TY - GEN
T1 - Effect of pH on the phosphorous components in tetra-hydroxymethyl phosphonium chloride solution
AU - Shao, Shuangxi
AU - Jiang, Lan
AU - Li, Ya
AU - Shi, Kaiqi
PY - 2012
Y1 - 2012
N2 - At present, tetra-hydroxymethyl phosphonium chloride (THPC) is widely used in flame retardant finishing, industrial water treatment and leather manufacture industry etc., and its decomposition which was caused by pH changing will influence on the actual application. So acid-alkali decomposition of THPC was studied by 31P Nuclear Magnetism Resomance ( 31P NMR), spectrophotometry and titration respectively. The results show that THPC solution is stable when pH<5.0, containing THPC, tri-hydroxymethyl phosphine (TrHP), and tri-hydroxymethyl phosphine oxide (TrHPO). THPC begins to decompose at pH5.0 and yields an unstable substance tetra-hydroxymethyl phosphonium hydroxide (THPH), whose chemical shifts is 36ppm. At pH8.0, THPC converts to TrHP and TrHPO completely. When pH>9.0, all of the phosphorus compounds converts to TrHPO. Consequently, THPC content decreases when pH of the THPC solution rising, which could give a favorable guide in THPC application.
AB - At present, tetra-hydroxymethyl phosphonium chloride (THPC) is widely used in flame retardant finishing, industrial water treatment and leather manufacture industry etc., and its decomposition which was caused by pH changing will influence on the actual application. So acid-alkali decomposition of THPC was studied by 31P Nuclear Magnetism Resomance ( 31P NMR), spectrophotometry and titration respectively. The results show that THPC solution is stable when pH<5.0, containing THPC, tri-hydroxymethyl phosphine (TrHP), and tri-hydroxymethyl phosphine oxide (TrHPO). THPC begins to decompose at pH5.0 and yields an unstable substance tetra-hydroxymethyl phosphonium hydroxide (THPH), whose chemical shifts is 36ppm. At pH8.0, THPC converts to TrHP and TrHPO completely. When pH>9.0, all of the phosphorus compounds converts to TrHPO. Consequently, THPC content decreases when pH of the THPC solution rising, which could give a favorable guide in THPC application.
KW - Acid-alkali decomposition
KW - P nuclear magnetic resonance
KW - Tetra-hydroxymethyl phosphonium chloride (THPC)
UR - http://www.scopus.com/inward/record.url?scp=84867268332&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.560-561.237
DO - 10.4028/www.scientific.net/AMR.560-561.237
M3 - Conference contribution
AN - SCOPUS:84867268332
SN - 9783037854600
T3 - Advanced Materials Research
SP - 237
EP - 241
BT - Material Sciences and Technology
T2 - 2012 Spring International Conference on Material Sciences and Technology, MST-S
Y2 - 27 May 2012 through 30 May 2012
ER -