Parallel reactor systems for synthesizing materials are disclosed. The reactor systems may include at least two reaction vessels and may be suitable for synthesizing materials produced from corrosive reagents, for example, Ziegler-Natta catalysts. Antechambers may be provided above the reaction vessels to help purge vapors produced by the corrosive reagents. Methods for preparing materials by use of such parallel reactor systems are also disclosed.

Parallel reactor systems for synthesizing materials are disclosed. The reactor systems may include at least two reaction vessels and may be suitable for synthesizing materials produced from corrosive reagents, for example, Ziegler-Natta catalysts. Antechambers may be provided above the reaction vessels to help purge vapors produced by the corrosive reagents. Methods for preparing materials by use of such parallel reactor systems are also disclosed.

Provided are a preparation method of an ion catalyst material for PET chemical recycling and a PET chemical recycling method. The preparation method of an ion catalyst material for PET chemical recycling includes the following. A metal chloride is added to an alkylimidazole-chloride ionic liquid to form a bisalkylimidazole-metal tetrachloride ionic liquid that is grafted on a porous carrier.

Provided are a preparation method of an ion catalyst material for PET chemical recycling and a PET chemical recycling method. The preparation method of an ion catalyst material for PET chemical recycling includes the following. A metal chloride is added to an alkylimidazole-chloride ionic liquid to form a bisalkylimidazole-metal tetrachloride ionic liquid that is grafted on a porous carrier.

A method for dehydrocoupling silanes and amines. The method comprises contacting: (a) an aliphatic amine; (b) a silane; and (c) a catalyst which is ZnX.sub.2, wherein X is alkyl, chloride, bromide, iodide, trifluoromethanesulfonate, bis(trifluoromethane)sulfonamide, tosylate, methanesulfonate or O.sub.3S(CF.sub.2).sub.xCF.sub.3 wherein x is an integer from 1 to 10.

A method for dehydrocoupling silanes and amines. The method comprises contacting: (a) an aliphatic amine; (b) a silane; and (c) a catalyst which is ZnX.sub.2, wherein X is alkyl, chloride, bromide, iodide, trifluoromethanesulfonate, bis(trifluoromethane)sulfonamide, tosylate, methanesulfonate or O.sub.3S(CF.sub.2).sub.xCF.sub.3 wherein x is an integer from 1 to 10.

The present invention relates, at least in part, to a process for making chlorotrifluoroethylene (CFO-1113) from 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a). In certain aspects, the process includes dehydrochlorinating 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) in the presence of a catalyst selected from the group consisting of (i) one or more metal halides; (ii) one or more halogenated metal oxides; (iii) one or more zero-valent metals or metal alloys; (iv) combinations thereof.

The present invention relates to the use of haloapatites as catalysts of the dehydration reaction of α-hydroxylated carboxylic acids or acid esters, in particular of lactic acid or of methyl lactate, and also to a process for producing unsaturated carboxylic acids or acid esters, in particular acrylic acid or methyl acrylate, in the gas phase in a stainless steel reactor, in the presence of such a catalyst.

Disclosed is a process for the preparation of 2,3,3,3-tetrafluoropropene, comprising the following two reaction steps: a. a compound having the formula CF.sub.3-xCl.sub.xCF.sub.2-yCl.sub.yCH.sub.2Cl undergoes gas-phase fluorination with hydrogen fluoride through n serially-connected reaction vessels in the presence of a compound catalyst producing 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≦x+y≦5; b. the 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane undergo gas-phase dehalogenation with hydrogen in the presence of a dehalogenation catalyst, producing 2,3,3,3-tetrafluoropropene and 3-chloro-2,3,3-trifluoropropene, then separation and refining are performed, producing 2,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.

Disclosed is a process for the preparation of 2,3,3,3-tetrafluoropropene, comprising the following two reaction steps: a. a compound having the formula CF.sub.3-xCl.sub.xCF.sub.2-yCl.sub.yCH.sub.2Cl undergoes gas-phase fluorination with hydrogen fluoride through n serially-connected reaction vessels in the presence of a compound catalyst producing 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≦x+y≦5; b. the 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane undergo gas-phase dehalogenation with hydrogen in the presence of a dehalogenation catalyst, producing 2,3,3,3-tetrafluoropropene and 3-chloro-2,3,3-trifluoropropene, then separation and refining are performed, producing 2,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.