Chlorinated rubber prepared by utilizing recycled tire desulfurized rubber

A technology for recycling tires and devulcanized rubber, applied in the field of chlorinated rubber, to achieve the effects of reducing energy consumption, good economic benefits, and saving waste water treatment costs

Inactive Publication Date: 2016-12-07
程贤甦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chlorinated rubber is prepared from recycled tire desulfurized rubber, etc., and is prepared by the aqueous acid phase chlorination method. The preparation method opens up a new field for the high value-added utilization of waste tire resources, helps to solve the environmental protection problems of the comprehensive utilization of waste tires, and can improve The economic benefit of recycling waste tires reduces the cost of polymer composite materials; the preparation process is environmentally friendly, water-saving, easy to implement, and the modification effect is good

Method used

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  • Chlorinated rubber prepared by utilizing recycled tire desulfurized rubber

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preparation example Construction

[0026] The concrete steps of preparation method are:

[0027] In a 100L titanium alloy stainless steel reaction kettle, add dilute hydrochloric acid with a concentration of 10-15wt%, rubber powder after desulfurization treatment of recycled tires, and stir to make them evenly mixed; The valve for entering liquid chlorine gas is gradually fed into liquid chlorine gas, and the temperature is raised. Before the temperature in the reactor reaches a constant temperature, control the pressure of chlorine gas at 0.35-0.50 MPa, add 40-60% of the formula amount of chlorine gas, and feed the remaining chlorine gas in the constant temperature reaction stage. , the constant temperature reaction stage controls the chlorine pressure at 0.65-0.85 MPa; the constant temperature is any point temperature of 100-130°C; the continuation of the reaction time after reaching the constant temperature reaction stage is 0.5-1.5h; the reaction is carried out under stirring; After the tail gas treatment d...

Embodiment 1

[0032] In a 100L titanium alloy stainless steel reaction kettle, add 50L of dilute hydrochloric acid with a concentration of 13wt%, 12Kg of rubber powder after tire desulfurization treatment, and stir to make them evenly mixed; methyl ammonium chloride 0.08Kg, initiator BPO (dibenzoyl peroxide) 0.015Kg, stir and heat for 0.5h, when the temperature reaches 80°C, start to introduce 0.40 MPa of chlorine gas, control the amount of chlorine gas and gradually Raise the temperature to 115°C and maintain a constant temperature. The amount of chlorine in the early stage is 2.4Kg, the amount of chlorine in the constant temperature stage is 3.5Kg, the pressure of chlorine gas in the constant temperature stage is 0.70 MPa, and the time for chlorine gas in the constant temperature stage is 0.5 h; Keep the temperature and continue to react for 0.8h, and the reaction is over; after using the tail gas treatment device to absorb the chlorine gas in the reactor, the product is deacidified by cen...

Embodiment 2

[0034] In the 100L titanium alloy stainless steel reaction kettle, add 55L of dilute hydrochloric acid with a concentration of 11wt%, 14Kg of rubber powder after tire desulfurization treatment, and stir to make it evenly mixed; add lignin derivative dispersant 0.085Kg, emulsifier 16 Alkyltrimethylammonium chloride 0.08Kg, initiator di-tert-butyl peroxide DTBP 0.015Kg, stir and heat for 0.5h, when the temperature reaches 85°C, start to feed 0.45 MPa of chlorine gas, control the amount of chlorine gas and Gradually raise the temperature to 115°C and maintain a constant temperature. The amount of chlorine in the early stage is 3.0Kg, the amount of chlorine in the constant temperature stage is 3.9Kg, the pressure of chlorine gas in the constant temperature stage is 0.75 MPa, and the time for chlorine gas in the constant temperature stage is 0.5 h; , keep the temperature and continue to react for 1.0 h, and the reaction ends; after the chlorine gas in the reactor is absorbed by the ...

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Abstract

The invention discloses chlorinated rubber prepared by utilizing recycled tire desulfurized rubber. The chlorinated rubber comprises the following raw materials in parts by weight: 40 to 60 parts of a hydrochloric acid solution with a concentration of 10 to 15wt%, 8.0 to 15.0 parts of the recycled tire desulfuized rubber, 3.0 to 9.0 parts of chlorine, 0.07 to 0.25 part of a dispersant, 0.07 to 0.15 part of an emulsifier and 0.01 to 0.03 part of an initiator. The preparation method comprises the following steps: mixing raw materials, directly introducing liquid chlorine, and carrying out a reaction under heating and pressurizing. The chlorinated rubber prepared by using the method provided by the invention adopts the pollution-free recycled tire rubber obtained by utilizing a novel desulfurization technology as a raw material, and an aqueous acid-phase chlorination method is adopted to prepare the chlorinated rubber and an industrial product--hydrogen chloride contained hydrochloric acid with a concentration of 23 to 26wt%; and the method overcomes the problems of large water consumption and high treatment cost of generated acid-contained wastewater in an aqueous phase method, opens up a novel approach for high-value-added utilization of the recycled tire rubber, and has low cost.

Description

technical field [0001] The invention belongs to the field of polymer materials and their modification, and more specifically relates to a chlorinated rubber prepared by recycling tire desulfurized rubber. Background technique [0002] Chlorinated rubber (CR) is a chlorinated high polymer obtained by modifying natural rubber or synthetic rubber by chlorination. Because of its excellent film-forming properties, adhesion, corrosion resistance, flame retardancy and insulation properties, it can be widely used in the manufacture of ink additives, coatings and adhesives, etc. It is a promising chlorine-containing fine chemical product one. [0003] The research on chlorinated rubber first started in 1895, and in 1917, the current British ICI company first realized industrial production. After more than 100 years of development and research on chlorinated rubber, a complete production and application system has been established. Many companies produce and sell chlorinated rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/14
CPCC08C19/14
Inventor 程贤甦
Owner 程贤甦
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