Exhibit 24 POWER OF ATTORNEY I, Kelcey Hoyt, an officer of Praxair, Inc. (the "Corporation"), hereby authorize and designate each of Guillermo Bichara, or Anthony M. Pepper my agent and attorney in fact, with full power of substitution, to: (1) prepare and sign on my behalf any Form 3, Form 4 or Form 5 under Section 16 of the Securities Exchange Act of 1934 and any amendments thereto, and file the same with the Securities and Exchange Commission and the New York Stock Exchange; (2) prepare and sign on my behalf any Form 144 Notice under the Securities Act of 1933 and any amendments thereto and file the same with the Securities and Exchange Commission; and (3) do anything else necessary or proper in connection with the forgoing This power of attorney shall remain in effect as long as I am subject to Section 16 with respect to the Corporation, and shall not be affected by my subsequent disability or incompetence. /s/ Kelcey Hoyt Kelcey Hoyt Dated: July 28, 2016