Helix stirred reactor with cryogen gong through inside, application, and technical method of polyreaction

Abstract

The invention relates to a screw agitation reactor of the freezing mixture and the use and the polyreaction technique. The reactor includes the support, the tubular material trough which has the material entrance and the export circle, the bearing, the spiral stirrer, the gland seal and the power dragging turning gear. It is suitable for producing polymer by the solution polymerization method technological process like synthetic rubber, the plastic and the textile fiber, especially suitable for synthesizing isoprene rubber and cis-butadiene rubber in the rare earths catalysis system. It replaces the complete mixing flow type of the completely backmixing by the plug flow type of no backmixing, strengthened the polyreaction process and the heat transfer process, the reactor volume is reduced obviously, the energy consumption is reduced largely, the polymer performance is enhanced.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis technology and equipment, and relates to a spiral stirring reactor with a refrigerant inside, its use and innovation of a polymerization reaction process method. Background technique [0002] At present, a large number of polymers—synthetic rubber, plastics, and fibers—are synthesized by solution methods. That is, the monomer is polymerized in a corresponding large amount of solvent to form a polymer with a certain molecular weight, forming a high-viscosity polymer solution, and then the polymer is separated by condensation stripping. The polymerization process of monomers is the core and key process of the whole polymer production. [0003] Since the polymerization reaction rate of the high-concentration polymer solution is very low, in order to achieve a certain conversion rate, the reaction time is very long, usually several hours. For this reason, both at home and abroad (Synthetic...

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Problems solved by technology

The power of the stirring motor for a 20-30 cubic meter polymerization tank is 55-75kW, which is quite energy-consuming, and this energy is converted into stirring heat, which further increases the load of heat removal

[0016] None of the above technologies can get rid of the scope of the fully mixed stirred tank. The strong back-mixing of the material in the tank makes the reaction time longer, the reactor volume is larger, the stirring structure is complicated, and the energy consumption is higher.

[0017] Due to the high viscosity of the material in the traditional solution polymerization process, the mixing and heat transfer of the polymerization tank is difficult, so the monomer concentration of the reaction material is limited. For example, the monomer feeding concentration of the rare earth isoprene rubber polymerization reaction is 100 kg / cubic m, the polymerization conversion rate is 80%, and the reaction time reaches 7 hours

Even if the polymerization reaction is strengthened, the monomer feeding concentration of the reaction is 120 kg / m3, the polymerization conversion rate is 70%, and the reaction time is shortened to 3.5 hours (Yu Leshun, Synthetic Rubber Industry, 1986, 9 (4), 239), and the annual output For a 30,000-ton production facility, the polymerization reaction also requires three 48-cubic-meter stirring tanks (stirring motor power 100kW) connected in series, the equipment is large in size and high in energy consumption

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