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Efficient and energy-saving xylose producing process

A production process, high-efficiency and energy-saving technology, applied in sugar production, sugar production, food science, etc., can solve the problems of short resin regeneration cycle, complex process flow, low degree of automation, etc., to reduce steam consumption and extend exchange cycle , The effect of simplifying the production process

Inactive Publication Date: 2012-09-19
上海诚洲科技中心(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This inevitably brings the following defects: complex process flow, cumbersome manipulation; large consumption of activated carbon; large consumption of evaporation; large consumption of acid and alkali; low degree of automation, high labor intensity; short resin regeneration cycle; large amount of regeneration wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is the best embodiment of the present invention.

[0034] A high-efficiency and energy-saving xylose production process, such as figure 1 As shown, it includes the following steps:

[0035] A. Corn cob hydrolysis: mix corn cob with water at a weight ratio of 1:60, add a weak acid catalyst with a weight percentage of corn cob of 1, cook at 170°C for 80 minutes for cracking, and dissolve xylan in the corn cob;

[0036] B. Lime neutralization: add lime to the hydrolyzate to neutralize the acid catalyst in the hydrolyzate, adjust the pH to 2, and then filter through waste carbon;

[0037] C. Security filtration: filter the filtrate from the previous step through a 5 μm bag filter to remove particles and suspended solids;

[0038] D. Membrane continuous impurity removal: use ultrafiltration membrane with a molecular weight of 1000Da, adopt continuous impurity removal method to intercept impurities such as protein, colloid, pigment, calcium and magnesium in...

Embodiment 2

[0051] A high-efficiency and energy-saving xylose production process, such as figure 1 As shown, it includes the following steps:

[0052] A. Corn cob hydrolysis: mix corn cob with water at a weight ratio of 1:50, add a weak acid catalyst with a weight percentage of corn cob of 0.2, cook at 155° C. for 120 min for cracking, and dissolve xylan in the corn cob;

[0053] B. Lime neutralization: add lime to the hydrolyzate to neutralize the acid catalyst in the hydrolyzate, adjust the pH to 1, and then filter through waste carbon;

[0054] C. Security filtration: filter the filtrate from the previous step through a 5 μm bag filter to remove particles and suspended solids;

[0055] D. Membrane continuous impurity removal: use an ultrafiltration membrane with a molecular weight of 1500Da to intercept impurities such as protein, colloid, pigment, calcium and magnesium inorganic salts, etc., and the light transmittance of the hydrolyzed solution is over 80%;

[0056] E. Membrane con...

Embodiment 3

[0068] A high-efficiency and energy-saving xylose production process, such as figure 1 As shown, it includes the following steps:

[0069] A. Corn cob hydrolysis: mix corn cob with water at a weight ratio of 1:70, add a weak acid catalyst with a weight percentage of corn cob of 1.5, cook at 180° C. for 30 minutes for cracking, and dissolve xylan in the corn cob;

[0070] B. Lime neutralization: add lime to the hydrolyzate to neutralize the acid catalyst in the hydrolyzate, adjust the pH to 3, and then filter through waste carbon;

[0071] C. Security filtration: filter the filtrate from the previous step through a 5 μm bag filter to remove particles and suspended solids;

[0072] D. Membrane continuous impurity removal: the ultrafiltration membrane with a molecular weight of 2000Da is used to intercept impurities such as proteins, colloids, pigments, calcium and magnesium inorganic salts, etc., and the light transmittance of the hydrolyzate reaches more than 80%;

[0073] E....

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Abstract

The invention discloses an efficient and energy-saving xylose producing process, which comprises the following steps of: A, corncob hydrolysis; B, lime neutralization; C, cartridge filtration; D, continuous membrane decontamination; E, continuous membrane concentration; F, primary ion exchange; G, primary evaporation; H, activated carbon decoloration; I, secondary ion exchange; J, secondary evaporation; K, third-time evaporation; L, crystallization; M, centrifugation; N, drying; and O, finished product packaging. The process disclosed by the invention has the beneficial effects that impurities and pigment are removed by membrane separation and concentration, the usage amount of activated carbon is reduced, steam consumption is reduced, the pollution load of ion exchange resin is reduced, the regeneration period of the ion exchange resin is prolonged, the discharge of waste water of the producing process is reduced, the production efficiency is improved, and the production cost is reduced, so that the sustainable development ability of an enterprise is promoted.

Description

technical field [0001] The invention relates to the technical field of xylose production technology, in particular to a high-efficiency and energy-saving xylose production technology. Background technique [0002] Xylose is a white needle-like crystal or crystalline powder, sweet in taste, only 40% of sucrose in sweetness, easily soluble in water, slightly soluble in ethanol, melting point 147~150°C, dextrorotatory and variable optical rotation. It is an important chemical raw material, used as a non-caloric sweetener in food and beverages, and suitable for obese and diabetic patients. Industrially, xylose is mainly produced by hydrogenation to xylitol, which is widely used in food, medicine, chemical industry, leather, dyes and other fields. In recent years, in foreign countries, xylose is popular as a food sweetener, and the demand is increasing day by day. [0003] At present, there are many routes for the production of xylose, mainly including neutralization deacidific...

Claims

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Application Information

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IPC IPC(8): C13K13/00
Inventor 邱全国
Owner 上海诚洲科技中心(有限合伙)
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