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Resource utilization method for waste liquid crystal display polaroid

A technology of polarizer and resource utilization, applied in chemical instruments and methods, organic chemistry, liquid carbon-containing fuels, etc., can solve problems such as residual residue, complex process, incomplete degradation of polarizer, etc., to solve environmental problems and improve The effect of economic benefits

Active Publication Date: 2015-11-04
人民百业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the yield of acetic acid or lactic acid prepared by this method is low, and the degradation of the polarizer is incomplete, leaving residues; on the other hand, the process is complicated, and it is currently limited to the laboratory research stage and has not been widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Load 100g of the crushed and washed polarizer into the reactor, pass in steam heated to 100°C, heat the reactor to 100°C, and react for 50 hours. The reaction was stopped, and the solid remaining in the reactor was dried and weighed, weighing 85.4 g, and the decomposition rate was 14.6%. The undecomposed polarizer can participate in the lysis process of the next batch. The formed decomposition mixture is cooled down by a cooling device, and acetic acid, ethanol, glucose and fuel oil are obtained after separation and purification.

Embodiment 2

[0019] Load 100 g of the crushed and washed polarizer into the reactor, pass in ethanol vapor heated to 200°C, heat the reactor to 200°C, and react for 20 hours. The reaction was stopped, and the solid remaining in the reactor was dried and weighed to weigh 34.7 g and the decomposition rate was 65.3%. The undecomposed polarizer can participate in the lysis process of the next batch. The formed decomposition mixture is cooled down by a cooling device, and acetic acid, ethanol, glucose and fuel oil are obtained after separation and purification.

Embodiment 3

[0021] Load 100 g of the crushed and washed polarizer into the reactor, pass in propylene glycol steam heated to 500°C, heat the reactor to 800°C, and react for 1 hour. The reaction was stopped, and the solid remaining in the reactor was dried and weighed to weigh 9.8 g and the decomposition rate was 90.2%. The undecomposed polarizer can participate in the lysis process of the next batch. The formed decomposition mixture is cooled down by a cooling device, and acetic acid, ethanol, glucose and fuel oil are obtained after separation and purification.

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PUM

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Abstract

The invention relates to a resource utilization method for a waste liquid crystal display polaroid. The resource utilization method comprises the following steps: crushing, cleaning and drying the polaroid for later use; putting the crushed polaroid into a reactor, introducing high-temperature steam at a steam inlet end of the reactor to react with the crushed polaroid, and cooling a formed decomposition mixture by a cooling device; and collecting cooled liquid, and separating and purifying the collected cooled liquid by a separating and purifying technology, thereby obtaining acetic acid, alcohol, glucose and an oil phase. The resource utilization method has the beneficial effects that: firstly, the acetic acid, the alcohol, the glucose and the oil phase, which are obtained by separating and purifying split products, can be reused in basic chemical products; secondly, if all of the split products are the oil phase or the oil phase part obtained by separating, the split products can be directly used as fuel oil; thirdly, cost for further purifying is avoided because of direct application of the oil phase part, so that the economical benefits are obviously improved; and fourthly, not only is the environmental problem solved, but also certain economical benefits are achieved.

Description

Technical field [0001] The invention relates to a resource utilization method of a waste liquid crystal screen polarizer. Background technique [0002] The rapid development of the liquid crystal display, plasma display, and electroluminescence display industries has led to a sharp increase in the global output of LCD screens every year. Scraped LCD screens produced in the process of producing LCD screens and a large number of discarded LCD displays that have ended their functions have gradually become the main sources of electronic waste. Because these discarded LCD screens are not effectively recycled and utilized, most of them become pollutants that flood the urban garbage dump, destroying the environment and wasting resources. Polarizer is an important functional film material in liquid crystal screens, mainly composed of cellulose triacetate and polyvinyl alcohol grafted with iodine. This film is pasted on the glass substrates before and after the liquid crystal screen thr...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07H1/00C07C31/08C07C29/00C07C53/08C07C51/00C10L1/02
Inventor 唐惠东李龙珠杨蓉陈玉伟徐立波
Owner 人民百业科技有限公司