直鎖プロピルブロミドの製造及び精製法

Japanese Patent JP4942737

B2

Purification processes for separating n-propyl bromide from a crude reaction mixture comprising n-propyl bromide and isopropyl bromide which process comprises: (I) washing at least a portion of the crude reaction mixture one or more times with a wash comprising an aqueous solution or aqueous suspension of at least one alkali metal hydroxide having a molar concentration in the range of 3 to 5 moles per liter, to form an aqueous phase and an organic phase, and then separating the phases thus formed; (II) optionally, washing at least a portion of the organic phase from (I) with water to form an aqueous phase and an organic phase and then separating the phases thus formed; (III) either (A) when (I) is conducted and (II) is not conducted, distilling at least a portion of the organic phase from (I) one or more times; or (B) when (I) and (II) are conducted, distilling at least a portion of the organic phase from (II) one or more times; and (IV) forming a propyl bromide product mixture wherein the propyl bromide product mixture is comprised of at least 99.7 GC area % n-propyl bromide and no more than 0.05 GC area % isopropyl bromide. Also provided is a composition of enhanced thermal stability which comprises a mixture of n-propyl bromide and isopropyl bromide. The mixture has an n-propyl bromide content of at least 99.7 GC area %, and an isopropyl bromide content of no more than 0.05 GC area %. The mixture, if subjected to storage in a closed chemically inert container at 60°C for at least 480 hours, has an APHA color of 10 or less while the mixture is devoid of any added stabilizer component.

Harold, William Bee
Bonnie Gee
Dalgar, Ali Reza M
Hall, Tyson Theei

JP2008506670A

May 30, 2012

April 13, 2006

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Albemarle Corporation

C07C17/08; C07C17/383; C07C19/075

JPS3612267B1

Patent business corporation Odashima patent office

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