Abstract: The present invention is directed to an improved reaction process that allows for the achievement of excellent NF3 production yields, while minimizing the amount of unreacted fluorine exiting with the process gases and minimizing the amount of liquid melt waste (HF/NH3) produced by the process. The basic NF3 process resides in reacting F2 with an ammonium ion source, e.g., ammonium acid fluoride, under conditions for forming NF3. The improvement in the process comprises: introducing F2 and said ammonium ion source cocurrently and downflow through a packed column or monolith column at a first temperature; reacting said F2 and ammonium ion source in said column; and, removing a mixture of NF3 and byproducts from said column at a second temperature higher than said first temperature.

Abstract: The present invention is directed to an improved reaction process that allows for the achievement of excellent NF3 production yields, while minimizing the amount of unreacted fluorine exiting with the process gases and minimizing the amount of liquid melt waste (HF/NH3) produced by the process. The basic NF3 process resides in reacting F2 with an ammonium ion source, e.g., ammonium acid fluoride, under conditions for forming NF3. The improvement in the process comprises: introducing F2 and said ammonium ion source cocurrently and downflow through a packed column or monolith column at a first temperature; reacting said F2 and ammonium ion source in said column; and, removing a mixture of NF3 and byproducts from said column at a second temperature higher than said first temperature.

Abstract: The invention is directed to an improvement in a catalytic process for the ring hydrogenation of a methylenedianiline feedstock, including crude methylenedianiline. One component of the improvement is a pretreatment process which resides in passing the crude methylenedianiline feedstock over a ruthenium catalyst carried on a fixed bed support, cooling without venting, and then hydrogenation of the pretreated crude methylenedianiline feedstock over a rhodium catalyst or a mixed Rh/Ru catalyst carried on a monolith support and carrying out the ring hydrogenation in a batch reaction. Another component in the improvement is the employment of a catalyst comprised of rhodium and ruthenium carried on a monolith support.

Abstract: This invention relates to a process for the catalytic hydrogenation of impurity laden methylenedianiline feedstocks commonly referred to a MDA-50 and MDA-60. The process for hydrogenating methylenedianiline containing at least 40% oligomer function by weight comprises: contacting the feedstock with hydrogen in the presence of a rhodium/ruthenium containing catalyst system carried on a lithium aluminate support under conditions for effecting ring hydrogenation.