Rathore is considered a Raje loyalist, while Kataria is a senior leader in the state BJP unit.
Portfolios are expected to be allocated to the new ministers either Friday night or in the next couple of days, sources close to Raje told IANS.
Vasundhara Raje was sworn in as Rajasthan chief minister Dec 13 for the second time after the BJP wrested the state from the Congress in the state assembly polls, winning 163 seats in the 200-member house.