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Reutilizing method for phenol coke tar waste slag

A technology of tar waste residue and phenol tar, which is applied in the field of phenol tar waste residue as an unsaturated compound monomer polymerization inhibitor, can solve the problems of unsuitable tar waste residue, energy waste, and toxic gas pollution, and achieve low cost and polymerization inhibition effect Good, low equipment investment effect

Active Publication Date: 2008-08-13
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to incomplete statistics, the annual by-production of such tar waste residues in Jiangsu, Zhejiang, Shandong and other places reaches about 5,000 tons. Now this type of residues are all processed by incineration. waste, and the combustion process will produce a large amount of toxic gas and pollute the environment
However, this method needs to consume a large amount of reagents such as acid and alkali, and will generate a large amount of waste water, and this method is not suitable for the tar waste residue produced by the phenol hydroxylation process

Method used

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  • Reutilizing method for phenol coke tar waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0015] Under the conditions of no air and a temperature of 120°C, acrylic acid with a purity of 99.8% after rectification is used as a raw material. The tar waste residue powder was used as a polymerization inhibitor alone, and the polymerization inhibition experiment was carried out in a 50ml pear-shaped bottle by heating with silicone oil. The results are shown in Table 1.

[0016] Table 1 tar powder alone is the experimental result of polymerization inhibitor

[0017] Example

Amount added / ppm

temperature / ℃

Induction period / h

1

100

120

84

2

200

120

230

3

300

120

378

4

400

120

646

[0018] The hydroquinone of the same addition amount of table 2 is used as polymerization inhibitor experimental result

[0019] comparative example

Embodiment 5-9

[0023] Experimental condition is the same as embodiment 1. The tar waste residue powder was compounded with one of the copper salt compounds, nitrogen oxide free radical compounds, phenols and amine compounds, and the polymerization inhibition experiment was carried out in a 50ml pear-shaped bottle heated with silicone oil. The experimental results are shown in Table 3.

[0024] Table 3 Binary composite polymerization inhibitor experimental results

[0025] Example

Embodiment 10-13

[0033] Experimental condition is the same as embodiment 1. The tar waste residue powder was compounded with two kinds of copper salt compounds, nitrogen oxide free radical compounds, phenols and amine compounds, and the polymerization inhibition experiment was carried out in a 50ml pear-shaped bottle by heating with silicone oil. The experimental results are shown in Table 5.

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Abstract

The invention relates to a method for using phenol tar obtained from the process of producing o-dihydroxybenzene / p-dihydroxybenzene by phenol hydroxylation as an inhibitor of unsaturated compound monomer, specifically, adopting tar dregs signally or mixing it with one or several of copper salt compounds, nitroxy free radical compounds, phenol and amine compounds as the inhibitor of unsaturated compound monomer, wherein the adding amount of the inhibitor is 50 to 5000ppm to the unsaturated compound unit by mass. With reuse of tar dregs, dregs in dihydroxybenzene production is processed, saving energy and reducing environmental pollution. In addition, compared with other inhibitor systems adopted in various unsaturated compound monomers in industry, the invention has better inhibition effect and lower cost.

Description

technical field [0001] The present invention relates to the utilization method of the tar waste residue produced in the process of preparing ortho / hydroquinone by hydroxylation of phenol, specifically the by-product phenol tar waste residue in the process of preparing ortho / hydroquinone by hydroxylation of phenol and hydrogen peroxide As a method of unsaturated compound monomer polymerization inhibitor. Background technique [0002] Catechol and hydroquinone are two important chemical products with a wide range of applications. Catechol, also known as catechol, is a basic organic raw material or intermediate in industries such as pesticides, medicines, spices, rubber, dyes, and photosensitive materials. Hydroquinone, also known as hydroquinone, is mainly used in the synthesis of photosensitive materials, fertilizer additives, anthraquinone dyes and azo dyes, as well as polymerization inhibitors, antioxidants, and rubber additives for synthetic material processing. [0003]...

Claims

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Application Information

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IPC IPC(8): C09K15/08C07B63/04
Inventor 崔曜许宁唐勇张春雷马建学
Owner SHANGHAI HUAYI NEW MATERIAL
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