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

Method for improving glucose hydrogenation efficiency

A hydrogenation efficiency and glucose technology, which is applied in the field of improving glucose hydrogenation efficiency, can solve the problems of increased hydrogenation reaction time, decreased catalyst activity, and low hydrogenation efficiency, achieving stable activity, reduced steam costs, and reduced electricity costs.

Pending Publication Date: 2020-02-28
ZHEJIANG HUAKANG PHARMA
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for improving the hydrogenation efficiency of glucose, so as to solve the problem in the prior art that in the process of hydrogenation of glucose, as the temperature increases, the pH continues to decrease, the catalyst is in an acidic environment, and nickel is lost. , the activity of the catalyst decreases, the hydrogenation reaction time increases, and the hydrogenation efficiency is low

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first embodiment of the method for improving glucose hydrogenation efficiency of the present invention comprises the following steps:

[0023] (11) Feed: Add the catalyst mixed solution, 55% glucose solution with a pH of 6.2 to the hydrogenation tank, and the feed volume is 6.8 cubic meters.

[0024] (12) Hydrogenation: heat up and hydrogenate the glucose solution in step (11), control the pressure at 7.5MPa, and control the temperature at 140°C. When the temperature is 136.5°C, start injecting alkali at a rate of 4.4L / min for 17min. The hydrogenation time was 210min.

[0025] (13) Discharging: After completing the follow-up process, the hydrogenated glucose solution is obtained by discharging.

Embodiment 2

[0027] The second embodiment of the method for improving glucose hydrogenation efficiency of the present invention includes the following steps:

[0028] (21) Feed material: Add catalyst mixed liquid, 55% glucose solution with a pH of 6.2 to the hydrogenation tank, and the feed volume is 6.8 cubic meters.

[0029] (22) Hydrogenation: heat up and hydrogenate the glucose solution in step (21), control the pressure at 7.5MPa, and control the temperature at 140°C. When the temperature is 130°C, start injecting alkali at a rate of 4.4L / min for 17min. The hydrogenation time was 210min.

[0030] (23) Discharging: After completing the follow-up process, the hydrogenated glucose solution is obtained by discharging.

Embodiment 3

[0039] The third embodiment of the method for improving glucose hydrogenation efficiency of the present invention includes the following steps:

[0040] (31) Feed: Add the catalyst mixed solution, 55% glucose solution with a pH of 6.2 to the hydrogenation tank, and the feed volume is 6.8 cubic meters.

[0041] (32) Hydrogenation: heat up and hydrogenate the glucose solution in step (31), control the pressure at 7.5MPa, control the temperature at 140°C, inject alkali at a temperature of 136.5°C, and inject alkali at 2.3L / min and 2.9L / min respectively min, 3.2L / min, alkali injection time is 17min, hydrogenation time is 210min.

[0042] (33) Discharging: The glucose solutions at different alkali injection speeds are processed separately and then discharged to obtain glucose hydrogenation solutions at different alkali injection speeds.

[0043] The above-mentioned hydrogenated glucose solution prepared at different alkali injection speeds was measured, and the conversion rate of ...

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 relates to a method for improving the hydrogenation efficiency of glucose, and the method comprises the following steps: adding a catalyst mixed solution and a glucose solution into a hydrogenation tank, heating for hydrogenation, injecting an alkali at the speed of 2L / min-5L / min in the heating process, regulating the pH value of the solution in the tank to 6.6-7.5; and continuouslyfinishing hydrogenation to obtain a glucose hydrogenated solution. According to the method, the catalyst consumption is reduced, the reaction time is shortened, the glucose hydrogenation capacity is improved, and meanwhile the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of producing sorbitol from glucose, in particular to a method for improving the hydrogenation efficiency of glucose. Background technique [0002] Glucose, many basic chemicals such as sorbitol, lactic acid, levulinic acid, etc. can be obtained by physical, chemical and biological methods. Among them, sorbitol, as a high value-added compound, has been widely used in food, medicine, daily chemical and other industries. [0003] In industrial production, the Raney-Ni catalyst is mainly used to catalyze the hydrogenation of glucose to prepare sorbitol. The catalyst is characterized by high activity in neutral and weakly alkaline environments. In an acidic environment, nickel will be lost and the catalyst activity will decrease. At the same time, because glucose will partially isomerize into fructose under alkaline conditions, it will produce fructose after hydrogenation. Mannitol and other by-products, so the...

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): C07C29/14C07C31/26
CPCC07C29/14
Inventor 陈德水谢绍勋汪秀秀毛学军安延龙程新平廖承军罗家星
Owner ZHEJIANG HUAKANG PHARMA