A process and device for continuous production of polybutene-1

Abstract

The invention discloses a technology for producing polybutylene-1 through a continuous method. The technology comprises the following steps that butene-1 is taken as a raw material in a prepolymerization kettle, titanium serving as a catalyst, aluminum alkyl serving as a cocatalyst, silane serving as an electron donor and hydrogen serving as a molecular weight regulator enter the prepolymerization kettle through a quantifier and then enter a slurry polymerization reaction kettle after being prepolymerized for 5-15 minutes, and slurry polymerization is performed at the temperature of 25 DEG C-55 DEG C under the pressure of 0.6 MPa-1.6 MPa; slurry liquid generated through slurry polymerization enters a gas-phase horizontal reaction kettle with the help of the differential pressure, gas-phase polymerization is performed at the temperature of 30 DEG C-60 DEG C under the pressure of 0.5 MPa-1.5 MPa, and gasified butene-1 is condensed through a condenser and then sent back to the gas-phase horizontal reaction kettle; gas-solid separation is performed; slurry liquid generated through gas-phase polymerization enters a material receiving tank, pressure reduction and separation are performed, and the polybutylene-1 powder is obtained. According to the technology and device for producing the polybutylene-1 through the continuous method, the requirement for equipment is low, no solvent removing process exists, and the device is simple in process, easy to operate and smooth and steady in operation.

Description

technical field [0001] The invention relates to a process and a device for continuously producing polybutene-1. Background technique [0002] The existing polybutene-1 synthesis production techniques include slurry method, bulk method and gas phase method, and the production is carried out intermittently or continuously. At present, the production methods of polybutene-1 adopted in the world are mainly gas phase method and double reactor series bulk solution method. [0003] The gas phase method is usually carried out by a gas phase ebullating bed process, using a highly active Ziegler-Natta catalytic system, the polymerization temperature is 45-65°C, the ratio of hydrogen to butene-1 is 0.001-0.01mol / mol, and the polymerization activity reaches 100-200KgPB / gTi. To obtain a stable type I crystal polymer, only three steps of separation, drying and granulation are required. However, the gas phase method requires high technology and equipment. [0004] The bulk solution po...

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Problems solved by technology

[0004] The bulk solution polymerization process adopts double reactors in series, which greatly improves the catalyst activity, but the efficiency is low and the cost is high

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