Functionalized copolymers of terminally functionalized perfluoro (alkyl vinyl ether) reactor wall for photochemical reactions, process for increasing fluorine content in hydrocarbons and halohydrocarb

Abstract

A photochemical reaction apparatus including a reactor and a light source situated so that light from the light source is directed through a portion of the reactor wall is disclosed. The apparatus is characterized by the portion of the reaction wall comprising a functionalized copolymer of a terminally functionalized perfluoro (alkyl vinyl ether). Also described is a photochemical reaction process using said reactor. The functional group of the copolymer of the apparatus and the process is selected from -SO2F, -SO2CI, -SO3H, -CO2R (where R is H or C1-C3 alkyl), -PO3H2, and salts thereof. A process for increasing the fluorine content of at least one compound selected from hydrocarbons and halohydrocarbons, comprising: (a) photochlorinating said at least one compound, and (b) reacting the halogenated hydrocarbon in (a) with HF. A process for producing an olefinic compound, comprising: (a) photochlorinating at least one compound selected from hydrocarbons and halohydrocarbons containing at least two carbon atoms and at least two hydrogen atoms to produce a halogenated hydrocarbon containing a hydrogen substituent and a chlorine substituent on adjacent carbon atoms; and (b) subjecting the halogenated hydrocarbon produced in (a) to dehydrohalogenation.

Description

field of invention [0001] The invention relates to the field of photochemical reaction, in particular to materials suitable for photochemical reaction devices. Background of the invention [0002] Photochemical reactions use light as an energy source to facilitate chemical processes. Ultraviolet (UV) and visible light are widely used for chemical synthesis in laboratories and industrial manufacturing. Well-known photochemical reactions include photodimerization, photopolymerization, photohalogenation, photoisomerization, and photodegradation. For example, cyclobutanetetracarboxylic dianhydride can be synthesized by photodimerization of maleic anhydride in a glass reactor using mercury UV lamps (P. Boule et al., Tetrahedron Letters, Vol. 11, pp. 865-868, (1976)) . Most vitamin D production in the United States is based on UV photolysis in quartz vessels using light at 275-300 nm. [0003] In the photochlorination reaction, chlorine (Cl 2 ) react with a saturated or unsat...

AI Technical Summary

Problems solved by technology

Quartz is expensive but has a low cut-off wavelength around 160nm; Pyrex TM Glass is less expensive but has a higher cutoff wavelength of about 275nm