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Method for preparing D-xylose and L-arabinose by recycling phosphoric acid

A technology of arabinose and resource utilization, applied in the field of functional sugar, can solve problems such as difficulty in industrialization, large demand for resin, and environmental pollution, and achieve the effects of reduced production costs, high equipment stability, and low environmental pollution

Active Publication Date: 2013-05-01
广西轻工业科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 200910039185.6 discloses a method for preparing plant hemicellulose hydrolyzate and extracting xylose and arabinose. In the production process, a large amount of organic solvents are used, the production cost is high, the environment is easy to be polluted, and the operation is complicated and difficult to realize. industrialization
[0004] Domestic production of D-xylose and L-arabinose is now mainly concentrated in the north, mostly using crop waste such as corn cobs and corn husks as raw materials. The acid used for the hydrolysis of D-xylose and L-arabinose prepared by industrial acid method is Sulfuric acid, currently due to environmental protection pressure, there is a tendency to use hydrochloric acid instead. Desalination by ion exchange requires multiple anion and cation exchange resins to meet the requirements. The demand for resin is large, and a large amount of purified water is required for cleaning, and a large amount of acid is consumed for regeneration. Alkali, produces a lot of waste liquid, and the operation is cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The method for preparing D-xylose and L-arabinose by utilizing phosphoric acid as a resource is as follows:

[0032] 1. Hydrolysis of raw materials:

[0033] The bagasse was hydrolyzed by adding phosphoric acid with a mass percentage concentration of 3.0%, the solid-to-liquid ratio kg / L of bagasse and phosphoric acid was 1:10, the hydrolysis temperature was 110°C, and the hydrolysis time was 5 hours.

[0034] After the hydrolysis is completed, a hydrolyzed mixture is obtained, and the hydrolyzed mixture is filtered to obtain a hydrolyzed solution.

[0035] 2. Phosphate precipitation in hydrolyzate:

[0036] Add lime milk to the hydrolyzate for neutralization and precipitation, adjust the pH to 4.5, and obtain the neutralized hydrolyzate and precipitation (ie, phosphate precipitation). After the pH is stabilized, solid-liquid separation is carried out, the precipitate (ie, phosphate precipitation) is recovered, and the hydrolysis after neutralization is further purifie...

Embodiment 2

[0047] The method for preparing D-xylose and L-arabinose by utilizing phosphoric acid as a resource is as follows:

[0048] 1. Hydrolysis of raw materials:

[0049] The sugarcane pith was hydrolyzed by adding phosphoric acid with a mass percentage concentration of 8.0%. The solid-to-liquid ratio kg / L of sugarcane pith and phosphoric acid was 1:1, the hydrolysis temperature was 130°C, and the hydrolysis time was 1h.

[0050] After the hydrolysis is completed, a hydrolyzed mixture is obtained, and the hydrolyzed mixture is filtered to obtain a hydrolyzed solution.

[0051] 2. Phosphate precipitation in hydrolyzate:

[0052] Add lime milk to the hydrolyzate for neutralization and precipitation, adjust the pH to 7.2, and obtain the neutralized hydrolyzate and precipitation (ie, phosphate precipitation). After the pH is stabilized, solid-liquid separation is carried out, the precipitate (ie, phosphate precipitation) is recovered, and the hydrolysis after neutralization is further...

Embodiment 3

[0063]The method for preparing D-xylose and L-arabinose by utilizing phosphoric acid as a resource is as follows:

[0064] 1. Hydrolysis of raw materials:

[0065] Sugarcane leaves were hydrolyzed by adding phosphoric acid with a mass percentage concentration of 5.0%. The solid-to-liquid ratio kg / L of sugarcane leaves and phosphoric acid was 1:5, the hydrolysis temperature was 121°C, and the hydrolysis time was 4 hours.

[0066] After the hydrolysis is completed, a hydrolyzed mixture is obtained, and the hydrolyzed mixture is filtered to obtain a hydrolyzed solution.

[0067] 2. Phosphate precipitation in hydrolyzate:

[0068] Add lime milk to the hydrolyzate for neutralization and precipitation, adjust the pH to 5.0, and obtain the neutralized hydrolyzate and precipitation (ie, phosphate precipitation). After the pH is stabilized, solid-liquid separation is carried out, the precipitate (ie, phosphate precipitation) is recovered, and the hydrolysis after neutralization is fu...

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Abstract

The invention discloses a method for preparing D-xylose and L-arabinose by recycling phosphoric acid. With bagasse, bagasse pith or sugarcane tops as raw materials, the D-xylose and the L-arabinose are prepared by hydrolyzing the raw materials, precipitating phosphate radicals of hydrolysate and purifying; and with combination of a cane sugar manufacture process, after being subjected to acid dissolution treatment, phosphate radical precipitates are added into cane juice as a processing aid, which is obliged to be used in the cane sugar manufacture process, for recycling. The method disclosed by the invention is good for environment protection and recycling in the cane sugar manufacture industry, and compared with an xylose production method adopting sulfuric acid or hydrochloric acid at present, the method has the advantages of no hydrolytic acid pollution, simplicity and convenience in process operation, high yield of the D-xylose and L-arabinose, and low cost, and is suitable for industrial production and good for solving the problem of bottleneck restriction of environment pollution in xylose production.

Description

technical field [0001] The invention belongs to the technical field of functional sugar, and in particular relates to environmental protection and resource recycling in the sugarcane sugar industry. Specifically, it is a method for preparing D-xylose and L-arabinose by utilizing phosphoric acid as resources. Background technique [0002] D-xylose belongs to the five-carbon aldose and has good biological functions, such as not being digested by the human body and having no energy, it can be used as a non-caloric sweetener, suitable for obese people and diabetic patients, activating bifidobacteria in the human intestinal tract and Promote its growth, improve the microenvironment of the human body, and improve human immunity; it is not used by oral microorganisms, has some physiological functions of dietary fiber, can reduce serum cholesterol, and has a good health care function. L-arabinose is also a rare functional sugar, which has the functions of suppressing obesity, assis...

Claims

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Application Information

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IPC IPC(8): C13K13/00C07H3/02C07H1/08
Inventor 雷光鸿魏承厚姜毅罗左青姚晓麦王元春曹敏梁智李坚斌扈胜禄
Owner 广西轻工业科学技术研究院有限公司
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