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Chlorinated Methanes
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- The chlorination of methane
proceeds through a radical mechanism. Like most radical mechanisms there
are three steps: initiation, propagation and termination.
- The chlorination of methane
does not necessarily stop after one chlorination. It may actually be
very hard to get a monosubstituted chloromethane. Instead di-, tri- and
even tetra-chloromethanes are
formed.
- Methylene dichloride ,
chloroform , and carbon tetrachloride are three basic products of
methane chlorination and are produced by high temperature gas phase
chlorination of methane or methyl chloride.
- Chloroform is also known as
trichloromethane or methyltrichloride. It is a colorless liquid with a
pleasant, nonirritating odor and a slightly sweet taste. Most of the
chloroform found in the
environment comes from industry.
- Chloromethane is used almost
entirely as a chemical intermediate to make other chloromethanes,
silicone intermediates, pesticides, quaternary amines and surfactants,
and as a methylation reactant
for various other processes. It is
also used as a solvent for production of butyl rubber.
- Methane chlorination
reactions proceed by a multi-step series of exothermic reactions which
are stabilized in a con ned jet con guration where reactants are
typically introduced at temperatures well
below the minimum
activation temperature.
- The Conventional method of
producing chlorinated methanes involves the reaction of methane with
chlorine gas. For each substitution of a chlorine atom into the methane
molecule, one molecule of
hydrogen chloride is produced.
- Chloromethane (CH3CI),
dichloromethane (CH2C12), tricloromethane (CHC13), and
tetrachloromethane (CC14) are produced on a scale of approximately 2
million tons per year and used as intermediates in chemical synthesis
and as industrial solvents.
- Chloromethanes can be
divided into two categories; either the lower- or higher chlorinated
methanes, based on the distinct behaviour patterns in their
biodegradability.
- Demand for methylene
chloride on the export market had been steadily increasing since
January, producers said, which had pushed prices to levels some had not
previously expected.
- Globally, about 90-95% of
the chloroform is used as a precursor for HCFC-22, which is used in
refrigerants and fluoropolymers such as polytetrafluoro-ethylene (PTFE).
- Carbon tetrachloride is used
as a chemical intermediate and as a feedstock in the production of
chlorofluorocarbons, such as the Freons dichlorodifluoromethane and
trichlorofluromethane , which are used primarily as refrigerants.
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Introduction
- Free Radical
Halogenation
- Methane
Msds
- Chloroform
- Chloroform -
Technical
- Methylene chloride
- Carbon Tetrachloride
- Methylene Chloride -
Msds
- Chloromethane
- Methylene Chloride FOQM
grade
Products
- Chloroform
- Methyl Chloride
- Methylene Chloride
- Carbon Tetrachloride
Production
Process
- Carbon tetrachloride -
Production
- Chlorination of Methane and
the Radical Chain Mechanism
- Chloroform -
Production
- Chloromethane -
Production
- Energetics of
Reactions
- Explaining the Reaction
between Methane and Chlorine
- Modeling turbulent reacting
methane thermochlorination flows
- Methyl Chloride Via
Oxyhydrochlorination of Methane
- Methyl Chloride Production
from Methane over Lanthanum-Based Catalysts
Patents
- Process for separating
Chlorinated Methanes
- Process for the chlorination
of methane
- Liquid phase chlorination of
chlorinated methanes
- Chlorination of
hydrocarbons
- Process for the addition of
a chlorinated methane containing at least three chlorine atoms to an
ethylenically unsaturated hydrocarbon
- Production of commodity
chemicals from natural gas by methane chlorination
- Separating the chlorination
products from the reaction gases obtained by the chlorination of methane
and methyl chloride
- Recovery of chlorinated
methanes
Suppliers
- Carbon Tetrachloride
Suppliers
- Chloroform Suppliers
- Methyl chloride
Suppliers
- Methylene Chloride
Suppliers
- Suppliers of Carbon
tetrachloride
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Study
- Bacterial Growth with
Chlorinated Methanes
- Biodegradation of
Chlorinated Methane
- Carcinogenicity of
Chlorinated Methane and Ethane Compounds Administered in Drinking Water
to Mice
- Investigation of
Chlorinated Methanes treatablilty using activated sodium
persulfate
- Reductive dechlorination of
chlorinated methanes in cement slurries containing Fe(II).
- Tranformation of
Chlorinated Methanes by Nanoscale iron particles
Market
- Europe methylene chloride
spot rises $50/t on surging demand
- Methane chlorides capacity
increases rapidly
- A Global Strategic Business
Report - Market Consultant
- Methylene chloride:
Advantages and Drawbacks of Possible Market Restrictions in the
EU
- Chlorinated Methanes
Company
Profiles
- Company from China
- Company from Delhi
- Company from Gujarat
- Company from Kanpur
- Company from
Maharashtra
- Another Company from
Maharashtra
- Company from Noida
Consultants
- Consultant from
Altanta
- Consultant from Delhi
- Carbon Tetrachloride
Experts
- Chloroform Experts
- Methylene Chloride
Experts
Reports
- Biodegradability of
chlorinated solvents and related chlorinated aliphatic compounds
- Chloromethane - Assessment
Report
- Current Trends, Mixing
Ratios, and Emissions of Ozone-Depleting Substances and Their
Substitutes
- Carbon Tetrachloride -
Report
- Responses to Major Comments
on Technical Support Document
- Toxicological Profile -
Chloroform
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