Process and use of amino-functional resins for dismutating halosilanes and for removing extraneous metals

A process for dismutating a trichlorosilane, the process comprising:

• first washing a particulate, organic, amino-functional resin with deionized water, the resin comprising a dialkylamino- or dialkylaminomethylene-functionalized divinylbenzene-styrene copolymer or trialkylammonium- or trialkylammoniummethylene-functionalized divinylbenzene-styrene copolymer, to obtain a water-containing resin;
• then applying reduced pressure or vacuum to the water-containing resin and regulating the temperature at below 200° C., and then removing the reduced pressure or vacuum, thereby obtaining an anhydrous and solvent-free catalyst resin having a water content of less than 2% by weight, without contacting the resin with an organic solvent after washing with the deionized water;
• and
• conducting a reactive distillation or reactive rectification of a trichlorosilane-containing stream with the anhydrous and solvent-free catalyst resin, to obtain at least two silanes, thereby reducing a content of a compound comprising boron, iron, or both to less than 10 μg/kg,
• wherein:
• the at least two silanes are represented by formula (II):
• HaSiClb (II);
• a and b are integers;
• a=0, 2, 3 or 4;
• b=0, 1, 2 or 4;
• a+b=4;
• the catalyst resin, then contacted with the trichlorosilane, has a water content, if present, of less than 2% by weight and an organic solvent content, if present, of 2.5% by weight or less;
• the content of the compound comprising boron, iron, or both is reduced by from 70 to 99% by weight;
• and
• the reactive distillation or reactive rectification comprises reaction and distillative separation in one apparatus.