Method for preparing multi-functional rubber additives by recycling alkali reduction processing drainage liquid

A rubber additive and multi-functional technology, which is applied in the field of preparation of multi-functional rubber additives, can solve the problems of low product purity and restrictions on industrial application, so as to increase the plasticizing speed, improve the anti-vulcanization reversion performance, and realize resource recovery. The effect of recycling

Active Publication Date: 2016-09-28
江苏爱特恩高分子材料有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The terephthalic acid recovered by the prior art is basically used as a chemical raw material for synthesizing polyester or preparing terephthalic acid esters. Since the recovered product is not high in purity, only low-grade terephthalic acid can be prepared. salt, which limits its industrial application

Method used

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  • Method for preparing multi-functional rubber additives by recycling alkali reduction processing drainage liquid

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Experimental program
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Effect test

Embodiment 1

[0015] Alkali decrement drainage passes through the advection type sedimentation tank and activated carbon filter in turn, and then enters the acid analysis tank. Under stirring at 80 rpm, sulfuric acid is added. When the pH of the water quality drops to 4, continue to stir and age for 2 hours, and finally Filtration yielded crude terephthalic acid. In the reaction kettle, add 60 parts of terephthalic acid, 40 parts of stearic acid, 160 parts of water, and 60 parts of sodium hydroxide, stir, and after the terephthalic acid and stearic acid are completely dissolved, add zinc chloride solution 60 parts, stir while adding zinc chloride, the stirring speed is 60 rev / min, add in 20 minutes, continue to stir for 40 minutes after adding zinc chloride, centrifuge, filter cake is washed and dried, that is multi-functional Finished rubber additives.

[0016] The rubber formula used is: NR 100, stearic acid 2, N220 45, silica 8, Si69 0.8, aromatic oil 5, protective wax 2, 4010NA 1.5, su...

Embodiment 2

[0018] Alkali decrement drains pass through the advection sedimentation tank and activated carbon filter in sequence, and then enter the acid analysis tank. Under stirring at 80 rpm, add sulfuric acid. When the pH of the water drops to 4, continue to stir and age for 3 hours, and finally Filtration yielded crude terephthalic acid. In the reaction kettle, add 60 parts of terephthalic acid, 40 parts of stearic acid, 120 parts of water, and 10 parts of sodium hydroxide, stir, and after the terephthalic acid and stearic acid are completely dissolved, add zinc chloride solution 60 parts, stir while adding zinc chloride, the stirring speed is 100 rpm, and finish adding in 30 minutes. After adding zinc chloride, continue stirring for 30 minutes, centrifuge, filter cake is washed and dried, that is, multi-functional Finished rubber additives.

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Abstract

The invention discloses a method for preparing a multifunctional rubber assistant by recycling alkali-weight-reduction processing discharged liquor. The method comprises the following steps: sequentially passing alkali-weight-reduction wastewater through a laminar-flow precipitation tank and an activated carbon filter to enter an acid precipitation tank, adding sulfuric acid or hydrochloric acid while stirring, and precipitating terephthalic acid when the wastewater becomes acidic; and adding the terephthalic acid and stearic acid into a reaction kettle, adding water and sodium hydroxide to dissolve the terephthalic acid and stearic acid into a sodium solution, adding a zinc chloride solution to crystallize and precipitate a zinc terephthalate-zinc stearate crystal mixture, centrifuging, filtering, washing and drying to obtain the multifunctional rubber assistant finished product. By using the alkali-weight-reduction processing wastewater as the raw material, the method reduces the wastewater discharge and implements resource reutilization on the premise of preparing the novel rubber assistant, and thus, has obvious economic benefit and social benefit.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, and more specifically, relates to a preparation method of a multifunctional rubber additive. A new type of rubber additive integrating plasticizing, dispersing, anti-reversion and other functions can be obtained by means of the manufacturing method described above. 【technical background】 [0002] Rubber additives mainly include processing aids, accelerators, anti-aging agents, reinforcing agents, etc., and processing aids include plasticizers, dispersants, softeners, and tackifiers. Traditional rubber additives generally have a single function, and rubber formulations are a combination of these additives. In recent years, rubber additives have developed towards high efficiency and multifunctionality, which can reduce the number of complex components in the formula and simplify the formula. [0003] Natural rubber (NR) is the first choice for elastomers used in heavy-duty applications such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08K13/02C08K5/092C08K5/09C08K3/22
CPCC08L7/00C08L2205/03C08L91/00C08L91/06C08K13/02C08K5/092C08K5/09C08K2003/2296
Inventor 张莉娜
Owner 江苏爱特恩高分子材料有限公司
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