3results about How to "Process economy" patented technology

The invention provides a reactor comprising a reaction chamber having a catalytic surface in contact with reactants in said chamber; and a source for passing electrical current through said catalytic surface. The reactor can be used for dehydrohalogentation reactions, such as dehydrochlorination of HCFC-244bb to HFO-1234yf, and for reactions where zero valent metals are employed for catalysis. The invention further provides a process to prepare HFO-1234yf from HCFC-244bb using an electrically heated reaction chamber.

The invention provides a method for activating an alkane C (sp3)-H bond through photocatalysis and constructing a C-C bond with aza-aromatic hydrocarbon. The method comprises the following steps: adding an aza-aromatic compound, an alkyl compound and acid into a solvent to obtain a solution A; and irradiating the solution A with visible light in an oxygen-containing atmosphere to obtain the photocatalyst. According to the method, the C (sp3)-H bond of the alkyl compound is successfully activated by utilizing a photochemical method under the condition of no introduction of a metal catalyst, a photocatalyst and a strong oxidant, the C-C bond construction of the alkyl compound and the aza-aromatic hydrocarbon compound is realized, the whole process is simple and efficient, the reaction conditions are mild, the preparation way of the alkyl-substituted aza-aromatic hydrocarbon compound is expanded, and the method is suitable for industrial production. The method is very favorable for popularizing the synthetic route of the coupling reaction of the alkane C (sp3)-H bond and aza-aromatic hydrocarbon.

The invention provides a reactor comprising a reaction chamber having a catalytic surface in contact with reactants in said chamber; and a source for passing electrical current through said catalytic surface. The reactor can be used for dehydrohalogentation reactions, such as dehydrochlorination of HCFC-244bb to HFO-1234yf, and for reactions where zero valent metals are employed for catalysis. The invention further provides a process to prepare HFO-1234yf from HCFC-244bb using an electrically heated reaction chamber.