PROCESS FOR MAKING AND REFINING 3-PENTENENITRILE, AND FOR REFINING 2-METHYL-3-BUTENENITRILE
申请人:FOO THOMAS
公开号:US20090182163A1
公开(公告)日:2009-07-16
The invention provides an integrated, continuous process for the production of 3-pentenenitrile, the refining of 3-pentenenitrile, and the refining of 2-methyl-3-butenenitrile, the process comprising:
(a) contacting, in a reaction zone, a hydrogen cyanide-containing feed, a butadiene-containing feed, and a catalyst composition, wherein the catalyst composition comprises a zero-valent nickel and at least one bidentate phosphorus-containing ligand selected from the group consisting of a phosphite, a phosphonite, a phosphinite, a phosphine, a mixed phosphorus-containing ligand, and combination thereof;
(b) maintaining a residence time in the reaction zone sufficient to convert about 95% or more of the hydrogen cyanide and to produce a reaction mixture comprising 3-pentenenitrile and 2-methyl-3-butenenitrile, wherein the 2-methyl-3-butenenitrile concentration is maintained below about 15 weight percent of the total mass of the reaction mixture;
(c) distilling the reaction mixture to obtain a first stream comprising 1,3-butadiene, a second stream comprising 3-pentenenitrile, 2-methyl-3-butenenitrile, (Z)-2-methyl-2-butenenitrile, and optionally 1,3-butadiene, and a third stream comprising the catalyst composition;
(d) distilling the second stream to obtain a fourth stream comprising 1,3-butadiene, a fifth stream comprising 2-methyl-3-butenenitrile, (Z)-2-methyl-2-butenenitrile, and optionally 1,3-butadiene, and a sixth stream comprising 3-pentenenitrile; and
(e) distilling the fifth stream to obtain a seventh stream comprising 1,3-butadiene, an eighth stream comprising (Z)-2-methyl-2-butenenitrile, and a ninth stream comprising 2-methyl-3-butenenitrile.
该发明提供了一种用于生产3-戊烯腈、精制3-戊烯腈和精制2-甲基-3-丁烯腈的集成连续工艺,该工艺包括:(a)在反应区域中接触含氰化氢的原料、含丁二烯的原料和催化剂组合,其中催化剂组合包括零价镍和至少一种双齿磷含配体,所述双齿磷含配体选自磷酸酯、膦酸酯、膦酸酯、膦、混合磷含配体及其组合物;(b)在反应区域内保持足够的停留时间,使大约95%或更多的氰化氢转化并产生包含3-戊烯腈和2-甲基-3-丁烯腈的反应混合物,其中2-甲基-3-丁烯腈浓度保持在反应混合物总质量的约15%以下;(c)蒸馏反应混合物以获得包含1,3-丁二烯的第一流、包含3-戊烯腈、2-甲基-3-丁烯腈、(Z)-2-甲基-2-丁烯腈和可选的1,3-丁二烯的第二流,以及包含催化剂组合的第三流;(d)蒸馏第二流以获得包含1,3-丁二烯的第四流、包含2-甲基-3-丁烯腈、(Z)-2-甲基-2-丁烯腈和可选的1,3-丁二烯的第五流,以及包含3-戊烯腈的第六流;(e)蒸馏第五流以获得包含1,3-丁二烯的第七流、包含(Z)-2-甲基-2-丁烯腈的第八流,以及包含2-甲基-3-丁烯腈的第九流。