A rapid, centrifugal method to prepare polysilazanes and separate them from their ammonium halide-anhydrous, liquid ammonia by-product is coupled with several, alternative methods to recover ammonium halide and anhydrous, liquid ammonia from the by-product. Some reactive modes of by-product recovery lead to sodium chloride as the sole waste product or, optionally, to ammonia borane as a secondary product of the process.

A rapid, centrifugal method to prepare polysilazanes and separate them from their ammonium halide-anhydrous, liquid ammonia by-product is coupled with several, alternative methods to recover ammonium halide and anhydrous, liquid ammonia from the by-product. Some reactive modes of by-product recovery lead to sodium chloride as the sole waste product or, optionally, to ammonia borane as a secondary product of the process.

A method for the synthesis of anhydrous quaternary ammonium hydroxides having the formula (NR.sub.1R.sub.2R.sub.3R.sub.4) OH, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same as or different from one another and are each individually selected from H, C.sub.1-C.sub.10 alkyls including linear or cyclo alkyls, and C.sub.6-C.sub.12 aryls by reacting an alkylene oxide with a tertiary amine having the formula R.sub.1R.sub.2R.sub.3N wherein R.sub.1, R.sub.2, and R.sub.3 are the same or different and are each individually selected from C.sub.1-C.sub.10 alkyls including linear and cyclo alkyls, C.sub.1-C.sub.10 hydroxyalkyls, C.sub.6-C.sub.12 aryls, and formulations having anhydrous quaternary ammonium hydroxides.

A method for the synthesis of anhydrous quaternary ammonium hydroxides having the formula (NR.sub.1R.sub.2R.sub.3R.sub.4) OH, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same as or different from one another and are each individually selected from H, C.sub.1-C.sub.10 alkyls including linear or cyclo alkyls, and C.sub.6-C.sub.12 aryls by reacting an alkylene oxide with a tertiary amine having the formula R.sub.1R.sub.2R.sub.3N wherein R.sub.1, R.sub.2, and R.sub.3 are the same or different and are each individually selected from C.sub.1-C.sub.10 alkyls including linear and cyclo alkyls, C.sub.1-C.sub.10 hydroxyalkyls, C.sub.6-C.sub.12 aryls, and formulations having anhydrous quaternary ammonium hydroxides.

The present invention is directed to a condensed phase batch process for synthesis of trisilylamine (TSA). An improved synthesis method that incorporates a solvent to help promote a condensed-phase reaction between ammonia gas (or liquid) and liquified monochlorosilane (MCS) in good yields is described. This method facilitates the removal of the byproduct waste with little to no reactor down time, substantial reduction of down-stream solids contamination and high-purity product from first-pass distillation.

The present invention is directed to a condensed phase batch process for synthesis of trisilylamine (TSA). An improved synthesis method that incorporates a solvent to help promote a condensed-phase reaction between ammonia gas (or liquid) and liquified monochlorosilane (MCS) in good yields is described. This method facilitates the removal of the byproduct waste with little to no reactor down time, substantial reduction of down-stream solids contamination and high-purity product from first-pass distillation.

A process for producing ammonia and a derivative of ammonia from a natural gas feed comprising conversion of natural gas into a make-up synthesis gas; synthesis of ammonia; use of said ammonia to produce said derivative of ammonia, wherein a portion of the natural gas feed is used to fuel a gas turbine; power produced by said gas turbine is transferred to at least one power user of the process, such as a compressor; heat is recovered from exhaust gas of said gas turbine, and at least part of said heat is recovered as low-grade heat available at a temperature not greater than 200 C., to provide process heating to at least one thermal user of the process, such as CO2 removal unit or absorption chiller; a corresponding plant and method of modernization are also disclosed.

A rapid, centrifugal method to prepare polysilazanes and separate them from their ammonium halide-anhydrous, liquid ammonia by-product is coupled with several, alternative methods to recover ammonium halide and anhydrous, liquid ammonia from the by-product. Some reactive modes of by-product recovery lead to sodium chloride as the sole waste product or, optionally, to ammonia borane as a secondary product of the process.

A rapid, centrifugal method to prepare polysilazanes and separate them from their ammonium halide-anhydrous, liquid ammonia by-product is coupled with several, alternative methods to recover ammonium halide and anhydrous, liquid ammonia from the by-product. Some reactive modes of by-product recovery lead to sodium chloride as the sole waste product or, optionally, to ammonia borane as a secondary product of the process.

The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant in which such a process can be carried out with advantage.