Impurity removal method of synthetic rubber crude monomer

A technology for synthesizing rubber and monomers, used in chemical instruments and methods, purification/separation of hydrocarbons and hydrocarbons, etc. It can solve the problems of high energy consumption and material consumption, and achieve continuous and stable production, stable operation, and simple operation.

Active Publication Date: 2021-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a synthetic rubber coarse monomer in order to overcome the problems of higher energy consumption and material consumption in the existing synthetic rubber monomer impurity removal process The impurity removal method has simple operation steps and has the characteristics of energy saving, emission reduction, environmental protection and convenience

Method used

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  • Impurity removal method of synthetic rubber crude monomer
  • Impurity removal method of synthetic rubber crude monomer
  • Impurity removal method of synthetic rubber crude monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] With the cut organic solvent resistant nanofiltration membrane (this organic solvent resistant nanofiltration membrane is purchased from Evonik Specialty Chemicals, the molecular weight cut-off is 280Da, the product brand is PM280, and the effective area of ​​the membrane is 0.0014m 2 ) into the membrane separation module, connect the membrane separation device, add 500mL of isoprene to the mother liquor tank of the membrane separation device, turn on the power pump, fill the mother liquor tank with high-purity nitrogen, keep the pressure at 2MPa, and wash the membrane After 2h, empty the feed liquid.

[0047] At 25°C, add 550ml of isoprene and 0.008g of p-tert-butylcatechol (TBC) to the above-mentioned membrane separation device, stir for 0.1h, then add 0.04g of water, and stir for 0.1h to form a raw material solution , and then turn on the system, keep the pressure at 2MPa, control the temperature of the mother liquid tank at 25°C with a water bath, start the membrane...

Embodiment 2

[0050] The cut organic solvent resistant nanofiltration membrane (this organic solvent resistant nanofiltration membrane is a P84 polyimide membrane with a molecular weight cut-off of 250Da prepared according to the method disclosed in CN101678286A in Example 7, the membrane area 0.0014m 2 ) into the membrane separation module, connect the membrane separation device, add 500mL of isoprene to the mother liquor tank of the membrane separation device, turn on the power pump, fill the mother liquor tank with high-purity nitrogen, keep the pressure at 2.5MPa, wash After 2 hours of filming, the feed liquid was emptied.

[0051] At 25°C, add 550ml of isoprene to the above-mentioned membrane separation device, add 0.018g of polymerization inhibitor p-tert-butylcatechol, stir for 0.5h, then add 0.09g of water, stir for 0.5h, and form a raw material solution , and then turn on the system, keep the pressure at 2.5MPa, control the temperature of the mother liquid tank at 45°C with a wate...

Embodiment 3

[0054] The cut organic solvent resistant nanofiltration membrane (this organic solvent resistant nanofiltration membrane is a P84 polyimide membrane with a molecular weight cut-off of 330Da prepared according to the method disclosed in CN101678286A in Example 7, the membrane area 0.0014m 2 ) into the membrane separation module, connect the membrane separation device, add 500mL of isoprene to the mother liquor tank of the membrane separation device, turn on the power pump, fill the mother liquor tank with high-purity nitrogen, keep the pressure at 2.5MPa, wash After 2 hours of filming, the feed liquid was emptied.

[0055] At 25°C, add 550ml of isoprene and 0.038g of p-tert-butylcatechol to the above-mentioned membrane separation device, stir for 0.3h, then add 0.06g of water, stir for 0.3h to form a raw material solution, and then turn it on System, the pressure is maintained at 2MPa, the temperature of the mother liquid tank is controlled by a water bath to 40°C, and the mem...

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Abstract

The invention relates to the field of synthetic rubber, and discloses an impurity removal method of a synthetic rubber crude monomer, which comprises the step of making the synthetic rubber crude monomer with a nanofiltration membrane, wherein the nanofiltration membrane is an asymmetric nanofiltration membrane prepared from P84 polyimide, the molecular weight cutoff of the nanofiltration membraneis 100-400Da, and the contact pressure is 1-6MPa. The synthetic rubber crude monomer contains water and polar organic impurities, based on the total weight of the synthetic rubber crude monomer, thecontent of the water is 1000 ppm or less, and the content of the polar organic impurities is 1000 ppm or less. The method has the characteristics of energy conservation, emission reduction, environmental protection, convenience and high impurity removal rate.

Description

technical field [0001] The invention relates to the technical field of synthetic rubber, in particular to a method for removing impurities from synthetic rubber crude monomers. Background technique [0002] Synthetic rubber is a highly elastic polymer that is artificially synthesized. Also known as synthetic elastomer, it is one of the three major synthetic materials, has broad research prospects, and is an important strategic material. Rubber products are widely used in automotive (tyres, tapes, hoses, gaskets, molded parts, liners), industry (adhesives, gaskets, tapes, vibration dampers, cable jackets, hoses), consumer goods ( toys, rubber mats, molded parts) and construction (wire insulation, molded parts, coils, seals and adhesives). In 2017, my country's synthetic rubber production capacity reached 6 million tons, and the market demand is large. In the production process of synthetic rubber, the polymerized monomer is usually mixed with an organic solvent and then co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/144C07C7/20C07C11/18
CPCC07C7/144C07C7/20C07C11/18Y02P20/10
Inventor 辛益双赵晓冬胡保利
Owner CHINA PETROLEUM & CHEM CORP
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