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Method for separating and purifying lactose from whey

A technology for separation and purification of whey, applied in chemical instruments and methods, disaccharides, sugar derivatives, etc., can solve the problems of cumbersome operation steps, low purity of lactose, etc., and achieve simple purification process and high purity of lactose , adsorption capacity and large surface area

Pending Publication Date: 2018-07-10
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, commercialized lactose is mostly synthesized from glucose, and the price is relatively high; the extraction of lactose from whey is only in the laboratory stage, and there are mainly defects such as low purity, cumbersome operation steps, and high cost.
The traditional crystallization method includes: the experimental process of the crystallization method is as follows: milk→skimming→acidification→whey→heating→neutralization→heating→filtration→evaporative concentration→crystallization→separation of mother liquor→washing and crystallization→drying→lactose→inspection→packaging → Finished product; it has defects such as cumbersome operation steps and low purity of lactose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for separating and purifying lactose from bovine whey, comprising the steps of:

[0021] Bovine whey composition analysis, weight percentage: protein 0.5-0.6%, fat 0.2-0.3%, lactose 5.1-5.3%, inorganic salt 0.7-0.8%, and the rest is water.

[0022] Put the bovine whey in a container, heat it to 70°C, keep it warm for 5min, then centrifuge at 2000rpm for 5min, collect the supernatant, then add 0.3% (w / w) adsorbent to the supernatant, and stir at 300rpm 5min, then stand still for 90min, filter through a 100-mesh sieve, and collect the filtrate;

[0023] Pass the filtrate through the nanofiltration membrane, the nanofiltration temperature is 30°C, the cutoff is 500Da, and the filtrate is collected;

[0024] Concentrate the filtrate to one-fifth of the original volume. The concentrated feed liquid enters the crystallization tank. The temperature of the feed liquid is controlled at 90°C, and the temperature of the feed liquid is kept at 60 minutes. The crystals and...

Embodiment 2

[0027] A method for separating and purifying lactose from bovine whey, comprising the steps of:

[0028] Bovine whey composition analysis, weight percentage: protein 0.5-0.6%, fat 0.2-0.3%, lactose 5.1-5.3%, inorganic salt 0.7-0.8%, and the rest is water.

[0029] Put the bovine whey in a container, heat it to 75°C, keep it warm for 6 minutes, then centrifuge at 2000rpm for 3 minutes, collect the supernatant, then add 0.5% (w / w) of adsorbent to the supernatant, and stir at 300rpm 5min, then stand still for 60min, filter through a 100-mesh sieve, and collect the filtrate;

[0030] Pass the filtrate through the nanofiltration membrane, the nanofiltration temperature is 35°C, the cut-off is 500Da, and the filtrate is collected;

[0031] Concentrate the filtrate to one-fifth of the original volume, and enter the concentrated feed liquid into the crystallization tank, control the temperature of the feed liquid to 90°C, keep it warm for 30 minutes, separate and obtain crystals and ...

Embodiment 3

[0034] A method for separating and purifying lactose from bovine whey, comprising the steps of:

[0035] Bovine whey composition analysis, weight percentage: protein 0.5-0.6%, fat 0.2-0.3%, lactose 5.1-5.3%, inorganic salt 0.7-0.8%, and the rest is water.

[0036] Put the bovine whey in a container, heat it to 70°C, keep it warm for 10 minutes, then centrifuge at 2000rpm for 3-5 minutes, collect the supernatant, and then add an adsorbent accounting for 0.4% (w / w) of the supernatant to the supernatant, Stir at 300rpm for 5min, then let stand for 80min, filter through a 100-mesh sieve, and collect the filtrate;

[0037] Pass the filtrate through the nanofiltration membrane, the nanofiltration temperature is 32°C, the cut-off is 500Da, and the filtrate is collected;

[0038] Concentrate the filtrate to one-fifth of the original volume. The concentrated feed liquid enters the crystallization tank. The temperature of the feed liquid is controlled at 90°C and kept for 50 minutes. T...

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PUM

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Abstract

The invention belongs to the technical field of sugar separation and purification, and discloses a method for separating and purifying lactose from whey. The method comprises the steps that the lactose is placed into a vessel, heating is carried out to 70-75 DEG C, heat preservation is conducted, then centrifugation is carried out, a supernatant liquid is collected, then adsorbent is added into the supernatant liquid, stirring is conducted, then standing and filtering are conducted, and a filter liquid is collected; the filter liquid is filtered through nanofiltration membrane, and a filteredliquid is collected; the filtered liquid is concentrated, crystallized and dried to obtain the lactose. The method for separating and purifying the lactose from the whey has the advantages that the extraction and purification method is simple, the purity degree of the lactose is high, and the operability is high.

Description

technical field [0001] The invention belongs to the technical field of sugar separation and purification, and relates to a method for separating and purifying lactose from whey. Background technique [0002] Whey usually refers to the by-product of cheese production from cow's or goat's milk. Whey is the green, translucent liquid that separates when milk coagulates into curds during cheese production. Whey is directly spray-dried into powder or concentrate, and can also be further processed into other whey products, such as demineralized whey powder, low lactose whey powder, high lactose whey powder, lactose, whey protein concentrate and Whey protein isolate etc. [0003] Lactose exists only in mammalian milk in nature, and one molecule of lactose can be digested to obtain one molecule of glucose and one molecule of galactose. The main function of lactose is to provide heat energy for the human body. Children and adults need a lot of heat energy for growth and development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/04C07H1/08B01D15/08
CPCB01D15/08C07H1/08C07H3/04
Inventor 姜竹茂杨宝雨高珊珊刘婕单静
Owner YANTAI UNIV
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