Novel environment-friendly high-molecular sand solidification agent and preparation method thereof

A technology of polymer and sand-fixing agent, applied in chemical instruments and methods, other chemical processes, applications, etc., can solve problems such as environmental pollution and waste of resources, and achieve the effect of enhancing the growth trend, short reaction period, and beneficial to growth.

Active Publication Date: 2017-12-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pulping and papermaking waste liquid contains a large amount of lignin, and the discharge of waste liquid not only causes serious environmental pollution, but also leads to a large amount of waste of resources, so it is urgent to effectively recycle lignin in papermaking waste liquid

Method used

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  • Novel environment-friendly high-molecular sand solidification agent and preparation method thereof
  • Novel environment-friendly high-molecular sand solidification agent and preparation method thereof
  • Novel environment-friendly high-molecular sand solidification agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a novel environment-friendly polymer sand-fixing agent, which comprises the steps of:

[0038] (1) Preparation of polylactic acid: Take 20g of D, L-lactic acid and dilute sulfuric acid containing 1g of pure sulfuric acid into a three-necked flask, and distill under reduced pressure at 100°C for 1 hour to remove excess water. After the distillation is completed, maintain the three-necked flask The temperature in the flask was constant at 160°C, the vacuum degree was -0.06~-0.08Mpa, and the reaction was carried out under nitrogen for 2.5h. After the reaction was completed, the product was poured out from the three-necked flask while it was hot, and the temperature was lowered to room temperature. The crude product was treated with acetone. Dissolve, then precipitate with distilled water, filter, and vacuum-dry the filter cake to obtain polylactic acid;

[0039] (2) Weigh 20g of polyethylene glycol (PEG-2000), 3g of prepared polylactic acid and 5.5g...

Embodiment 2

[0043] A preparation method of a novel environment-friendly polymer sand-fixing agent, which comprises the steps of:

[0044] (1) Preparation of polylactic acid: Weigh 20g of D, L-lactic acid and dilute sulfuric acid containing 1g of pure sulfuric acid into a three-necked flask, and distill under reduced pressure at 100°C for 1h to remove excess water. The temperature in the three-necked flask was constant at 150°C, the vacuum degree was -0.06~-0.08Mpa, and the reaction was carried out under nitrogen gas for 2.5 hours. After the reaction was completed, the product was poured out of the three-necked flask while it was hot, and the temperature was lowered to room temperature. Dissolving, then precipitating with distilled water, filtering, and vacuum-drying the filter cake to obtain polylactic acid;

[0045](2) Weigh 20g of polyethylene glycol (PEG-2000), 3g of prepared polylactic acid and 5.5g of isophorone diisocyanate (PDI) into a three-necked flask with a reflux condenser and...

Embodiment 3

[0049] A preparation method of a novel environment-friendly polymer sand-fixing agent, which comprises the steps of:

[0050] (1) Preparation of polylactic acid: Weigh 20g of D, L-lactic acid and dilute sulfuric acid containing 1g of pure sulfuric acid into a three-necked flask, and distill under reduced pressure at 100°C for 1h to remove excess water. After the distillation is over, control The temperature in the three-necked flask was constant at 160°C, the vacuum degree was -0.06~-0.08Mpa, and the reaction was carried out under nitrogen for 2.5 hours. After the reaction was completed, the product was poured out of the three-necked flask while it was hot, and the temperature was lowered to room temperature. Dissolving, then precipitating with distilled water, filtering, and vacuum-drying the filter cake to obtain polylactic acid;

[0051] (2) Weigh 20g of polyethylene glycol (PEG-2000), 3g of prepared polylactic acid and 5.5g of isophorone diisocyanate (PDI) into a three-nec...

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Abstract

The invention discloses a nvoel environment-friendly high-molecular sand solidification agent. The nvoel environment-friendly high-molecular sand solidification agent is prepared from the following ingredients as raw materials: polylactic acid, polyethylene glycol, isophorone diisocyanate, dimethylolpropionic acid, dibutyltin dilaurate, triethylamine, alkali lignin, glycine and deionized water by using a self-emulsifying method. The preparation method comprises the following concrete steps: (1) preparing the polylactic acid; (2) adding the polyethylene glycol, the polylactic acid and the isophorone diisocyanate into a reaction vessel, then adding the dimethylolpropionic acid and the dibutyltin dilaurate to obtain a polyurethane prepolymer; (3) adding the alkali lignin and the triethylamine to obtain a polyurethane product; and (4) adding the deionized water and the glycine to obtain the high-molecular sand solidification agent. In the sand solidification agent, the low-toxicity isophorone diisocyanate is adopted, the polylactic acid, the alkali lignin and the glycine which have good biodegradability and compatibility are introduced, and based on sand solidification, the sand solidification agent is beneficial to plant growth by degrading step by step to provide nutrients, and the ecological environmental protection benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical sand fixing, and in particular relates to a novel environment-friendly polymer sand fixing agent and a preparation method thereof. Background technique [0002] In recent years, my country's land desertification has become increasingly serious, and a series of hazards have seriously affected people's daily life. At present, methods such as biological sand fixation, mechanical sand fixation, and chemical sand fixation are mainly used for sand prevention and sand fixation. Among them, compared with biological sand fixation and mechanical sand fixation, chemical sand fixation has the advantages of obvious sand fixation effect, convenient application and low cost, and it mainly uses polymer materials to improve land in areas with severe sand damage. However, some polymer materials are difficult to degrade, or degrade to produce toxic substances, which will inevitably cause secondary pollution to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/42C08G18/48C08G18/34C08G18/12C08G18/64C09K17/30C09K105/00
CPCC08G18/12C08G18/348C08G18/4018C08G18/428C08G18/4833C08G18/6492C08G18/755C09K17/30C09K2105/00C08G18/64
Inventor 薛艳郑雷浩李嘉玲钱莎林伟林
Owner SOUTHWEST PETROLEUM UNIV
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