The results showed that the test temperature had certain influence on the Mooney viscosity,Mooney scorch time and curing behavior of rubber compound;100 ℃ should have been chosen to determine the Mooney viscosity;120 ℃ or 130 ℃ for SBR should have been chosen to determine the Mooney scorch time in order to shorten the test time;185 ℃ should have been chosen to determine the curing behavior;t.

The scorch time t s and dynamic curing index Δ t during mixing in a wider range of temperatures (110～160 ℃) and rotor speeds (40～100 r·min -1 ) on Brabender torque rheometer and the Mooney scorch safety ( t 5 and Δ t 30 ) were measured by using CR mix prepared on an open mill.

For a long term, the coke burning time of the reforming catalyst in the semi-regeneration fixed bed reforming plant of Fujian Refining Chemical Co.

it expounds coke burning method ahead of styrene dehydrogenate catalyst unloading,including coke burning preparation,coke burning procedure and associated issues during the coke burning.

This paper introduces the reasons for poor coke burning effect in FCCUⅠ at SINOPEC Jiujiang Company,including low air flow rate for coke burning,poor stability of regenerator bed,low temperature zone resulted by catalyst returning from catalyst cooler,and low operating linear velocity in dense bed.