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# United States Patent [19J 

# Bryant et al. 

# [54] METAL-LIGAND COMPLEX CATALYZED PROCESSES 

[75] Inventors: David Robert Bryant, South Charleston; James Clair Nicholson, St. Albans; John Robert Briggs, Charleston; Diane Lee Packett, South Charleston; John Michael Maher, Charleston, all of W. Va. 

[73] Assignee: Union Carbide Chemicals & Plastics Technology Corporation., Danbury, Conn. 

[ *] Notice: The term of this patent shall not extend beyond the expiration date of Pat. Nos. 5,786,517 and 5,744,649. 

[21] Appl. No.: 818,780 

[22] Filed: Mar. 11, 1997 

[63] Continuation-in-part of Ser. No. 753,503, Nov. 26, 1996, Pat. No. 5,786,517. 

## [30] Foreign Application Priority Data 

<img src='content_image/934927.jpg'>

[51] Int. Cl. 6 ..................................................... C07C 45/50 

## Related U.S. Application Data 

<img src='content_image/934911.jpg'>

# [11] Patent Number: 5,886,235 

# [45] Date of Patent: *Mar. 23, 1999 

[52] U.S. Cl. ............................................. 568/454; 568/451 

[58] Field of Search ...................................... 568/451, 454 

## [56] References Cited 

Search Report (PCT Search Report) Mar. 14, 1997. 

Primary Examiner----Shailendra Kumar 

Assistant Examiner----Sreeni Padmanabhan 

Attorney, Agent, or Firm-Gerald L. Coon 

## [57] ABSTRACT 

This invention relates to a process for separating one or more phosphorus acidic compounds from a reaction product fluid containing said one or more phosphorus acidic compounds, a metal-organophosphorus ligand complex catalyst and optionally free organophosphorus ligand which process comprises treating said reaction product fluid with water sufficient to remove at least some amount of said one or more phosphorus acidic compounds from said reaction product fluid. 

<img src='content_image/934932.jpg'>

9616923 6/1996 WIPO . 

US005886235A 

## U.S. PATENT DOCUMENTS 

## FOREIGN PATENT DOCUMENTS 

## OTHER PUBLICATIONS 

## 20 Claims, 1 Drawing Sheet 

