Abstract 1. A PROCESS FOR PRODUCING METHYLENE CHLORIDE COMPRISING THE STEPS OF: (A) CHLORINATING METHANE AT A TEMPERATURE BETWEEN 200 AND 500*C., THE MOLAR RATIO OF CHLORINE TO METHANE TO BE CHLORINATED BEING BETWEEN 0.2 AND 0.4; (B) PARTIALLY CONDENSING THE PRODUCTS OF STEP (A) AT A TEMPERATURE BETWEEN -15 AND 50*C. AND PRESSURE OF UP TO 15 ATMOSPHERES TO FORM A GAS PHASE CONTAINING METHANE, HYDROGEN CHLORIDE AND A MINOR PORPORTION OF CHLORINATED METHANES AND LIQUID PHASE COMPRISING CHLORINATED METHANES AND HYDROGEN CHLORIDE; (C) ABSORBING HYDROGEN CHLORIDE FROM SAID GAS PHASE OBTAINED IN STEP (B) BY WASHING AT A TEMPERATURE BETWEEN -10 AND -50*C. AND A PRESSURE OF UP TO 15 ATMOSPHERES WITH A LIQUID MIXTURE OF CHLORINATED METHANES IN A PROPORTION OF 3 TO 6 MOLES OF CHLORINATED METHANE PER MOLE OF HYDROGEN CHLORIDE PRESENT IN THE PRODUCTS OF CHLORINATING STEP (A) TO GIVE A LIQUID PHASE ENRICHED IN HYDROGEN CHLORIDE AND A GAS PHASE CONTAINING METHANE; (D) RECYCLING SAID GAS PHASE FROM STEP (C) TO CHLORINATING STEP (A); (E) COMBINING SAID LIQUID PHASE FROM STEP (B) WITH SAID LIQUID PHASE RESULTING FROM STEP (C) TO GIVE A LIQUID MIXTURE; (F) SEPARATING THE LIQUID MIXTURE FROM STEP (E) IN A HYDROGEN CHLORIDE DISTILLATION COLUMN TO GIVE DRY GASEOUS HYDROGEN CHLORIDE AS AN OVERHEAD FRACTION AND A LIQUID MIXTURE OF CHLORINATED METHANES AS A BOTTOM FRACTION; (G) USING PART OF SAID LIQUID BOTTOM FRACTION FROM STEP (F) AS THE LIQUID MIXTURE OF CHLORINATED METHANES IN ABSORBING STEP (C); (H) DISTILLING THE OTHER PART OF SAID LIQUID BOTTOM FRACTION FROM STEP (F) TO SEPARATE A LIQUID MIXTURE OF CHLORINATED METHANES COMPRISING METHYLENE CHLORIDES, CHLOROFORM AND TETRACHLOROMETHANE AS A BOTTOM FRACTION AND TO SEPARATE THE METHYL CHLORIDE AS AN OVERHEAD FRACTION; AND (I) DISTILLING SAID LIQUID MIXTURE FROM STEP (H) TO RECOVER METHYLENE CHLORIDE THEREFROM.
Inventors
👤 L Forlano
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-05 09:05
CPC Classifications
C; C07; C07C; C07C19/00; C07C19/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
225 words
A PROCESS FOR PRODUCING METHYLENE CHLORIDE COMPRISING THE STEPS OF: (A) CHLORINATING METHANE AT A TEMPERATURE BETWEEN 200 AND 500*C., THE MOLAR RATIO OF CHLORINE TO METHANE TO BE CHLORINATED BEING BETWEEN 0.2 AND 0.4; (B) PARTIALLY CONDENSING THE PRODUCTS OF STEP (A) AT A TEMPERATURE BETWEEN -15 AND 50*C. AND PRESSURE OF UP TO 15 ATMOSPHERES TO FORM A GAS PHASE CONTAINING METHANE, HYDROGEN CHLORIDE AND A MINOR PORPORTION OF CHLORINATED METHANES AND LIQUID PHASE COMPRISING CHLORINATED METHANES AND HYDROGEN CHLORIDE; (C) ABSORBING HYDROGEN CHLORIDE FROM SAID GAS PHASE OBTAINED IN STEP (B) BY WASHING AT A TEMPERATURE BETWEEN -10 AND -50*C. AND A PRESSURE OF UP TO 15 ATMOSPHERES WITH A LIQUID MIXTURE OF CHLORINATED METHANES IN A PROPORTION OF 3 TO 6 MOLES OF CHLORINATED METHANE PER MOLE OF HYDROGEN CHLORIDE PRESENT IN THE PRODUCTS OF CHLORINATING STEP (A) TO GIVE A LIQUID PHASE ENRICHED IN HYDROGEN CHLORIDE AND A GAS PHASE CONTAINING METHANE; (D) RECYCLING SAID GAS PHASE FROM STEP (C) TO CHLORINATING STEP (A); (E) COMBINING SAID LIQUID PHASE FROM STEP (B) WITH SAID LIQUID PHASE RESULTING FROM STEP (C) TO GIVE A LIQUID MIXTURE; (F) SEPARATING THE LIQUID MIXTURE FROM STEP (E) IN A HYDROGEN CHLORIDE DISTILLATION COLUMN TO GIVE DRY GASEOUS HYDROGEN CHLORIDE AS AN OVERHEAD FRACTION AND A LIQUID MIXTURE OF CHLORINATED METHANES AS A BOTTOM FRACTION;
Claim 2
Dependent Claim
225 words
A PROCESS FOR PRODUCING METHYLENE CHLORIDE COMPRISING THE STEPS OF: (A) CHLORINATING METHANE AT A TEMPERATURE BETWEEN 200 AND 500*C., THE MOLAR RATIO OF CHLORINE TO METHANE TO BE CHLORINATED BEING BETWEEN 0.2 AND 0.4; (B) PARTIALLY CONDENSING THE PRODUCTS OF STEP (A) AT A TEMPERATURE BETWEEN -15 AND 50*C. AND PRESSURE OF UP TO 15 ATMOSPHERES TO FORM A GAS PHASE CONTAINING METHANE, HYDROGEN CHLORIDE AND A MINOR PORPORTION OF CHLORINATED METHANES AND LIQUID PHASE COMPRISING CHLORINATED METHANES AND HYDROGEN CHLORIDE; (C) ABSORBING HYDROGEN CHLORIDE FROM SAID GAS PHASE OBTAINED IN STEP (B) BY WASHING AT A TEMPERATURE BETWEEN -10 AND -50*C. AND A PRESSURE OF UP TO 15 ATMOSPHERES WITH A LIQUID MIXTURE OF CHLORINATED METHANES IN A PROPORTION OF 3 TO 6 MOLES OF CHLORINATED METHANE PER MOLE OF HYDROGEN CHLORIDE PRESENT IN THE PRODUCTS OF CHLORINATING STEP (A) TO GIVE A LIQUID PHASE ENRICHED IN HYDROGEN CHLORIDE AND A GAS PHASE CONTAINING METHANE; (D) RECYCLING SAID GAS PHASE FROM STEP (C) TO CHLORINATING STEP (A); (E) COMBINING SAID LIQUID PHASE FROM STEP (B) WITH SAID LIQUID PHASE RESULTING FROM STEP (C) TO GIVE A LIQUID MIXTURE; (F) SEPARATING THE LIQUID MIXTURE FROM STEP (E) IN A HYDROGEN CHLORIDE DISTILLATION COLUMN TO GIVE DRY GASEOUS HYDROGEN CHLORIDE AS AN OVERHEAD FRACTION AND A LIQUID MIXTURE OF CHLORINATED METHANES AS A BOTTOM FRACTION;