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Preparation of lignosulphonate graft copolymer chemical sand solidification agent

A technology of lignosulfonate and copolymer chemistry, applied in chemical instruments and methods, fertilizer mixtures, applications, etc., can solve problems such as environmental pollution and groundwater pollution, and achieve cost reduction, soil improvement, and strong wind erosion resistance Effect

Inactive Publication Date: 2009-05-27
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disclosed sand improving agent is directly prepared from papermaking waste liquid, and the papermaking waste liquid formed by different pulping methods contains a large amount of acid or alkali, inorganic salt and organic matter. If it is not treated, it can be directly prepared into sand fixing agent and used in desert In the process of treatment, there is no doubt that it will cause pollution to the environment, seep into the groundwater, and pollute the quality of the groundwater; the disclosed sand improver has not been widely used, and it may be related to its cohesiveness and flexibility, that is, wind erosion resistance and compressive strength. Human beings are very satisfied about

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 40g of lignosulfonate was dissolved in 90mL of water, 10mL of 0.2mol / L sodium hydroxide solution was added, and 8mL of propionaldehyde was added, and the reaction was carried out at a temperature of 60-70°C for 3h. After the completion of the reaction, the reaction mixture was concentrated by distillation, dried, and ground to obtain product I as a brown powder.

Embodiment 2

[0017] 40g lignosulfonate is dissolved in 90mL water, 24g vinyl acetate and 4mL 20% sodium hydroxide solution are added, the temperature is raised to 30℃, then 1.6mL 30% hydrogen peroxide aqueous solution is added as initiator, and the reaction is refluxed for 30min . After the reaction, the reaction mixture was concentrated by distillation, dried, and ground to obtain product II as a brown powder.

Embodiment 3

[0019] 40g of lignosulfonate was dissolved in 90mL of water, 10mL of 0.2mol / L sodium hydroxide solution was added, and 8mL of propionaldehyde was added. After reacting for 1h at a temperature of 60~70℃, 16mL of vinyl acetate was added, and then 1.1 mL of 30% hydrogen peroxide aqueous solution was added, and the reaction was refluxed for 1 h. After the reaction, the reaction mixture was concentrated by distillation, dried, and ground to obtain a brown powdery product III.

[0020] Dissolve products I, II and III in 40mL of water, stir evenly, and then use 25, 50, 75, 100g / m 2 The metering is evenly sprayed on 6.78×10 -3 m 2 On the surface of the sandy soil, after drying, the wind tunnel experiment adopts the horizontal direction and 30 degree angle direction to carry sand wind, and the equivalent amount is 25g / m 2 When the initial erosion wind speed in the horizontal direction of Product I is 10m / s, the initial erosion wind speed in the 30-degree direction is 8m / s; the initial eros...

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Abstract

The invention discloses a method for preparing a lignosulfonate graft copolymer chemical sand fixing agent. In the method, neutral papermaking waste liquid is evaporated and condensed; lignosulfonate in the neutral papermaking waste liquid is extracted; an aldehyde compound and an unsaturated acylamide, unsaturated acid or unsaturated ester compound are respectively or simultaneously used as reaction compositions; and the lignosulfonate is subjected to chemical modification to synthesize the serial lignosulfonate graft copolymer chemical sand fixing agent. The method has no environmental pollution, good water solubility, strong capacity for water erosion resistance and high compressive strength performance.

Description

Technical field [0001] The invention belongs to the technical field of lignosulfonate organic polymer chemical modification and utilization. Background technique [0002] There are more than 2,000 grass-based paper-making enterprises in my country. Due to their small scale, backward technology, and large consumption of raw materials and energy, most of the paper-making waste liquids of the enterprises have not been well treated and utilized, which has caused serious pollution to the ecological environment. . my country is one of the countries most seriously affected by desertification in the world. According to statistics, the country’s desertified land area has reached 1.74 million square kilometers, accounting for 18% of the country’s land area. The annual expansion of 2,460 square kilometers to the current 3,436 square kilometers directly affects the implementation of the national sustainable development strategy. Controlling land desertification and preventing wind and sand f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/18C08F289/00
Inventor 王来来董治宝赵水侠
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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