The present invention relates, in part, to the discovery that the presence of HF in a HCFC-244bb feedstream in a reaction for the preparation of HFO-1234yf results in selectivity changeover from HFO-1234yf to HCFO-1233xf. By substantially removing HF, it is shown that the selectivity to HFO-1234yf via dehydrochlorination of HCFC-244bb is improved.

The present disclosure provides methods to produce 5-(halomethyl)furfural, including 5-(chloromethyl)furfural, by acid-catalyzed conversion of C6 saccharides, including isomers thereof, polymers thereof, and certain derivatives thereof. The methods make use of acids with lower concentrations, and allows for conversion of sugars into 5-(halomethyl)furfural at higher temperatures and faster reaction or residence times.

The present disclosure provides methods to produce 5-(halomethyl)furfural, including 5-(chloromethyl)furfural, by acid-catalyzed conversion of C6 saccharides, including isomers thereof, polymers thereof, and certain derivatives thereof. The methods make use of acids with lower concentrations, and allows for conversion of sugars into 5-(halomethyl)furfural at higher temperatures and faster reaction or residence times.

Provided is a PET chemical recycling method. The PET chemical recycling method includes the following: adding a PET chemical recycling ion catalyst material for PET chemical recycling to PET waste and ethylene glycol; heating and stirring to obtain depolymerized and decolorized bis(2-hydroxyethyl)terephthalate (BHET); and filtering and recycling the ion catalyst material for PET chemical recycling. The PET chemical recycling ion catalyst material is a bisalkylimidazole-metal tetrachloride ionic liquid grafted on a porous carrier.

Provided is a PET chemical recycling method. The PET chemical recycling method includes the following: adding a PET chemical recycling ion catalyst material for PET chemical recycling to PET waste and ethylene glycol; heating and stirring to obtain depolymerized and decolorized bis(2-hydroxyethyl)terephthalate (BHET); and filtering and recycling the ion catalyst material for PET chemical recycling. The PET chemical recycling ion catalyst material is a bisalkylimidazole-metal tetrachloride ionic liquid grafted on a porous carrier.

A method for preparing a phosphine compound using pyrophosphorous acid is provided. A phosphine oxide compound or a phosphine sulfide compound is reacted with reducing agent pyrophosphorous acid (H.sub.4P.sub.2O.sub.5) with or without impurities under stirring in the presence of a catalyst to produce a reaction product, where the catalyst is elementary halogen (X.sub.2) or halide (M.sub.XX.sub.Y). After the reaction is completed, the reaction product is subjected to water washing, extraction and purification to obtain the target phosphine compound.

A method for preparing a phosphine compound using pyrophosphorous acid is provided. A phosphine oxide compound or a phosphine sulfide compound is reacted with reducing agent pyrophosphorous acid (H.sub.4P.sub.2O.sub.5) with or without impurities under stirring in the presence of a catalyst to produce a reaction product, where the catalyst is elementary halogen (X.sub.2) or halide (M.sub.XX.sub.Y). After the reaction is completed, the reaction product is subjected to water washing, extraction and purification to obtain the target phosphine compound.

The present disclosure provides methods to produce 5-(halomethyl)furfural, including 5-(chloromethyl)furfural, by acid-catalyzed conversion of C6 saccharides, including isomers thereof, polymers thereof, and certain derivatives thereof. The methods make use of acids with lower concentrations, and allows for conversion of sugars into 5-(halomethyl)furfural at higher temperatures and faster reaction or residence times.

The present disclosure provides methods to produce 5-(halomethyl)furfural, including 5-(chloromethyl)furfural, by acid-catalyzed conversion of C6 saccharides, including isomers thereof, polymers thereof, and certain derivatives thereof. The methods make use of acids with lower concentrations, and allows for conversion of sugars into 5-(halomethyl)furfural at higher temperatures and faster reaction or residence times.

The present invention describes method of preparation of amides of lactyl lactates of general formula I, where Z denotes to group of RRN and R represent alkyl, aryl or H from lactide and the lactide reacts with an aliphatic or aromatic amine with 1 to 100 carbon atoms of general formula RRNH or with an aliphatic or aromatic ammonium hydrohalide with 1 to 100 carbon atoms of general formula RRNH.Math.HX, where X is selected from Cl, Br and I in a non-chlorinated organic aliphatic or aromatic solvent or in a melted mixture of lactide under solvent free condition, and when lactide reacts with amine, initiator derived from group of Lewis acids of halides of 4., 12., 13., and 14. group is added. ##STR00001##