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Composite sulfate catalyst for biosaccharide preparation, preparation method and application

A sulfate and catalyst technology, which is applied in the field of composite sulfate catalysts, can solve problems affecting aluminum-based composite sulfate catalysts, easy loss of sulfur-containing groups, and reduced catalytic activity, so as to improve catalytic performance, save production time, and disperse good sex effect

Active Publication Date: 2022-08-09
SYNGARS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the traditional high-value biological sugar production process, acid catalysis is often used, which involves food safety, hygiene and environmental protection issues. The new composite sulfate catalyst is very popular in this field. Among the existing composite sulfate catalysts, SO 4 2- / M x o y There are many types of applications, which have good selectivity, no pollution, no corrosion, and can be reused, especially aluminum-based materials. Aluminum has low cost, stable chemical properties, and many applications; but there are still some problems: for example, the specific surface area is small, which reduces the Catalytic activity; or the sulfur-containing group is easy to lose, the activity fails quickly, and the repeatability is poor; the above problems seriously affect the development of aluminum-based composite sulfate catalysts

Method used

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  • Composite sulfate catalyst for biosaccharide preparation, preparation method and application
  • Composite sulfate catalyst for biosaccharide preparation, preparation method and application
  • Composite sulfate catalyst for biosaccharide preparation, preparation method and application

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Embodiment 1

[0034] The present embodiment discloses a liquid-phase preparation method of a composite sulfate catalyst for the preparation of biological sugar, which includes the following steps: adding graphene oxide and hydrazine in a ratio of 1:1.5 into a reaction kettle, ultrasonically dispersing for 2 hours, and then heating to a 100 ℃, react for 4 hours, get graphene precipitate, wash the precipitate with absolute ethanol three times, add 3 times of water again, super-dispersion to obtain graphene suspension;

[0035] At a temperature of 60 °C, drop sodium hydroxide into the aluminum nitrate solution, the molar ratio of the two is 1:1, and react for 30 min, and the aluminum hydroxide solution is added to the graphene suspension to ensure that the molar ratio of graphene to aluminum is 1:1.6, stirred at room temperature for 24 hours, precipitated and filtered, washed with absolute ethanol, and dried at 120 °C to obtain the precursor AL-O-GN; the precursor was added to concentrated sulf...

Embodiment 2

[0038] The present embodiment discloses a liquid-phase preparation method of a composite sulfate catalyst for the preparation of biological sugar, which includes the following steps: adding graphene oxide and hydrazine in a ratio of 1:1.5 into a reaction kettle, ultrasonically dispersing for 2 hours, and then heating to a 100 ℃, react for 4 hours, get graphene precipitate, wash the precipitate with absolute ethanol three times, add 3 times of water again, super-dispersion to obtain graphene suspension;

[0039] At a temperature of 60 °C, drop sodium hydroxide into the aluminum nitrate solution, the molar ratio of the two is 1:1, and react for 30 min, and the aluminum hydroxide solution is added to the graphene suspension to ensure that the molar ratio of graphene to aluminum is 1:1.3, stirred at room temperature for 24 hours, precipitated and filtered, washed with absolute ethanol, and dried at 120 °C to obtain the precursor AL-O-GN; the precursor was added to concentrated sulf...

Embodiment 3

[0041] The present embodiment discloses a liquid-phase preparation method of a composite sulfate catalyst for the preparation of biological sugar, which includes the following steps: adding graphene oxide and hydrazine in a ratio of 1:1.5 into a reaction kettle, ultrasonically dispersing for 2 hours, and then heating to a 100 ℃, react for 4 hours, get graphene precipitate, wash the precipitate with absolute ethanol three times, add 3 times of water again, super-dispersion to obtain graphene suspension;

[0042] At a temperature of 60 °C, drop sodium hydroxide into the aluminum nitrate solution, the molar ratio of the two is 1:1, and react for 30 min, and the aluminum hydroxide solution is added to the graphene suspension to ensure that the molar ratio of graphene to aluminum is 1:1.0, stirred at room temperature for 24 hours, precipitated and filtered, washed with anhydrous ethanol, and dried at 120 °C to obtain the precursor AL-O-GN; the precursor was added to concentrated sulfu...

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Abstract

The invention discloses a liquid-phase preparation method of a composite sulfate catalyst for biological sugar preparation, comprising the following steps: S1, preparing a graphene suspension; S2, dropping sodium hydroxide into nitric acid at a temperature of 40°C to 80°C The aluminum solution obtains liquid aluminum hydroxide, the aluminum hydroxide is added to the graphene suspension under stirring conditions, and the aluminum hydroxide is embedded in the graphene through metal bonds; filtering, washing, and drying to obtain the precursor AL-O-GN; S3, The precursor is added to concentrated sulfuric acid to combine sulfate radicals, filtered and dried; S4, calcined to obtain SO 4 2‑ / Al‑O‑GN solid acid; the invention also discloses SO 4 2‑ / Al‑O‑GN solid acid and SO 4 2‑ / Al-O-GN solid acid is applied to L-lyxose catalysis; the composite sulfate obtained by the liquid phase environment is beneficial to the uniform and sufficient combination of graphene and aluminum hydroxide, and is beneficial to increase the specific surface area of ​​the solid acid catalyst , improve the catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of composite sulfate catalysts, and in particular relates to a composite sulfate catalyst for biological sugar preparation, a liquid phase preparation method and applications. Background technique [0002] In the traditional production process of high-value biological sugars, acid catalysis is often used, which involves food safety, hygiene and environmental protection issues. New composite sulfate catalysts are very popular in this field. Among the existing composite sulfate catalysts, SO 4 2- / M x O y It has many applications, it has good selectivity, no pollution, no corrosion, and can be reused, especially aluminum-based materials. Aluminum has low cost, stable chemical properties, and many applications; but there are still some problems: such as small specific surface area, reducing Catalytic activity; or the sulfur-containing groups are easily lost, the activity fails quickly, and the repeatability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053B01J35/10B01J37/08C07H3/02C07H1/00
CPCB01J27/053B01J35/1023B01J37/082C07H3/02C07H1/00Y02P20/584
Inventor 陈红辉黄强蒋新明
Owner SYNGARS TECH CO LTD
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