Is it is possible to encrypt message using private key in elliptic curve cryptography. clarify the doubt

Yes. EC based encryption relies on key agreement though, more like Diffie-Hellman than RSA.

Regards,

David

Doubt which i have s , CipherText={kG, Pml+k*PB} produced by ECC after encryption. First co-ordinate obtained by multiplied random number 'k' with base point. Second co-ordinate s pml which is message in (x,y) co-ordinate , K* PB indicates multiply random no with public key which produce a (x,y) co- ordinate, which is added with Pml.

Problem which i have s In place of publickey i need to use private key. if i use private key which is random no. it is not possible to add Pml with k*private key, becoz it will be like "(x,y)+ some number". This is operation not possible in ECC