lime |
| CN111206124A (en) * | 2020-02-28 | 2020-05-29 | 广西科技大学 | Method for decoloring sugar juice by using magnesium silicate film |
-
2020
- 2020-07-01 CN CN202010620458.2A patent/CN113881813B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007017102A1 (en) * | 2005-07-27 | 2007-02-15 | Süd-Chemie AG | Adsorbent and method for purification of crude sugar juices |
| CN101126108A (en) * | 2007-09-29 | 2008-02-20 | 华南理工大学 | Ashless phosphoric acid air-float cleaning method for syrup |
| BRPI1103108A2 (en) * | 2011-06-01 | 2013-07-02 | Ct Royal Quimica Ind Ltda | additive and improved process applied to clarify sugarcane juice syrup for white crystal and refined sugar |
| CN105002306A (en) * | 2015-07-22 | 2015-10-28 | 广州甘蔗糖业研究所 | Sugar juice sulfur-free efficient cleaning method |
| CN110791593A (en) * | 2018-08-03 | 2020-02-14 | 广西科技大学 | Method for decoloring sugar juice by using water-soluble magnesium salt-lime |
| CN110453016A (en) * | 2018-09-28 | 2019-11-15 | 广西科技大学 | A kind of method of the cane milling juice without sulphur clarification decoloration |
| CN111206124A (en) * | 2020-02-28 | 2020-05-29 | 广西科技大学 | Method for decoloring sugar juice by using magnesium silicate film |
Non-Patent Citations (1)
| Title |
|---|
| 毛祥，等: "铁离子强化镁盐清净赤砂糖回溶糖浆工艺", 食品工业, vol. 41, no. 3, pages 35 - 40 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114797263A (en) * | 2022-05-09 | 2022-07-29 | 宁夏紫光天化蛋氨酸有限责任公司 | Method for treating ethylene glycol secondary refrigerant |
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