10436-39-2Relevant articles and documents
PROCESSES FOR PREPARING PENTACHLOROPROPANE AND TETRACHLOROPROPENE FROM DICHLOROPROPENE
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Paragraph 0092, (2022/04/03)
A processes for preparing 1,1,2,3-tetrachloropropene, 2,3,3,3-tetrachloropropene, or a mixture thereof from 1,3-dichloropropene. The process may include a two successive chlorination and dehydrochlorination reactions. In a first chlorination reaction 1,3-dichloropropene is reacted with a chlorination agent to form a first chlorination reaction product including 1,1,2,3-tetrachloropropane. This first chlorination reaction product is reacted with a dehydrochlorination reagent in a first dehydrochlorination reaction to form a first dehydrochlorination reaction product including a trichloropropene. The trichloropropene containing reaction product is reacted with a chlorination agent in a second chlorination reaction to form a second chlorination reaction product including at least one of 1,1,1,2,3-pentachloropropane or 1,1,2,2,3-pentachloropropane. This reaction product is reacted with a dehydrochlorination reagent in a second dehydrochlorination reaction to form a second dehydrochlorination reaction product having 1,1,2,3-tetrachloropropene or a 2,3,3,3-tetrachloropropene.
GALLIUM CATALYZED DEHYDROCHLORINATION OF A CHLORINATED ALKANE
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Paragraph 0066, (2020/03/15)
The present invention provides processes for the preparation of a chlorinated alkene from a chloroalkane starting material, at least one Lewis acid catalyst comprising at least one of gallium metal, a salt of gallium, a gallium alloy, or combinations thereof, and optionally a solvent.
METHOD FOR PRODUCING 2-CHLORO-3,3,3-TRIFLUOROPROPENE
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Paragraph 0027, (2019/02/13)
The invention relates to a method for producing 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) from at least one compound A selected from the group consisting of halopropane of formulae CX3CHClCH2X or CX3CFClCH3, or halopropenes of formula CQX2CCNCH2 and CX2═CClCH2X where X independently represents a fluorine or chlorine atom, characterised in that it comprises bringing said at least one compound A into contact with HF in a gaseous phase in the presence of a fluorination catalyst AlF3 or fluorine-bearing alumina in order to form a gaseous flow B comprising 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf) et 3,3,3-trifluoropropene (HFO-1243zf).
Gas phase preparation method of 1,1,2,3-tetrachloropropene
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Paragraph 0029-0043, (2019/01/23)
The invention discloses a gas phase preparation method of 1,1,2,3-tetrachloropropene. Under the effect of a catalyst, 1,1,1,2,3-pentachloropropane is subjected to a gas-phase catalytic dehydrochlorination reaction, the reaction temperature is 150-250 DEG C, the contact time is 1-15 seconds, and a reaction product is collected and subjected to decompression rectification to obtain the 1,1,2,3-tetrachloropropene product. The method has the advantages that the process is simple, the catalyst is good in activity and long in service life, and the method is environmentally friendly and easy to industrialize.
Preparation method of 1,1,2,3-tetrachloropropene
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Paragraph 0034; 0039; 0044; 0049; 0054; 0059, (2017/11/04)
The invention discloses a preparation method of 1,1,2,3-tetrachloropropene. The method comprises the steps of (1) reacting trichloromethane, 1,2-dichloroethylene and a first catalyst, cooling to room temperature after reaction is completed, adding water, carrying out vacuum rectification to obtain 1,1,2,3,3-pentachloropropane; (2) carrying out gas-phase catalytic dehydrochlorination reaction on the 1,1,2,3,3-pentachloropropane under the action of a second catalyst to obtain 1,2,3,3-tetrachloropropene; (3) carrying out gas-phase catalytic addition reaction on hydrogen chloride and the 1,2,3,3-tetrachloropropene under the action of a third catalyst to obtain 1,1,2,2,3-pentachloropropane; and (4) carrying out gas-phase catalytic dehydrochlorination reaction on the 1,1,2,2,3-pentachloropropane under the action of a fourth catalyst, collecting a reaction product and carrying out vacuum rectification to obtain the 1,1,2,3-tetrachloropropene. The preparation method is simple in process, available in raw materials, low in cost, high in yield, green and environment-friendly and is especially suitable for industrial production.
Compositions comprising 2,3,3,3-tetrafluoropropene, 1,1,2,3-tetra-chloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane
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Page/Page column 5, (2016/05/09)
The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.
A 1, 1, 2, 3-tetrachloro acrylic synthetic method
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Paragraph 0028-0029, (2017/03/28)
The invention discloses a 1,1,2,3-tetrachloropropene synthesis method. The method comprises that a catalyst and a solvent acetonitrile are added into a pressure reactor according to a mass ratio of 1: 15-1: 25 in a nitrogen protective atmosphere, the mixture is continuously stirred for 1-2h, tetrachloroethylene and dichloromethane are added into the reactor, the mixture is heated to a temperature of 120-130 DEG C, is continuously stirred for 14-16h in a nitrogen protective atmosphere and is subjected to reduced pressure distillation to form 1,1,1,2,2,3-hexachloropropane, the 1,1,1,2,2,3-hexachloropropane, zinc powder activated by hydrochloric acid and dioxan are added into an enclosed container, the materials are stirred at a temperature of 45 DEG C in a nitrogen protective atmosphere for 48-50h, the mixture is subjected to reduced pressure distillation, and the fraction at a temperature of 102-104 DEG C under pressure of 13.33kPa is collected and is 1,1,2,3-tetrachloropropene. The 1,1,2,3-tetrachloropropene synthesis method has simple reaction processes and post-treatment processes, has a high synthesis yield and has a low raw material cost.
A METHOD TO PRODUCE 1,1,2,3-TETRACHLOROPROPENE WITH HIGH YIELD
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Page/Page column 3; 6; 10, (2015/11/18)
The present invention provides a method for the high yield production of HCC-1230xa from the known four step method, wherein the Step 3 crude product (crude HCC-240db) is used directly as the starting material in the Step 4 reaction - but only if the crude HCC-240db contains less than 0.5 wt% of impurities selected from the group consisting of HCC-250fb, HCC-1240za, and mixtures thereof.
PROCESS FOR THE PRODUCTION OF CHLORINATED PROPENES
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Paragraph 0067-0068, (2014/09/16)
Processes for the production of chlorinated propenes are provided. The processes proceed through the production of cyclic intermediate that is thereafter readily converted to a desired chloropropane, e.g., via selective pyrolysis. The process may be conducted using starting materials that are readily commercially available and/or that may be reacted safely in standard laboratory equipment so that capital cost savings may be seen. The process does not require the use of catalysts and yet, process conditions less extreme than many conventional processes for the production of chlorinated propenes are suitable, so that raw material and utility cost savings are also possible.
Process For Producing Chlorinated Hydrocarbons
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Paragraph 0183; 0184, (2014/08/06)
The preparation of chlorinated hydrocarbons, such as pentachloropropanes, such as 1,1,1,2,3-pentachloropropane, from tetrachloropropanes, such as 1,1,1,3-tetrachloropropane, in the presence of a polyvalent antimony compound that includes a pentavalent antimony compound, such as antimony pentachloride, is described. Also described are methods for preparing optionally chlorinated alkenes, such as, tetrachloropropenes, from chlorinated alkanes, such as pentachloropropanes, in the presence of ferric chloride and a polyvalent antimony compound that includes a pentavalent antimony compound.
