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High efficiency water reducing agent produced from waste polystyrene plastics, and production method thereof

A technology of waste polystyrene and high-efficiency water-reducing agent, which is applied in the direction of plastic recycling and recycling technology, can solve the problems of difficult recovery of organic solvents, large dosage of sulfonating agent, and high recovery cost, and reduce the multiple of sulfonating agent. , high activity, the effect of avoiding secondary pollution

Inactive Publication Date: 2015-05-06
山东汶河新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 200510018096.5 uses waste polystyrene to prepare polystyrene sulfonate. The patent mentions sulfuric acid sulfonation in organic solvents. There are still many problems in the actual production process: cohesion is prone to occur during the sulfonation process, and the amount of sulfonation used Big, organic solvents are not easy to recycle or the recycling cost is high
Patent 95103865.6 is used as a catalyst for the catalytic degradation of waste polystyrene plastic to styrene, but has not been applied to the technical field of water reducing agent production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Melt 500g of waste polystyrene plastic in a metal container, add 2g of calcium oxide, heat up to 230°C, and react for 5 hours to obtain the degraded material, then cool and crush it to 100 mesh for later use. The tail gas of reaction is condensed and collected 50 grams by condenser.

[0028] (2) Add 200 grams of the material degraded in (1) above and 20 grams of condensed liquid into a 1000ml flask, add 296 grams of 20% oleum, raise the temperature to 180°C, and react for 4 to 6 hours. Take a small amount When the liquid is completely dissolved in cold water, the reaction is terminated, the temperature is lowered to 50°C, and 100 grams of water is added.

[0029] (3) Add 171 grams of formaldehyde (37%) dropwise to the material obtained in (2) at a temperature of 95-105°C, and condense for 8 hours at a temperature of 100-110°C.

[0030] (4) Neutralize the reaction material of (3) with sodium hydroxide to Ph=7-9 to obtain polystyrene superplasticizer.

[0031] The i...

Embodiment 2

[0033] (1) Melt 500g of waste polystyrene plastic in a metal container, add 2g of sodium oxide, heat up to 260°C, and react for 5 hours to obtain the degraded material, then cool and crush it to 100 mesh for later use. The tail gas of reaction is condensed and collected 50 grams by condenser.

[0034] (2) Add 200 grams of the degraded material of the above (1) and 20 grams of condensed liquid into a 1000ml flask, add 200 grams of 65% oleum, raise the temperature to 150°C, and react for 4 to 6 hours. Take a small amount When the liquid is completely dissolved in cold water, the reaction is terminated, the temperature is lowered to 50°C, and 100 grams of water is added.

[0035] (3) Add 200 g of formaldehyde (37%) dropwise to the material obtained in (2) at a temperature of 95-105°C, and condense for 8 hours at a temperature of 100-110°C.

[0036] (4) Neutralize the reaction material of (3) with sodium hydroxide to Ph=7-9 to obtain polystyrene superplasticizer.

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Abstract

The invention relates to the technical field of a high efficiency water reducing agent, and specifically relates to a high efficiency water reducing agent produced from waste polystyrene plastics and a production method thereof. The polystyrene high efficiency water reducing agent is obtained by the steps of heating the waste polystyrene plastics to be melted, adding a catalyst, degrading at a high temperature, adding the degraded material and a condensate liquid together into a reactor, adding sulfuric acid for sulfonation, adding formaldehyde for condensation, and neutralizing to a pH value of 7-9 with a base. The polystyrene high efficiency water reducing agent has the following advantages that 1). molecular weight of the polystyrene is reduced to a proper size via the high temperature degradation; the water reducing agent has high surface activity after sulfonation; and compared with a water reducing agent obtained by a solvent method, the water reducing agent prepared by the method has high water-reducing rate and high activity; 2) high temperature degradation products of the polystyrene are fully recycled to participate in sulfonation reaction, without bringing secondary pollutions; and 3) no solvent is used in the sulfonation step, usage amount of the sulfonating agent is reduced, by-product in a product is decreased, effective content is improved; and compared with the solvent method, the secondary pollutions brought by the solvent is prevented.

Description

technical field [0001] The invention relates to the technical field of high-efficiency water-reducer production, in particular to a high-efficiency water-reducer produced by using waste high-molecular polystyrene plastic waste and a production method thereof. Background technique [0002] Plastic products have brought great convenience to people's production and life, but the waste plastic products, especially polystyrene plastics, are flooding and polluting our living environment is shocking. As a packaging material and fast food, the annual output of polystyrene plastic is huge, but after being discarded, it is difficult to crack and degrade at room temperature. Recycling, modifying and utilizing this discarded polystyrene plastic can not only turn waste into wealth, but also avoid environmental pollution. [0003] By searching for patents, some people have done some work in this area in the literature on the use of waste polystyrene plastics in the production of water re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F8/36C08J11/12C04B24/20C04B103/30
CPCY02W30/62
Inventor 亓建设吴振华杨翠萍李宏石吴修萍孙燕杰
Owner 山东汶河新材料有限公司
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