Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of fructose hydrogenation copper-based catalyst

A copper-based catalyst, fructose technology, applied in catalyst activation/preparation, hydroxyl compound preparation, organic compound preparation and other directions, can solve the problems of low activity and harsh reaction conditions, and achieve high selectivity, mild reaction conditions, high active effect

Inactive Publication Date: 2018-09-28
ZHEJIANG UNIV OF TECH
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing copper-based catalysts used for the hydrogenation of fructose to prepare mannitol generally have the problems of low activity or harsh reaction conditions, which need to be improved and optimized

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of fructose hydrogenation copper-based catalyst
  • Preparation method of fructose hydrogenation copper-based catalyst
  • Preparation method of fructose hydrogenation copper-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of fructose hydrogenation copper-based catalyst comprises the steps:

[0033] 1. Add 5g Cu(NO 3 ) 2 .3H 2 O was dissolved in 100mL deionized water to form copper salt solution A; in solution A, Cu 2+ The molar concentration is 0.2mol / L; 10g of activated carbon carrier is added to copper salt solution A to form suspension B;

[0034] 2. Precipitating agent 2g NaHCO 3 Add 50mL of deionized water to dissolve to form alkaline solution C; the molar concentration of solution C is 0.8mol / L;

[0035] 3. At a temperature of 60°C, drop all the solution C into the suspension B, stir well in a 250mL three-neck flask, and adjust the pH value to 7. After the dropwise addition, keep the temperature constant and age for 2 hours to form slurry D;

[0036] 4. Filter the slurry D while it is hot, and wash it 5 times with deionized water to remove acid radical ions. Dry at a temperature of 85° C. for 10 h to obtain catalyst precursor E.

[0037] 5. Grinding t...

Embodiment 2

[0040] The preparation process of this embodiment is roughly similar to that of Example 1, the main difference being the alkaline precipitating agent in step 2, and the specific steps are as follows:

[0041] 1. Add 5g Cu(NO 3 ) 2 .3H 2 O is dissolved in 100ml deionized water to form copper salt solution A; in solution A, Cu 2+ The molar concentration is 0.2mol / L; 10g of activated carbon carrier is added to copper salt solution A to form suspension B;

[0042] 2. Precipitating agent 2.15gNa 2 CO 3 Dissolve in 50ml deionized water to form alkaline solution C; the molar concentration of solution C is 0.4mol / L.

[0043] 3. At a temperature of 60°C, drop all the solution C into the suspension B, stir well in a 250mL three-neck flask, and adjust the pH value to 7. After the dropwise addition, keep the temperature constant and age for 2 hours to form slurry D;

[0044]4. Filter the slurry D while it is hot, and wash it 5 times with deionized water to remove acid radical ions....

Embodiment 3

[0048] The preparation process of this embodiment is roughly similar to that of Example 2, the main difference being the alkaline precipitating agent in step 2, and the specific steps are as follows:

[0049] 1. Add 5gCu(NO 3 ) 2 .3H 2 O is dissolved in 100ml deionized water to form copper salt solution A; in solution A, Cu 2+ The molar concentration is 0.2mol / L; 10g of activated carbon carrier is added to copper salt solution A to form suspension B;

[0050] 2. Add 2.8g precipitant K 2 CO 3 Dissolve in 50ml deionized water to form alkaline solution C; the molar concentration of solution C is 0.4mol / L.

[0051] 3. At a temperature of 60°C, drop all the solution C into the suspension B, stir well in a 250mL three-neck flask, and adjust the pH value to 7. After the dropwise addition, keep the temperature constant and age for 2 hours to form slurry D;

[0052] 4. Filter the slurry D while it is hot, and wash it 5 times with deionized water to remove acid radical ions. Dry...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method and applications of a fructose hydrogenation copper-based catalyst. According to the preparation method, deposition-precipitation method is adopted in catalyst preparation. Different alkaline precipitating agents, copper salt solution, and oxide carriers are adopted to prepare a precursor substance; filtering, washing, and drying are carried out, and the precursor substance is grinded into powder; at air atmosphere, roasting is carried out in a muffle furnace at 300 to 450 DEG C so as to obtain an oxide; the oxide is introduced into a tubular furnace, at hydrogen atmosphere, reduction is carried out at 200 to 300 DEG C so as to obtain the loaded type copper-based catalyst. In applications, certain amounts of the copper-based catalyst, water, anorganic solvent, and fructose can be prepared for reaction so as to obtain mannitol; the copper-based catalyst is high in dispersion degree, small in particle size, and relatively high in catalytic activity. The copper-based catalyst is used in fructose hydrogenation preparation of mannitol, the hydrogenation conditions are mild, the catalytic stability and selectivity are high, the catalyst preparation cost is low, and the application value is high.

Description

technical field [0001] The invention relates to the technical field of preparation of mannitol, in particular to the preparation and application of a copper-based catalyst for fructose hydrogenation. Background technique [0002] Mannitol is a kind of hexanehexyl alcohol, because it absorbs heat when dissolved, has a sweet taste, and has a comfortable feeling to the mouth, so it is widely used in the manufacture of chewable tablets such as sober medicines and mouth fresheners. It is also a hypertonic tissue dehydrating agent, clinically used in the treatment of cerebral edema and glaucoma; in the prevention of acute renal failure, to accelerate the excretion of poisons and drugs from the kidney; in the treatment of hypertension as a vasodilator. In recent years, the demand for mannitol has greatly increased due to its diverse applications in medical, food, cosmetics, etc. How to increase the production of mannitol needs further research. [0003] At present, there are two ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/72B01J37/03B01J37/08B01J37/18C07C29/145C07C31/26B01J23/80B01J23/83
CPCC07C29/145B01J23/72B01J23/80B01J23/83B01J37/035B01J37/082B01J37/18B01J35/394B01J35/393C07C31/26
Inventor 严新焕胡凤腾
Owner ZHEJIANG UNIV OF TECH