Process for manufacture of tetrakis-(hydroxymethyl)-phosphonium

Details Process for manufacture of tetrakis-(hydroxymethyl)-phosphonium Process for manufacture of tetrakis-(hydroxymethyl)-phosphonium

1975-11-26

1977-08-23

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260541, 2606065P, C07F 954

Patent

active

040440559

ABSTRACT:
Tetrakis-(hydroxymethyl)-phosphonium salts (TKX salts) are produced by countercurrent contacting of phosphine gas with aqueous solution of formaldehyde and a selected acid in a multistage reactor. In the countercurrent contacting reactor, phosphine is practically exhausted at the liquid feed end while at the other end the formaldehyde is exhausted. When the formaldehyde end point is exceeded in the reactor, phosphine reacts with product TKX salt to produce trihydroxymethylphosphine (THP). Product taken from the reactor is adjusted to end point by addition of formaldehyde as needed to convert THP to TKX.

REFERENCES:
patent: 2743299 (1956-04-01), Flynn et al.
patent: 3013085 (1961-12-01), Buckler
patent: 3243450 (1966-03-01), Grayson
patent: 3666817 (1972-05-01), Carlson
patent: 3835194 (1974-09-01), Leavitt

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