| 摘要 |
The invention relates to a method for producing mixtures of alkylphosphonous acid and dialkylphosphinic acid salts, characterized in that a) a phosphinic acid source (I) is reacted with olefins (II) in the presence of a catalyst A to obtain a mixture of alkylphosphonous acid (III) and dialkylphosphinic acid (IV) or salts or esters thereof, and b) the thus obtained mixture of alkylphosphonous acid (III) and dialkylphosphinic acid (IV) or the salts or esters thereof is reacted with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K and/or a protonated nitrogen base to obtain the corresponding mixtures of alkylphosphonous acid salt (V) and dialkylphosphinic acid salt (VI) of said metals and/or a nitrogen compound, (V) (VI), wherein Y represents Mg, Ca, AI, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na; K and/or a nitrogen compound and n represents ¼, ⅓, ½, 1. |
| 主权项 |
1. A process for preparing mixtures of alkylphosphonous salts and dialkylphosphinic salts, comprising the steps of:
a) reacting a phosphinic acid source (I) with ethylene in the presence of a catalyst A to give a mixture of alkylphosphonous acid (III) and dialkylphosphinic acid (IV) or salts or esters thereof where R1, R2, R3, R4 are each H, and A and B are each ethyl and X is H, Mg, Ca, Ba, Al, Pb, Fe, Zn, Mn, Ni, Li, Na, K, where m is ⅓, ½, 1, and the catalyst A is a free-radical initiator and b) reacting the mixture of alkylohosphonous acid (III) and dialkylphosphinic acid (IV) or salts or esters thereof with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K to give the mixtures of alkylphosphonous salt (V) and dialkylphosphinic salt (VI) of these metals, or a combination thereof where A and B are each ethyl and Y is Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, or a combination thereof and n is ¼, ⅓, ½, 1 and wherein the mixture of alkylphosphonous salt (V) and dialkylphosphinic salt (VI) comprises 3 to 30% by weight of alkylphosphonous salt (V) and 70 to 97% by weight of dialkylphosphinic salt (VI). |
