Method for preparing biomass retarder from agricultural wastes, and application of biomass retarder

A technology for agricultural waste and biomass, which is applied in the field of high-value conversion of agricultural waste and its utilization, can solve the problems of high price of aminotrimethylidene phosphate, insoluble cellulose derivatives, and restrictions on large-scale use, and achieves water solubility. Good performance, simple and easy solid-liquid separation process, and low cost

Pending Publication Date: 2021-12-10
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The retarders currently on the market are mainly organic molecules, mainly including lignosulfonates, hydroxycarboxylic acids, organic and inorganic phosphates, polyols and their derivatives, sugars and carbohydrates, etc. There are certain problems in the process of using the agent, such as the high cost of white sugar, the extraction process is easy to cause environmental pollution; The high price of fork phosphoric acid limits its large-scale use in engineering

Method used

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  • Method for preparing biomass retarder from agricultural wastes, and application of biomass retarder
  • Method for preparing biomass retarder from agricultural wastes, and application of biomass retarder
  • Method for preparing biomass retarder from agricultural wastes, and application of biomass retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Take 50g of agricultural straw and transfer it to a 500mL stainless steel ball mill container, control the mass ratio of stainless steel beads to agricultural straw to 50:1, and then keep forward rotation and reverse rotation at a speed of 600r / min for 1h, The forward and reverse cycles were switched 6 times, and the ball milling time was set at 12 hours. After stopping, cool to room temperature, separate the straw and steel balls, and obtain straw powder.

[0036] (2) Transfer the 50g straw powder after the ball milling to a 500mL stainless steel reactor, add 100mL water and 2.5g FAU molecular sieve-supported nickel catalyst (transmission electron microscope photo as shown in image 3 shown), keep the mass ratio of catalyst, straw and water at 0.05:1:2, and stop the reaction at 170°C for 2 hours.

[0037] (3) After the above-mentioned wet hydrolysis product is cooled to room temperature, it is suction-filtered under normal temperature and pressure conditions, and t...

Embodiment 2

[0041] (1) Take 50g of agricultural straw and transfer it to a 500mL stainless steel ball mill container, control the mass ratio of stainless steel beads to agricultural straw to 50:1, and then keep forward rotation and reverse rotation at a speed of 600r / min for 1h, The forward and reverse cycles were switched 6 times, and the ball milling time was set at 12 hours. After stopping, cool to room temperature, separate the straw and steel balls, and obtain straw powder.

[0042](2) Transfer 50g of straw powder after ball milling to a 500mL stainless steel reactor, add 100mL of water and 2.5g of nickel catalyst supported by FAU molecular sieves, keep the mass ratio of catalyst, straw, and water at 0.05:1:2. The reaction was stopped after 2 h at the temperature of ℃.

[0043] (3) After the above-mentioned wet hydrolysis product is cooled to room temperature, it is suction-filtered under normal temperature and pressure conditions, and the liquid and solid catalyst are separated to o...

Embodiment 3

[0047] (1) Take 50g of agricultural straw and transfer it to a 500mL stainless steel ball mill container, control the mass ratio of stainless steel beads to agricultural straw to 50:1, and then keep forward rotation and reverse rotation at a speed of 600r / min for 1h, The forward and reverse cycles were switched 6 times, and the ball milling time was set at 12 hours. After stopping, cool to room temperature, separate the straw and steel balls, and obtain straw powder.

[0048] (2) Transfer 50g of straw powder after ball milling to a 500mL stainless steel reactor, add 100mL of water and 2.5g of nickel catalyst supported by FAU molecular sieves, keep the mass ratio of catalyst, straw, and water at 0.05:1:2, at 200 The reaction was stopped after 2 h at the temperature of ℃.

[0049] (3) After the above-mentioned wet hydrolysis product is cooled to room temperature, it is suction-filtered under normal temperature and pressure conditions, and the liquid and solid catalyst are separa...

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PUM

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Abstract

The invention provides a method for preparing a biomass retarder from agricultural wastes, and application of the biomass retarder. The method comprises the following steps: 1) performing high-energy ball milling on the agricultural wastes to obtain agricultural waste powder; 2) carrying out directional wet degradation on the agricultural wastes obtained in the step 1) through a metal-loaded solid acid catalyst; and 3) carrying out solid-liquid separation on the wet decomposition product to obtain the liquid biomass retarder, and recovering the catalyst at the same time. The biomass retarder prepared by the invention is good in water solubility, green, degradable, excellent in performance and low in cost, the whole production process is low in energy consumption and small in pollution, and the biomass retarder can be used as a cement retarder in cement admixtures. The invention provides a feasible technical path for high-value utilization of agricultural wastes and application of the agricultural wastes in the field of construction industry.

Description

technical field [0001] The invention relates to the field of high-value transformation of agricultural waste and its utilization, in particular to a method for preparing a biomass retarder by utilizing agricultural waste and its application. Background technique [0002] Biomass has attracted more and more attention because of its low toxicity, high biodegradability and sustainability. The rational use of biomass in agricultural waste is conducive to the construction of a clean and low-carbon energy system. Goals are very helpful. Nowadays, the treatment of agricultural wastes is still mainly done by returning to the field and disorderly incineration. The problems of environmental pollution and waste of resources caused by the process are becoming more and more serious. Agricultural waste such as straw is a carbon-containing organic macromolecular functional body in terms of component structure. It is a porous structure formed by tightly winding hemicellulose, lignin, and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/22
CPCC04B40/0039C04B2103/22C04B24/383C04B24/38C04B24/00
Inventor 张志杨屈浩杰肖清波徐文龙胡米
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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