Preparation process and application of sucrose syrup

Abstract

The invention provides a preparation process and application of sucrose syrup, and belongs to the technical field of food production and processing. According to the method, high-purity L-arabinose is used and matched with purified maltitol, the purity of the sucrose syrup raw material is improved, the influence of impurities is reduced, meanwhile, the modified nanofiltration membrane is selected to conduct impurity removal treatment on the syrup mixture, the ash content of the sucrose syrup is reduced through the comprehensive synergistic effect, and meanwhile the light transmittance of the syrup is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of food production and processing, and in particular relates to a preparation process and application of sucrose syrup. Background Art

[0002] Sucrose is a disaccharide composed of one molecule of glucose and one molecule of fructose, and is commonly found in plants such as sugarcane and beets. Sucrose syrup is a syrup produced by the conversion reaction of sucrose under certain conditions. It can be used as a sweetener in the beverage industry, and can also be used to make pastries and other foods that need to increase sweetness and moistness. It is widely used in food and beverage production and processing.

[0003] The existing sucrose syrup is easy to cause the ash content of the sucrose syrup finished product to be high due to impurities remaining in the raw materials, and acid flocculants appear in the later circulation process. At the same time, the phenols, reducing sugar decomposition products, pseudo-melanin, iron ions, etc. remaining in the sugar products are considered to be the reasons for the decrease in transmittance in the product storage stage, so it is often necessary to carry out decolorization, filtration and impurity removal processes to improve the transmittance. The invention patent (publication number is CN114128868A) discloses a L-arabinose sucrose syrup composition and its preparation method, which can have a sweet taste and good taste, healthier characteristics without significantly increasing blood sugar, can be eaten by obese people and diabetic patients, and can be used as a healthier syrup food for sucrose of equal quality. However, there are still problems such as high ash content caused by raw material impurities in sucrose syrup, and poor filtration and impurity removal in the preparation process causing a decrease in transmittance, which cannot meet the needs of the existing market.

[0004] Therefore, there is an urgent need for a preparation process for sucrose syrup that can purify the raw materials to reduce the ash content of the syrup, while improving the filtering and impurity removal efficiency and increasing the light transmittance of the syrup. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation process and application of sucrose syrup, by using high-purity L-arabinose in combination with purified maltitol, the purity of the sucrose syrup raw material is improved, the influence of impurities is reduced, and a modified nanofiltration membrane is used to remove impurities from the syrup mixture, and the ash content of the sucrose syrup is reduced through comprehensive synergistic effects, while the light transmittance of the syrup is improved.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The first aspect of the present invention provides a process for preparing sucrose syrup, comprising the following steps:

[0008] Step S1: weighing 60-80 parts of sucrose, 5-15 parts of high-purity L-arabinose, 5-15 parts of maltitol and 3-5 parts of D-xylose in parts by weight and placing them in a stirring tank, adding 200-250 parts of deionized water, stirring at 70-80° C. for 1-2 hours to obtain a mixed solution;

[0009] Step S2: removing impurities from the mixed solution in step S1 through a modified nanofiltration membrane to obtain a mixed solution after impurities removal;

[0010] Step S3: vacuum concentrate the impurity-removed mixed solution in step S2 to obtain sucrose syrup.

[0011] As a preferred solution, the method for preparing high-purity L-arabinose comprises:

[0012] In parts by weight, 100 to 200 parts of corn residue are added to 1000 to 1200 parts of deionized water, stirred at 90 to 110° C. for 1 to 3 hours, centrifuged to obtain the supernatant after the stirring is completed, and then 200 to 300 parts of ethanol are added to generate a precipitate, which is filtered to obtain the precipitate; 20 to 30 parts of the precipitate are added to 50 to 60 parts of deionized water, stirred at 95 to 115° C. for 1 to 2 hours, and then 50 to 60 parts of deionized water are added, the temperature is lowered to 45 to 55° C., the pH is adjusted to 5.5 to 6.5 with acetic acid, and stirred for acidification for 3 to 4 hours; then 0.2 to 0.3 parts of arabinofuranosidase are added, stirred at 45 to 55° C. for 8 to 10 hours, and then impurities are removed by hydroxyboron resin, and high-purity L-arabinose is obtained by concentration and crystallization.

[0013] As a preferred solution, the hydroxy-boron-containing resin is hydroxy-boron-containing resin I and hydroxy-boron-containing resin II; the structural formula of the hydroxy-boron-containing resin I is:

[0014]

[0015] In the hydroxyl boron resin I, n is selected from an integer ranging from 10 to 30;

[0016] The structural formula of the hydroxyl boron resin II is:

[0017]

[0018] In the hydroxy boron-containing resin II, n is selected from an integer ranging from 10 to 20.

[0019] As a preferred solution, the mass ratio of hydroxyl boron resin I to hydroxyl boron resin II is (1-2):1.

[0020] By forming a stable complex containing a ring structure with hydroxyboron resin and impurities such as furfural in L-arabinose, the content of effective impurities such as furfural is removed, the risk of toxic side effects of impurities is reduced, and mineral elements such as potassium, calcium, and magnesium in corn residues are removed. By reducing the impurity content in the raw material components, the ash content in the final syrup is reduced.

[0021] As a preferred solution, the maltitol is purified maltitol. The preparation method of the purified maltitol comprises:

[0022] In parts by weight, 500-600 mL of maltose syrup and 7-10 parts of nickel-based composite powder are added to a hydrogenation kettle, and stirred for 1-2 hours to obtain a reaction substrate; the pH of the reaction substrate is adjusted to 5.5-5.8, the temperature of the reactor is set to 125-135° C., and the pressure is set to 8.5-9.5 MPa, and the reaction is carried out for 2-3 hours; after the reaction is completed, the reaction solution is subjected to cooling, sedimentation, and filtering treatments in sequence to obtain a maltitol solution, and the maltitol solution is concentrated and crystallized to obtain purified maltitol.

[0023] As a preferred solution, the method for preparing the nickel-based composite powder comprises:

[0024] In parts by weight, 10 to 15 parts of graphene oxide are added to 100 to 120 parts of deionized water, and after being stirred evenly, 3 to 5 parts of a sodium hydroxide solution with a mass concentration of 10% and 5 to 8 parts of a nickel catalyst are added, followed by ball milling to obtain a nickel-graphene oxide mixed solution; the nickel-graphene oxide mixed solution is freeze-dried to obtain a nickel-based composite powder.

[0025] Purified maltitol is prepared by nickel-based composite powder. The nickel catalyst in the nickel-based composite powder can convert maltose syrup into maltitol, and the alkaline graphene oxide can prevent the reaction of carboxylic acid by-products such as gluconic acid with the nickel catalyst, thereby reducing the catalytic activity and stability of the nickel catalyst. At the same time, the graphene oxide powder in the nickel-based composite powder can form a porous structure after freeze-drying, and its micropores allow small molecule maltitol to pass smoothly, while polysaccharide alcohols are blocked outside the micropores. The combined effect realizes the purification of maltitol and reduces the ash content in sucrose syrup by improving the purity of the raw materials.

[0026] As a preferred solution, the method for preparing the modified nanofiltration membrane comprises:

[0027] The PVDF microporous membrane is first soaked in 100-200 mL of a gallic acid solution with a mass concentration of 0.5-0.8% for 5-10 minutes to obtain a modified nanofiltration membrane.

[0028] The nanofiltration membrane is modified by gallic acid so that the modified nanofiltration membrane contains carboxyl groups, which can better adsorb particles and impurities in the syrup, thereby improving the light transmittance of the syrup.

[0029] The second aspect of the present invention provides an application of sucrose syrup prepared by the preparation process described in the first aspect in food and beverages.

[0030] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0031] 1. The present invention purifies L-arabinose, forms a stable complex containing a ring structure with a hydroxyboron-containing resin and impurities such as furfural in L-arabinose, removes the content of effective impurities such as furfural, reduces the risk of toxic side effects of impurities, removes mineral elements such as potassium, calcium, and magnesium in corn residues, and reduces the ash content in the final syrup by reducing the impurity content in the raw material components.

[0032] 2. The present invention purifies maltitol by adding nickel-based composite powder to play a dual role of catalysis and purification. On the one hand, the nickel catalyst in the nickel-based composite powder can convert maltose syrup into maltitol, and the alkaline graphene oxide can prevent the reaction of carboxylic acid byproducts such as gluconic acid with the nickel catalyst, thereby reducing the catalytic activity and stability of the nickel catalyst; on the other hand, the graphene oxide powder in the nickel-based composite powder can form a porous structure after freeze-drying, and its micropores can allow small molecule maltitol to pass smoothly, while polysaccharide alcohols are blocked outside the micropores. The combined effect realizes the purification of maltitol, and reduces the ash content in sucrose syrup by improving the purity of the raw materials.

[0033] 3. The present invention uses a modified nanofiltration membrane for impurity removal treatment. The nanofiltration membrane is modified by gallic acid and diethylenetriaminepentaacetic acid so that the modified nanofiltration membrane contains groups such as carboxyl and hydroxyl groups, which can better adsorb particles and impurities in the syrup, thereby improving the light transmittance of the syrup. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The sources of some components in the embodiments and comparative examples are as follows:

[0036] Sucrose, No. S112224, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0037] Commercially available L-arabinose, number A610071-0100, was purchased from Shanghai Sangon Biotechnology Co., Ltd.;

[0038] Commercially available maltitol, No. M464898, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0039] D-xylose, No. S11037-25g, purchased from Shanghai Yuanye Biotechnology Co., Ltd.;

[0040] Corn residue was purchased from Yantai Taoyang Agricultural Development Co., Ltd.;

[0041] Ethanol, food grade, was purchased from Jinan Lianshun Chemical Co., Ltd.;

[0042] Acetic acid was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0043] Arabinofuranosidase was purchased from Shanghai Yaji Biotechnology Co., Ltd.;

[0044] Maltose syrup, CAS No. 8002-48-0, purchased from Dongxiao Biotechnology Co., Ltd.;

[0045] Graphene oxide, model 102740, was purchased from Jiangsu Xianfeng Nanomaterials Technology;

[0046] Nickel catalyst, model RCZ-80-2, purchased from Jiangsu Rayni Metal Technology Co., Ltd.;

[0047] PVDF microporous membrane, purchased from Jiangsu Nantong Longjin Membrane Technology Co., Ltd.;

[0048] Gallic acid, CAS No. 149-91-7, was purchased from Shanghai Yuanye Biotechnology Co., Ltd.;

[0049] Diethylenetriaminepentaacetic acid, CAS No. 67-43-6, purchased from Aladdin Reagent Co., Ltd.;

[0050] Polyethyleneimine, CAS No. 9002-98-6, was purchased from Aladdin Reagent Co., Ltd.;

[0051] Trimesoyl chloride, CAS No. 4422-95-1, purchased from Aladdin Reagent Co., Ltd.;

[0052] n-Hexane, CAS No. 110-54-3, purchased from Aladdin Reagent Co., Ltd.;

[0053] Hydroxyl boron resin I and hydroxyl boron resin II were prepared according to the method described in "Research Progress in Synthesis and Preparation of Boron Phenolic Resin and Its Plastics [J]. Engineering Plastics Application, 2012, 40(9):5. Yang Ying, Wang Rumin, Wang Dejun."

[0054] Example 1

[0055] This embodiment provides a process for preparing sucrose syrup, comprising the following steps:

[0056] The preparation method of high-purity L-arabinose comprises: adding 200 parts of corn residues to 1200 parts of deionized water by weight, stirring at 110°C for 1 hour, centrifuging to obtain the supernatant after the stirring is completed, then adding 300 parts of ethanol to generate a precipitate, and filtering to obtain the precipitate; adding 30 parts of the precipitate to 60 parts of deionized water, stirring at 115°C for 1 hour, then adding 60 parts of deionized water, cooling to 55°C, adjusting the pH to 6.5 with acetic acid, stirring and acidifying for 4 hours; then adding 0.3 parts of arabinofuranosidase, stirring at 55°C for 8 hours, then removing impurities through a hydroxyboron resin (the mass ratio of hydroxyboron resin I to hydroxyboron resin II is 2:1), concentrating and crystallizing to obtain high-purity L-arabinose.

[0057] Preparation of purified maltitol: (1) By weight, add 15 parts of graphene oxide to 120 parts of deionized water, stir evenly, add 5 parts of sodium hydroxide solution with a mass concentration of 10%, 8 parts of nickel catalyst (model RCZ-80-2), and then ball-mill to obtain a nickel-graphene oxide mixed solution; freeze-dry the nickel-graphene oxide mixed solution to obtain a nickel-based composite powder. (2) By weight, add 600 mL of maltose syrup and 10 parts of nickel-based composite powder to a hydrogenation kettle, stir for 2 hours to obtain a reaction substrate; adjust the pH of the reaction substrate to 5.8, set the temperature of the reactor to 135°C and the pressure to 9.5 MPa, and react for 2 hours; after the reaction is completed, cool the reaction solution, sediment, and filter it in turn to obtain a maltitol solution, and concentrate and crystallize the maltitol solution to obtain purified maltitol.

[0058] Preparation of modified nanofiltration membrane: Based on parts by weight, a PVDF microporous membrane was first immersed in 200 mL of a gallic acid solution with a mass concentration of 0.5% for 10 minutes to obtain a modified nanofiltration membrane.

[0059] Step S1: 80 parts of sucrose, 15 parts of high-purity L-arabinose, 15 parts of purified maltitol and 5 parts of D-xylose were weighed in parts by weight and placed in a stirring tank, 250 parts of deionized water were added, and the mixture was stirred at 80° C. for 1 hour to obtain a mixed solution;

[0060] Step S2: removing impurities from the mixed solution in step S1 through a modified nanofiltration membrane to obtain a mixed solution after impurities removal;

[0061] Step S3: vacuum concentrate the impurity-removed mixed solution in step S2 to obtain sucrose syrup.

[0062] Example 2

[0063] This embodiment provides a process for preparing sucrose syrup, comprising the following steps:

[0064] The preparation method of high-purity L-arabinose comprises: adding 100 parts of corn residue to 1000 parts of deionized water by weight, stirring at 90°C for 3 hours, centrifuging to obtain the supernatant after the stirring is completed, then adding 200 parts of ethanol to generate a precipitate, and filtering to obtain the precipitate; adding 20 parts of the precipitate to 50 parts of deionized water, stirring at 95°C for 2 hours, then adding 50 parts of deionized water, cooling to 45°C, adjusting the pH to 5.5 with acetic acid, stirring and acidifying for 3 hours; then adding 0.2 parts of arabinofuranosidase, stirring at 45°C for 10 hours, then removing impurities through a hydroxy-boron resin (the mass ratio of hydroxy-boron resin I to hydroxy-boron resin II is 1:1), concentrating and crystallizing to obtain high-purity L-arabinose.

[0065] Preparation of purified maltitol: (1) By weight, add 10 parts of graphene oxide to 100 parts of deionized water, stir evenly, add 3 parts of sodium hydroxide solution with a mass concentration of 10%, 5 parts of nickel catalyst (model RCZ-80-2), and then ball-mill to obtain a nickel-graphene oxide mixed solution; freeze-dry the nickel-graphene oxide mixed solution to obtain a nickel-based composite powder. (2) By weight, add 500 mL of maltose syrup and 7 parts of nickel-based composite powder to a hydrogenation kettle, stir for 1 hour to obtain a reaction substrate; adjust the pH of the reaction substrate to 5.5, set the temperature of the reactor to 125°C and the pressure to 8.5 MPa, and react for 3 hours; after the reaction is completed, cool the reaction solution, sediment, and filter it in turn to obtain a maltitol solution, and concentrate and crystallize the maltitol solution to obtain purified maltitol.

[0066] Preparation of modified nanofiltration membrane: Based on parts by weight, a PVDF microporous membrane was first immersed in 100 mL of a gallic acid solution with a mass concentration of 0.8% for 5 minutes to obtain a modified nanofiltration membrane.

[0067] Step S1: weigh 60 parts of sucrose, 5 parts of high-purity L-arabinose, 5 parts of purified maltitol and 3 parts of D-xylose in parts by weight, put them in a stirring tank, add 200 parts of deionized water, stir at 80° C. for 1 hour, and obtain a mixed solution;

[0068] Step S2: removing impurities from the mixed solution in step S1 through a modified nanofiltration membrane to obtain a mixed solution after impurities removal;

[0069] Step S3: vacuum concentrate the impurity-removed mixed solution in step S2 to obtain sucrose syrup.

[0070] Example 3

[0071] This embodiment provides a process for preparing sucrose syrup, comprising the following steps:

[0072] The method for preparing high-purity L-arabinose comprises:

[0073] In parts by weight, 150 parts of corn residue are added to 1100 parts of deionized water, stirred at 100°C for 2 hours, centrifuged to obtain the supernatant after the stirring is completed, and then 250 parts of ethanol are added to generate a precipitate, which is filtered to obtain the precipitate; 28 parts of the precipitate are added to 56 parts of deionized water, stirred at 105°C for 2 hours, and then 58 parts of deionized water are added, cooled to 50°C, the pH is adjusted to 5.8 with acetic acid, and stirred for acidification for 4 hours; then 0.3 parts of arabinofuranosidase are added, stirred at 50°C for 9 hours, and then impurities are removed by hydroxyboron resin (the mass ratio of hydroxyboron resin I to hydroxyboron resin II is 1.5:1), and high-purity L-arabinose is obtained by concentration and crystallization.

[0074] Preparation of purified maltitol: (1) By weight, 12 parts of graphene oxide are added to 110 parts of deionized water, stirred evenly, and then 4 parts of sodium hydroxide solution with a mass concentration of 10% and 6 parts of nickel catalyst (model RCZ-80-2) are added and then ball-milled to obtain a nickel-graphene oxide mixed solution; the nickel-graphene oxide mixed solution is freeze-dried to obtain a nickel-based composite powder. (2) By weight, 550 mL of maltose syrup and 8 parts of nickel-based composite powder are added to a hydrogenation kettle, stirred for 2 hours to obtain a reaction substrate; the pH of the reaction substrate is adjusted to 5.5, the temperature of the reactor is set to 128°C and the pressure is set to 9.2MPa, and the reaction is carried out for 3.5 hours; after the reaction is completed, the reaction solution is subjected to cooling, sedimentation, and filtration in sequence to obtain a maltitol solution, and the maltitol solution is concentrated and crystallized to obtain purified maltitol.

[0075] Preparation of modified nanofiltration membrane: Based on parts by weight, a PVDF microporous membrane was first immersed in 180 mL of a gallic acid solution with a mass concentration of 0.6% for 8 minutes to obtain a modified nanofiltration membrane.

[0076] Step S1: weigh 70 parts of sucrose, 12 parts of high-purity L-arabinose, 8 parts of purified maltitol and 4 parts of D-xylose in parts by weight, put them in a stirring tank, add 220 parts of deionized water, stir at 75° C. for 2 hours, and obtain a mixed solution;

[0077] Step S2: removing impurities from the mixed solution in step S1 through a modified nanofiltration membrane to obtain a mixed solution after impurities removal;

[0078] Step S3: vacuum concentrate the impurity-removed mixed solution in step S2 to obtain sucrose syrup.

[0079] Comparative Example 1

[0080] This comparative example provides a preparation process of sucrose syrup. The difference between this comparative example and Example 1 is that commercially available L-arabinose is used instead of high-purity L-arabinose, commercially available maltitol is used instead of purified maltitol, and modified nanofiltration membrane is not used. The rest is the same as Example 1.

[0081] Comparative Example 2

[0082] This comparative example provides a process for preparing sucrose syrup. The difference between this comparative example and Example 1 is that commercially available maltitol is used instead of purified maltitol, and modified nanofiltration membrane is not used. The other differences are the same as Example 1.

[0083] Comparative Example 3

[0084] This comparative example provides a process for preparing sucrose syrup. The difference between this comparative example and Example 1 is that commercially available L-arabinose is used instead of high-purity L-arabinose, and PVDF microporous membrane is used instead of modified nanofiltration membrane. The rest is the same as Example 1.

[0085] Comparative Example 4

[0086] This comparative example provides a preparation process of sucrose syrup. The difference between this comparative example and Example 1 is that commercially available L-arabinose is used instead of high-purity L-arabinose, and commercially available maltitol is used instead of purified maltitol. The rest is the same as Example 1.

[0087] Comparative Example 5

[0088] This comparative example provides a process for preparing sucrose syrup. The difference between this comparative example and Example 1 is that a PVDF microporous membrane is used instead of a modified nanofiltration membrane, and the rest is the same as Example 1.

[0089] Comparative Example 6

[0090] This comparative example provides a preparation process of sucrose syrup. The difference between this comparative example and Example 1 is that commercially available maltitol is used instead of purified maltitol, and the rest is the same as Example 1.

[0091] Comparative Example 7

[0092] This comparative example provides a process for preparing sucrose syrup. The difference between this comparative example and Example 1 is that commercially available L-arabinose is used instead of high-purity L-arabinose, and the rest is the same as Example 1.

[0093] Performance Testing

[0094] The sucrose syrups prepared in the above examples and comparative examples were subjected to the following tests:

[0095] Ash content test: Test in accordance with the requirements of "QB / T 4093-2023".

[0096] Light transmittance test: Test in accordance with the requirements of GB / T 20882.4-2021.

[0097] Table 1 Performance test results

[0098] Ash content (%) Light transmittance (%) Example 1 0.0076 98.21 Example 2 0.0081 98.17 Example 3 0.0079 98.19 Comparative Example 1 0.0168 96.18 Comparative Example 2 0.0115 96.22 Comparative Example 3 0.0126 96.24 Comparative Example 4 0.0167 98.13 Comparative Example 5 0.0082 96.20 Comparative Example 6 0.0114 98.15 Comparative Example 7 0.0127 98.16

[0099] It can be seen from the above performance test results that the sucrose syrups of Examples 1-3 have good effects, especially Example 1 has the most outstanding comprehensive performance, with an ash content of 0.0076% and a transmittance of 98.21%. This is mainly because it uses high-purity L-arabinose and purified maltitol to improve the purity of the sucrose syrup raw material and reduce the impact of impurities. At the same time, a modified nanofiltration membrane is used to remove impurities from the syrup mixture, which effectively reduces the ash content of the sucrose syrup and improves the transmittance.

[0100] The comparative examples did not adopt the necessary technical solutions, resulting in that the corresponding performance tests were significantly worse than those of the embodiments. Compared with Example 1, in Comparative Example 1, commercially available L-arabinose was used to replace high-purity L-arabinose, commercially available maltitol was used to replace purified maltitol, and PVDF microporous membrane was used to replace modified nanofiltration membrane, so the ash content increased and the transmittance decreased; compared with Example 1, in Comparative Example 2, commercially available maltitol was used to replace purified maltitol, and PVDF microporous membrane was used to replace modified nanofiltration membrane, so the ash content increased and the transmittance decreased; compared with Example 1, in Comparative Example 3, commercially available L-arabinose was used to replace high-purity L -arabinose, using PVDF microporous membrane instead of modified nanofiltration membrane, the ash content increased and the transmittance decreased; compared with Example 1, Comparative Example 4 used commercially available L-arabinose instead of high-purity L-arabinose, and used commercially available maltitol instead of purified maltitol, the ash content increased; compared with Example 1, Comparative Example 5 used PVDF microporous membrane instead of modified nanofiltration membrane, the transmittance decreased; compared with Example 1, Comparative Example 6 used commercially available maltitol instead of purified maltitol, the ash content increased; compared with Example 1, Comparative Example 7 used commercially available L-arabinose instead of high-purity L-arabinose, the ash content increased. The above experimental results further prove the importance of the technical solution defined in the present invention for its technical effect.

[0101] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for preparing sucrose syrup, characterized in that: The steps include: Step S1: weighing 60-80 parts of sucrose, 5-15 parts of high-purity L-arabinose, 5-15 parts of maltitol and 3-5 parts of D-xylose in parts by weight and placing them in a stirring tank, adding 200-250 parts of deionized water, stirring at 70-80° C. for 1-2 hours to obtain a mixed solution; Step S2: removing impurities from the mixed solution in step S1 through a modified nanofiltration membrane to obtain a mixed solution after impurities removal; Step S3: vacuum concentrate the impurity-removed mixed solution in step S2 to obtain sucrose syrup.

2. A process for preparing sucrose syrup according to claim 1, characterized in that: The preparation method of high-purity L-arabinose comprises: In parts by weight, 100 to 200 parts of corn residue are added to 1000 to 1200 parts of deionized water, stirred at 90 to 110° C. for 1 to 3 hours, centrifuged to obtain the supernatant after the stirring is completed, and then 200 to 300 parts of ethanol are added to generate a precipitate, which is filtered to obtain the precipitate; 20 to 30 parts of the precipitate are added to 50 to 60 parts of deionized water, stirred at 95 to 115° C. for 1 to 2 hours, and then 50 to 60 parts of deionized water are added, the temperature is lowered to 45 to 55° C., the pH is adjusted to 5.5 to 6.5 with acetic acid, and stirred for acidification for 3 to 4 hours; then 0.2 to 0.3 parts of arabinofuranosidase are added, stirred at 45 to 55° C. for 8 to 10 hours, and then impurities are removed by hydroxyboron resin, and high-purity L-arabinose is obtained by concentration and crystallization.

3. A process for preparing sucrose syrup according to claim 2, characterized in that: The hydroxyl boron resins are hydroxyl boron resin I and hydroxyl boron resin II.

4. A process for preparing sucrose syrup according to claim 3, characterized in that: The structural formula of the hydroxyl boron resin I is: In the hydroxyl boron resin I, n is selected from an integer ranging from 10 to 30; The structural formula of the hydroxyl boron resin II is: In the hydroxyl boron resin II, n is selected from an integer ranging from 10 to 20.

5. The process for preparing sucrose syrup according to claim 3, characterized in that: The mass ratio of hydroxyl boron resin I to hydroxyl boron resin II is (1-2):

1.

6. The process for preparing sucrose syrup according to claim 1, characterized in that: The maltitol is purified maltitol.

7. A process for preparing sucrose syrup according to claim 6, characterized in that: The preparation method of the purified maltitol comprises: In parts by weight, 500-600 mL of maltose syrup and 7-10 parts of nickel-based composite powder are added to a hydrogenation kettle, and stirred for 1-2 hours to obtain a reaction substrate; the pH of the reaction substrate is adjusted to 5.5-5.8, the temperature of the reactor is set to 125-135° C., and the pressure is set to 8.5-9.5 MPa, and the reaction is carried out for 2-3 hours; after the reaction is completed, the reaction solution is subjected to cooling, sedimentation, and filtering treatments in sequence to obtain a maltitol solution, and the maltitol solution is concentrated and crystallized to obtain purified maltitol.

8. The process for preparing sucrose syrup according to claim 7, characterized in that: The preparation method of the nickel-based composite powder comprises: In parts by weight, 10 to 15 parts of graphene oxide are added to 100 to 120 parts of deionized water, and after being stirred evenly, 3 to 5 parts of a sodium hydroxide solution with a mass concentration of 10% and 5 to 8 parts of a nickel catalyst are added, followed by ball milling to obtain a nickel-graphene oxide mixed solution; the nickel-graphene oxide mixed solution is freeze-dried to obtain a nickel-based composite powder.

9. The process for preparing sucrose syrup according to claim 1, characterized in that: The preparation method of the modified nanofiltration membrane comprises: The PVDF microporous membrane is first soaked in 100-200 mL of a gallic acid solution with a mass concentration of 0.5-0.8% for 5-10 minutes to obtain a modified nanofiltration membrane.

10. Use of the sucrose syrup prepared by the preparation process according to any one of claims 1 to 9 in food and beverages.

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