Domestic dispersing agent HPMC had been successfully tested to replace the expensive imported dispersing agent HPMC in 127 m~3 polymerizer in Shanghai Chlor-Alkali Chemical Industry Co.

The application of high-pressure water fluidics in the cleaning of polymerizer;

The control of temperature during the warming up of polymerizer;

Influences of different samples on the examination results of tensile strength of polymerizer head;

The process of SG-8 resin production by 30m3 polymerizer were introduced.

According to the characteristics of volume shrinkage constantly in suspension polymerization of vinyl chloride monomer, the process of continuous water injection in midway of polymerization was developed, and it was used in 30m3 polymerizer, and got lots of benefits, such as reducing energy consumption, increase in batch yield and economic benefits.

Based on the features of PVC polymerizayion kettle in Taiyuan Chemical Company Group and its requirements to temperature,the combination control methods to program control,cascade control and follow up control were adopted to control the temperature of polymerization kettle and gained satisfied effect.

The influence factors of heat on the top of condenser with its temperature, fluctuate and disability for the first polymerization kettle in polypropylene plant and the cause of temperature control run away were analyzed .

In this short paper the actual information of polyproplene production in the plastic plant is introduced, improvements on the substitution heat ability of polymerization kettle has been made and succeed.

The development of BLF43 prepolymerizer and its structural characteristics;