CN109400729A - A method of oxidized starch is prepared using composite oxidant - Google Patents
A method of oxidized starch is prepared using composite oxidant Download PDFInfo
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- CN109400729A CN109400729A CN201811463583.6A CN201811463583A CN109400729A CN 109400729 A CN109400729 A CN 109400729A CN 201811463583 A CN201811463583 A CN 201811463583A CN 109400729 A CN109400729 A CN 109400729A
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- starch
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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
- C08B31/18—Oxidised starch
Abstract
The invention discloses a kind of methods for preparing oxidized starch using composite oxidant, are related to Starch Production field, and mainly solving the problems, such as oxidant used in conventional oxidation Starch Production, there are various drawbacks；Method includes the following steps: 1) be uniformly mixed hydrogen peroxide and persulfate solution, it is spare that hybrid oxidant is made；2) catalyst is added in the corn starch milk for being 38% in reactor tank compound concentration；3) hybrid oxidant is added in reactor tank, then adjusts the pH value of starch milk；4) after oxidation reaction sample detection oxidized starch viscosity index；5) it is detected with potassium iodide starch paper, after starch milk is without reproducibility, adjusts pH value, obtain oxidized starch；6) oxidized starch is dehydrated, dried, packed to get oxidation.The present invention uses hybrid oxidant, and performance is stablized, is not easily decomposed, and reduce the usage amount of hydrogen peroxide compared with original process, further improves reaction efficiency, shorten the reaction time.
Description
Technical field
The present invention relates to starch manufacture field, specifically a kind of method for preparing oxidized starch using composite oxidant.
Background technique
Oxidized starch is that starch acts in acid, alkali, neutral medium with oxidant, makes a kind of change obtained from starch oxidation
Property starch.Oxidized starch reduces starch gelatinization temperature, and heat paste viscosity becomes smaller and thermal stability increases, and product colour is pure white, paste
Transparent, good film-forming property, freeze-thaw resistance is good, is the thickener of low viscosity high concentration, is widely used in weaving, papermaking, food and essence
Thin chemical industry.
Production oxidized starch mainly uses sodium hypochlorite and hydrogen peroxide oxidant in industry at present, wherein hypochlorous acid
The oxidized starch properties of product that sodium process conditions obtain are preferable, but exist simultaneously technique and generate that waste water is more, chloride ion content height, ring
The disadvantages of border is seriously polluted, sewage treatment expense is higher, these problems constrain the yield and use of hypochlorite oxidation starch；
In comparison, hydrogen peroxide oxidation starch using relatively broad, the discharge of sewage can be greatly reduced using hydrogen peroxide,
But also reduce product paste liquid transparency and application performance.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for preparing oxidized starch using composite oxidant, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the invention provides the following technical scheme:
A method of oxidized starch is prepared using composite oxidant, comprising the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% persulfate solution 3:1-5:1 is uniformly mixed by volume, system
It is spare at hybrid oxidant；
2) cornstarch and water are added in reactor tank, the corn starch milk that compound concentration is 38% is added and forms sediment after mixing evenly
The catalyst of silty amount 0.01%-0.1%
3) hybrid oxidant that quality is cornstarch dry weight 2% is added in reactor tank, is then slowly added mass fraction 5%
Sodium peroxide solution adjusts the pH value of starch milk to 7.0-9.0；
4) temperature in reactor tank is risen to 45-55 DEG C, sample detection aoxidizes after then heat preservation carries out oxidation reaction 1.2-1.7h
The viscosity index of starch, after detection is qualified, the reducing agent that same oxidant quality is added stops reaction, while will be warm in reactor tank
Degree is down to 32-38 DEG C；
5) with potassium iodide starch paper detection starch milk without reproducibility after, be added mass fraction 5% hydrochloric acid solution, adjust pH value to
5.5-6.5, and 1h is maintained, obtain oxidized starch solution；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
As a further solution of the present invention: the persulfate solution be potassium persulfate solution, sodium peroxydisulfate solution and
One of ammonium persulfate solution is a variety of.
As a further solution of the present invention: the persulfate solution is mixed by potassium persulfate solution and sodium peroxydisulfate solution
It closes.
As further scheme of the invention: the catalyst is Fe0.6Zr0.4O2。
As further scheme of the invention: the reducing agent is the sodium metabisulfite solution of mass fraction 10%.
Compared with prior art, the beneficial effects of the present invention are:
The present invention uses hybrid oxidant, and performance is stablized, is not easily decomposed, and reduce the usage amount of hydrogen peroxide compared with original process,
Reaction efficiency is further improved, the reaction time is shortened；Quantity of wastewater effluent is reduced, the chloride ion in sewage is eliminated, is dropped
Low processing difficulty and environmental protection pressure, integrally reduce processing cost；And the oxidized starch finished product stability produced is good, pastes liquid
Light transmittance is higher, meets the requirement of surface sizing technique.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Improvement of the invention is to select hydrogen peroxide as primary oxidizers, then is proportionally added into promotor persulfate
Solution is configured to composite oxidant, is effectively facilitated the progress of oxidation reaction, and reaction mechanism is hydrogen peroxide in catalyst action
Then lower initiation, increased activity carry out the reaction of hydroxyl radical free radical and starch, simultaneously because hydrogen ion is to promotor in aqueous solution
Middle pyrolysis also plays catalytic action, and when hydrogen ion concentration is larger, the decomposition of promotor also can comparatively fast generate more work
Property oxygen, so that the oxidability of hydrogen peroxide is also most strong.In this way, not only having reduced the usage amount of hydrogen peroxide, but also can be met the requirements
Oxidized starch product.
Embodiment 1
A method of oxidized starch is prepared using composite oxidant, comprising the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% potassium persulfate solution 3:1 is uniformly mixed by volume, be made mixed
It is spare to close oxidizing agent solution；
2) 5000g cornstarch is added in reactor tank, water is added to be configured to the corn starch milk that concentration is 38%, after mixing evenly,
The Fe of 0.5g is added0.6Zr0.4O2；
3) 100g mixed oxidization agent solution is added into reactor tank, is then slowly added the sodium peroxide solution tune of mass fraction 5%
The pH value of starch milk is saved to 7.0；
4) temperature in reactor tank is risen to 45 DEG C, then heat preservation carries out the viscous of sample detection oxidized starch after oxidation reaction 1.2h
Index is spent, the sodium metabisulfite solution that 100g mass concentration 10% is added after detection is qualified stops reaction, while will be warm in reactor tank
Degree is down to 32 DEG C；
5) after with potassium iodide starch paper detection starch milk without reproducibility, the hydrochloric acid solution of mass fraction 5% is added, adjusts pH value to 5.5
And 1h is maintained, obtain oxidized starch solution；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
Embodiment 2
A method of oxidized starch is prepared using composite oxidant, comprising the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% sodium peroxydisulfate solution 4:1 is uniformly mixed by volume, be made mixed
It is spare to close oxidant；
2) 5000g cornstarch is added in reactor tank, adds water to be configured to the corn starch milk that concentration is 38%, after mixing evenly
The Fe of starch slurry quality 5g is added0.6Zr0.4O2；
3) 100g mixed oxidization agent solution is added into reactor tank, is then slowly added the sodium peroxide solution tune of mass fraction 5%
The pH value of starch milk is saved to 7.8；
4) temperature in reactor tank is risen to 50 DEG C, then heat preservation carries out the viscous of sample detection oxidized starch after oxidation reaction 1.5h
Index is spent, the sodium metabisulfite solution that 100g mass concentration 10% is added after detection is qualified stops reaction, while will be warm in reactor tank
Degree is down to 36 DEG C；
5) with potassium iodide starch paper detection starch milk without after reproducibility be added mass fraction 5% hydrochloric acid solution adjust pH value to 6.2 simultaneously
1h is maintained, oxidized starch solution is obtained；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
Embodiment 3
A method of oxidized starch is prepared using composite oxidant, comprising the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% persulfate mixed solution 3.5:1 is uniformly mixed by volume,
It is spare that hybrid oxidant is made；
2) 5000g cornstarch is added in reactor tank, water is added to be configured to the corn starch milk that concentration is 38%, after mixing evenly,
The Fe of 0.5g is added0.6Zr0.4O2；
3) 100g mixed oxidization agent solution is added into reactor tank, is then slowly added the sodium peroxide solution tune of mass fraction 5%
The pH value of starch milk is saved to 8.5；
4) temperature in reactor tank is risen to 45 DEG C, then heat preservation carries out the viscous of sample detection oxidized starch after oxidation reaction 1.6h
Index is spent, the sodium metabisulfite solution that 100g mass concentration 10% is added after detection is qualified stops reaction, while will be warm in reactor tank
Degree is down to 38 DEG C；
5) after with potassium iodide starch paper detection starch milk without reproducibility, the hydrochloric acid solution of mass fraction 5% is added, adjusts pH value to 6.0
And 1h is maintained, obtain oxidized starch solution；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
Embodiment 4
A method of oxidized starch is prepared using composite oxidant, comprising the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% persulfate solution 5:1 is uniformly mixed by volume, be made mixed
It is spare to close oxidant；
2) 5000g cornstarch is added in reactor tank, water is added to be configured to the corn starch milk that concentration is 38%, after mixing evenly,
The Fe of 0.6g is added0.6Zr0.4O2；
3) 100g mixed oxidization agent solution is added into reactor tank, is then slowly added the sodium peroxide solution tune of mass fraction 5%
The pH value of starch milk is saved to 9；
4) temperature in reactor tank is risen to 55 DEG C, then heat preservation carries out the viscous of sample detection oxidized starch after oxidation reaction 1.7h
Index is spent, the sodium metabisulfite solution that 100g mass concentration 10% is added after detection is qualified stops reaction, while will be warm in reactor tank
Degree is down to 38 DEG C；
5) after with potassium iodide starch paper detection starch milk without reproducibility, the hydrochloric acid solution of mass fraction 5% is added, adjusts pH value to 6.5
And 1h is maintained, obtain oxidized starch solution；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of method for preparing oxidized starch using composite oxidant, which comprises the following steps:
1) by concentration be 35% hydrogen peroxide and concentration be 30% persulfate solution 3:1-5:1 is uniformly mixed by volume, system
It is spare at hybrid oxidant；
2) cornstarch and water are added in reactor tank, the corn starch milk that compound concentration is 38% is stirring evenly and then adding into starch
The catalyst of quality 0.01%-0.1%；
3) hybrid oxidant that quality is cornstarch dry weight 2% is added in reactor tank, is then slowly added mass fraction 5%
Sodium peroxide solution adjusts the pH value of starch milk to 7.0-9.0；
4) temperature in reactor tank is risen to 45-55 DEG C, sample detection aoxidizes after then heat preservation carries out oxidation reaction 1.2-1.7h
The viscosity index of starch, after detection is qualified, the reducing agent that same oxidant quality is added stops reaction, while will be warm in reactor tank
Degree is down to 32-38 DEG C；
5) with potassium iodide starch paper detection starch milk without reproducibility after, be added mass fraction 5% hydrochloric acid solution, adjust pH value to
5.5-6.5, and 1h is maintained, obtain oxidized starch solution；
6) oxidized starch solution be dehydrated, dried, packed and get product oxidized starch.
2. the method according to claim 1 for preparing oxidized starch using composite oxidant, it is characterised in that: step 1) institute
Stating persulfate solution is one of potassium persulfate solution, sodium peroxydisulfate solution and ammonium persulfate solution or a variety of.
3. the method according to claim 2 for preparing oxidized starch using composite oxidant, it is characterised in that: the over cure
The preferred potassium persulfate solution of acid salt solution and sodium peroxydisulfate solution mixed solution.
4. the method according to claim 1 for preparing oxidized starch using composite oxidant, which is characterized in that step 2 institute
Stating catalyst is Fe0.6Zr0.4O2。
5. the method according to claim 1 for preparing oxidized starch using composite oxidant, it is characterised in that: step 4) institute
State the sodium metabisulfite solution that reducing agent is mass fraction 10%.
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Citations (5)
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|---|---|---|---|---|
| CN102787529A (en) * | 2011-05-18 | 2012-11-21 | 永港伟方（北京）科技股份有限公司 | Preparation method of starch adhesive for papermaking coating, its product, and application of product |
| CN105566571A (en) * | 2016-02-17 | 2016-05-11 | 常州市庆发工业气体有限公司 | Preparation method of pre-crosslinked starch-based low-residue thickening agent |
| CN107739354A (en) * | 2017-10-09 | 2018-02-27 | 中国科学院过程工程研究所 | The method that one pot of one-step method is prepared 2,5 furandicarboxylic acids by fructose |
| CN108314667A (en) * | 2017-01-18 | 2018-07-24 | 中国科学院过程工程研究所 | A kind of preparation method of non-alkali systems biology base 2,5- furandicarboxylic acids |
| CN108659751A (en) * | 2018-06-05 | 2018-10-16 | 佛山皖阳生物科技有限公司 | A kind of preparation method of modified corn starch adhesive |
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2018
- 2018-12-03 CN CN201811463583.6A patent/CN109400729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787529A (en) * | 2011-05-18 | 2012-11-21 | 永港伟方（北京）科技股份有限公司 | Preparation method of starch adhesive for papermaking coating, its product, and application of product |
| CN105566571A (en) * | 2016-02-17 | 2016-05-11 | 常州市庆发工业气体有限公司 | Preparation method of pre-crosslinked starch-based low-residue thickening agent |
| CN108314667A (en) * | 2017-01-18 | 2018-07-24 | 中国科学院过程工程研究所 | A kind of preparation method of non-alkali systems biology base 2,5- furandicarboxylic acids |
| CN107739354A (en) * | 2017-10-09 | 2018-02-27 | 中国科学院过程工程研究所 | The method that one pot of one-step method is prepared 2,5 furandicarboxylic acids by fructose |
| CN108659751A (en) * | 2018-06-05 | 2018-10-16 | 佛山皖阳生物科技有限公司 | A kind of preparation method of modified corn starch adhesive |
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| DONGXIA YAN 等: "Fe–Zr–O catalyzed base-free aerobic oxidation of 5-HMF to 2,5-FDCA as a bio-based polyester monomer", 《CATALYSIS SCIENCE & TECHNOLOGY》 * |
| 李玉秀 等: "复合氧化剂法合成氧化玉米淀粉", 《粮食与油脂》 * |
| 李玉秀 等: "微波辅助复合氧化法合成氧化玉米淀粉", 《化学与生物工程》 * |
| 童丹 等: "《马铃薯变性淀粉加工技术》", 31 October 2015, 武汉：武汉大学出版社 * |
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Application publication date: 20190301 |