It is manufactured a follow sealant to neuter pen with synthetic oil and white carbon black, this sealant possesses good follow performance, and can satisfy the sealing requirement of neuter pen.

Taking the carbon black similar to soot as the test material, the oil's dispersancy is evaluated through the oil's viscosity change after blending the carbon black into the oil under high speed.

Catalytic cracking oil slurry after filtration separation can be used to manufacture carbon black, needle coke, carbon fibrous material, plasticizer and so on.