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US5649322: Process for the preparation of C.sub.1 -C.sub.4 -alkyl nitrites

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Filing Information

Inventor(s) Heinz Landscheidt · Paul Wagner · Zoltan Kricsfalussy · Alexander Klausener ·
Assignee(s) Bayer Aktiengesellschaft ·
Attorney/Agent(s) Sprung Horn Kramer & Woods ·
Primary Examiner Sharon Gibson ·
Assistant Examiner Valerie Fee ·
Application Number US8571625
Filing date 12/11/1995
Issue date 07/15/1997
Predicted expiration date 03/01/2014
U.S. Classifications 558/488  ·
International Classifications C07C20302  ·
Kind CodeA
International Classifications 558488 ·
Related U.S. Application DataThis application is a continuation of application Ser. No. 08/203,975, filed Mar. 1, 1994 now abandoned.
Foreign Priority DE4307193.7 - 03/08/1993 ·
19 Claims, No Drawings


Abstract

C.sub.1 -C.sub.4 -Alkyl nitrites can be prepared by reaction of C.sub.1 -C.sub.4 -alkanols with nitrogen oxides with the participation of oxygen in a reactor designed as a scrubber column, nitrogen oxides having a proportion of more than 50% of NO of the total amount of gram atoms of N of the nitrogen oxides, oxygen and optionally inert gas being fed into the lower part of the reactor. 5 to 60% of the total amount of C.sub.1 -C.sub.4 -alkanol used is likewise fed into the lower part of the reactor in vaporous or atomized form, while the remaining C.sub.1 -C.sub.4 -alkanol is delivered to the column head.

Independent Claims | See all claims (19)

  1. 1. A process for the preparation of a C.sub.1 -C.sub.4 -alkyl nitrite by reaction of a C.sub.1 -C.sub.4 -alkanol with nitrogen oxide and oxygen, in a reactor designed as a scrubber column, at 10.degree. to 150.degree. C. and 0.5 to 6 bar, and at a reaction time of 1 to 500 seconds, wherein the nitrogen oxide and oxygen is fed into the lower part of the reactor, said nitrogen oxide being nitrogen monoxide either alone or in combination with a member selected from the group consisting of N.sub.2 O.sub.3, NO.sub.2, N.sub.2 O.sub.4 and mixtures thereof, wherein the NO fed is in an amount that is more than 50% of the nitrogen oxide, based on the total gram atoms of Nitrogen in said nitrogen oxide, and wherein said nitrogen oxide is undiluted or diluted with one or more inert gases, the proportion of said inert gas or gases being 0-90% by volume of all gases used, the amount of oxygen being 0.15-0.3 moles per mole of NO which exceeds the number of moles of NO.sub.2, each mole of dinitrogen tetroxide being counted as two moles of nitrogen dioxide for the purpose of calculating said amounts, and wherein the total amount of C.sub.1 -C.sub.4 -alkanol used is 0.8 to 2 moles per gram atom of nitrogen in the nitrogen oxide, part of which is used in the lower part of the reactor and part of which is used at the reactor head, wherein said alkanol used at the lower part of the reactor is atomized using an inert gas, the oxygen or both, and is in an amount of 5 to 60% of the total amount of alkanol used, while the remainder of said alkanol is used at the reactor head.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4353843 Union Carbide Corporation Doumaux, Jr. et al. Oct 1982
US4908466 Union Carbide Chemicals and Plastics Company Inc. Nelson Mar 1990

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP0046983Ube Industries, Ltd.Mar 1982
EP0076217UNION CARBIDE CORPORATIONApr 1983
EP0310191UNION CARBIDE CORPORATIONApr 1989
EP0425197UBE INDUSTRIES, LTD.May 1991

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