CN107573420A - A kind of preparation method of cornstarch - Google Patents

Abstract

The present invention relates to have corn deep processing technology field, and in particular to a kind of preparation method of cornstarch, comprises the following steps：A, the purification of corn, b, immersion, c, corase grind, d, secondary immersion, e, germ separation, f, corn mill, g, starch screening, h, Separation of Proteins, i, centrifugal dehydration, j, dry wet starch, get product.The present invention acts on Corn Seeds using acid protease and Premeabilisation of cells agent, to break protein net therein, comes out starch release, and soak time is greatly reduced, while replaces sulphite with acid protease, reduces SO in starch₂Residual, twice crush improve flour extraction.

Description

A kind of preparation method of cornstarch

Technical field

The present invention relates to have corn deep processing technology field, and in particular to a kind of preparation method of cornstarch.

Background technology

Corn is one kind in the most important cereal crops in China or even the whole world, and the production and consumption of corn are constantly pushing away The fast development of dynamic person's world agriculture, it serves not only as the existence that a kind of cereal crops support numerous mankind, also served as simultaneously A kind of important raw material of industry, by the general production applied to cornstarch.

At present, the processing method of the cornstarch separating-purifying of industrialization large-scale production has been realized both at home and abroad, has generally been adopted It is two methods of wet method and dry method.Relative to wet method preparation process, in dry method production of corn starch, the recovery rate of starch It is relatively low, and the purifying that starch is closed in the separation of follow-up corn other components also has certain difficulty.Therefore, in recent years, The preparation of Corn Starch Wet occupies the main status of production of corn starch with purification.

Three kinds of Hard grain type, dent type and half dent type corns are to plant widely used several jade in the world at present Rice, the production of cornstarch, for the production of Corn Starch Wet, its corn soaking and starch isolation work are carried out using it Skill is time-consuming longer, and sulfur dioxide residue problem is serious in soaking technology, and the processing and environment to the later stage have largely Influence, therefore, new production of corn starch technique is the subject matter that industry need to solve.

The content of the invention

In order to solve shortcomings and deficiencies of the prior art, the present invention provides a kind of preparation method of cornstarch, this method By reasonably soaking and disintegrating process, the soak time of corn can not only be shortened, and cornstarch recovery rate can be improved.

Technical scheme is used by solve technical problem：

A kind of preparation method of cornstarch, comprises the following steps：

A, the purification of corn：The methods of stone, magnet are gone using screening, selection by winnowing, proportion, remove dust, sandstone, iron in iblet The impurity such as nail, wood chip, it is allowed to purify；

B, soak：Corn is soaked 3-4 hours with 40-60 DEG C of water, softens iblet, iblet is aqueous up to more than 40%；

C, roughly grind：Corn after immersion is broken into more than 10 pieces of fritter, to carry out germ separation；

D, secondary immersion：Corn after corase grind is used by 12000~20000U/100g corns addition acid protease, then pressed 0.1g~0.5g/100mL water adds Premeabilisation of cells agent disecoctylmaleate sodium sulfonate, soluble in water, and PH is adjusted with HCl Value is placed in 3~5h of vibration immersion in water bath chader, pH value is adjusted per half an hour in immersion process, is filtered off after immersion to 3.0 Soak；

E, germ separation：Using plumule cyclone hydraulic separators, separative efficiency is high, up to more than 95%；

F, corn mill：After separated plumule, the protein of dilute starch slurry, amylum body and entoderm connects together, and is sieving On can not separate, so having to pass through fine grinding, separate starch and fiber, seitan；

G, starch sieves：Finely ground obtained corn steep liquor, starch, thick slag and fine slag are separated with hexagonal reel or plansifter or bent sieve；

H, Separation of Proteins：Starch milk after centrifuge protein isolate matter, in rotary filter press machine（It is concatenated totally 9）In Further protein isolate matter, the content of protein is 2.5% in starch after centrifuge separates, through rotary filter press machine separate with Afterwards, protein content is down to 0.3%；

I, centrifugal dehydration：With centrifuge dewatering, starch milk aqueous 78% is down to 45%, wet starch can be obtained；

J, wet starch is dried：Using pneumatic conveying drying, starch after drying, moisture 12%, get product.

The beneficial effects of the invention are as follows：The present invention acts on Corn Seeds using acid protease and Premeabilisation of cells agent, to beat Break protein net therein, come out starch release, due to the high efficiency of enzyme, be greatly reduced soak time, soak time by 6-9 hours are shortened within past more than 60 hours, while sulphite is replaced with acid protease, reduce SO in starch₂It is residual Stay, decrease the pollution of environment；It is thin after first thick, crush twice：Corn is broken into more than 10 pieces for the first time, it is thin again for the second time Mill, as a result than one time fine grinding improve flour extraction 0.76%.

Embodiment

Embodiment 1：

A kind of preparation method of cornstarch, comprises the following steps：

A, the purification of corn：The methods of stone, magnet are gone using screening, selection by winnowing, proportion, remove dust, sandstone, iron in iblet The impurity such as nail, wood chip, it is allowed to purify；

B, soak：Corn is soaked 3 hours with 60 DEG C of water, softens iblet, iblet is aqueous up to more than 40%；

C, roughly grind：Corn after immersion is broken into 10 pieces of fritter, to carry out germ separation；

D, secondary immersion：By the corn after corase grind use by 12000U/100g corns addition acid protease, then by 0.1g/ 100mL water adds Premeabilisation of cells agent disecoctylmaleate sodium sulfonate, soluble in water, adjusts pH value to 3.0 with HCl, puts 3h is soaked in vibration in water bath chader, and PH is adjusted per half an hour in immersion process, soak is filtered off after immersion；

E, germ separation：Using plumule cyclone hydraulic separators, separative efficiency is high, up to 95%；

F, corn mill：After separated plumule, the protein of dilute starch slurry, amylum body and entoderm connects together, and is sieving On can not separate, so having to pass through fine grinding, separate starch and fiber, seitan；

G, starch sieves：Finely ground obtained corn steep liquor, starch, thick slag and fine slag are separated with hexagonal reel；

H, Separation of Proteins：Starch milk after centrifuge protein isolate matter, in rotary filter press machine（It is concatenated totally 9）In Further protein isolate matter, the content of protein is 2.5% in starch typically after centrifuge separates, and is separated through rotary filter press machine After, protein content is down to 0.3%；

I, centrifugal dehydration：With centrifuge dewatering, starch milk aqueous 78% is down to 45%, wet starch can be obtained；

J, wet starch is dried：Using pneumatic conveying drying, starch after drying, moisture 12%, get product.

Embodiment 2：

A kind of preparation method of cornstarch, comprises the following steps：

A, the purification of corn：The methods of stone, magnet are gone using screening, selection by winnowing, proportion, remove dust, sandstone, iron in iblet The impurity such as nail, wood chip, it is allowed to purify；

B, soak：Corn is soaked 4 hours with 40 DEG C of water, softens iblet, iblet is aqueous up to more than 40%；

C, roughly grind：Corn after immersion is broken into 12 pieces of fritter, to carry out germ separation；

D, secondary immersion：Corn is used by 20000U/100g corns addition acid protease, then adds cell by 0.5g/100mL water Bleeding agent disecoctylmaleate sodium sulfonate, it is soluble in water, pH value is adjusted to 3.0 with HCl, is placed in water bath chader and is shaken Immersion 5h is swung, PH is adjusted per half an hour in immersion process, soak is filtered off after immersion；

E, germ separation：Using plumule cyclone hydraulic separators, separative efficiency is high, up to 96%；

F, corn mill：After separated plumule, the protein of dilute starch slurry, amylum body and entoderm connects together, and is sieving On can not separate, so having to pass through fine grinding, separate starch and fiber, seitan；

G, starch sieves：Finely ground obtained corn steep liquor, starch, thick slag and fine slag are separated with plansifter；

H, Separation of Proteins：Starch milk after centrifuge protein isolate matter, in rotary filter press machine（It is concatenated totally 9）In Further protein isolate matter, the content of protein is 2.5% in starch after centrifuge separates, through rotary filter press machine separate with Afterwards, protein content is down to 0.3%；

I, centrifugal dehydration：With centrifuge dewatering, starch milk aqueous 78% is down to 45%, wet starch can be obtained；

J, wet starch is dried：Using pneumatic conveying drying, starch after drying, moisture 12%, get product.

Embodiment 3：

A kind of preparation method of cornstarch, comprises the following steps：

A, the purification of corn：The methods of stone, magnet are gone using screening, selection by winnowing, proportion, remove dust, sandstone, iron in iblet The impurity such as nail, wood chip, it is allowed to purify；

B, soak：Corn is soaked 3.5 hours with 50 DEG C of water, softens iblet, iblet is aqueous up to more than 40%；

C, roughly grind：Corn after immersion is broken into 11 pieces of fritter, to carry out germ separation；

D, secondary immersion：Corn after corase grind is used by 15000U/100g corns addition acid protease, then by 0.3g/100mL Water adds Premeabilisation of cells agent disecoctylmaleate sodium sulfonate, soluble in water, adjusts pH value to 3.0 with HCl, is placed in water-bath 4h is soaked in vibration in oscillator, and PH is adjusted per half an hour in immersion process, soak is filtered off after immersion；

E, germ separation：Using plumule cyclone hydraulic separators, separative efficiency is high, up to 97%；

F, corn mill：After separated plumule, the protein of dilute starch slurry, amylum body and entoderm connects together, and is sieving On can not separate, so having to pass through fine grinding, separate starch and fiber, seitan；

G, starch sieves：Finely ground obtained corn steep liquor, starch, thick slag and fine slag are separated with song sieve；

H, Separation of Proteins：Starch milk after centrifuge protein isolate matter, in rotary filter press machine（It is concatenated totally 9）In Further protein isolate matter, the content of protein is 2.5% in starch typically after centrifuge separates, and is separated through rotary filter press machine After, protein content is down to 0.3%；

I, centrifugal dehydration：With centrifuge dewatering, starch milk aqueous 78% is down to 45%, wet starch can be obtained；

J, wet starch is dried：Using pneumatic conveying drying, starch after drying, moisture 12%, get product.

Claims (1)

1. a kind of preparation method of cornstarch, it is characterised in that comprise the following steps：

A, the purification of corn：Stone, magnet method are gone using screening, selection by winnowing, proportion, remove dust, sandstone, iron in iblet Nail, wood chip impurity；

B, soak：Corn is soaked into 3-5 hours with 40-60 DEG C of water, softens iblet, iblet is aqueous up to more than 40%；

C, roughly grind：Corn after immersion is broken into more than ten pieces of fritter；

D, secondary immersion：Corn after corase grind is used by 12000~20000U/100g corns addition acid protease, then pressed 0.1g~0.5g/100mL water adds Premeabilisation of cells agent disecoctylmaleate sodium sulfonate, soluble in water, and PH is adjusted with HCI Value is placed in 3~5h of vibration immersion in water bath chader, PH is adjusted per half an hour in immersion process, leaching is filtered off after immersion to 3.0 Steep liquid；

E, germ separation：Separated using with plumule cyclone hydraulic separators；

F, corn mill：Starch, fiber and seitan are separated；

G, starch sieves：Starch, thick slag and fine slag are separated using with hexagonal reel or plansifter or bent sieve；

H, Separation of Proteins：Using centrifuge, the starch milk after centrifuge protein isolate matter, egg is separated in rotary filter press machine White matter；

I, centrifugal dehydration：Using centrifuge dewatering, starch milk water content is reduced, obtains wet starch；

J, wet starch is dried：Using pneumatic conveying drying, starch after drying, moisture 12%, get product.