CN101033261A - Method of preparing acetylated distarch adipate - Google Patents

Abstract

This invention relates to a synthesis method of acetylation di-starch adipate, which takes starch, acetic anhydride, hydrochloric acid, sodium hydroxide, adipic acid as raw materials in water medium, and conducts eight steps of preparing chemicals, conditioning, alkalization, neutralization, washing, drying, screening, and packaging to obtain the product, which has white powder particles, DS of 0.01~0.07, 6% paste E point viscosity of 500 ~ 3000BU. Compared with similar product on the market, the invention has good viscosity, transparency, replacement, shear resistant, heat resistant, and the produced food has good water storage, absorbent, expansion, so it is suitable for sauces and leisure food.

Description

The preparation method of acetylated distarch adipate

Technical field

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

Background technology

Acetylated starch is owing to introduce ethanoyl; weakened the hydrogen bond of starch molecule; so reduced the gelatinization point of starch; the viscosity and the transparency of sticking with paste liquid have been improved; increased water retention capacity; reduced the retrogradation of sticking with paste liquid; so ready-to-eat in foodstuffs industry; quickfrozen food and puffed food aspect obtain widespread use; can farthest increase water-retaining capacity; improve the yield of product; reduce production costs, but often there is the heat-resisting ability deficiency in simple acetylize processing; shortcomings such as anti-shearing difference make it to be very limited in application process; at this moment need increase and suitable crosslinkedly improve the anti-shearing of starch and do high temperature capabilities; crosslinked mode has a lot, but on no matter still being the technology complexity from the production cost angle, the preparation of acetylated distarch adipate all be both economical reasonably.And domestic like product exists high temperature resistant, anti-shear ability deficiency; shortcoming such as liquid transparency, brightness are not enough; the acetylated distarch adipate of producing with this method can reduce production costs when guaranteeing simple operations to greatest extent, can solve above-mentioned some deficiency fully.

Summary of the invention

The object of the present invention is to provide a kind of high viscosity, high-clarity, high substitution value, high rehydration, high water retention capacity; the preparation method of high temperature resistance, shear-stable acetylated distarch adipate; the product of producing with this method can satisfy the application demand of various sauces and snackfoods, is used to improve water-retaining capacity, transparency, the increase puffed degree of product.

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

This acetylated distarch adipate is to be raw material with starch, acetic anhydride, hydrochloric acid, sodium hydroxide, hexanodioic acid in water medium; through the preparation chemical, size mixing, esterification, neutralization, washing, drying, screening, eight processing steps of packing be prepared from, its finished product is that white powder particle, DS 0.01～0.07,6% stick with paste liquid E point viscosity 500～3000BU.

Concrete processing step is as follows:

(1), preparation chemical: acetic anhydride is mixed with the hexanodioic acid that accounts for its mass percent 0.5～5%, under 40～70 ℃ of water bath condition, hexanodioic acid is all dissolved, be cooled under the room temperature condition standby then.

(2), size mixing: in reactor, starch is added the farinaceous size that water is modulated into 20～23Be, stir.

(3), esterification: constantly stir that to add mass concentration down in farinaceous size be 3.0～4.0% sodium hydroxide solution, transfer pH value to 8.0～11.0, add the chemical for preparing that accounts for starch weight 1.0～7.0%, maintain the temperature in 10～35 ℃ of scopes and carry out esterification, in esterification reaction process, constantly mend mass concentration and be the solution of 3.0～4.0% sodium hydroxide, keep pH value 7.0～10.5, after the chemical for preparing adds, continue reaction 1 hour.

(4), neutralization: after above-mentioned esterification finishes, be that 8～10% hydrochloric acid soln is regulated pH value 3.0～7.0 with mass concentration.

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

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

(7), screening: cross 80～100 mesh sieves.

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

The present invention has following positively effect:

The acetylated distarch adipate of the present invention preparation relatively has high viscosity with domestic other like product, stick with paste that the liquid transparency is good, substitution value is high, have after the anti-shearing, high temperature resistant, food prepared therefrom water retention capacity by force, good water absorption, puffed degree advantages of higher; be adapted at using in sauce and the snackfoods; as thickening stabilizer, and can reduce production costs greatly.

Description of drawings

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

Embodiment

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

With 1000 kilograms of starch reactions is example.

Embodiment 1

At first 40 kilograms of acetic anhydride and 1 kilogram of hexanodioic acid are dissolved under 60 ℃ of water-baths fully, be cooled under the room temperature standby, then 1000 kilograms of waxy starches are added 1800 kilograms of furnishing 20～23Be farinaceous sizes in reactor of water, constantly stir, the adding mass concentration is 3～3.8% sodium hydroxide solution adjusting pH value to 9.5 in still, add the chemical for preparing, keep making its reaction under 20 ± 1 ℃ of the temperature, continuous dropping mass concentration is 3～3.8% sodium hydroxide solution in reaction process, keep pH value 8.5, after finishing, the chemical interpolation for preparing continues reaction 1 hour, adding mass concentration is that 8～10% hydrochloric acid solns are neutralized to pH value 6.0～7.0, wash with the eddy flow washer earlier, dewater to moisture≤45% with the scraper type centrifuge then, adopt the pneumatic dryer drying again, make moisture reach≤14.0%, dried starch sieves with 80～100 order reciprocating sieves, and packs by 20～25 kilograms/bag, finally obtains finished product.

Embodiment 2

Step is with embodiment 1, and difference is: the employing tapioca (flour) is that the pH value of raw material, esterification process maintains 8.0, and temperature of reaction remains on 20 ± 1 ℃.

Embodiment 3

Step is with embodiment 1, and difference is: the chemical proportioning is: 40 kilograms of acetic anhydride and 2 kilograms of hexanodioic acids, and 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: be raw material with the yam starch, the pH value of esterification process maintains 8.4, and temperature of reaction remains on 20 ± 1 ℃.

Embodiment 5

Step is with embodiment 1, and difference is: be raw material with the tapioca (flour), the chemical proportioning is: 40 kilograms of acetic anhydride and 1.5 kilograms of hexanodioic acids, and the pH value of esterification process maintains 8.6, 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:

Acetylated distarch adipate and domestic like product application performance compare:

	Heat-resisting ability	Anti-shearing	Viscosity	Transparency	Water retention capacity
						Domestic like product	Difference	Generally	Lower	Generally	Generally
Acetylated distarch adipate	Better	Better	Higher	Better	Higher

Claims (1)

1, a kind of preparation method of acetylated distarch adipate, it is characterized in that: this acetylated distarch adipate is to be raw material with starch, acetic anhydride, hydrochloric acid, sodium hydroxide, hexanodioic acid in water medium, through the preparation chemical, size mixing, esterification, neutralization, washing, drying, screening, eight processing steps of packing be prepared from, its finished product is that white powder particle, DS 0.01～0.07,6% stick with paste liquid E point viscosity 500～3000BU;

Concrete processing step is as follows:

(1), preparation chemical: acetic anhydride is mixed with the hexanodioic acid that accounts for its mass percent 0.5～5%, under 40～70 ℃ of water bath condition, adipic acid is all dissolved, be cooled under the room temperature condition standby then;

(2), size mixing: in reactor, starch is added the farinaceous size that water is modulated into 20～23Be, stir;

(3), esterification: constantly stir that to add mass concentration down in farinaceous size be 3.0～4.0% sodium hydroxide solution, transfer pH value 8.0～11.0, add the chemical for preparing that accounts for starch weight 1.0～7.0%, maintain the temperature in 10～35 ℃ of scopes and carry out esterification, in esterification reaction process, constantly mend mass concentration and be the solution of 3.0～4.0% sodium hydroxide, keep pH value 7.0～10.5, after the chemical for preparing adds, continue reaction 1 hour;

(4), neutralization: after above-mentioned esterification finishes, be that 8～10% hydrochloric acid soln is regulated pH value 3.0～7.0 with mass concentration;

(5), washing: adopt the eddy flow washer to wash;

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

(7), screening: cross 80～100 mesh sieves;

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

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