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Method for preparing trans-ferulaic acid, p-cumaric acid and pentosan

A technology of trans-ferulic acid and pentosan, applied in the preparation of acyl halide, organic chemistry, etc., can solve the problem of many impurities, and achieve the effects of high purity of phenolic acid, reduction of waste liquid discharge, and reduction of usage.

Inactive Publication Date: 2009-01-07
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both can be extracted by alkali treatment, but because the impurities produced by alkali hydrolysis are more, the purification becomes the bottleneck of preparing ferulic acid and coumaric acid from fiber, the key of the present invention is to solve the purification problem

Method used

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  • Method for preparing trans-ferulaic acid, p-cumaric acid and pentosan
  • Method for preparing trans-ferulaic acid, p-cumaric acid and pentosan

Examples

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Embodiment 1

[0035] The present invention will be described in further detail below in conjunction with the embodiments, but the implementation of the present invention is not limited thereto. Embodiment 1: utilize bagasse to prepare trans-ferulic acid, p-coumaric acid and pentosan

[0036] (1) Pretreatment of raw materials: bagasse is dried and pulverized;

[0037] (2) Dilute alkali treatment releases p-coumaric acid:

[0038] The pretreated raw materials are soaked in a 0.5% sodium hydroxide solution with a mass concentration of 0.5% according to a solid-to-liquid ratio of 1g: 10ml, stirred continuously, treated at 15°C for 24 hours, filtered, and the filter residue is used for later use;

[0039] The obtained filtrate is concentrated to 1 / 20 of the volume of the original low-concentration alkaline hydrolysis solution with an ultrafiltration device with a molecular weight cut-off of 5000, and the concentrated solution is used to prepare pentosan, and the permeate is used for subsequent ...

Embodiment 2

[0051] The concentrated solution described in step (2) or (4) is neutralized to pH5 with a mass concentration of 1% hydrochloric acid or sulfuric acid, centrifuged, and ethanol is added to the supernatant until the final ethanol volume concentration is 50%, filtered or centrifuged, and the precipitate is Pentosan. Example 2: Utilization of corncob trans-ferulic acid, p-coumaric acid and pentosan

[0052] (1) Pretreatment of raw materials: corncobs are dried and pulverized;

[0053] (2) Dilute alkali treatment releases p-coumaric acid:

[0054] The pretreated raw material is soaked in sodium hydroxide with a mass concentration of 0.8% according to the solid-to-liquid ratio of 1g: 15ml, stirred continuously, treated at 60°C for 4 hours, filtered, and the filter residue is set aside;

[0055] The obtained filtrate is concentrated to 1 / 40 of the volume of the original low-concentration alkaline hydrolysis solution with an ultrafiltration device with a molecular weight cut-off of...

Embodiment 3

[0068] Example 3: Preparation of trans-ferulic acid, p-coumaric acid and pentosan by straw

[0069] (1) Pretreatment of raw materials: drying and crushing of straw;

[0070] (2) Dilute alkali treatment releases p-coumaric acid:

[0071] Soak the pretreated raw material in a 0.6% mass concentration potassium hydroxide solution according to a solid-to-liquid ratio of 1g: 12ml, stir continuously, and process at 30°C for 14 hours, filter, and filter residue for subsequent use;

[0072] The obtained filtrate is concentrated to 1 / 30 of the volume of the original low-concentration alkaline hydrolysis solution with an ultrafiltration device with a molecular weight cut-off of 20,000. The concentrated solution is used to prepare pentosan, and the permeate is used for subsequent use;

[0073] (3) Obtaining p-coumaric acid:

[0074] Resin and step (2) permeated liquid were stirred and adsorbed in a stirring tank for 5 hours according to the volume concentration 1: 130, the resin was sep...

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Abstract

The invention relates to a method for simultaneously preparing trans-ferulic acid, p-coumaric acid and pentosan, which comprises the following steps: processing a cellulose material with a low-concentration alkali to release coumaric acid, and hydrolyzing with a high-concentration alkali to release ferulic acid and pentosan; ultrafiltering the alkaline hydrolytic solution, precipitating the concentrated solution with ethanol to obtain pentosan; and adsorbing coumaric acid and ferulic acid in the filtrate with cation exchange resin, eluting with an ethanol-acid-water mixed eluent, removing ethanol from the eluent, crystallizing, centralizing or filtering the eluent at a low temperature or a normal temperature to obtain ferulic acid or coumaric acid crystals, and recrystallizing to obtain the high-purity product. The alkaline hydrolytic solution can be recovered and used for hydrolyzing the material, thereby obviating the production of a great amount of wastewater due to the alkaline hydrolysis. The method can produce ferulic acid and coumaric acid widely used in the industries of food, medicine and cosmetics, and pentosan used for producing xylooligosaccharide as food gum by utilizing solid wastes produced in agricultural and food processing, thereby achieving significant economic and social meanings.

Description

technical field [0001] The invention relates to a method for simultaneously preparing trans-ferulic acid, p-coumaric acid and pentosan from bagasse, corn husk, wheat bran, rice bran, rice straw, wheat straw and other fibrous raw materials by alkaline hydrolysis, and the alkali solution can be recycle. Background technique [0002] Ferulic acid is widely used in medicine, food, cosmetics and other fields. As a medicine, it has anti-inflammatory, pain-relieving, anti-thrombosis, anti-ultraviolet radiation, anti-free radical, regulating human immune function, regulating endocrine, improving microcirculation and anti-fatigue effects. It is clinically used for the treatment of coronary heart disease, cerebrovascular disease, vasculitis, leukopenia and thrombocytopenia and other diseases. It can be used as preservative and antioxidant in food, and it is also the active ingredient of sports food and some health food. In cosmetics, it has the function of absorbing ultraviolet ray...

Claims

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Application Information

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IPC IPC(8): C07C59/64C07C59/52C07C51/58C08B37/00
Inventor 欧仕益丁胜华赵健王远汪勇黄雪松晏日安
Owner JINAN UNIVERSITY
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