CN1903885A - Predextrinization acetylated distarch phosphate and its preparation method - Google Patents

Abstract

The present invention discloses a kind of pregelatinized acetylated distarch phosphate and its preparation method. It is made up by using water as medium and using waxy starch, acetic anhydride, hydrochloric acid, sodium hydroxide and sodium trimetaphosphate as raw material through 13 processes of mixing paste, alkalization, cross-linking, esterification, neutralization, washing, drying, screening, mixing paste, pregelatinizing, pulverizing, screening and packaging. It can be used as thickening and stabilizing agent in the flavouring material and snack food, etc.

Description

Predextrinization acetylated distarch phosphate and preparation method thereof

Technical field

The present invention relates to a kind of modified starch and preparation method thereof, specifically a kind of Predextrinization acetylated distarch phosphate and preparation method thereof.

Background technology

In recent years, quickening day by day along with people's rhythm of life, the not busy food of various sauces and body arises at the historic moment, and market scale is increasing, this series products must add modified starch, to play thickening, water conservation, effect such as expanded, this will must have powerful water retention capacity, higher viscosity, stronger advantages such as the transparency by changes persuing starch.Above advantage and cost are lower to be favourably welcome acetylize di(2-ethylhexyl)phosphate starch owing to possessing; but shortcomings such as at present domestic like product ubiquity transparency is not good, water retention capacity difference; and a lot of producers are arranged in order to simplify technology, to save production cost; but require employed such modified starch will have the characteristic of cold water gelatinization, these all are that present domestic like product is not available.

Summary of the invention

The object of the present invention is to provide a kind of high viscosity, high-clarity, high substitution value, Predextrinization acetylated distarch phosphate high rehydration, high water retention capacity; it is specially to invent design for various sauces and snackfoods; be used to improve water-retaining capacity, transparency, the increase puffed degree of product; simultaneously, use that can more convenient user, reduce production costs.

Another object of the present invention is to provide the preparation method of Predextrinization acetylated distarch phosphate.

The objective of the invention is to be achieved through the following technical solutions:

This Predextrinization acetylated distarch phosphate is to be raw material with waxy starch, acetic anhydride, hydrochloric acid, sodium hydroxide, Trisodium trimetaphosphate in water medium; through size mixing, alkalization, crosslinked, esterification, neutralization, washing, drying, sieve, size mixing, pre-gelatinization, pulverizing, screening, 13 processing steps of packing be prepared from, its finished product is that white plates particle, cold water solubles, DS are 0.01-0.07.

Concrete processing step is as follows:

Concrete processing step is as follows:

(1), sizes mixing: in reactor, waxy starch and the sodium sulfate or the sodium-chlor that account for starch quality ratio 5-25% are added the farinaceous size that water is modulated into 20-23Be, stir.

(2), alkalization: add the sodium hydroxide solution that mass concentration is 3.0-4.0% in starch milk, transfer pH value to 10.0-12.5, wherein pH value is better at 11.0-12.0, alkalizes 20-120 minute.

(3), crosslinked: as to add the Trisodium trimetaphosphate of waxy starch mass ratio 0.04-0.2%, be warming up to 35-50 ℃, reacted 2-6 hour.

(4), esterification: system temperature is reduced to 10-35 ℃, simultaneously, with mass concentration is that 8-10% hydrochloric acid is transferred 7.0-10.5 with pH value, add the acetic anhydride that accounts for waxy starch mass ratio 1.0-5.5%, maintain the temperature in the 10-35 ℃ of scope and carry out esterification, its temperature of reaction at 15-20 ℃ better, constantly mending mass concentration in esterification reaction process is the solution of the sodium hydroxide of 3.0-4.0%, keep pH value 7.0-10.5, wherein PH=7.5-9.5 is better, continues reaction 1 hour after acetic anhydride adds.

(5), neutralization: after above-mentioned esterification finishes, be the hydrochloric acid soln adjusting pH value 3.0-7.0 of 8-10% with the mass concentration.

(6), washing: adopt the eddy flow washer to advance washing.

(7), drying: dewater to moisture≤45% with scraper centrifugal machine earlier, adopt air stream drying then to moisture≤15%.

(8), screening: cross the 80-100 mesh sieve.

(9), size mixing: with step (6) gained head product furnishing mass concentration is the starch milk of 5-30%, and wherein 20% starch concentration is better.

(10), pre-gelatinization: be to carry out pre-gelatinization under 100-200 ℃ the condition in bowl temperature, wherein bowl temperature be under the 150-170 ℃ of condition better.

(11), pulverize: pulverize with pulverizer.

(12), screening: cross 60 mesh sieves.

(13), packing: adopt 20-25KG/ bag form packing, finally become finished product.

The present invention has following positively effect:

1, Predextrinization acetylated distarch phosphate is raw material with the waxy starch, makes finished product through technologies such as crosslinked, esterification, neutralization, pre-gelatinizations, has that the starting material source is wide, technical process simple and directly is suitable for, product application is effective, production cost is low.

2, the Predextrinization acetylated distarch phosphate of the present invention preparation relatively have high viscosity, high cold water-soluble with in the market like product, stick with paste that the liquid transparency is good, substitution value is high, have behind the food prepared therefrom that water retention capacity is strong, good water absorption, puffed degree advantages of higher; be adapted at using in sauce and the snackfoods; as thickening stabilizer, and can simplify production technique, reduce production costs.

Description of drawings

Fig. 1 is preparation technology's flow process of Predextrinization acetylated distarch phosphate.

Embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail:

With 100 kilograms of starch reactions is example.

Embodiment 1

At first with 100 kilograms of waxy starches, 10 kilograms of sodium sulfate add 180 kilograms of furnishing 20-23Be farinaceous sizes in reactor of water, constantly stir, the sodium hydroxide solution that adds 3-3.8% in still is regulated pH value 11.5, add 0.06 kilogram of Trisodium trimetaphosphate, be warming up to 45 ℃, reacted 4 hours, lower the temperature 20 ℃, regulate pH value to 8.5-9.0, add 4.5 kilograms of acetic anhydride with 8-10% hydrochloric acid, keep temperature to make its reaction for 20 ± 1 ℃, in reaction process, constantly drip the sodium hydroxide solution of 3-3.8%, keep pH value 8.5, after the acetic anhydride interpolation finishes, continue reaction 1 hour, add the 8-10% hydrochloric acid soln and be neutralized to pH value 6.0-7.0, in still, add the washing of 200 kg of water, sedimentation is washed with the same manner again, sedimentation is to remove impurity (sodium sulfate, sodium-chlor or other chemical residues things), make the acetate starch head product, with head product furnishing mass concentration is 20% starch milk, carries out pre-gelatinization under 170 ℃ of bowl temperatures, pulverizes with pulverizer, cross 60 mesh sieves, make finished product.

Embodiment 2

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 8.0, and temperature of reaction remains on 20 ± 1 ℃.

Embodiment 3

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 8.5, and temperature of reaction remains on 25 ± 1 ℃.

Embodiment 4

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 8.5, and temperature of reaction remains on 15 ± 1 ℃.

Embodiment 5

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 9.0, and temperature of reaction remains on 15 ± 1 ℃.

Embodiment 6

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 9.0, and temperature of reaction remains on 20 ± 1 ℃.

Embodiment 7

Step is with embodiment 1, and difference is: the pH value of esterification process maintains 8.0, and temperature of reaction remains on 15 ± 1 ℃.

Application example:

The performance of Predextrinization acetylated distarch phosphate and domestic like product compares:

	Cold water-soluble	Viscosity	Transparency	Water retention capacity
					Domestic like product	Insoluble	Generally	Difference	Generally
Predextrinization acetylated distarch phosphate	Cold water solubles	Higher	Better	Higher

Claims (2)

1, a kind of Predextrinization acetylated distarch phosphate; it is characterized in that: this Predextrinization acetylated distarch phosphate is to be raw material with waxy starch, acetic anhydride, hydrochloric acid, sodium hydroxide, Trisodium trimetaphosphate in water medium; through size mixing, alkalization, crosslinked, esterification, neutralization, washing, drying, sieve, size mixing, pre-gelatinization, pulverizing, screening, 13 processing steps of packing be prepared from, its finished product is that white plates particle, cold water solubles, DS are 0.01-0.07.

2, the preparation method of a kind of Predextrinization acetylated distarch phosphate according to claim 1 is characterized in that:

Its preparation technology's concrete steps are as follows:

(1), sizes mixing: in reactor, waxy starch and the sodium sulfate or the sodium-chlor that account for starch quality ratio 5-25% are added the farinaceous size that water is modulated into 20-23Be, stir;

(2), alkalization: add the sodium hydroxide solution that mass concentration is 3.0-4.0% in starch milk, transfer pH value to 10.0-12.5, wherein pH value is better at 11.0-12.0, alkalizes 20-120 minute;

(3), crosslinked: as to add the Trisodium trimetaphosphate of waxy starch mass ratio 0.04-0.2%, be warming up to 35-50 ℃, reacted 2-6 hour;

(4), esterification: system temperature falls 10-35 ℃, simultaneously, with mass concentration is that 8-10% hydrochloric acid transfers to 7.0-10.5 with pH value, add the acetic anhydride that accounts for waxy starch mass ratio 1.0-5.5%, maintain the temperature in the 10-35 ℃ of scope and carry out esterification, its temperature of reaction at 15-20 ℃ better, constantly mending mass concentration in esterification reaction process is the solution of the sodium hydroxide of 3.0-4.0%, keep pH value 7.0-10.5, wherein PH=7.5-9.5 is better, continues reaction 1 hour after acetic anhydride adds;

(5), neutralization: after above-mentioned esterification finishes, be the hydrochloric acid soln adjusting pH value 3.0-7.0 of 8-10% with the mass concentration;

(6), washing: adopt the eddy flow washer to advance washing;

(7), drying: dewater to moisture≤45% with scraper centrifugal machine earlier, adopt air stream drying then to moisture≤15%;

(8), screening: cross the 80-100 mesh sieve;

(9), size mixing: with step (6) gained head product furnishing mass concentration is the starch milk of 5-30%, and wherein 20% starch concentration is better;

(10), pre-gelatinization: be to carry out pre-gelatinization under 100-200 ℃ the condition in bowl temperature, wherein bowl temperature be under the 150-170 ℃ of condition better;

(11), pulverize: pulverize with pulverizer;

(12), screening: cross 60 mesh sieves;

(13), packing: adopt 20-25KG/ bag form packing, finally become finished product.

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