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Method for preparing ultra high-purity alcohol compound

A compound and alcohol technology, applied in the field of alcohol compound purification, can solve the problems of decreased resin exchange effect, unfavorable influence on production efficiency, etc., and achieve the effects of low price, convenient preparation, simple and easy equipment combination and operation process

Active Publication Date: 2006-10-11
FOSHAN XILONG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, using absolute ethanol with a water content of 0.05% to treat the undried gel-type anion-cation exchange resin with a moisture content of 5%, the gel-type anion-cation exchange resin that has been dried at 80°C for 2 hours is treated The moisture content of the final product reaches 2%, and the product treated with the gel-type anion exchange resin after drying at 100°C for 2 hours still has 0.5% moisture, and as the resin dries, the exchange effect of the resin will decline rapidly , adversely affect production efficiency

Method used

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  • Method for preparing ultra high-purity alcohol compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add 200 grams of activated carbon for surface oxidation into an adsorption column with a diameter of 50 mm and a length of about 600 mm. At room temperature (about 24 ° C), slowly add 5000 mL of distilled industrial methanol with a content of 99.9%. When the liquid starts to flow out, collect the effluent , Control the outflow rate to be 5ml / min / 100g activated carbon. When the collection is complete, recirculate the adsorption once, and finally collect 4855mL of purified liquid, with a single treatment yield of 97.10%. The results of index analysis before and after treatment are as follows:

[0030] Chemical indicators

Embodiment 2

[0032] Chemical indicators

Embodiment 3

[0034] Chemical indicators

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Abstract

The invention discloses a method using adsorption to remove microscale metallic cation and non-metallic anion in alcohol compound, adopting surface oxidation active carbon that is disposed by oxidant as adsorbent, getting ultra-pure alcohol compound after contact adsorpting alcohol compound and surface oxidation active carbon, the mentioned alcohol compound is liquefied alcohol compound in common temperature and pressure. This method is easy to operate, convenience, safe and clean to prepare, compared with resinous exchange method, the treatment effect is homologous to resinous exchange method, the purity velocity and efficiency are higher than resinous exchange method, the dried surface oxidation active carbon would not bring new moisture for alcohol compound.

Description

technical field [0001] The invention relates to a method for purifying alcoholic compounds, in particular to a method for removing trace metal cations and non-metallic anions in alcoholic compounds by an adsorption method. Background technique [0002] High-purity alcohol compounds are miscible with water, have a low boiling point, and are volatile. They are cleaning agents used on a large scale in the production process of integrated circuits, wafers, printed circuit boards, and precision components. High-purity alcohol compounds mainly include low-carbon chain alcohols such as methanol, ethanol, and isopropanol. The global annual demand is hundreds of thousands of tons, and the domestic market also has a scale of tens of thousands of tons. [0003] At present, the commonly used purification techniques for preparing ultra-clean and high-purity reagents at home and abroad mainly include rectification, distillation, sub-boiling distillation, isothermal distillation, vacuum di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/76B01J20/20C07C31/02C07C31/18
Inventor 黄伟鹏庄景发刘志平赵书煌谢泽雄袁爱国肖克强
Owner FOSHAN XILONG CHEM CO LTD