- Process for coproducing trans - HFO-1234 ze and cis - HFO-1234 ze
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The invention relates to a vinyl chloride (CH). 2 = CHCl) And carbon tetrachloride (CCl)4 For the production of trans HFO-1234 ze and cis HFO-1234 ze from the starting materials. Vinyl chloride (CH)2 = CHCl) And carbon tetrachloride (CCl)4 In a catalytic system composed of a chlorinated metal salt/molecular sieve catalyst and N and N - dimethylethylamine, HCC-240 fa is synthesized by telomerization and is subjected to a fluorination reaction in HCC reactor, 240 is alumina in a second reactor, and contains θ-Al and 3rd. 2 O3 Sum α-Al2 O3 The trans - HFO-1234 ze is converted into cis - HFO-1234 ze under the action of the isomerization catalyst of the mixed crystal phase, and finally, trans HFO-1234 ze is obtained through multistage separation tower and extraction separation. Cis HFO-1234 ze product.
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Paragraph 0067-0070; 0073-0075; 0077-0079; 0086-0088; ...
(2021/10/27)
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- IMPROVED PROCESSES FOR PREPARING HALOGENATED ALKANES
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The present invention provides improved processes for preparing halogenated alkanes. The processes comprise reacting an alkene, a halogenated alkene, or combinations thereof and a halogenated methane with at least one chlorine atom, while using an absorption device.
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Paragraph 0104
(2019/10/29)
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- Preparation method of 2,3,3,3-tetrafluoropropene
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The invention discloses a preparation method of 2,3,3,3-tetrafluoropropene. The preparation method comprises the steps: performing telomerization on chloroethylene and CCl4 so as to produce 1,1,1,3,3-pentachloropropane, then performing dehydrochlorination so as to generate 1,1,3,3-tetrachloro-1-propylene, performing exchange of fluorine and chlorine and dehydrochlorination so as to prepare 3,3,3-trifluoro-1-chloropropene, then performing an isomerization reaction so as to obtain 3,3,3-trifluoro-2-chloropropene, performing a liquid phase fluorination reaction so as to synthesize 1,1,1,2-tetrafluoro-2-chloropropane, and finally performing dehydrochlorination so as to obtain 2,3,3,3-tetrafluoropropene. The raw materials have low price, and are easy to obtain, so that the raw material cost inthe production process of 2,3,3,3-tetrafluoropropene is reduced; an industrial chain is formed in the reaction process, and highly-economic values are provided through purification of the intermediateproducts; the reaction conditions are mild, the equipment has simple operation, the raw material conversion rate and product selectivity are high at the reaction stages, and by-products are few, so that a large industrial application prospect is achieved.
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Paragraph 0030-0032; 0044-0046; 0058-0060; 0072-0074
(2019/04/26)
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- METHOD FOR PRODUCTION OF A HALOGENATED ALKANE USING AN ABSORBER-REACTOR COMBINATION
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The present invention provides improved processes for preparing halogenated alkanes. The processes comprise contacting at least one alkene, a halogenated alkene, or combinations thereof with a halogenated methane with at least one chlorine atom to form a liquid phase. This liquid phase is then contacted with at least one catalytic species which initiates the reaction with at least one alkene, a halogenated alkene, or combinations thereof with a halogenated methane with at least one chlorine atoms.
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Paragraph 0107
(2019/10/29)
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- METHOD FOR PRODUCING FLUOROCARBON USING HYDROHALOFLUOROPROPENE
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PROBLEM TO BE SOLVED: To provide a method for selectively producing fluorocarbon by efficiently isomerizing a hydrofluoropropene isomer (isomer 1) under the reduction of catalytic performance to produce a corresponding hydrohalofluoropropene isomer (isomer 2) and using the same. SOLUTION: Provided is a method for producing 3,3,3-trifluoropropene by contacting a 1-halogeno-3,3,3-trifluoropropene isomer with a moisture concentration of 100 ppm or lower (isomer 1) in a vapor phase so as to be isomerized to produce a corresponding 1-halogeno-3,3,3-trifluoropropene isomer (isomer 2), and subjecting the 1-halogeno-3,3,3-trifluoropropene isomer (isomer 2) to dehalogenation. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT
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Paragraph 0327; 0328; 0329; 0330; 0344; 0345; 0346; 0352
(2018/07/31)
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- PROCESS FOR PRODUCING C3 CHLORINATED ALKANE AND ALKENE COMPOUNDS
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A process for producing a reaction mixture comprising a plurality of C3 chlorinated alkane isomers comprising chlorinating a C3 chlorinated alkane starting material in a chlorination zone to produce the plurality of C3 chlorinated alkane isomers, the plurality of C3 chlorinated alkane isomers each having at least one more chlorine atom than the C3 chlorinated alkane starting material, wherein the concentration of the C3 chlorinated alkane starting material is controlled such that conversion of the C3 chlorinated alkane starting material to the plurality of C3 chlorinated alkane isomers, represented by the molar ratio of the C3 chlorinated alkane starting material : C3 chlorinated alkane isomers in the reaction mixture present in the chlorination zone, does not exceed about 40:60.
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Page/Page column 75; 76; 77
(2017/03/14)
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- Continuous preparation method of chlorohydrocarbons
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The invention discloses a continuous preparation method of chlorohydrocarbons. The preparation method comprises the following steps: (a) continuously introducing carbon tetrachloride, C2 olefins, a catalyst and a catalyst adjuvant into a reaction kettle to react, thereby obtaining a reaction product; (b) continuously introducing the reaction product obtained in the step (a) into a first rectification tower, obtaining the unreacted carbon tetrachloride and C2 olefins from the tower top, circulating the unreacted carbon tetrachloride and C2 olefins into the reaction kettle, and obtaining a tower bottom solution on the tower bottom; (c) continuously introducing the tower bottom solution obtained in the step (b) into a second rectification tower, rectifying to obtain the catalyst adjuvant and a component containing chlorohydrocarbon products, and circulating the catalyst adjuvant back into the reaction kettle; and (d) continuously introducing the component containing chlorohydrocarbon products obtained in the step (c) into a third rectification tower, and rectifying to obtain the chlorohydrocarbon products. The method has the advantages of simple technique, low cost, high reaction efficiency, high safety and environment friendliness.
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Paragraph 0031; 0032
(2017/03/14)
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- Method for preparing 1,1,1,3,3-pentachloropropane
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The invention discloses a method for preparing 1,1,1,3,3-pentachloropropane. The method comprises the following steps: (1) mixing carbon tetrachloride, chloroethylene and a catalyst, and continuously introducing the mixture into a reactor for reacting to obtain a mixture which contains the 1,1,1,3,3-pentachloropropane and incompletely-reacted carbon tetrachloride; (2) continuously introducing the mixture containing the 1,1,1,3,3-pentachloropropane and the incompletely-unreacted carbon tetrachloride into a first rectifying tower for rectifying to obtain the incompletely-unreacted carbon tetrachloride on the tower top, and circulating the incompletely-unreacted carbon tetrachloride into the reactor to obtain a mixture containing the 1,1,1,3,3-pentachloropropane at the tower bottom; (3) separating the tower bottom mixture obtained in the step (2) to obtain an inorganic salt and a product containing the 1,1,1,3,3-pentachloropropane; (4) continuously introducing the product containing the 1,1,1,3,3-pentachloropropane obtained in the step (3) into a second rectifying tower for rectifying to obtain a 1,1,1,3,3-pentachloropropane product. The method has the advantages of simple process, low energy consumption, high reaction efficiency, safety, environmental friendliness and continuous operation.
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Paragraph 0051-0052
(2017/05/27)
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- Process For Producing Chlorinated Hydrocarbons In The Presence Of A Polyvalent Bismuth Compound
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The preparation of chlorinated hydrocarbons by reacting a chlorinated alkane substrate, such as 1,1,1,3-tetrachloropropane, with a source of chlorine, such as chlorine (Cl2), in the presence of a polyvalent bismuth compound, such as triphenyl bismuth and/or triphenyl bismuth dichloride, is described. With the method of the present invention, the chlorinated alkane product has covalently bonded thereto at least one more chlorine group than the chlorinated alkane substrate, and the chlorinated alkane substrate and the chlorinated alkane product each have a carbon backbone structure that is in each case the same.
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Paragraph 0069-0070
(2015/04/28)
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- PRODUCTION METHOD FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE
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A production method of 1-chloro-3,3,3-trifluoropropene according to the present invention includes reaction of 1,1,1,3,3-pentachloropropane with hydrogen fluoride, characterized in that the concentrations of respective catalytic components in the 1,1,1,3,3-pentachloropropane as the raw material is controlled to a predetermined level or less. By controlling the concentrations of the respective catalytic components in the 1,1,1,3,3-pentachloropropane to the predetermined level or less, it is possible to improve the problems of shortening of catalyst life, retardation of reaction and scaling or corrosion of equipment in the production of the 1-chloro-3,3,3-trifluoropropene. In addition, the 1,1,1,3,3-pentachloropropane can be obtained selectively with high yield by telomerization reaction of carbon tetrachloride and vinyl chloride. The present invention is thus useful as the method for industrially advantageous, high-yield production of the 1-chloro-3,3,3-trifluoropropene.
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Paragraph 0066; 0067; 0068; 0069
(2014/11/13)
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- PROCESS FOR 1,3,3,3-TETRAFLUOROPROPENE
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The present invention provides a simple three step process for the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze). In the first step, carbon tetrachloride is added to vinyl fluoride to afford the compound CCl3CH2CHClF (HCFC-241fb). HCFC-241fb is then fluorinated with anhydrous HF to afford CF3CH2CHClF (HCFC-244fa) in the second step. Dehydrochlorination of HCFC-244fa, in the third step, affords the desired product, CF3CH═CHF (HFO-1234ze). Following similar chemistry, vinyl chloride may be used in place of vinyl fluoride.
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Paragraph 0032
(2013/08/28)
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- PROCESS OF MAKING A CHLORINATED HYDROCARBON
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A process of making a chlorinated hydrocarbon through a thermal dehydrochlorination step in which an unsaturated compound represented by the following general formula (2) is obtained by thermally decomposing a saturated compound represented by the following general formula (1). [in-line-formulae]CCl3—CCl2-mHm—CCl3-nHn??(1)[/in-line-formulae] [in-line-formulae]CCl2═CCl2-mHm-1—CCl3-nHn??(2)[/in-line-formulae] (in the above formulas, m is 1 or 2, and n is an integer of 0 to 3.)
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Page/Page column 8-9
(2012/03/12)
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- METHOD FOR AVOIDING THE GENERATION OF BY-PRODUCTS DURING THE PRODUCTION OF HALOALKANE COMPOUNDS
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Disclosed is a process for the manufacture of haloalkane compounds, and more particularly, to an improved process for the manufacture of the compound 1,1,1,3,3-pentachloropropane (HCC-240fa), which mitigates the formation of by-products. The present invention is also useful in the manufacture of other haloalkane compounds such as HCC-250 and HCC-360. One embodiment of the process comprises a method and system for avoiding the formation of polyvinyl chloride during the production of HCC-240fa from CC14, in which vinyl chloride (VCM) is fed into a reactor as a vapor instead of as a liquid, using a diffusing device to further increase the contact surface between VCM vapor and CC14.
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Page/Page column 3
(2012/12/14)
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- METHOD FOR MITIGATING THE FORMATION OF BY-PRODUCTS DURING THE PRODUCTION OF HALOALKANE COMPOUNDS
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Disclosed is a process for the manufacture of haloalkane compounds, and more particularly, an improved process for the manufacture of the compound 1,1,1,3,3-penta-chloropropane (HCC-240fa), which mitigates the formation of by-products from vinyl chloride (CH2═CHCl). The present invention is also useful in the manufacture of other haloalkane compounds such as HCC-250 and HCC-360. One embodiment of the invention comprises a method for mitigating 1,1,3,3,5,5-hexachloropentane and 1,1,1,3,5,5-hexachloropentane formation in the HCC-240fa manufacturing process, in which FeCl3, is introduced to a reactor only after the start-up phase has ended and a continuous operation has started. In a preferred embodiment, “pre-chelated” FeCl3, which is concentrated in a catalyst recovery column, is introduced to reactor after the continuous operation has started.
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Page/Page column 3
(2012/12/14)
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- PROCESS FOR THE MANUFACTURE OF 1,1,1,3,3-PENTACHLOROPROPANE
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A process for the manufacture of haloalkanes, or more particularly to a process for the manufacture of 1,1,1,3,3-pentachloropropane (HCC-240fa) and/or and/or 1,1,1,3-tetrachloropropane (HCC-250fb). The process includes (a) mixing a catalyst, co-catalyst and a haloalkane starting material under conditions suitable to produce a homogeneous mixture; (b) reacting the homogeneous mixture with a haloalkene and/or alkene starting material under conditions suitable to produce a haloalkane product stream; and (c) recovering a haloalkane product from said product stream.
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Page/Page column 4
(2008/06/13)
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- Processes for synthesis of 1,3,3,3-tetrafluoropropene
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Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene that comprises, in one preferred embodiment, providing a compound of the formula CF3CH2CHFX, wherein X is a selected from the group consisting of chlorine, bromine and iodine, and exposing said compound to reaction conditions effective to convert said compound to 1,3,3,3-tetrafluoropropene. Other processes for forming 1,3,3,3-tetrafluoropropene are also disclosed.
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Page/Page column 2; 4
(2008/06/13)
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- Process for the preparation of 1.1.1.3.3-pentafluoropropane
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1,1,1,3,3-pentafluoropropane is produced by reaction between 1,1,1,3,3-pentachloropropane and hydrogen fluoride in the presence of a hydrofluorination catalyst. The 1,1,1,3,3-pentachloropropane may advantageously be obtained by reaction between vinyl chloride and tetrachloromethane in the presence of a telomerization catalyst and of a nitrile.
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- 1,1,1,3,3-pentachloropropane process purge stream concentration using a secondary refluxed evaporator and secondary product recovery
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A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.
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Page/Page column 7
(2008/06/13)
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