FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * LEBOEUF RAYMOND W   2. Issuer Name and Ticker or Trading Symbol PRAXAIR INC [PX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O PRAXAIR, INC., 39 OLD RIDGEBURY ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/28/2011 (Street) DANBURY, CT 06810-5113 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/28/2011   M   5,000 A $ 28.76 7,000 D   Common Stock 02/28/2011   S   5,000 D $ 98.9196 (1) 2,000 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option (right to buy)

$ 28.76

02/28/2011

M

5,000

04/01/2004(2)

04/01/2013

Common Stock

5,000

$ 0

0

D

Stock Option (right to buy)

$ 37.26

04/01/2005(2)

04/01/2014

Common Stock

5,000

5,000

D

Stock Option (right to buy)

$ 47.64

04/01/2006(2)

04/01/2015

Common Stock

5,000

5,000

D

Stock Option (right to buy)

$ 48.26

09/19/2006(2)

09/19/2015

Common Stock

275

275

D

Stock Option (right to buy)

$ 53.98

02/28/2007(2)

02/28/2016

Common Stock

7,620

7,620

D

Stock Option (right to buy)

$ 61.47

02/27/2008(2)

02/27/2017

Common Stock

6,550

6,550

D

Stock Option (right to buy)

$ 83.89

02/26/2009(3)

02/26/2018

Common Stock

3,885

3,885

D

Stock Option (right to buy)

$ 60.92

02/24/2010(4)

02/24/2019

Common Stock

4,600

4,600

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LEBOEUF RAYMOND W C/O PRAXAIR, INC. 39 OLD RIDGEBURY ROAD DANBURY, CT 06810-5113	X

Signatures

Anthony M. Pepper, Attorney-in-Fact		03/01/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The $98.9196 price reported is the weighted average sale price. The sale prices ranged from $98.90 to $98.96 per share. Upon request of the SEC Staff, Praxair, Inc. or a security holder of Praxair, Inc., the reporting person will provide full information regarding the number of shares sold at each separate price.
(2)	This option became exercisable in three (3) equal annual installments beginning on the first anniversary of the date of grant.
(3)	This option vests over three years in three consecutive equal annual installments beginning on February 26, 2009.
(4)	This option vests over three years in three consecutive equal annual installments beginning on February 24, 2010.

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