Focused on the research and development and production of resin materials and resin end products - Hebei Lijiang
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AboutHebei Lijiang Biotechnology Co., Ltd. is a new material manufacturer specializing in the production of functional special ion exchange resins and disposable blood perfusion devices. It is a modern high-tech enterprise integrating the research and development, production, sales, and service of resin materials and resin end products. The company was established in April 2014 with a registered capital of 52 million yuan. It plans to cover an area of 267 acres and is located in the High-tech Industrial Park of Weixian County, Hebei Province—New Material Demonstration Park. The total investment is 510 million yuan. It is a council member unit of the Ion Exchange Resin Branch of the China Membrane Industry Association.
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BlogsThe company will focus on the high-end market, with the purpose of serving society, solidly carrying out technological innovation and product promotion, continuously improving the development and expansion of ion exchange resin products in emerging application fields, thereby promoting the upgrading and development of related industries.
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Company AlbumThe current phase of construction has been fully completed and put into operation, featuring a comprehensive workshop with 42 production lines for functional ion exchange resins with an annual output of 16,800 tons and a production capacity of 30,000 tons, a wastewater treatment plant with an annual treatment capacity of 403,000 tons, and a workshop producing 5,000 tons of medical-grade magnesium sulfate annually. Trial production began in July 2016, with official production starting in January 2017.
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Cation and Anion Exchange Resin Pretreatment
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Ion exchange resins often contain solvents, unreacted substances from the polymerization process, and small amounts of oligomers. They may also adsorb metal ions such as iron, copper, and aluminum. When the resin comes into contact with acid or other solutions, these soluble impurities can leach into the solution, causing water quality contamination during initial use. Therefore, new resins must be pretreated in the ion exchange equipment before use.
1. Pretreatment steps for cation resin:
First, use saturated brine solution, approximately three times the volume of the resin to be treated. Soak the resin in the brine solution for 18-20 hours, then drain the brine and rinse with clean water until the effluent is free of yellow color. Next, soak the resin in 2%-4% NaOH solution, in the same volume as before, for 2-4 hours (or perform a small volume wash). After draining the alkali solution, rinse the resin until the effluent is nearly neutral.
Finally, soak the resin in 5% HCl solution, using the same volume as before, for 4-8 hours. Drain the acid solution and rinse with clean water until neutral.
2. Pretreatment of anion resin:
The first step in its treatment is the same as the first step for cation resin pretreatment. Then soak in 5% HCl for 4-8 hours, drain the acid, and rinse with water until neutral. Finally, soak in 2%-4% NaOH solution for 4-8 hours, drain the alkali, and rinse with clean water until neutral.
Cation and Anion Exchange Resin Pretreatment
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