CN1033977C - Drying process for producing acid modified starch - Google Patents
Drying process for producing acid modified starch Download PDFInfo
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- CN1033977C CN1033977C CN 94110917 CN94110917A CN1033977C CN 1033977 C CN1033977 C CN 1033977C CN 94110917 CN94110917 CN 94110917 CN 94110917 A CN94110917 A CN 94110917A CN 1033977 C CN1033977 C CN 1033977C
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- starch
- acid
- acid modified
- modified starch
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Abstract
The present invention relates to a pure drying process for producing acid modified starch. Original starch is filled in a reactor to carry out mixed acid reaction, and a finished product is sieved after being catalyzed, evaporated and deacidified. The present invention has the advantages of further enhancement of the quality of the acid modified starch, application range enlargement of a product, production cost reduction, production period shortening, technological process simplification, no need of wash by water, and no need of secondary repeating drying. The present invention can be widely used for the field that maize, cassava, potato and wheat starch is used as the original starch to produce the acid modified starch. The product of the present invention can be used for medicine industry, food industry, chemical industry, iodometry indicator industry, etc.
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.
The method of producing denaturated starch by acid generally adopts wet method now, being about to ative starch furnishing concentration about 32～75% (weight) starch slurry (13-40Re) sends 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 neutralization of NaOH dilute solution, 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 is above as 70 mobilities, the water solubles amount that generates is bigger, 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 equipment is thrown the 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 is that nitration mixture is in starch milk, filter, the wet cake that will have acid places moisture eliminator, washing does not neutralize after reacting by heating is finished, the water solubles remains in the product, the difficult control level of response of this technology, and 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 have necessarily measure sour water, vapour, heat needs 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 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.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～and 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 half warm therapy 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 operation technological process 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 processing unit:
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 power: 31.5kW, 50 rev/mins of mixing speed.
Factory: Xiang Tan starchbased product factory
Three, operating procedure program
Reactor constant temperature enters 200 kilograms of dried corn starch for 1 to 108 ℃, and starting is stirred, and sprays 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%
PH value: 5.5-6 (extensively test paper 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 that warm therapy is produced 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 enters 500 kilograms of W-Gums for 1 to 100 ℃, 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%
PH value: 6-7 (extensively test paper 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 (1)
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 88 ℃-128 ℃ of roasting vaporization temperatures, 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, the straying quatity of catalyzer is 0.06%～2.05% of a weight of material, its sour water weaker concn is 1: 8～1: 150, catalyzed reaction evaporation disacidify after 3-6 hour finished product sieve.
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 CN1094732A (en) | 1994-11-09 |
| CN1033977C true CN1033977C (en) | 1997-02-05 |
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ID=5034834
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 |
|---|---|
| CN (1) | CN1033977C (en) |
Families Citing this family (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 |
| 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 |
-
1994
- 1994-04-08 CN CN 94110917 patent/CN1033977C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1094732A (en) | 1994-11-09 |
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