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A technology for chlorinating alkanes and chlorination zones, applied in chemical instruments and methods, preparation of halogenated hydrocarbons, organic chemistry, etc., can solve problems such as infeasibility of downstream processes

Active Publication Date: 2022-04-15
SPOLCHEMIE ZEBRA AS
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Problems solved by technology

[0016] Given the understanding that the presence of oxygenated impurities in chlorinated alkane feedstocks may render downstream processes impracticable or at least highly challenging, there is a need for chlorinated alkane compounds containing acceptably low levels of oxygenated impurities and for use in the preparation of such A need exists for efficient and reliable methods of materials

Method used

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Embodiment 1

[0115] Example 1: Chlorination under nitrogen using visible light irradiation

[0116] Chlorination

[0117] Set up a reactor for batch operation consisting of a four-necked Simax TM Composition of glass flasks equipped with stirrer, thermometer, aftercooler, feed and discharge necks, neck for nitrogen introduction, and cooling jacket. The reactor was equipped with a 400 W high pressure Hg external lamp of type RVLX400 with a luminescent layer mainly producing the visible spectrum. The feedstock consisted of pure 1,1,3-trichloropropene distilled fresh just before the experiment and its quality was analyzed by GC and worked up under nitrogen. Small amounts of HCl gas are formed and these, together with traces of chlorine, are cooled by means of an aftercooler / condenser and then absorbed in a caustic soda scrubber. Gaseous chlorine is evaporated from liquid chlorine from a cylinder of mass 2.8 (supplier: Linde Gas, 99.8% by volume) and will be equal to 80% of theoretical valu...

Embodiment 2

[0124] Example 2: Chlorination under nitrogen with addition of oxygen from air using visible light irradiation

[0125] Chlorination

[0126] Set up a reactor for batch operation comprising a four-necked Simax TM Glass flask equipped with stirrer, thermometer, aftercooler, feed and discharge necks, neck for nitrogen introduction, and cooling jacket. The reactor was equipped as in Example 1 with a 400 W high pressure Hg external lamp RVLX400 type mainly producing the visible spectrum. The feedstock consisted of pure 1,1,3-trichloropropene distilled fresh just before the experiment and its quality was analyzed by GC and worked up under nitrogen. Small amounts of HCl gas are formed and these, together with traces of chlorine, are cooled by means of an aftercooler / condenser and then absorbed in a caustic soda scrubber.

[0127] As in Example 1, gaseous chlorine from a cylinder of mass 2.8 (supplier: Linde Gas AG) was introduced into the liquid reaction mixture via a dip tube in...

Embodiment 3

[0135] Example 3: Chlorination under nitrogen using UV irradiation

[0136] Chlorination

[0137] Set up a reactor for batch operation consisting of a four-necked Simax TMComposition of glass flasks equipped with stirrer, thermometer, aftercooler, feed and discharge necks, neck for nitrogen introduction, and cooling jacket. The reactor was equipped with a 125W high pressure Hg internal lamp HPL 125 in a submerged quartz glass tube. The feedstock consisted of pure 1,1,3-trichloropropene distilled fresh just before the experiment and its quality was analyzed by GC and worked up under nitrogen. Small amounts of HCl gas are formed and these, together with traces of chlorine, are cooled by means of an aftercooler / condenser and then absorbed in a caustic soda scrubber. Gaseous chlorine was evaporated from liquid chlorine from a cylinder of mass 2.8 (supplier: Linde Gas AG, 99.8% by volume) and an amount equal to 80% of the theoretical value based on trichloropropene starting mate...

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Abstract

The present invention provides a process for the production of chlorinated alkanes, wherein an alkene or alkane feedstock is contacted with chlorine in a chlorination zone to produce a reaction mixture containing said chlorinated alkanes, wherein said chlorinated alkanes supplied to said chlorinated The chlorine in the zone has an oxygen content of less than about 2000 ppmv and wherein: the chlorination zone is closed to the atmosphere; and / or the chlorination zone is operated at or above atmospheric pressure; and / or The chlorination zone is operated under an inert atmosphere; and / or the dissolved oxygen content of the olefin or alkane feedstock is less than 2000 ppm.

Description

technical field [0001] The present invention relates to a process for producing chlorinated alkane compounds having acceptably low levels of oxygenated impurities. Background technique [0002] Haloalkanes are useful in a variety of applications. For example, halocarbons are widely used as refrigerants, blowing agents, and blowing agents. The use of chlorofluoroalkanes increased exponentially throughout the second half of the twentieth century until the 1980s, when concerns arose about their environmental impact, particularly with regard to the depletion of the ozone layer. [0003] Subsequently, HFCs, such as perfluorocarbons and hydrofluorocarbons, were used instead of chlorofluoroalkanes, although recently, environmental concerns regarding the use of such compounds have been raised and legislation has been enacted in the EU and elsewhere to reduce their use . [0004] New classes of environmentally friendly halocarbons are emerging and have been investigated and, in so...

Claims

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Application Information

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IPC IPC(8): C07C17/04C07C19/01
CPCC07C17/04C07C19/01Y02P20/582C07C17/10C07C17/383C25B1/26C07C17/06C07C17/093C07C17/013
Inventor 兹德涅克·昂德鲁斯帕维尔·库比切克
Owner SPOLCHEMIE ZEBRA AS
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