Lignin-based strong-acid ion exchange resin and preparation method thereof

An ion exchange resin and lignin-based technology, applied in the field of lignin-based strongly acidic ion exchange resin and its preparation, can solve problems such as waste of renewable resources, environmental pollution, etc., and achieve lower production costs, low raw materials, and novel synthesis mechanism. Effect

Inactive Publication Date: 2013-09-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The global pulp and paper industry extracts up to 50 million tons of lignin by-products. Except for about 2% of which are effectively used commercially, most of the lignin is directly burned as a low-value fuel, resulting in serious environmental pollution and this destructive Significant waste of renewable resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of the lignin-based strongly acidic ion-exchange resin comprises the following steps and process conditions: take 10g of sodium lignosulfonate and place it in a tubular reaction furnace, and heat up the reaction furnace to 150°C under the protection of nitrogen. Carbonize at constant temperature for 5 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is 4.4mmol / g, and the ion ex...

Embodiment 2

[0017] The preparation method of the lignin-based strongly acidic ion exchange resin comprises the following steps and process conditions: taking 15g of sodium lignosulfonate and placing it in a tubular reaction furnace, and heating the reaction furnace to 200°C under the protection of nitrogen. Carbonize at constant temperature for 10 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is 4.7mmol / g, and the i...

Embodiment 3

[0019] The preparation method of the lignin-based strongly acidic ion exchange resin comprises the following steps and process conditions: 5g of calcium lignosulfonate is weighed and placed in a tubular reaction furnace, and the temperature of the reaction furnace is raised to 210°C under the protection of nitrogen. Carbonize at constant temperature for 20 hours to obtain a dark brown solid product, which is ground into powder after cooling, then add a hydrochloric acid solution with a concentration of 6mol / L, undergo ion exchange for many times, and then wash the carbonized sample with a large amount of deionized water for many times until the filtrate Add silver nitrate solution until no precipitate is formed. The cleaned carbonized sample is vacuum filtered to separate the dark brown powder product into a mortar, and dried in a constant temperature blast drying oven at 100°C to obtain a lignin-based strongly acidic ion exchange resin with a cation exchange capacity of It is...

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Abstract

The invention provides lignin-based group strong-acid ion exchange resin and a preparation method thereof. The preparation method comprises the following steps of: adding right amount of lignosulphonate in a tube-type reaction furnace, then, slowly raising the temperature to reach the preset temperature according to a certain temperature rising programming, carrying out polycondensation reaction on the lignosulphonate for a certain time, and sequentially carrying out ion exchange, separation and washing on the lignosulphonate, so as to obtain a lignin-based strong-acid ion exchange resin material. The resin provided by the invention has the advantages that a source of a raw material is wide, the property is good (the total ion exchange capacity is greater than 4.4mmol / g), the preparation process is simple and the like.

Description

technical field [0001] The invention relates to the field of functional polymers, in particular to a lignin-based strongly acidic ion exchange resin and a preparation method thereof. Background technique [0002] Ion exchange resin, as a kind of cross-linked polymer loaded with active groups, has been widely used in many fields such as electric power, food, medicine and health, chemical industry, metallurgy and environmental protection because of its functions of exchange, selection, absorption and catalysis. field. However, with the depletion of oil and natural gas resources, the raw materials for the preparation of ion exchange resin matrix (mainly olefin monomers such as styrene and acrylic acid) will also face a shortage. Therefore, it is imperative to actively develop biomass resources and use natural polymer materials to prepare new ion exchange resins. [0003] As one of the most abundant renewable resources on earth, lignin exists widely in plants in nature, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/22
Inventor 陈标华梁凤兵黄崇品宋彦磊李英霞
Owner BEIJING UNIV OF CHEM TECH
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