Is it possible to recover myether wallet whose private key have been lost ? I still have the wallet address but have no access to it .
No, there is no easy way to do it. Although if you had a quantum computer then you could give it a shot!!!
Simple answer is that private keys can't be derived from wallet address, which is also known as public key. As coco23 mentioned above, if that could be done, then there was no point of blockchain and cryptos.