ChemicalBook CAS DataBase List Bromoform

Bromoform synthesis

12synthesis methods

Product Name:Bromoform
CAS Number:75-25-2
Molecular formula:CHBr3
Molecular Weight:252.73

Bromoform can be prepared by reacting chloroform (see IAC, 1987) with aluminium tribromide at less th an or equal to 60°C; by reacting ethanol with sodium hypobromite; or by the redistribution reaction between chloroform and ethyl bromide (Harlow & Ross, 1932; Soroos & Hinkamp, 1945; Sherman & Kavasmaneck, 1980).

34557-54-5
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74-83-9
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75-25-2
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74-95-3 Synthesis

74-95-3
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Yield:-

Reaction Conditions:

with bromine at 510; under 22502.3 Torr;Gas phase;Industry scale;

Steps:

1

EXAMPLE 1Referring to Figure 1, the flow rate in methane feed line 1 to the bromination reactor 100 is 100 kg/hr, the flow rate in methane recycle line 2 is 73 kg/hr and the flow rate in the bromine feed line 3 is 1164 kg/hr. Reactor 100 is operated at 510⁰C and300OkPa. The conversion of methane is 50% and the selectivity to monobromomethane is 67%.Reproportionation reactor 120 is also operated at 510⁰C and 300OkPa. The conversion is 43% and the selectivity to monobromomethane is 100%. Coupling reactor 140 is operated at 425°C and 250OkPa. The conversion of the monobromomethane is 100% and the selectivity to BTX is 32%.Bromine generation reactor 110 is operated at 375°C and 20OkPa and the flow rate of air through feed line 36 is 554 kg/hr. The conversion and selectivity are both 100%. The flow rate in water stream 39 is 131 kg/hr. Steam cracker 270 is operated at 840⁰C and 10OkPa. The conversion of the monobromomethane is 84% and the selectivity to lower olefins is 60%.14 kg/hr of benzene and 23 kg/hr of p-xylene are produced. 25 kg/hr of ethylene and 12 kg/hr of propylene are produced.

References:

WO2010/42440,2010,A1 Location in patent:Page/Page column 20

558-13-4 Synthesis