CN1094732A - Drying process for producing acid modified starch - Google Patents
Drying process for producing acid modified starch Download PDFInfo
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- CN1094732A CN1094732A CN 94110917 CN94110917A CN1094732A CN 1094732 A CN1094732 A CN 1094732A CN 94110917 CN94110917 CN 94110917 CN 94110917 A CN94110917 A CN 94110917A CN 1094732 A CN1094732 A CN 1094732A
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- denaturated
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Abstract
The present invention relates to a kind of drying process for producing acid modified starch.It is that ative starch is entered nitration mixture reaction in the reactor, and finished product sieves behind the catalysis evaporation disacidify.The present invention can further improve the quality product of denaturated starch by acid, enlarge the range of application of product, reduce production costs, shorten the production cycle, simplify technical process, need not wash, it is dry not need secondary to repeat, can be widely used in corn, cassava, potato and wheat starch and produce denaturated starch by acid as ative starch, its product can be used for industries such as medicine, food, chemical industry, iodometry indicator.
Description
The present invention relates to a kind of production method of modified starch, particularly a kind of drying process for producing acid modified starch.
Existing method of producing denaturated starch by acid generally adopts wet method, the starch slurry that is about to the about 18-40Be of ative starch furnishing concentration is sent in the reactor, the hydrochloric acid or the sulfuric acid that add 0.5-10%, be lower than under the gelatinization point condition (50 ℃-55 ℃) stir about 10 hours, after meeting the requirements of viscosity, add the dilute NaOH solution neutralization, stopped reaction, through washing, after the drying, what obtain is exactly denaturated starch by acid, when the high mobility denaturated starch by acid of production was above as 70 mobilities, the water solubles amount of generation was bigger, and 90 mobility product water solubles growing amounts can reach 10-15%, in filtering washing step, easily pour off with waste water, and these have acid water solubles discharge of wastewater and cause environmental pollution, in and the cost recovery height, recycle and can cause the constant product quality poor performance; Its production process route is as follows:
Dry starch → starch milk → medicament reaction → washing → dehydration → drying → pulverize → sieve → weighing and bagging
This production method fixed capital facility investment expense height, the technological process of production is long, production cycle is long, need 12-14 hour from ative starch to the denaturated starch by acid finished product, because need ative starch furnishing starch slurry, the equipment occupation space and the place of its liquid reaction are big, working continuously to possess two complete equipments, particularly need the place and be used for environmental improvement, its supplementary material cost expiration height.Existing a kind of comparatively advanced dry technology for production, it be nitration mixture in starch milk, filter, the wet cake that will have acid places moisture eliminator, the washing that do not neutralize after reacting by heating is finished, and the water solubles remains in the product, the difficult control level of response of this technology, its production process route is as follows:
Dry starch → starch acid mixes breast → filtration → dry heat and reacts → sieve → weighing and bagging
It has just shortened the liquid reaction time merely, but has prolonged solid state reaction and exsiccant time, needs 10-12 hour from dry starch to denaturated starch by acid finished product process.Because this production technique still is in semi-wet method production, in being filtered into the process of cake, still have the loss of a spot of microparticle starch and the water solubles, and there are a certain amount of waste acid water, vapour, heat to need to administer, recovery utilization rate is low, the control expense height, there is redrying energy consumption cost expenditure, takes to reclaim or recycling had not only increased the production cost expense but also existed production quality control to stablize difficulty big.Also have a kind of dry technology for production: be with after the acid of SiO 2 powder carrier absorption with the dry starch hybrid reaction, products obtained therefrom character is identical with wet processing, but the sulfate radical that is contained in the product, ash, acidity, transparency index are difficult to reach food sanitation standard, and its range of application is restricted.
The object of the present invention is to provide and a kind ofly can shorten the production cycle, simplify technical process, the drying process for producing acid modified starch that cost is low and quality product is higher.
The objective of the invention is to realize in the following manner: ative starch is entered the self-controlling electrothermal formula interlayer reactor that reaches the roasting vaporization temperature, keep being stirred in and spray into any catalyzer among the interior dilute hydrochloric acid of reactor or nitric acid or the sulfuric acid three before material is lower than gelatinization point, catalyzed reaction evaporation disacidify is after 3-6 hour, and finished product sieves.The roasting vaporization temperature preferably is controlled between 88 ℃-128 ℃.The straying quatity of catalyzer is the 0.06%-2.05% of weight of material preferably, and its sour water weaker concn is preferably 1: 8-1: 150.Catalyzed reaction evaporation disacidify preferably 4-5 hour.According to the purposes of desired product, can after evaporating disacidify, catalyzed reaction carry out neutralization reaction after sieve.Generally nitration mixture is accurate in scale need not neutralize.Production method operational path of the present invention is as follows:
Dry starch → nitration mixture reaction (neutralization) → sieve → weighing and bagging
The present invention can further improve the quality product of denaturated starch by acid, enlarge the range of application of product, reduce production costs, shorten the production cycle, simplify technical process, can shorten the production cycle to four with existing wet process technique comparison/one, can shorten the production cycle to three with semi-wet method and dry technology for production comparison/one.But this explained hereafter denaturated starch by acid whole process is in closed state, no waste acid water and water solubles discharging, need not administer, noise of equipment is low, because the automatic control degree height of equipment, operational path is brief, easy and simple to handle, only need be according to the purposes accurate calculation reagent dosage of product, strict operating procedure rules can be guaranteed the stability of production quality control.Need not wash, it is dry not need secondary to repeat, no water solubles amount loss, and the recovery rate over dry can reach more than 95% to over dry, build the gross investment of annual output 800-1000 ton denaturated starch by acid apparatus for production line and be about 150,000 yuan (by existing valencys), the factory building usable floor area is 600 square metres.Can be widely used in corn, cassava, potato and wheat starch and produce denaturated starch by acid as ative starch, its product can be used for industries such as medicine, food, chemical industry, iodometry indicator.
Below with reference to embodiment the present invention is described in further detail.
Embodiment 1:
One, raw and auxiliary material technological preparation:
W-Gum: (Tangyin, Henan corn comprehensive test factory)
Meet physical and chemical standards: (GB8885-88) the top grade product are 200 kilograms
Food grade hydrochloric acid: (zhuzhou,hunan chemical plant)
Hydrochloric acid 396ml+31680ml distilled water
Be made into dilute acid: 32076ml
Two, technological test equipment:
Self-controlling electrothermal formula interlayer reactor (nonstandard manufacturing) material capacity: 900 kilograms of total powers: 50 rev/mins of 31.5KW mixing speed
Factory: Xiang Tan starchbased product factory
Three, operating procedure program
Reactor constant temperature I to 108 ℃ enters 200 kilograms of dried corn starch, and starting is stirred.Spray into dilute hydrochloric acid 32076ml.It is 3.5 hours that material temperature rise to 50 ℃ enters 128 ℃ of reactive evaporations accumulative totals of constant temperature II.Sampling: record 1% solution with extensive test paper and be discharging behind the PH5.5, sieve, pack.
Extracting screen underflow material sample: press edible acid modified starch (Zulkovsky starch) standard testing result:
Proterties: water insoluble, ethanol and ether.
Solubleness:＞1%
The extensive test paper of pH value: 5.5-6(is measured)
Stability: 1% clear solution transparent after 12 hours (little muddy), 24 hours sediment-frees contrast (sample: magnificent chemical plant is built in Guangzhou) with the food grade sample of wet production denaturated starch by acid (Zulkovsky starch) technology.
All other physical and chemical indexs: meet tapioca (flour) wet production denaturated starch by acid (Zulkovsky starch) technology food grade standard.
Embodiment 2:
One, starting material technological preparation:
Mechanism tapioca (flour): (state-run bright positive starch chemical plant, Guangxi)
Meet 500 kilograms of physical and chemical standards (Guangdong Q-QB9-85) first grade starch
Food grade hydrochloric acid: (zhuzhou,hunan chemical plant)
Hydrochloric acid 980ml+78400ml distilled water
Be made into dilute acid: 79380ml
Two, technological test equipment: identical with embodiment 1
Three, operating procedure program
Reactor constant temperature I to 100 ℃ enters 500 kilograms of dried corn starch, and starting is stirred.Spray into dilute hydrochloric acid 79380ml.It is 4.5 hours that material temperature rise to 50 ℃ enters 128 ℃ of reactive evaporations accumulative totals of constant temperature II.Sampling: record 1% solution with extensive test paper and be discharging behind the PH5.5, sieve, pack.
Extracting screen underflow material sample: press edible acid modified starch (Zulkovsky starch) standard testing result:
Proterties: water insoluble, ethanol and ether.
Solubleness:＞1%
The extensive test paper of pH value: 6-7(is measured)
Stability: with the food grade sample contrast (sample: magnificent chemical plant is built in Guangzhou) of wet production denaturated starch by acid (Zulkovsky starch) technology.The transparent nothing of solution precipitation after 24 hours, (little muddy) are identical with wet process technique.
All other physical and chemical indexs: meet tapioca (flour) wet production denaturated starch by acid (Zulkovsky starch) technology food grade standard.
Claims (4)
1, a kind of drying process for producing acid modified starch, it is characterized in that: ative starch is entered the self-controlling electrothermal formula interlayer reactor that reaches the roasting vaporization temperature, keep stirring, before being lower than gelatinization point, material sprays in the reactor any catalyzer among dilute hydrochloric acid or nitric acid or the sulfuric acid three, catalyzed reaction evaporation disacidify is after 3--6 hour, and finished product sieves.
2, according to the described method of claim 1, it is characterized in that: the roasting vaporization temperature preferably is controlled between 88 ℃-128 ℃.
3, according to the described method of claim 1, it is characterized in that: the straying quatity of catalyzer is the 0.06%-2.05% of weight of material preferably, and its sour water weaker concn is preferably 1: 8-1: 150.
4,, it is characterized in that catalyzed reaction evaporation disacidify preferably 4-5 hour according to the described method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110917 CN1033977C (en) | 1994-04-08 | 1994-04-08 | Drying process for producing acid modified starch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94110917 CN1033977C (en) | 1994-04-08 | 1994-04-08 | Drying process for producing acid modified starch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1094732A true CN1094732A (en) | 1994-11-09 |
| CN1033977C CN1033977C (en) | 1997-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94110917 Expired - Fee Related CN1033977C (en) | 1994-04-08 | 1994-04-08 | Drying process for producing acid modified starch |
Country Status (1)
| Country | Link |
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| CN (1) | CN1033977C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453100A (en) * | 2010-11-04 | 2012-05-16 | 廖俊云 | Pure dry preparation method of acid treated starch |
| CN107216399A (en) * | 2017-08-07 | 2017-09-29 | 东北林业大学 | The method that heat chemistry modified starch, preparation method and application heat chemistry modified starch prepare adhesive |
| CN107915784A (en) * | 2017-12-18 | 2018-04-17 | 河南工业大学 | A kind of intelligence dried starch homogeneously takes off branch polymerization |
-
1994
- 1994-04-08 CN CN 94110917 patent/CN1033977C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453100A (en) * | 2010-11-04 | 2012-05-16 | 廖俊云 | Pure dry preparation method of acid treated starch |
| CN107216399A (en) * | 2017-08-07 | 2017-09-29 | 东北林业大学 | The method that heat chemistry modified starch, preparation method and application heat chemistry modified starch prepare adhesive |
| CN107216399B (en) * | 2017-08-07 | 2019-10-01 | 东北林业大学 | Heat chemistry modified starch and preparation method thereof |
| CN107915784A (en) * | 2017-12-18 | 2018-04-17 | 河南工业大学 | A kind of intelligence dried starch homogeneously takes off branch polymerization |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1033977C (en) | 1997-02-05 |
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