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Method for joint production of capacitive carbon and high-purity cellulose

A technology of joint production and cellulose, applied in the field of material science, can solve the problems of complex source of papermaking raw materials, high ash content, and complex composition of alkali lignin.

Pending Publication Date: 2021-12-03
上海赛普瑞特生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically speaking, capacitor carbon can be made from alkali lignin in papermaking black liquor, but the papermaking industry uses a variety of alkali raw materials, such as caustic soda, sodium sulfide, sodium sulfite, etc. The sources of papermaking raw materials are complicated, and inevitably contain impurities such as sediment and iron filings , it is difficult to control, resulting in complex alkali lignin components and high ash content in black liquor, making it impossible to produce high-quality capacitor carbon

Method used

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  • Method for joint production of capacitive carbon and high-purity cellulose
  • Method for joint production of capacitive carbon and high-purity cellulose
  • Method for joint production of capacitive carbon and high-purity cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] With the bagsee of the Guangxi Rural Reclamation Bureau Mingyang Paper Plant, the potassium hydroxide (KOH) is extracted with alkaline lumen reagents, potassium carbonate (K 2 CO 3 The alkaline salt activator of the capacitor carbon, the urea is a token, indicating the specific operation steps and results of the first embodiment. KOH is more expensive than NaOH, but as the active agent is much better than NaOH, because the capacitor carbon is a high value product, the activator can be recovered, so the KOH pulping is calculated. Most of KOH in the pulping process has been converted to K 2 CO 3 , Truly activation is k 2 CO 3 .

[0104] (1) Subsence of the base separation

[0105] With the bagsee of the Guangxi Rural Reclamation Bureau Mingyang Paper Plant, the powder and debris are sieved, weigh 100 grams of 500 ml of tapered flask, add 500 g of KOH solution (including 20 grams KOH), The gauze is heated in a 125oC oven for 10 hours, and the water is added 4 times. After remo...

Embodiment 2

[0127] Mill bagasse pith is separated from the bagasse was not waste paper, accounting for about 35% of the bagasse pith short fibers in powder form, not paper, it is usually discarded as waste. In the present embodiment pith as raw material, sodium hydroxide (NaOH) to extract lignin alkali agent, sodium carbonate (Na 2 CO 3 ) Salts of alkaline activators capacitor carbon, urea as co-activator, specific procedures and results of Example 2. Cheaper than NaOH KOH, is commonly used in pulping agent, a base in the cooking and pith lignin carbonization converted mainly Na 2 CO 3 , Can also act as a basic salt activator.

[0128] (1) Alkaline separated pith

[0129] Yang Ming Guangxi Bureau of Reclamation pith mill waste as raw material, wherein the screening and debris powder, weighed 100 g pith short fibers placed in a 2000ml Erlenmeyer flask, 500 g of 4% NaOH solution ( containing 20 g of NaOH), yarn inlet Bouza heated oven at 125ºC for 10 hours, water was added intermediate 4, taken...

Embodiment 3

[0151] In the first embodiment two embodiments, to a base KOH and NaOH as separate lignin and cellulose reagent to K 2 CO 3 Na 2 CO 3 As basic salts capacitance carbon activator, and finally recovering the K 2 CO 3 Na 2 CO 3 . This embodiment with K 2 CO 3 Both as lignin - cellulose separating agent, and as an alkaline salt activator capacitor carbon, K is finally recovered 2 CO 3 Full cycle, separation agents may be salts of alkali activator and reuse.

[0152] (1) Alkaline separating bagasse

[0153] In pith Yang Ming Guangxi Bureau of Reclamation paper mill as a raw material, wherein the screening and debris powder, weighed 100 g placed in a 2000ml Erlenmeyer flask, 500 g of 4% K 2 CO 3 Solution (containing 20 g of K 2 CO 3 ), Yarn inlet Bouza heated oven at 125ºC for 10 hours, water was added intermediate 4, taken after centrifugation, the filtrate is the base for extracting lignin, cellulose residues for purification.

[0154] Extraction (2) an alkali lignin

[0155] The alka...

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Abstract

The invention relates to the technical field of material science, in particular to a method for joint production of capacitance carbon and high-purity cellulose by taking biomass as a raw material. The method comprises the following steps: 1) cooking bagasse in alkali liquor; 2) filtering the bagasse cooking liquor obtained in the step 1), separating cellulose, and cleaning to obtain pure cellulose; 3) drying and grinding the alkali lignin solution obtained by filtering in the step (2) to obtain alkali lignin powder; 4) mixing the alkali lignin powder provided in the step 3) with an alkaline salt activator and an auxiliary activator, aging, carbonizing-activating, and post-processing to obtain capacitor carbon; and 5) recovering the alkaline salt activating agent from the washing filtrate obtained in the post-treatment step in the step (4), and circularly using the alkaline salt activating agent in the step (4) and the step (1). According to the method, high-value co-production of the capacitor carbon and the cellulose can be realized, and in the technical line, the alkali is a reagent for separating bagasse cellulose and lignin and is also an activating agent for firing the capacitor carbon, so that one alkali can be used for two purposes and can be recycled.

Description

Technical field [0001] The present invention relates to the technical field of materials science, in particular, relates to a method in a capacitive charcoal and biomass as a feedstock in the production of high purity cellulose joint. Background technique [0002] Due to the excellent performance in fast super capacitor to store and discharge electrical energy in the power market demand and industrial scale in the rapidly growing demand for high quality carbon capacitance is growing. Recent studies have found that the quality of the produced lignin capacitance is much higher than other types of carbon materials, such as plant material (bamboo, coconut shell, husk), coal (or oil) and a synthetic resin raw material. Lignin is a natural polymer of plant origin, the advantages of both plant material and the resin material, there are many excellent properties than the other capacitive carbon material may be employed a new method for carbonization and activation. Originally soda lignin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/324D21C5/00H01G11/34H01G11/44H01G11/24
CPCC01B32/348C01B32/324D21C5/00H01G11/34H01G11/44H01G11/24
Inventor 翁千越
Owner 上海赛普瑞特生物科技有限公司
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