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Hydrolysis treatment method of straw hemicellulose

A technology of hemicellulose and straw, which is applied in the field of hydrolysis treatment of straw hemicellulose, can solve the problem of low efficiency of hydrolysis equipment, achieve the effect of reducing the burden of purification process, saving manpower and material resources, and saving manpower and equipment

Active Publication Date: 2014-09-17
谷创芯生物科技(厦门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Another object of the present invention is to provide a method for hydrolysis of straw raw materials with high specific volume (pot filling density) in a pot, so as to further solve the problem of low efficiency of hydrolysis equipment

Method used

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  • Hydrolysis treatment method of straw hemicellulose
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  • Hydrolysis treatment method of straw hemicellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to solid: liquid = 1: 10, add 1.8% sulfuric acid to the pulverized material, hydrolyze for 90min at 121°C, measure the total sugar and xylose of the hydrolyzate by HPLC, calculate the productive rate of total sugar and xylose according to the following formula, and use this Serve as a reference standard for comparison between different hydrolysis conditions.

[0032]

[0033]

[0034] Table 1 Total sugar and xylose yields of dilute acid hydrolyzates of different straw raw materials

[0035]

Embodiment 2

[0036] The method of embodiment 2 quick pickling of stalks

[0037] The main obstacle affecting the pickling speed is the air in the material. If the air inside the corncob tissue is removed, or the pressure of the pickling solution is extracted, and the acid is directly pressed into the inside of the corncob, the pickling efficiency should be accelerated. In this example, taking corn cobs with complete morphology as the object, the effects of four different pickling methods on pickling were compared and studied in a 50L hydrolysis tank. Method 1, pickling in vacuum, that is, evacuating the hydrolysis tank full of materials to -0.9Mpa, then injecting acid solution (1.5% sulfuric acid) to soak the materials, and maintaining normal pressure for pickling for a certain period of time. Method two, vacuum-pressure pickling. After vacuumizing the material, inject acid solution, and directly use a pump to pressurize to 0.04Mpa for pickling for a certain period of time. Method three,...

Embodiment 3

[0043] Example 3 Corn cob hydrolysis in a conventional pot

[0044] After obtaining a 50L hydrolysis tank with corncobs in a regular density pot, an applicable pickling method and basic hydrolysis conditions, a 1t hydrolysis tank was used for verification in this example.

[0045] 1t hydrolysis tank (stainless steel) single-tank corn cob (water content about 14%) 116-120kg, the pressure swing pickling process is basically the same as the conditions of the 50L tank. The specific process is: after charging, use a pump to inject acid solution (1.3% sulfuric acid) until the acid solution flows out of the overflow port, close the overflow valve and continue to pump the acid solution to 0.2MPa, and open the overflow valve to drain to 0.2MPa after maintaining pressure for 15 minutes. 0MPa, pump the acid solution to 0.2MPa for the second time and maintain the pressure for 45 minutes, open the overflow valve to drain to 0MPa, and pump the acid solution to 0.2MPa for the third time and ...

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Abstract

The invention discloses a hydrolysis treatment method of straw hemicellulose, which includes loading straw raw materials into a hydrolysis tank, pickling, discharging free acid liquid, introducing steam into the hydrolysis tank and hydrolyzing the hemicellulose of pickled straws. The method saves large work load of smashing the straws in a traditional method and saves a large amount of labor and materials. By means of the method, pickling and hydrolyzing are both conducted in the hydrolysis tank, and compared with a traditional method of pickling in a pickling tank, then taking out the straws and loading the straws into the hydrolysis tank to be hydrolyzed, the method saves the pickling tank and a large amount of labor and devices.

Description

technical field [0001] The invention relates to a method for hydrolyzing straw hemicellulose. Background technique [0002] Straw is the general term for the remaining stems, leaves, and ears of mature grass crops after harvesting seeds, and also includes bagasse after sugar extraction. Its main components include lignin, cellulose, and hemicellulose. These three components The approximate proportions of different crop straws are 30-50% of cellulose, 20-35% of hemicellulose, and 20-30% of lignin. Among them, the cellulose hydrolyzate is glucose (six-carbon sugar), the hemicellulose hydrolyzate is mainly xylose and arabinose (both are five-carbon sugar), and the lignin degradation products are a series of complex compounds containing benzene rings. [0003] The hemicellulose part of straw is easily hydrolyzed by dilute acid to generate hemicellulose hydrolyzate mainly composed of five-carbon sugars (xylose, arabinose). After the hemicellulose dilute acid hydrolyzate is puri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K1/02C13K13/00
Inventor 卢艺芳陈海珊覃香香郭高志张厚瑞
Owner 谷创芯生物科技(厦门)有限公司
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