CN111533817A - Production process of hydroxypropyl distarch phosphate - Google Patents
Production process of hydroxypropyl distarch phosphate Download PDFInfo
- Publication number
- CN111533817A CN111533817A CN202010570882.0A CN202010570882A CN111533817A CN 111533817 A CN111533817 A CN 111533817A CN 202010570882 A CN202010570882 A CN 202010570882A CN 111533817 A CN111533817 A CN 111533817A
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- CN
- China
- Prior art keywords
- starch
- distarch phosphate
- hydroxypropyl distarch
- production process
- hydroxide solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/16—Ether-esters
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
- A23C9/13—Fermented milk preparations; Treatment using microorganisms or enzymes using additives
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
- A23C9/13—Fermented milk preparations; Treatment using microorganisms or enzymes using additives
- A23C9/137—Thickening substances
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L27/00—Spices; Flavouring agents or condiments; Artificial sweetening agents; Table salts; Dietetic salt substitutes; Preparation or treatment thereof
- A23L27/60—Salad dressings; Mayonnaise; Ketchup
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/20—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents
- A23L29/206—Foods or foodstuffs containing additives; Preparation or treatment thereof containing gelling or thickening agents of vegetable origin
- A23L29/212—Starch; Modified starch; Starch derivatives, e.g. esters or ethers
- A23L29/219—Chemically modified starch; Reaction or complexation products of starch with other chemicals
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/30—Foods or foodstuffs containing additives; Preparation or treatment thereof containing carbohydrate syrups; containing sugars; containing sugar alcohols, e.g. xylitol; containing starch hydrolysates, e.g. dextrin
Abstract
The invention discloses a production process of hydroxypropyl distarch phosphate, which comprises the following steps: (1) mixing raw starch and water to prepare starch milk; (2) adding or dropping a potassium hydroxide solution into the starch milk obtained in the step (1) in a flowing manner to adjust the pH value; (3) adding propylene oxide, and reacting for 18-22 h at 40-45 ℃; (4) and adding sodium trimetaphosphate or phosphorus oxychloride to react for 3-8 h, washing, dehydrating and drying to obtain the hydroxypropyl distarch phosphate. The production process of the hydroxypropyl distarch phosphate utilizes the potassium hydroxide solution to adjust the pH value of a reaction system, does not need to add sodium sulfate, sodium chloride and other salts as swelling inhibitors, and solves the technical problem of production of a large amount of high-salt wastewater which is difficult to treat in a washing procedure.
Description
Technical Field
The invention relates to a preparation method of modified starch, in particular to a production process of hydroxypropyl distarch phosphate.
Background
Hydroxypropyl distarch phosphate is a product obtained by reacting raw material starch with crosslinking agents such as propylene oxide, sodium trimetaphosphate or phosphorus oxychloride and the like under an alkaline condition. The medium for producing the hydroxypropyl distarch phosphate comprises alcohol water solution, alcohol solution and water solution. The alcohol aqueous solution and the alcohol are used as media, the requirements on production equipment and reaction conditions are high, industrialization is not easy to realize, and potential safety hazards exist for factories due to storage of the alcohol. The alkaline catalyst commonly used in the production of hydroxypropyl distarch phosphate with water as the medium is sodium hydroxide. Sodium hydroxide solution with certain concentration is added to adjust the pH value of the reaction system, starch granules expand (are gelatinized after being seriously expanded) along with the rise of the pH value, the consistency of starch milk of the reaction system is increased, subsequent processes of starch reaction, washing, dehydration and the like are influenced, and the product quality is reduced. In order to prevent swelling and gelatinization of starch, a certain amount of salt (sodium sulfate or sodium chloride) is generally added as a swelling inhibitor, and the amount of the salt itself is adjusted according to the amount of propylene oxide added without participating in the reaction. Sodium sulfate is added under normal conditions to be 8-30% of the weight of starch. In the washing process, water which is 6-10 times of the weight of starch needs to be consumed for cleaning sodium sulfate, a large amount of high-salt water which is difficult to treat is generated, if the high-salt water is discharged into a sewage pipe, the high-salt water cannot be treated by an anaerobic process, only a high-cost aerobic aeration mode can be adopted for treatment, the treatment difficulty is high, and the equipment investment cost is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a production process of hydroxypropyl distarch phosphate.
In order to achieve the purpose, the invention adopts the technical scheme that: a production process of hydroxypropyl distarch phosphate comprises the following steps:
(1) mixing raw starch and water to prepare starch milk;
(2) adding or dropping a potassium hydroxide solution into the starch milk obtained in the step (1) in a flowing manner to adjust the pH value to 10-14;
(3) adding propylene oxide, and reacting for 18-22 h at 40-45 ℃;
(4) and adding sodium trimetaphosphate or phosphorus oxychloride to react for 3-8 h, washing, dehydrating and drying to obtain the hydroxypropyl distarch phosphate.
The production process of the hydroxypropyl distarch phosphate utilizes the mode of feeding or dripping the potassium hydroxide solution to adjust the pH of a reaction system, does not need to add salts such as sodium sulfate, sodium chloride and the like as swelling inhibitors, and solves the production technical problem that a large amount of high-salt wastewater which is difficult to treat is generated in a washing procedure.
In the step (1), the starch milk represents a mixture of raw starch and water.
Preferably, in the step (1), the mass concentration of the starch milk is 30-40%, and the reaction efficiency of the system and the stability of the reaction process can be effectively controlled by controlling the starch milk to be the concentration.
Preferably, in step (2), the potassium hydroxide solution is added for at least 3 hours.
Preferably, in the step (2), the adding time of the potassium hydroxide solution is 3-5 h. The inventors found that when the addition time of the potassium hydroxide solution is less than 3 hours, there is a certain degree of swelling, and when the addition time is extended to at least 3 hours, the swelling of starch can be suppressed, but the addition time is too long, which tends to result in low production efficiency.
Preferably, the mass concentration of the potassium hydroxide solution is 3-9%. The amount of potassium hydroxide to be added is determined by the pH of the reaction system, and in order to control the time of addition, it is preferable to use a potassium hydroxide solution having the above-mentioned mass concentration.
Preferably, in the step (4), the pH value after adding sodium trimetaphosphate or phosphorus oxychloride and reacting for 3-8 h is 3-5.
Preferably, in the step (3), the addition amount of the propylene oxide is 3-10% of the mass of the starch.
Preferably, the native starch is at least one of tapioca starch, waxy corn starch, and potato starch, but is not limited to the above species.
The invention has the beneficial effects that: the invention provides a production process of hydroxypropyl distarch phosphate, which adjusts the pH of a reaction system by using a mode of feeding or dripping a potassium hydroxide solution without adding salts such as sodium sulfate, sodium chloride and the like as swelling inhibitors, and solves the production technical problem that a large amount of high-salt wastewater which is difficult to treat is generated in a washing procedure. Meanwhile, the hydroxypropyl distarch phosphate product obtained by the preparation process has the characteristics of moderate viscosity, strong water retention capacity, acid and alkali resistance, mechanical processing resistance, smooth mouthfeel and the like, and conforms to the GB29931-2013 standard; the modified starch prepared by the process can be applied to foods such as yoghourt and sauce, and has the effects of thickening, water retention and freeze-thaw resistance.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
In an embodiment of the production process of hydroxypropyl distarch phosphate, the production process of hydroxypropyl distarch phosphate in this embodiment includes the following steps:
weighing 5kg of waxy corn starch (with the water content of 13 percent), preparing starch milk with the mass concentration of 35 percent, detecting the initial pH value and baume degree, adding a potassium hydroxide solution with the mass concentration of 5 percent in 5 hours to ensure that the pH value of the starch milk is 12, adding propylene oxide with the mass of 8 percent of the starch, heating to 45 ℃, carrying out heat preservation reaction for 22 hours, adding sodium trimetaphosphate with the mass of 0.05 percent of the starch, carrying out crosslinking reaction for 4 hours, neutralizing the pH value to 5.0, washing with water with the weight of 1 time of the starch, dehydrating, drying, packaging to obtain hydroxypropyl distarch phosphate, and carrying out index detection on the product.
Example 2
In an embodiment of the production process of hydroxypropyl distarch phosphate, the production process of hydroxypropyl distarch phosphate in this embodiment includes the following steps:
weighing 5kg of waxy corn starch (with the water content of 13 percent), preparing starch milk with the mass concentration of 35 percent, detecting the initial pH value and baume degree, adding 7 percent potassium hydroxide solution in 4 hours to ensure that the pH value of the starch milk is 12, adding 8 percent propylene oxide in mass percent of the starch, heating to 45 ℃, carrying out heat preservation reaction for 22 hours, adding 0.05 percent sodium trimetaphosphate in mass percent of the starch, then carrying out crosslinking reaction for 4 hours, neutralizing the pH value to 5.0, washing with 1 time of water in weight of the starch, dehydrating, drying, packaging to obtain hydroxypropyl distarch phosphate, and carrying out index detection on the product.
Example 3
In an embodiment of the production process of hydroxypropyl distarch phosphate, the production process of hydroxypropyl distarch phosphate in this embodiment includes the following steps:
weighing 5kg of waxy corn starch (with the water content of 13 percent), preparing starch milk with the mass concentration of 35 percent, detecting the initial pH value and baume degree, adding a potassium hydroxide solution with the mass concentration of 9 percent in 3 hours to ensure that the pH value of the starch milk is 12, adding propylene oxide with the mass concentration of 8 percent of the starch, heating to 45 ℃, carrying out heat preservation reaction for 22 hours, adding sodium trimetaphosphate with the mass of 0.05 percent of the starch, carrying out crosslinking reaction for 4 hours, neutralizing the pH value to 5.0, washing with water with the weight of 1 time of the starch, dehydrating, drying, packaging to obtain hydroxypropyl distarch phosphate, and carrying out index detection on the product.
Comparative example 1
The production process of the hydroxypropyl distarch phosphate of the invention is a comparative example, and comprises the following steps:
weighing 5kg waxy corn starch (with water content of 13%), preparing into starch milk with mass concentration of 35%, detecting initial pH value and Baume degree, and adding 5% sodium hydroxide dilute solution within 5h to make pH of the starch milk be 12. Because the starch is gelatinized in the process of adding the sodium hydroxide solution into the flow, the gelatinized starch cannot be subjected to etherification reaction of propylene oxide.
Comparative example 2
The production process of the hydroxypropyl distarch phosphate of the invention is a comparative example, and comprises the following steps:
weighing 5kg of waxy corn starch (with the water content of 13%), adding 1.0kg of sodium sulfate, adding water to prepare 35% starch milk with the mass concentration, detecting the initial pH value and baume degree, adding a certain amount of 4% sodium hydroxide dilute solution in 5h to ensure that the pH of the starch milk is 12, adding 8% propylene oxide by mass of the starch, heating to 45 ℃, performing heat preservation reaction for 22h, adding 0.05% sodium trimetaphosphate by mass of the starch, performing crosslinking reaction for 4h, neutralizing the pH to 5.0, washing with water 8 times the weight of the starch, dehydrating, drying, packaging to obtain hydroxypropyl distarch phosphate, and performing index detection on the product.
Example 4
In order to investigate the effect of the feeding time of the potassium hydroxide solution on the degree of swelling, the feeding time of the potassium hydroxide solution was varied in example 1, and the relationship between the degree of swelling and the feeding time of the potassium hydroxide solution is shown in Table 1.
TABLE 1
As can be seen from Table 1, when the feeding time of the potassium hydroxide solution is not less than 3 hours, the swelling degree can be effectively reduced, but the production efficiency is low after the feeding time is more than 5 hours, and the effect of suppressing swelling can be achieved by adding the swelling inhibitor when the sodium hydroxide solution is added.
The hydroxypropyl distarch phosphates prepared in examples 1-3 and comparative examples 1-2 were tested for peak viscosity, hydroxypropyl content and conductivity, wherein the peak viscosity was measured using a brabender viscometer and the results are shown in table 2.
TABLE 2
As can be seen from Table 2, the hydroxypropyl distarch phosphate of the invention adopts the fed-batch potassium hydroxide solution to adjust the pH value, the swelling inhibitor is not needed, the gelatinization phenomenon is not generated, and the generated wastewater is far lower than that of the comparative example 2. The hydroxypropyl distarch phosphate product obtained by the preparation process of the embodiments 1-3 has the characteristics of moderate viscosity (500-1000BU), strong water retention capacity, acid and alkali resistance, machining resistance, smooth mouthfeel and the like, and meets the GB29931-2013 standard. The modified starch prepared by the process can be applied to foods such as yoghourt and sauce, and has the effects of thickening, water retention and freeze-thaw resistance.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The production process of the hydroxypropyl distarch phosphate is characterized by comprising the following steps:
(1) mixing raw starch and water to prepare starch milk;
(2) adding or dropping a potassium hydroxide solution into the starch milk obtained in the step (1) in a flowing manner to adjust the pH value to 10-14;
(3) adding propylene oxide, and reacting for 18-22 h at 40-45 ℃;
(4) and adding sodium trimetaphosphate or phosphorus oxychloride to react for 3-8 h, washing, dehydrating and drying to obtain the hydroxypropyl distarch phosphate.
2. The production process of hydroxypropyl distarch phosphate according to claim 1, wherein in step (1), the mass concentration of the starch milk is 30-40%.
3. The process for producing hydroxypropyl distarch phosphate according to claim 1, wherein the potassium hydroxide solution is added in step (2) for a period of at least 3 hours.
4. The production process of hydroxypropyl distarch phosphate according to claim 1, wherein in step (2), the addition time of the potassium hydroxide solution is 3-5 h.
5. The production process of hydroxypropyl distarch phosphate according to claim 1, wherein in step (2), the mass concentration of the potassium hydroxide solution is 3-9%.
6. The production process of hydroxypropyl distarch phosphate according to claim 1, wherein in step (3), the amount of propylene oxide added is 3-10% by mass of the starch.
7. The production process of hydroxypropyl distarch phosphate as claimed in claim 1, wherein in step (4), the pH value after adding sodium trimetaphosphate or phosphorus oxychloride and reacting for 3-8 h is 3-5.
8. The process for producing hydroxypropyl distarch phosphate according to claim 1, wherein the native starch is at least one of tapioca starch, waxy corn starch and potato starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570882.0A CN111533817A (en) | 2020-06-19 | 2020-06-19 | Production process of hydroxypropyl distarch phosphate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010570882.0A CN111533817A (en) | 2020-06-19 | 2020-06-19 | Production process of hydroxypropyl distarch phosphate |
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| CN202010570882.0A Pending CN111533817A (en) | 2020-06-19 | 2020-06-19 | Production process of hydroxypropyl distarch phosphate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429909A (en) * | 2020-11-17 | 2021-09-24 | 江门市蓝羽建筑粘合剂实业有限公司 | Alkali-gelatinized wet glue and preparation method and application thereof |
| CN114317635A (en) * | 2021-12-30 | 2022-04-12 | 保龄宝生物股份有限公司 | Method for preparing low-density digestion-resistant starch |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826619A (en) * | 1987-12-03 | 1989-05-02 | A. E. Staley Manufacturing Company | Starch slurries with concentrated aqueous alkaline solutions |
| CN1903886A (en) * | 2005-07-28 | 2007-01-31 | 四平帝达变性淀粉有限公司 | Preparation method of high substituting degree hydroxy propyl distarch phosphate |
| KR100893571B1 (en) * | 2008-07-23 | 2009-04-17 | 경희대학교 산학협력단 | Method for preparing cross-linked starch using ultra high pressure |
| CN103421124A (en) * | 2013-08-30 | 2013-12-04 | 华南理工大学 | High-substitution-degree quaternary ammonium type cationic sticky rice starch and manufacturing method thereof |
| CN103865108A (en) * | 2014-03-28 | 2014-06-18 | 甘肃丰收农业科技有限公司 | Preparation method of composite modified starch |
| CN104497152A (en) * | 2014-11-24 | 2015-04-08 | 广东中轻枫泰生化科技有限公司 | Preparation method of cationic starch with high substituted degree |
| CN104974381A (en) * | 2014-04-08 | 2015-10-14 | 上海耐特复合材料制品有限公司 | Starch-based biodegradable composite material and preparation method thereof |
| CN106496653A (en) * | 2016-11-28 | 2017-03-15 | 青岛中科星淀新材料科技有限公司 | A kind of preparation method of hydroxypropul starch/sodium alginate composite membrane |
-
2020
- 2020-06-19 CN CN202010570882.0A patent/CN111533817A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826619A (en) * | 1987-12-03 | 1989-05-02 | A. E. Staley Manufacturing Company | Starch slurries with concentrated aqueous alkaline solutions |
| CN1903886A (en) * | 2005-07-28 | 2007-01-31 | 四平帝达变性淀粉有限公司 | Preparation method of high substituting degree hydroxy propyl distarch phosphate |
| KR100893571B1 (en) * | 2008-07-23 | 2009-04-17 | 경희대학교 산학협력단 | Method for preparing cross-linked starch using ultra high pressure |
| CN103421124A (en) * | 2013-08-30 | 2013-12-04 | 华南理工大学 | High-substitution-degree quaternary ammonium type cationic sticky rice starch and manufacturing method thereof |
| CN103865108A (en) * | 2014-03-28 | 2014-06-18 | 甘肃丰收农业科技有限公司 | Preparation method of composite modified starch |
| CN104974381A (en) * | 2014-04-08 | 2015-10-14 | 上海耐特复合材料制品有限公司 | Starch-based biodegradable composite material and preparation method thereof |
| CN104497152A (en) * | 2014-11-24 | 2015-04-08 | 广东中轻枫泰生化科技有限公司 | Preparation method of cationic starch with high substituted degree |
| CN106496653A (en) * | 2016-11-28 | 2017-03-15 | 青岛中科星淀新材料科技有限公司 | A kind of preparation method of hydroxypropul starch/sodium alginate composite membrane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429909A (en) * | 2020-11-17 | 2021-09-24 | 江门市蓝羽建筑粘合剂实业有限公司 | Alkali-gelatinized wet glue and preparation method and application thereof |
| CN114317635A (en) * | 2021-12-30 | 2022-04-12 | 保龄宝生物股份有限公司 | Method for preparing low-density digestion-resistant starch |
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