Coacervation technology for polymer product production

Abstract

The invention discloses a coacervation technology for polymer product production, and concretely relates to an energy-saving and consumption reduction process, process conditions and operation modes of the coacervation technology for polymer product production. The coacervation technology for polymer product production is especially suitable for a styrene-butadiene-styrene block copolymer (SBS) production device. The coacervation technology for polymer product production combines a three-reactor differential pressure coacervation technology and a rubber particle coacervation technology, and thus the coacervation technology for polymer product production is a novel, energy-saving and low-energy consumption SBS coacervation technology, can effectively alleviate a contradiction between energy saving and consumption reduction, can reduce solvent consumption and a steam use amount, and can be utilized for a SBS production device of the Yanshan petrochemical company.

Description

technical field [0001] The invention belongs to the production process category of polymer products, and is especially suitable for the coagulation process of styrene-butadiene-styrene block copolymer (SBS) by water analysis method. Background technique [0002] Coagulation products, especially the coagulation processes used in SBS industrial production equipment mainly include: single-tank coagulation process, double-tank parallel coagulation process and double-tank series coagulation process. The single-tank coagulation process has less equipment and is easy to operate, but high energy and material consumption; the two-tank series process is easy to control, has high energy consumption, and the solvent content in the glue fluctuates greatly; the two-tank parallel process is more difficult to control, but the steam consumption Low, most of the advanced SBS production equipment adopts double-tank parallel production process. [0003] The coagulation process using double ket...

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Problems solved by technology

[0004] When adopting double-tank temperature-difference coagulation, if the operating pressure is used to save energy, the pressure of the two tanks must be increased at the same time, which is not conducive to the vaporization of the solvent in the colloidal particles, and will greatly increase the solvent consumption; in addition, the liquid level of the coagulation tank is easy to fluctuate, which affects stable production.

When using double-pot pressure differential condensation, the two coagulation pots can maintain different pressures, so that the steam consumption can be reduced by increasing the operating pressure of the first (1#) coagulation pot, and by reducing the operating pressure of the second (2#) coagulation pot Reduce part of the solvent consumption, but the overall problem is that the solvent consumption is high and a large amount of organic matter is directly discharged

[0005] With the continuous progress of society and the continuous enhancement of people's awareness of energy conservation and environmental protection, reducing costs and reducing the discharge of "three wastes" in the production process have become the focus and main direction that enterprises must pay attention to. In comparison, there is still a large gap in terms of energy consumption, material consumption and solvent consumption, so the development of a new SBS coagulation process to further reduce consumption has become one of the hot issues in this field.

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