Method for extracting beta- glucosans from bran of corn

Abstract

The invention provides a method for extracting beta- glucosans by taking bran of corn as material. The method comprises the bran of corn is mixed with water and then extracted respectively by alkali liquor and amylase for centrifugal separation; supernate is added with acid for precipitation to separate and remove protein and concentrated by a spiral-wound film; the mixed solution is precipitated by ammonium sulphate solution, and the precipitated product is dissolved in the water and then concentrated by the spiral-wound film and dried to obtain highland barley beta- glucosans. A horizontal spiral unloading sedimentation centrifugal device is adopted to effectively improve the yield of the beta- glucosans; the ammonium sulphate solution is adopted to selectively sedimentate the beta- glucosans, so as to effectively remove other heteroglycans such as pentosan, xylan and the like in the material, and effectively improve the purity of the beta- glucosans; by adopting the spiral-wound film concentration technique, the water-quality standard of a great deal of produced industrial sewage is higher than tap water, and the industrial sewage can be recycled, so that the aim of energy-saving and emission-reduction can be achieved, and the economic benefit and social benefit of the enterprise can be improved.

Description

technical field

[0001] The invention belongs to the technical field of biochemical industry, and relates to a separation and extraction process of β-glucan, in particular to a method for separating and extracting β-glucan from grain bran. Mainly suitable for barley, highland barley, oats, wheat and other grains. Background technique

[0002] The chemical name of β-glucan is: (1-3)(1-4)-β-D-glucan, which is a non-starch polysaccharide. Studies have shown that β-glucan has the functions of regulating blood sugar, improving immunity, and anti-tumor. At present, the biomedical and nutritional circles generally believe that the physiological effects of β-glucan mainly include four aspects: bowel cleansing, blood sugar regulation, cholesterol lowering, and immunity enhancement.

[0003] According to the information, the grains of highland barley / oat / naked oats contain a lot of β-glucan, among which the content of β-glucan in highland barley is about 3.5-8.6%; the content of β-gl...