Simultaneous producting of higher chloromethanes
AssigneeAtochem
InventorsJean-Jacques Masini, Yvan Verot
Life of this patent
Estimating the term…
Abstract
Apparatus for the production of higher chloromethanes, i.e, CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, by chlorinating methyl chloride with chlorine in a first reaction zone A, chlorinating at least one of the higher chloromethanes CH.sub.2 Cl.sub.2 and CHCl.sub.3 with chlorine in a parallel second reaction zone B, combining the reaction products from the first and second reaction zones A and B, separating higher chloromethanes from the combined reaction prodcuts, and recycling at least one of the separated higher chloromethanes CH.sub.2 Cl.sub.2 and CHCl.sub.3 as chlorination feed to the second reaction zone B.
Claims23
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane directly from said separating means to said second reaction means B.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, the apparatus further comprising means for scrubbing effluent from said second reaction means B located upstream of said means for reaction product combination.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2,CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, the apparatus further comprising means for scrubbing effluent from said second reaction means B located upstream of said means for reaction product combination, said scrubbing means including means for gas scrubbing feed to said second reaction means B.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, said means for separation of the reaction product comprising a plurality of downstream means for separation of said combined reaction product, in serially communicating relationship, said first reaction means A including means for feeding methyl chloride thereto and said second reaction means B including means for feeding at least one higher chloromethane thereto, said separation means comprising a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product, the apparatus further comprising means for feeding unreacted CH.sub.3 Cl removed by said second separation unit to said first separation unit for cooling of reaction product in said first separation unit.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, said means for separation of the reaction product comprising a plurality of downstream means for separation of said combined reaction product, in serially communicating relationship, said first reaction means A including means for feeding methyl chloride thereto and said second reaction means B including means for feeding at least one higher chloromethane thereto, said separation means comprising a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product, the apparatus further comprising means for feeding CH.sub.2 Cl.sub.2 removed by said third separation unit to feed to said second reaction means B.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, said means for separation of the reaction product comprising a plurality of downstream means for separation of said combined reaction product, in serially communicating relationship, said first reaction means A including means for feeding methyl chloride thereto and said second reaction means B including means for feeding at least one higher chloromethane thereto, said separation means comprising a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product, the apparatus further comprising means for feeding CHCl.sub.3 removed by said fourth separation unit to feed to said second reaction means B.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B, means for separating higher chloromethanes from combined reaction product, and means for recycling at least one separated higher chloromethane to said second reaction means B, said means for separation of the reaction product comprising a plurality of downstream means for separation of said combined reaction product, in serially communicating relationship, said first reaction means A including means for feeding methyl chloride thereto and said second reaction means B including means for feeding at least one higher chloromethane thereto, said separation means comprising a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product, the apparatus further comprising gas scrubbing means located upstream of said means for reaction product combination, said scrubbing means being in parallel with means feeding effluent from said second reaction means B to said first separation unit.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, said first reaction means A including means for feeding CH.sub.3 Cl thereto and said second reaction means B including means for feeding at least one of CH.sub.2 Cl.sub.2 and CHCl.sub.3 thereto;
- means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B;
- means for separating higher chloromethanes from combined reaction product;
- means for recycling at least one separated higher chloromethane to said second reaction means B;
- said separating means including a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product;
- said second separation unit being located downstream of said first separation unit, said third separation unit being located downstream of said second separation unit and said fourth separation unit being located downstream of said third separation unit;
- means for feeding unreacted CH.sub.3 Cl removed by said second separation unit to said feed to said first reaction means A;
- means for feeding CH.sub.2 Cl.sub.2 removed by said third separation unit to said feed to said second reaction means B;
- and means for feeding CHCl.sub.3 removed by said fourth separation unit to said feed to said second reaction means B.
Apparatus for the simultaneous preparation of the higher chloromethanes CH.sub.2 Cl.sub.2, CHCl.sub.3 and CCl.sub.4, comprising parallel first and second chlorination reaction means A and B, said first reaction means A including means for feeding CH.sub.3 Cl thereto and said second reaction means B including means for feeding at least one of CH.sub.2 Cl.sub.2 and CHCl.sub.3 thereto;
- means for reaction product combination and separation in downstream, discrete communicating relationship with each of said reaction means A and B;
- means for separating higher chloromethanes from combined reaction product;
- means for recycling at least one separated higher chloromethane to said second reaction means B said separating means comprising a first separation unit for removing HCl from the reaction product, a second separation unit for removing CH.sub.3 Cl from the reaction product, a third separation unit for removing CH.sub.2 Cl.sub.2 from the reaction product and a fourth separation unit for removing CHCl.sub.3 from the reaction product;
- said second separation unit being located downstream of said first separation unit, said third separation unit being located downstream of said second separation unit and said fourth separation unit being located downstream of said third separation unit;
- means for feeding unreacted CH.sub.3 Cl removed by said second separation unit to said feed to said first reaction means A;
- means feeding effluent from said second reaction means B to said first separation unit;
- gas scrubbing means in parallel with said means feeding effluent from said second reaction means B to said first separation unit;
- means for feeding effluent from said second reaction means B to said gas scrubbing means;
- means for feeding one or more higher chloromethanes exiting said gas scrubbing means to said feed to said second reaction means B;
- means for feeding at least one of CH.sub.2 Cl.sub.2 and CHCl.sub.3 exiting said third and fourth separation units to said gas scrubbing means;
- and means for feeding effluent from said gas scrubbing means to said first separation unit.
Dependencies are inferred from the claim text.