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公开(公告)号:US6018074A
公开(公告)日:2000-01-25
申请号:US68300
申请日:1998-10-05
申请人: Detlef Kratz , Achim Stammer , Tom Witzel , Martin Brudermuller
发明人: Detlef Kratz , Achim Stammer , Tom Witzel , Martin Brudermuller
IPC分类号: C07C27/02 , C07C29/09 , C07C29/128 , C07C29/38 , C07C31/22 , C07C35/08 , C07C67/02 , C07C67/08 , C07C67/44 , C07C69/06 , C07C45/00 , C07C31/18
CPC分类号: C07C29/38 , C07C29/1285 , C07C67/08 , C07C2101/14
摘要: A process for the preparation of polyalcohols comprises the stages:(a) Reaction of an alkanal or ketone with formaldehyde in aqueous solution in the presence of a tertiary amine, to form a formates containing polyalcohol product mixture,(b) removal of water, excess tertiary amine, excess formaldehyde(c) heating of remaining mixture from (b) with removal of further formaldehyde and tertiary amine with formation of the formates of the polyalcohol,(d) transfer of tertiary amine removed from stage (b) and/or from stage (c), to synthesis stage (a) and/or to the subsequent transesterification stage (e),(e) transesterification of the resulting formates of the polyalcohol from stage (c) with an alcohol of the formula ROH in the presence of a transesterification catalyst to give polyalcohols and formates of the formula ##STR1## where R is a hydrocarbon radical, preferably alkyl of 1-6, particularly preferably 1-2, carbon atoms, and(f) isolation of the polyalcohols.
摘要翻译: PCT No.PCT / EP96 / 04922 Sec。 371日期:1998年10月5日 102(e)日期1998年10月5日PCT 1996年11月11日PCT公布。 公开号WO97 / 17313 日期1997年5月15日制备多元醇的方法包括以下阶段:(a)在叔胺存在下,在水溶液中使烷醛或酮与甲醛反应,形成含有多元醇产物混合物的甲酸盐,(b) 的水,过量的叔胺,过量的甲醛(c)从(b)加热剩余的混合物,同时除去多元醇的甲酸盐形成的另外的甲醛和叔胺,(d)从阶段(b)中除去的叔胺的转移, 和(或)从阶段(c)到合成阶段(a)和/或后续酯交换反应阶段(e),(e)所得到的多元醇的甲酸酯从阶段(c)与式ROH的醇进行酯交换反应 在酯交换催化剂的存在下,得到下式的多元醇和甲酸盐,其中R是烃基,优选1-6的烷基,特别优选1-2的碳原子,和(f)多元醇的分离。