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

Method for catalytic activation of alkali lignin by Pd/SO4<2->/ZrO2

An alkali lignin, catalytic activation technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. The effect of enhancing activity and increasing content

Inactive Publication Date: 2016-05-04
NORTHEAST FORESTRY UNIVERSITY +2
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of low added value in the application of alkali lignin resources, improve the activity of the catalyst in the hydrogenation activation reaction of alkali lignin, and provide a Pd / SO 4 2- / ZrO 2 Method for catalytically activating alkali lignin

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
  • Method for catalytic activation of alkali lignin by Pd/SO4&lt;2-&gt;/ZrO2
  • Method for catalytic activation of alkali lignin by Pd/SO4&lt;2-&gt;/ZrO2
  • Method for catalytic activation of alkali lignin by Pd/SO4&lt;2-&gt;/ZrO2

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0009] Specific implementation mode one: this implementation mode is a kind of Pd / SO 4 2- / ZrO 2 The method for catalyzing and activating alkali lignin in papermaking black liquor is specifically completed according to the following steps:

[0010] One, the preparation of catalyst: ZrOCl 2 ·8H 2 O was added to distilled water to prepare ZrOCl with a mass concentration of 10% to 20%. 2 ·8H 2 O solution, to the ZrOCl 2 ·8H 2 Add concentrated ammonia water drop by drop to the O solution, stir, adjust the pH to 9-11, filter with suction after aging for 24 hours, wash the filter cake with water until there is no Cl, and obtain Zr(OH) 4 filter cake, the Zr(OH) 4 The filter cake is soaked in 1mol / L sulfuric acid solution for 12h, then suction filtered, dried at 110°C for 12h, pre-calcined at 200°C to 300°C for 0.5h, and calcined at 500°C to 600°C for 3h to obtain SO 4 2- / ZrO 2 , the SO 4 2- / ZrO 2 Add distilled water and stir, heat to 80°C, add PdCl dropwise 2 Hydroch...

specific Embodiment approach 2

[0020] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: wash the catalyst separated after 2h-6h of reaction in step 3 of specific embodiment 1, and put the separated catalyst at 200°C-300°C Calcined for 0.5h to obtain a catalytic reaction Pd / SO 4 2- / ZrO 2 Catalyst, use 0.25g~1g of said catalytic reaction Pd / SO 4 2- / ZrO 2 The catalyst replaces the Pd / SO described in step 1 in the specific embodiment 1 4 2- / ZrO 2 Catalyst 0.25g~1g, that is, use 0.25g~1g of the catalyst to react Pd / SO once 4 2- / ZrO 2 The catalyst replaces the Pd / SO described in step 3 in the specific embodiment 1 4 2- / ZrO 2 Catalyst 0.25g~1g, after the reaction is finished, the catalyst is separated. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment 3: The difference between this embodiment and specific embodiments 1 to 2 is: wash the separated catalyst with water after the reaction described in specific embodiment 2, and roast the separated catalyst at 200°C to 300°C for 0.5h , to obtain the catalytic reaction secondary Pd / SO 4 2- / ZrO 2 Catalyst, using 0.25g~1g of said catalytic reaction secondary Pd / SO 4 2- / ZrO 2 The catalyst replaces the Pd / SO described in step 1 in the specific embodiment 1 4 2- / ZrO 2 Catalyst 0.25g ~ 1g, that is, use 0.25g ~ 1g of the catalytic reaction of the secondary Pd / SO 4 2- / ZrO 2 The catalyst replaces the Pd / SO described in step 3 in the specific embodiment 1 4 2- / ZrO 2 Catalyst 0.25g~1g, after the reaction is finished, the catalyst is separated. Others are the same as the specific embodiment 1 to 2.

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 method for catalytic activation of alkali lignin by Pd / SO4<2-> / ZrO2, and relates to a method for activating alkali lignin in a papermaking black liquor. The purpose of the invention is to solve the problems of low content of active function groups, efficient activation method lacking and low application added values of present alkali lignin. The method comprises the following steps: preparing a Pd / SO4<2-> / ZrO2 catalyst, extracting the alkali lignin from the papermaking black liquor, and activating the alkali lignin in a reaction kettle. The method has the following advantages: 1, the catalyst Pd / SO4<2-> / ZrO2 is simple to prepare, has high catalytic activity, and can be repeatedly used 3-4 times, so the preparation cost is reduced; 2, reaction conditions are mild, the time is short, and the temperature is low, so energy consumption is saved; and 3, activated alkali lignin has a stable structure, the total hydroxyl content increases by 70-120%, and the phenolic hydroxyl group content increases by 30-50%, and the reaction activity is obviously improved. The method is mainly used for catalytic activation of the alkali lignin, improves the application added values of the catalytic activation of alkali lignin, and makes the natural polymeric renewable resource lignin be well applied.

Description

technical field [0001] The present invention relates to a kind of Pd / SO 4 2- / ZrO 2 Method for catalytically activating alkali lignin. Background technique [0002] Alkali lignin is a kind of industrial lignin, mainly from the pulp and paper industry, with an annual output of about 150-180 million tons. After the industrial treatment of high temperature and strong alkali, alkali lignin undergoes complex degradation and condensation reactions. Its methoxyl content is high, hydroxyl content is low, and its chemical reactivity is low. Only about 1% of alkali lignin in China is reused as organic chemical resources every year, mainly for the production of lignosulfonate, most of the rest are directly burned as heat sources, and the other part is discharged into the environment as pollutants, resulting in Huge waste of resources and environmental pollution. Pretreatment and activation of alkali lignin by hydrogenation reduction method can effectively increase the active funct...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00B01J27/053
Inventor 张盛明方桂珍马艳丽任世学
Owner NORTHEAST FORESTRY UNIVERSITY