Method for extracting high purity lactose from milk whey
A high-purity, whey technology, applied in chemical instruments and methods, disaccharides, sugar derivatives, etc., can solve the problems of difficult extraction of lactose, low extraction purity, etc., and achieve high purity, high extraction rate, and reduced processing costs. Effect
Inactive Publication Date: 2016-05-04
NEW HOPE SHUANGXI DAIRY SUZHOU CO LTD
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[0007] In view of the above technical problems, the present invention proposes a method for extracting high-purity lactose from milk whey, which solves the technical problems that lactose is not easy to extract and the extraction purity is not high
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[0028] The present invention will be described in further detail below, so that those skilled in the art can implement it with reference to the description.
[0029] It should be understood that terms such as "having", "comprising" and "comprising" used herein do not denote the presence or addition of one or more other elements or combinations thereof.
[0030] In order to achieve the above object, the present invention adopts the following technical solutions: a method for extracting high-purity lactose from milk whey, such as figure 1 shown, including the following steps:
[0031] Step 1) The fresh milk is centrifuged for the first time on a centrifuge to remove the upper layer of fat to obtain skim milk. The speed of the first centrifugation is 4000r / min-5500r / min. In this embodiment, the centrifuge The rotating speed is 4500r / min, centrifuged for 15 minutes, and after standing for a period of time, the fat in the milk is at the top layer, and the upper layer fat is extrac...
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The invention discloses a method for extracting high purity lactose from milk whey. The method comprises 1, carrying out primary centrifugation on fresh milk to obtain defatted milk, 2, carrying out microfiltration and secondary centrifugation to obtain milk whey and carrying out ultrafiltration to obtain a first penetrative material treated through a first ultrafiltration film, 3, adding an acetic acid-sodium chloride solution into the first penetrative material and carrying out secondary ultrafiltration to obtain a second penetrative material, 4, dropwisely adding the second penetrative material into a sodium hydroxide solution with a concentration of 0.1-5wt%, carrying out filter pressing to obtain a first retentate, dissolving the first retentate in a hydrochloric acid solution with a concentration of 0.08-1.6wt% and carrying out nanofiltration to obtain a forth penetrative material and 5, gradually adding lactose crystals in the forth penetrative material solution and heating the forth penetrative material solution until the solution is dried so that lactose is obtained. The method solves the technical problem that lactose is not easily extracted and has low extraction purity.
Description
technical field [0001] The invention belongs to the technical field of dairy product production, in particular to a method for extracting high-purity lactose from milk whey. Background technique [0002] Whey products belong to the category of dairy products and are by-products of cheese production. About 1 kg of cheese can be produced with 10 kg of fresh milk, and the rest is whey. Fresh whey has about 7% dry matter but contains nearly half the nutrients of fresh milk. In the production process of cheese, most of the fat of milk and casein, which accounts for 80% of the total protein, form the basic framework of cheese curd, while whey is a component other than cheese curd. Most of the nutrients contained in whey are soluble, such as whey protein. Phospholipids, Lactose. minerals and vitamins etc. [0003] Fresh whey is pasteurized and then dried into powder, which is whey powder. The ratio of other ingredients in whey powder except water should be consistent with that...
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IPC IPC(8): C07H3/04C07H1/08
CPCC07H3/04C07H1/08
Inventor 王铁军史寒琴惠建明
Owner NEW HOPE SHUANGXI DAIRY SUZHOU CO LTD