Lock color method for phenols products

A product and color stabilization technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as color stabilization methods that have not yet been found, and achieve continuous and stable appearance and color, commercial value expansion, environmental protection and rational utilization The effect of resources

Inactive Publication Date: 2011-07-20
HARBIN YILAN ZHONGTAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because in actual production and application, the above-mentioned conditions are particularly difficult to meet, therefore, there is no specific report on the color stabilization method suitable for this source of phenolic products.

Method used

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  • Lock color method for phenols products
  • Lock color method for phenols products
  • Lock color method for phenols products

Examples

Experimental program
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Embodiment Construction

[0015] The following examples describe the present invention in more detail:

[0016] (1) Extraction process

[0017] The crude phenol is vacuum sucked into the heating kettle of the rectification system for distillation, and the fractions of cresol, m-p-cresol and xylenol are cut. Pour the distillate into the extraction tank and add the extraction agent 85% industrial phosphoric acid. The phenol fraction and the extraction agent are mixed according to the ratio of 6.5-26.5:1 (W / W). 1.5 hours, stand still for 2-4 hours, when the phase interface in the extraction kettle is stable, the upper layer is the phenol fraction, the lower layer is the extractant, and the extractant residue is discharged, and the extracted cresol and m-p-cresol are left in the extraction kettle , Xylenol fraction.

[0018] (2) Adsorption process

[0019] Heat the extracted cresol, m-p-cresol and xylenol fractions to 105-130°C and pour them into the adsorption kettle, then add the adsorbent industrial ...

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Abstract

The invention discloses a color stabilizing method for phenol products, including the following two steps: the first step, the extraction technique is adopted for removing compounds containing nitrogen, and the like; the second step, the adsorption technique is adopted for further removing the residual impurities such as gelatine, and the like; the beneficial effect thereof is that cresol, meta-paracresol and dimethyl phenol are completely purified by the technologies of extraction, complexation, adsorption, and the like, to completely eliminate inducing factors of color change of the products, therefore the appearance and color can keep stable continuously; owing to the optimization of the appearance of cresol, meta-paracresol and dimethyl phenol, the market space, application range and commercial value are all dramatically expanded and enhanced, the technology can take stopgap and radical measures, the stabilizing effect of the appearance can not be affected by other factors such asdioxygen, photon, and the like, and the residual volume of finishing agent is nearly zero, so that the own property and application of cresol, meta-paracresol and dimethyl phenol are not affected.

Description

technical field [0001] The invention relates to a method for stabilizing the color of phenolic products. The phenolic products are mainly industrial products such as cresol, m-p-cresol and xylenol. The cresol, m-p-cresol and xylenol described here are Phenol and the like refer to products obtained from coal vaporization or coal coking and direct coal liquefaction. Background technique [0002] Phenol products, especially cresol, m-p-cresol, and xylenol are important raw materials in chemical production, and are widely used in many fine chemical fields such as the preparation of insulating materials, fungicides, spices, dyes, and pesticides. Because cresol, m-p-cresol, and xylenol are sensitive to oxygen, highly reactive, and unstable in nature, they will easily change color due to oxidation when exposed to light or air during storage and transportation. The prolongation of the storage time will cause the discoloration to become more and more serious, which directly causes t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/72C07C37/68C07C39/02
Inventor 赵世荣
Owner HARBIN YILAN ZHONGTAI CHEM
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