NZ621417A - New additive for sugar manufacturing with cane, and preparation method therefor and application method thereof in sugar manufacturing - Google Patents

Abstract

Disclosed herein is a additive for sugar manufacturing with cane comprising concentrated phosphoric acid 100 parts by weight and chitosan 0.5-50 parts by weight. Also disclosed is a preparation method for the additive and its application in sugar manufacturing industry. The preparation method comprises: adding 0.5 to 50 weight parts of chitosan in 100 weight parts of concentrated phosphoric acid, and reacting for 30 to 120 min at a temperature of 8°C to 300°C.

Description

NEW ADDITIVE FOR SUGAR MANUFACTURING WITH CANE, AND PREPARATION METHOD THEREFOR AND APPLICATION METHOD THEREOF IN SUGAR MANUFACTURING Technical Field The present invention relates to an additive, more particularly, to a new additive for sugar made from sugarcane, preparation method and application method in sugar production thereof.

Background Art Purification procedure is a key point of the sugar production process in the technics of making sugar from sugarcane. A large amount of sugarcane juice, at least thousands of tons or more than tens of thousands of tons sometimes, should be processed in a sugar refinery each day. Furthermore, sugarcane juice is a solution comprising a plurality of different components, and itself is a colloid. Accordingly, the components contained in the sugarcane juice are unstable and can be changed easily, and complicated physical chemistry changes often take place due to the affect of different kinds of conditions, which results in unexpected difficulties in the purification procedure.

At present, sugar production industries all over the world generally employ a great deal of sulfur dioxide produced by burning sulfur as a main additive to fumigate the sugarcane juice for discoloring and clarifying, or employ carbon dioxide as a main additive and sulfur dioxide as an assistant additive for discoloring and clarifying. Accordingly, there is more or less remained sulfur in the berry sugar produced by the sugar refinery. Sulfur dioxide and the derivative thereof are carcinogen. Besides harmful matters containing remained sulfur, the berry sugar produced by the sugar refinery now comprises remained derivatives of sulfur dioxide.

However, the actual test standard for the berry sugar never requires detection of sulfur dioxide derivatives. Accordingly, there is still latent harm for food safety in sugar product.

In order to replace the harmful additive (food additive) of sulfur dioxide, using other material to replace sulfur dioxide for discoloring and clarifying the sugar juice is not too difficult to be done in the experimental phase. However, it is not an easy work but an extremely difficult system engineering to find a new additive which can be applied in large scale production of sugar production industry.

Disclosure of the Invention An objective of the present invention is to provide a new additive for sugar made from sugarcane which can be used to discolor and clarify sugarcane juice effectively without sulfur and is safe from harmful residue, aiming at the drawbacks that sulfur dioxide and the derivatives thereof are remained in the berry sugar produced through discoloring and clarifying the sugarcane juice by sulfur.

Another objective of the present invention is to provide a preparation method of the new additive for sugar made from sugarcane, which is scientific, safe, effective and has multiple choices.

Another objective of the present invention is to provide an application method of the new additive used in sugar production, which cancels operations of sulfur fumigating and neutralization, obtains clear juice with higher quality through high effective processing of sugar juice without sulfur, and requires less invest and low power consumption.

According to an aspect, a new additive for sugar made from sugarcane is provided, comprising raw materials with the following parts by weight: concentrated phosphoric acid 100, chitosan 0.5-50.

Advantageously, the new additive for sugar made from sugarcane further comprises zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight.

Advantageously, the new additive for sugar made from sugarcane further comprises acetic acid of 1-9.6 parts by weight.

Advantageously, the new additive for sugar made from sugarcane further comprises diatomite of 15-90 parts by weight.

According to an aspect of the present invention, a preparation method of the new additive for sugar made from sugarcane is provided, comprising: weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight; reacting for 30-120 minutes at 8-300 ℃, and then obtaining the new additive for sugar made from sugarcane, that is, a macromolecule compound of high fiber and polyphosphate with strong positive charge.

According to another aspect of the present invention, a preparation method of the new additive for sugar made from sugarcane is provided, comprising: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge generated in step (1), stirring and then obtaining the new additive for sugar made from sugarcane in liquid form.

According to a further aspect of the present invention, a preparation method of the new additive for sugar made from sugarcane is provided, comprising: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight and acetic acid of 1-9.6 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge generated in step (1), stirring and then obtaining the new additive for sugar made from sugarcane in liquid form.

According to a further aspect of the present invention, a preparation method of the new additive for sugar made from sugarcane is provided, comprising: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight and acetic acid of 1-9.6 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge generated in step (1), stirring and then obtaining a liquid additive for sugar made from sugarcane; (3) adding diatomite of 15-90 parts by weight, fineness of which is 40-120 items, into the liquid additive for sugar made from sugarcane, stirring to absorb all the liquid additive for sugar made from sugarcane into the diatomite, then drying to obtain the new additive for sugar made from sugarcane.

According to an aspect of the present invention, an application method of the new additive for sugar made from sugarcane in sugar production is provided, comprising: (1) during a sugarcane extracting procedure, extracting sugarcane for a plurality of times to obtain juice extracted from the sugarcane for the plurality of times, and adding the new additive for sugar made from sugarcane into the juice extracted from at least one of the plurality times and stirring, or adding the new additive for sugar made from sugarcane into a mixture of the juice extracted from the plurality of times and stirring, wherein an adding amount of the new additive for sugar made from sugarcane is 0.2-1.5kg/m3, and a pH value of the extracted juice or the mixture is controlled to be 6.8-8.5; (2) during a refining procedure, heating preliming juice of the present procedure to 50- 85 ℃, then adding the new additive for sugar made from sugarcanewith an amount of 0.025- 1kg/m3, controlling a pH value to 7-7.5 when operating to a neutralization procedure, then heating the preliming juice to 95-105 ℃, adding flocculant 0.5-5ppm, stirring slowly so that extremely fine suspended substance adequately contacts the new additive for sugar made from sugarcane which has positive charge and then the resulting juice entering a sedimenttrap and being purified to obtain clear juice.

Advantageously, the application method of the new additive for sugar made from sugarcane in sugar production further comprises after the purification procedure, adding the new additive for sugar made from sugarcane with an amount of 0.02-0.1kg/m3 into the clear juice obtained in the purification procedure to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.9-7.3, then obtaining clear juice of higher quality after being filtered.

Advantageously, the application method of the new additive for sugar made from sugarcane in sugar production further comprises in a producing procedure of clear syrup, adding the new additive for sugar made from sugarcane with an amount of 0.05-0.6kg/m3 into the clear syrup to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.2-7.0, then obtaining clear syrup of higher quality after being filtered.

According to another aspect of the present invention, an application method of the new additive for sugar made from sugarcane in sugar production is provided, comprising during a sugarcane extracting procedure, extracting sugarcane for a plurality of times to obtain juice extracted from the sugarcane for the plurality of times, and adding the new additive for sugar made from sugarcane into the juice extracted from at least one of the plurality times and stirring, or adding the new additive for sugar made from sugarcane into a mixture of the juice extracted from the plurality of times and stirring, wherein an adding amount of the new additive for sugar made from sugarcane is 0.2-1.5kg/m3, and a pH value of the extracted juice or the mixture is controlled to be 6.8-8.5.

According to a further aspect of the present invention, an application method of the new additive for sugar made from sugarcane in sugar production is provided, comprising in a refining procedure, heating preliming juice of the present procedure to 50-85 ℃, then adding the new additive for sugar made from sugarcane with an amount of 0.025-1kg/m3, controlling a pH value to 7-7.5 when operating to a neutralization procedure, then heating the preliming juice to 95- 105 ℃, adding flocculant 0.5-5ppm, stirring slowly so that extremely fine suspended substance adequately contacts the new additive for sugar made from sugarcane which has positive charge and then the resulting juice entering a sedimenttrap and being purified to obtain clear juice.

The main raw materials in the new additive for sugar made from sugarcane according to the present invention are concentrated phosphoric acid and chitosan, when both of which react in a circumstance of 8-300 ℃, phosphoric acid gradually changes to polyphosphoric acid via dehydration condensation. In additional, a certain amount of polyphosphoric acid can form macromolecule polyphosphoric acid having a molecular weight higher than 10000. The phosphoric acid and the generated polyphosphoric acid can react with the chitosan so as to generate a macromolecule compound of high fiber and polyphosphate with strong positive charge. Here, certain amount of zinc lactate, zinc citrate or zinc sulfate and certain amount of acetic acid are added. In the process of generating compound via chemical reaction, the strength of phosphate hydrogen ion increases with the dehydration condensation, amide on the macromolecule chain combines with phosphate hydrogen ion and forms –NH3+, in such a way, intensity of the positive charge is increased and chemical activity of other active group and link active centre are activated. Finally, certain amount of diatomite is added for absorbing the reaction product and highly economizing the reaction product, so as to enhance function of each resultant. The resulted new additive possesses excellent physicochemical property.

Best Mode for Carrying out the Invention A first new additive for sugar made from sugarcane comprises raw materials with the following parts by weight: concentrated phosphoric acid 100, chitosan 0.5-50.

The new additive for sugar made from sugarcane is a basic additive. The above raw materials can prepare a reaction product, i.e., a macromolecule compound of high fiber and polyphosphate with strong positive charge, which can be used for discoloring and clarifying the sugarcane juice.

Table 1 concentrated chitosan reaction reaction phosphoric acid time temperature Embodiment 1 100 0.5 120min 8 ℃ Embodiment 2 100 30 30min 300 ℃ Embodiment 3 100 50 60min 120 ℃ A preparation method of the first new additive for sugar made from sugarcane comprises: weighting concentrated phosphoric acid of 100 parts by weight and chitosan of 0.5-50 parts by weight; reacting for 30-120 minutes at 8-300 ℃, and then obtaining the new additive for sugar made from sugarcane, that is, a macromolecule compound of high fiber and polyphosphate with strong positive charge. The detail reaction conditions of each embodiment can refer to Table 1.

A second new additive for sugar made from sugarcane comprises raw materials with the following parts by weight: concentrated phosphoric acid 100, chitosan 0.5-50, zinc lactate 0.5-8, wherein the zinc lactate can be replaced by zinc citrate or zinc sulfate. The second new additive for sugar made from sugarcane is obtained from adding zinc lactate based on the first new additive for sugar made from sugarcane, with such addition of zinc lactate, the adsorption and clarification abilities of the new additive for sugar made from sugarcane are improved.

Table 2 concentrated chitosan zinc reaction reaction phosphoric lactate time temperature acid Embodiment 4 100 0.5 3 120min 8 ℃ Embodiment 5 100 10 0.5 30min 300 ℃ Embodiment 6 100 20 8 60min 120 ℃ Embodiment 7 100 49 5 40min 200 ℃ A preparation method of the second new additive for sugar made from sugarcane comprises the following steps: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge generated in step (1), stirring and then obtaining the new additive for sugar made from sugarcane in liquid form. The detail reaction conditions of each embodiment can refer to Table 2.

A third new additive for sugar made from sugarcane is obtained from adding acetic acid as antiseptic based on the second new additive for sugar made from sugarcane. An adding amount of the acetic acid is 1-9.6 parts by weight. The zinc lactate can be replaced by zinc citrate.

Table 3 concentrated chitosan zinc acetic reaction reaction phosphoric citrate acid time temperature acid Embodiment 8 100 1 3 3 100min Embodiment 9 100 8 0.5 1 120min 20 ℃ Embodiment 100 12 8 9.6 70min 120 ℃ Embodiment 100 35 5 5 30min 300 ℃ A preparation method of the third new additive for sugar made from sugarcane comprises: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight, and acetic acid of 1-9.6 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge, stirring and then generating a liquid new additive for sugar made from sugarcane. The detail reaction conditions of each embodiment can refer to Table 3.

A fourth new additive for sugar made from sugarcane is obtained from adding diatomite of 15-90 parts by weight based on the third new additive for sugar made from sugarcane. The porous diatomite with large surface area is more preferable. The fineness (granularity) of the diatomite is 40-120 items. The selected diatomite can possess any value of fineness in the range mentioned above.

Table 4 concentrated chitosan zinc acetic diatomite reaction reaction phosphoric lactate acid time temperature acid Embodiment 100 1 3 2 15 120min Embodiment 100 8 0.5 1 20 95min 60 ℃ Embodiment 100 12 8 9.6 57 100min 80 ℃ Embodiment 100 35 5 5 90 115min 10 ℃ Embodiment 100 20 2 4 80 30min 300 ℃ Embodiment 100 45 7 9 65 55min 220 ℃ A preparation method of the fourth new additive for sugar made from sugarcane comprises the following steps: (1) weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight, reacting for 30-120 minutes at 8-300 ℃, then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge; (2) adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight, and acetic acid of 1-9.6 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge, stirring and then obtaining a liquid additive for sugar made from sugarcane; (3) adding diatomite of 15-90 parts by weight into the liquid additive for sugar made from sugarcane, stirring to absorb all the liquid additive for sugar made from sugarcane into the diatomite, then drying to obtain the new additive for sugar made from sugarcane. The detail reaction conditions of each embodiment can refer to Table 4.

A fifth new additive for sugar made from sugarcane is obtained from adding diatomite of -90 parts by weight based on the first new additive for sugar made from sugarcane. The porous diatomite with large surface area is more preferable. The fineness (granularity) of the diatomite is 40-120 items. The detail raw materials and reaction conditions of each embodiment can refer to Table 5.

Table 5 concentrated chitosan diatomite reaction time reaction phosphoric temperature acid Embodiment 100 0.8 15 118min 9 ℃ 290 ℃ Embodiment 100 44 45 38min Embodiment 100 33 90 66min 250 ℃ A sixth new additive for sugar made from sugarcane is obtained from adding diatomite of -90 parts by weight based on the second new additive for sugar made from sugarcane. The porous diatomite with large surface area is more preferable. The fineness (granularity) of the diatomite is 40-120 items. The detail raw materials and reaction conditions of each embodiment can refer to Table 6.

Table 6 concentrated chitosan zinc diatomite reaction reaction phosphoric lactate time temperature acid Embodiment 100 17 2.5 22 112min 12 ℃ Embodiment 100 25 1.5 59 40min 285 ℃ Embodiment 100 32 7.5 68 75min 265 ℃ Besides, the new additives for sugar made from sugarcane according to present invention can be obtained by adding at least one of zinc lactate (zinc citrate or zinc sulfate), acetic acid and diatomite based on the first new additive for sugar made from sugarcane, which are not listed one by one. Such new additives for sugar made from sugarcane all can discolor or clarify the sugarcane juice.

A first application method of the new additive for sugar made from sugarcane in sugar production comprises: (1) during a sugarcane extracting procedure, extracting sugarcane for a plurality of times to obtain juice extracted from the sugarcane for the plurality of times, and adding the new additive for sugar made from sugarcane obtained from the embodiments 1-23 into the juice extracted from the sugarcane for at least one of the plurality of times and stirring, or adding the new additive for sugar made from sugarcane obtained from the embodiments 1-23 into a mixture of the juice extracted from the sugarcane for the plurality of times and stirring, wherein an adding amount of the new additive for sugar made from sugarcane is 0.2-1.5kg/m3, and a pH value of the extracted juice or the mixture is controlled to be 6.8-8.5; (2) during a refining procedure, heating preliming juice of the present procedure to 50- 85 ℃, then adding the new additive for sugar made from sugarcane obtained from the embodiments 1-23 with an amount of 0.025-1kg/m3, controlling a pH value to 7-7.5 when operating to a neutralization procedure, then heating the preliming juice to 95-105 ℃, adding flocculant 0.5-5ppm, stirring slowly so that extremely fine suspended substance adequately contacts the new additive for sugar made from sugarcane which has positive charge and then the resulting juice enters a sedimenttrap and being purified to obtain clear juice.

Meanwhile, adding the new additive for sugar made from sugarcane obtained from the embodiments 1-23 in the above procedures at the same time can improve each index of the commercial product sugar to a higher level. The specific usage amount of the new additive for sugar made from sugarcane and the reaction conditions can refer to table 7.

Table 7 Adding pH value Adding pH value First Second Adding amount of in amount of in refining heating heating amount of the new extracting the new procedure temperature temperature the additive in procedure additive in of preliming of preliming flocculant extracting refining juice in juice in in refining procedure procedure refining refining procedure （kg/m3 ） （kg/m3 ） procedure procedure ℃ （ppm ） Embodiment 0.2 7 1 7 55 105 0.5 Embodiment 0.8 6.8 0.8 7.2 85 100 2.7 Embodiment 1.2 7.5 0.1 7.5 60 95 2.8 Embodiment 1.5 8.5 0.025 7 70 98 5 In order to further lower the color value of the clear juice, and improve the purity of the clear juice, the application method of the new additive for sugar made from sugarcane further comprises after the purification procedure, based on the embodiments 24-27, adding the new additive for sugar made from sugarcane with an amount of 0.02-0.1kg/m3 into the clear juice obtained in the purification procedure to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.9-7.3, then obtaining clear juice of higher quality after being filtered. The adding amount of the new additive for sugar made from sugarcane can take 0.05 kg/m3, 0.02 kg/m3, 0.1 kg/m3 or 0.08 kg/m3.

In addition to the usage of the new additive for sugar made from sugarcane in the sugarcane extracting procedure, the refining procedure and the purification procedure, the application method of the new additive for sugar made from sugarcane further comprises in the producing procedure of clear syrup, adding the new additive for sugar made from sugarcane with an amount of 0.05-0.6kg/m3 into the clear syrup to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.2-7.0, then obtaining clear syrup of higher quality after being filtered. The adding amount of the new additive for sugar made from sugarcane can take 0.05kg/m3, 0.09kg/m3, 0.12 kg/m3 or 0.2kg/m3.

Through using the new additive for sugar made from sugarcane in the four work procedures at the same time, in a separated or combined way, the purity of the sugar juice can be improved obviously, so that, more and better berry sugar can be produced.

A second application method of the new additive for sugar made from sugarcane in sugar production is applied to a sugarcane extracting procedure, and comprises extracting sugarcane for a plurality of times to obtain juice extracted from the sugarcane for the plurality of times, and adding the new additive for sugar made from sugarcane into the juice extracted from the sugarcane for at least one of the plurality times and stirring, or adding the new additive for sugar made from sugarcane into a mixture of the juice extracted from the sugarcane for the plurality of times and stirring, wherein an adding amount of the new additive for sugar made from sugarcane is 0.2-1.5kg/m3, and a pH value of the extracted juice or the mixture is controlled to be 6.8-8.5. The specific usage amount of the new additive for sugar made from sugarcane and the reaction conditions can refer to table 8.

Table 8 Adding amount of the pH value in extracting new additive in extracting procedure procedure （kg/m3 ） Embodiment 28 0.2 7.1 Embodiment 29 0.7 6.9 Embodiment 30 1.1 7.7 Embodiment 31 1.5 8.5 A third application method of the new additive for sugar made from sugarcane in sugar production, is applied to a refining procedure and comprises heating preliming juice of the present procedure to 50-85 ℃, then adding the new additive for sugar made from sugarcane with an amount of 0.025-1kg/m3, controlling a pH value to 7-7.5 when operating to a neutralization procedure, then heating the preliming juice to 95-105 ℃, adding flocculant 0.5- 5ppm, stirring slowly so that extremely fine suspended substance adequately contacts the new additive for sugar made from sugarcane which has positive charge and then the resulting juice entering a sedimenttrap and being purified to obtain clear juice. The specific usage amount of the new additive for sugar made from sugarcane and the reaction conditions can refer to table 9.

Table 9 Adding pH value in First heating Second Adding amount of the refining temperature heating amount of the new additive procedure of preliming temperature flocculant in in refining juice in of preliming refining procedure refining juice in procedure （kg/m3 ） procedure refining （ppm ） ℃ procedure ℃ Embodiment 0.9 7.1 80 104 2.6 Embodiment 0.7 7.3 76 97 2.9 Embodiment 0.4 7.6 65 102 2.75 Embodiment 0.01 7 51 99 3 Test for the application results of the new additive for sugar made from sugarcane according to the present invention in sugar production: Apparatus or method used in the test can refer to table 10.

Table 10 Test item Apparatus or method used in the test brix detection gravimetric brix spindle, abbe refractometer apparent purity detection gravimetric brix spindle, automatic, polarimeter color value detection abbe refractometer, spectrophotometer, acidimeter reducing sugar detection titration sucrose content detection polarimeter conductivity ash detection conductivity meter turbidity detection spectrophotometer pH value detection acidimeter The application effect of the new additive for sugar made from sugarcane according to the present invention may refer to table 11, which shows detection data of the plurality of the embodiments according to the preset invention, wherein: 1. The new additive for sugar made from sugarcane according to the present invention may replace the application of sulfur in sugar production industry, which enables the sugar production process more environmental friendly, consuming less power, more effective, what is more important, making the product safer and healthier. 2. The increase of apparent purity means the clarity efficiency of the sugar source is higher which directly affects the working effect of the continuative procedures and the quality and output of the commercial sugar. There are three points of view about the relationship between the apparent purity and the output of the commercial sugar currently. 1) Each time the apparent purity increases 1AP, the corresponding desaccharify rate will increase 0.1 percentage point. 2) Each time the apparent purity increases 1AP, the corresponding desaccharify rate will increase 0.13 percentage point. 3) Each time the apparent purity increases 1AP, the corresponding desaccharify rate will increase 0.7 percentage point.

These three points of view have a common feature that once the apparent purity increases, the corresponding desaccharify rate increases at the same time, that is, more berry sugar will be produced without increasing raw materials. No matter which view of point is more exact, once the apparent purity increases 1AP, a sugar refinery extracting sugarcane 10000 tones each day will additionally produce more than 10 tons of berry sugar based on the same sugarcane consumption amount. If the apparent purity can increase 2AP, 20 tons of additional berry sugar can be produced each day. The sugar refinery can get more economical benefit of fourteen millions yuan on the condition that the extraction season lasts for 100 days and the price of the sugar never lower than 7 thousands yuan.

Referring to table 11, it can be seen that the apparent purity of berry sugar produced according to the embodiments of the present invention is averagely 2.84AP higher than that produced without using the new additive for sugar made from sugarcane according to the present invention. Accordingly, the application of the new additive for sugar made from sugarcane according to the present invention may bring the sugar refinery considerable economical benefit.

Claims (13)

1. An additive for sugar made from sugarcane, comprising a macromolecule compound of high fiber and polyphosphate with strong positive charge prepared by reacting concentrated phosphoric acid of 100 parts by weight and chitosan of 0.5-50 parts by weight.

2. The additive for sugar made from sugarcane according to claim 1, further comprising zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight.

3. The additive for sugar made from sugarcane according to claim 1 or 2, further comprising diatomite of 15-90 parts by weight.

4. The additive for sugar made from sugarcane according to claim 1 or 2, further comprising acetic acid of 1-9.6 parts by weight.

5. The additive for sugar made from sugarcane according to claim 4, further comprising diatomite of 15-90 parts by weight.

6. A preparation method of an additive for sugar made from sugarcane, comprising: weighting concentrated phosphoric acid of 100 parts by weight, chitosan of 0.5-50 parts by weight; reacting for 30-120 minutes at 8-300 ℃, and then obtaining a macromolecule compound of high fiber and polyphosphate with strong positive charge as the additive for sugar made from sugarcane.

7. The preparation method for an additive for sugar made from sugarcane according to claim 6, wherein the method further includes: adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge, stirring and then obtaining the additive for sugar made from sugarcane.

8. The preparation method for an additive for sugar made from sugarcane according to claim 6, wherein the method further includes: adding zinc lactate, zinc citrate or zinc sulfate of 0.5-8 parts by weight and acetic acid of 1- 9.6 parts by weight into the macromolecule compound of high fiber and polyphosphate with strong positive charge, stirring and then obtaining the additive for sugar made from sugarcane

9. The preparation method for an additive for sugar made from sugarcane according to claim 8, wherein the additive for sugar made from sugarcane is liquid, the method further includes: adding diatomite of 15-90 parts by weight, fineness of which is 40-120 items, into the liquid additive for sugar made from sugarcane, stirring to absorb all the liquid additive for sugar made from sugarcane into the diatomite, then drying to obtain the additive for sugar made from sugarcane.

10. An application method of an additive for sugar made from sugarcane in sugar production, comprising during a sugarcane extracting procedure, extracting sugarcane for a plurality of times to obtain juice extracted from the sugarcane for the plurality of times, and adding the additive for sugar made from sugarcane according to any one of claims 1-5 into the juice extracted from the sugarcane for at least one of the plurality of times and stirring, or adding the additive for sugar made from sugarcane according to any one of claims 1-5 into a mixture of the juice extracted from the sugarcane for the plurality of times and stirring, wherein an adding amount of the additive for sugar made from sugarcane is 0.2-1.5kg/m , and a pH value of the extracted juice or the mixture is controlled to be 6.8-8.5.

11. The application method of an additive for sugar made from sugarcane in sugar production according to claim 10, comprising during a refining procedure, heating preliming juice of the present procedure to 50-85 ℃, then adding the additive for sugar made from sugarcane according to any one of claims 1-5 with an amount of 0.025-1kg/m , controlling a pH value to 7- 7.5 when operating to a neutralization procedure, then heating the preliming juice to 95-105 ℃, adding flocculant 0.5-5ppm, stirring slowly so that extremely fine suspended substance adequately contacts the additive for sugar made from sugarcane which has positive charge and then the resulting juice entering a sedimenttrap and being purified to obtain clear juice.

12. The application method of an additive for sugar made from sugarcane in sugar production according to claim 11, further comprising after the purification procedure, adding the additive for sugar made from sugarcane obtained according to any one of claims 1-5 with an amount of 0.02-0.1kg/m into the clear juice obtained in the purification procedure to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.9-7.3, then obtaining clear juice of higher quality after being filtered.

13. The application method of an additive for sugar made from sugarcane in sugar production according to claims 11 or 12, further comprising in a producing procedure of clear syrup, adding the additive for sugar made from sugarcane obtained according to any one of claims 1-5 with an amount of 0.05-0.6kg/m into the clear syrup to make a further process, and adjusting the pH value with saccharified calcium to control the pH value between 6.2-7.0, then obtaining clear syrup of higher quality after being filtered.