CN1063903A

CN1063903A - Preparation of fructose by crystallization

Info

Publication number: CN1063903A
Application number: CN 91100632
Authority: CN
Inventors: 何开祥; 肖卫平; 郭茂才; 兰细萍; 韩晓军; 王树阳
Original assignee: RESEARCH INST OF FOOD FERMENTATION MINISTRY OF LIGHT INDUSTRY
Current assignee: RESEARCH INST OF FOOD FERMENTATION MINISTRY OF LIGHT INDUSTRY
Priority date: 1991-02-06
Filing date: 1991-02-06
Publication date: 1992-08-26

Abstract

Method with preparation of fructose by crystallization is that generation syrup is concentrated to solid content 71-81%, with being pumped into crystallizer, be cooled to 28 ℃, add 5%-30% crystalline dextrose, under agitation the crystallization control temperature falls progressively from 28 ℃-12 ℃, glucose crystallization in the massecuite is separated out, and centrifugation goes out the glucose crystal, and the centrifuged supernatant fructose content that obtains is more than 55%.After crystallisation process is finished, separate to obtain product with whizzer, and to stay 5%-40% massecuite be next series-produced crystal seed.

Description

Preparation of fructose by crystallization

The present invention relates to a kind of method with preparation of fructose by crystallization, it belongs to the field of Dian Fentang.

In " Dian Fentang " book that light industry press published in 1981, put down in writing the technical process of producing the fruit glucose syrup, it is by processes such as starch milk liquefaction, saccharification, decolorizing resin processing, isomerization being made generation fruit glucose syrup, the stratography post of spent ion exchange resin or inorganic adsorbent is separated into two portions to the sugar in the generation high fructose syrup then, thereby obtains preparation of fructose.Make preparation of fructose with this method, production process complexity, cost height.Disclose a kind of method with preparation of fructose by crystallization in the United States Patent (USP) 4634472, purpose is to improve fructose content, and method is to be crystal seed with glucose, and weak point is that the production cycle is long, can not serialization production.

The objective of the invention is to avoid above-mentioned defective or deficiency, a kind of method with preparation of fructose by crystallization is provided, and to select massecuite for use be crystal seed, shorten the production cycle.

The present invention realizes by the following method: generation syrup is concentrated to solid content 71-81%, with being pumped into crystallizer, be cooled to 28 ℃, add 5-30%, the crystalline dextrose that the 40-80 order sieves, under agitation the crystallization control temperature falls progressively from 28 ℃-12 ℃, glucose crystallization in the sugar is separated out, and centrifugation goes out the glucose crystal, thereby the centrifuged supernatant fructose content that obtains is more than 55%, be concentrated to 76-78%, be preparation of fructose.

After crystallisation process is finished, separate to obtain product with whizzer, and the massecuite (sugar after the crystallization, before separating, the generation syrup amount of content to add) that stays 5-40% is next series-produced crystal seed.

Produce preparation of fructose with method of the present invention, shortened the production cycle, realized serialization production, and reduced cost.

Describe method of the present invention in detail below in conjunction with embodiment.

Embodiment 1:

The raw material that uses is generation high fructose syrup, and its composition is as follows: solid content 78.02%, DE value 93.32%, transmittance 97.40%, colourity 0.036, fructose content 42.52%.

After this isomery syrup is cooled to 28 ℃, adding was through grinding 40-80 purpose crystalline dextrose, and add-on 5-30% stirs the syrup that adds behind the crystal seed, adopt 28 ℃ of-12 ℃ of temperature methods that fall progressively to make glucose crystallization separate out (7-8 days), thereby the fructose content in the mother liquor rise to 58-60%.

The glucose crystallization body that adopts centrifugation and obtain, the fructose supernatant liquor that obtains contains fructose 57.12%, solid concentration 66.21%.

The glucose that the obtains cake that wets, glucose content 92.56%, fructose content 7.44%.

Embodiment 2:

The foreign matter glycogen material composition that uses in this example is: solid concentration 77.09%, fructose content 44.18%, DE value 92.26.

In above-mentioned raw materials, add 30% massecuite (its composition of syrup after the crystallization, before the separation is: sugared content 57.12%, solid concentration 66.21%), stir cooling down from 28 ℃ to 12 ℃, crystallization 96 hours.

Fructose content 59.46% in the crystallization massecuite, solid substance 76.14%.

A kind of rare liquid glucose of 45% concentration (containing fructose 50%) joins in the massecuite after the crystallization, and add-on 30% is carried out centrifugation.

Obtain fructose content 56.34% after the separation, the preparation of fructose of solid concentration 67.37% is condensed into the concentration of 76-78% at last.

The glucose crystallization cake that obtains contains glucose 89.69%, fructose content 10.31%.

Claims

1, a kind of method with crystallization legal system high fructose oar of two generations, it comprises: generation syrup is concentrated to solid content 71-81%, with being pumped into crystallizer, be cooled to 28 ℃, add crystalline dextrose, the crystallization control temperature, glucose crystallization is separated out, centrifugation goes out crystal, and concentrated supernatant is characterized in that Tc falls progressively from 28 ℃-12 ℃.

2, method according to claim 1, it is characterized in that crystallisation process is finished after, isolate crystal with whizzer, and the massecuite (in the generation syrup amount that adds) that stays 5%-40% is next series-produced crystal seed.

3, method according to claim 1 is characterized in that the crystalline dextrose concentration that adds is 5%-30%, and the 40-50 order sieves.