Dehydrating and drying method for producing isoprene rubber through solution polymerization process

Abstract

A dehydrating and drying method for producing isoprene rubber through a solution polymerization process comprises the steps as follows: isoprene rubber material synthesized through the solution polymerization process is separated from solvent through a condensation procedure and then is dehydrated through a dehydration sieve; thereafter, the material is continuously fed into an extrusion dehydrating and expansion drying integrated machine, passes through an extrusion dehydrating segment and an expansion drying segment sequentially under the push of a screw rod, and then gets out of a mold plate at the tail end of the expansion drying segment, so as to form the isoprene rubber. The rotational speed of the screw rod is controlled within the range of100 to 250 rpm, the temperature of the extrusion dehydrating segment is 80 to 140 DEG C, and the temperature of the expansion drying segment is 150 to 220 DEG C. While the dehydrating and drying effect of the aftertreatment procedure of isoprene rubber granules is guaranteed, the drying process in the aftertreatment procedure is simplified, so as to reduce device investment and the labor intensity of workers and further reduce production cost.

Description

technical field [0001] The invention belongs to the technical field of synthetic rubber production, and in particular relates to a dehydration and drying method for the production of isoprene rubber by a solution polymerization method. Background technique [0002] In the process of producing isoprene rubber by solution polymerization, the isoprene rubber material from which most of the solvent has been removed through water coagulation requires further removal of volatile substances such as water and residual solvents, and finally forms a block or granular product. In the traditional synthetic rubber production process, the mixture of colloidal particles and water after water analysis and coagulation is first separated from the colloidal particles and a large amount of water through a dehydration vibrating screen, and then the synthetic rubber material with a moisture content of less than 40% enters an extruder Compression dehydration machine, under the extrusion action of ...

AI Technical Summary

Problems solved by technology

Since the two machines rely on mechanical force to finally complete the removal of volatile matter, they have very high requirements for equipment. The characteristics of high equipment cost, high energy consumption, and high requirements for workshops determine the large investment in equipment and high production costs of this process. Features; In addition, because the materials in the post-processing process of isoprene rubber are all solid and granular, easy to block and bond, the materials between the two machines are transported by the position difference, and the labor intensity of the workers is relatively high.

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