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    • 6. 发明公开
    • VERFAHREN ZUR TRENNTECHNISCHEN BEARBEITUNG EINES PRODUKTSTROMS EINES DIMETHYLETHERREAKTORS
    • EP3092053A1
    • 2016-11-16
    • EP15700038.1
    • 2015-01-05
    • Linde Aktiengesellschaft
    • FRITZ, HelmutPESCHEL, Andreas
    • B01D53/14B01D3/14B01D5/00C07C41/34C07C41/42C07C43/04F25J3/06
    • C07C41/42B01D3/143B01D53/1493B01D2257/108B01D2257/502B01D2257/504B01D2257/80C07C41/40Y02A50/2341Y02C10/06Y02P20/152Y02P70/34C07C43/043
    • The invention relates to a separation processing method for a product stream (g) of a reactor (4) used for the synthesis of dimethyl ether (z) from synthesis gas (e), said product stream containing at least dimethyl ether, methanol, water, carbon dioxide, carbon monoxide and hydrogen. The product stream (g) is fed into a liquid reflux-operated absorption column (6) at least partially in a gaseous state, wherein a gaseous top stream (m) is removed from the absorption column (6) at the top end, and a liquid bottom stream (p) is removed at the bottom end of the absorption column. At least part of the bottom stream (p) is fed into a first distillation column (5), wherein a gaseous transfer stream (q) containing dimethyl ether, and a stream (r) predominantly containing methanol and/or water are removed from the first distillation column (5). At least part of the top stream (m) is first cooled to a first temperature level and subsequently further cooled to one or more additional temperature levels, wherein a first condensate stream (n) is formed after the cooling to the first temperature level, and one or more additional condensate streams (s, t) are formed after the further cooling to the additional temperature level(s). Part of the first condensate stream (n) is used to form the liquid reflux, and at least part of the additional condensate stream(s) (s, t) are fed into an additional distillation column (9), from which a liquid stream (z) is removed at the bottom end, said liquid stream substantially containing dimethyl ether and having little or no carbon dioxide. The invention also relates to a corresponding separation plant and a plant (100) for producing dimethyl ether.
    • 通过分离技术从用于合成二甲醚的反应器(4)中处理至少含有二甲醚,甲醇,水,二氧化碳,一氧化碳和氢气的产物流(g)的方法( z)由合成气(e)提出。 将产物流(g)以至少部分气态形式进料到用液体回流操作的吸收塔(6)中,从顶部的吸收塔(6)除去气态顶部流(m) 液底池(p)在底部被移除。 贮槽料流(p)至少部分地进料到第一蒸馏塔(5)中,含有二甲醚的气态转移料流(q)和主要含有甲醇和/或水的料流(r)从第一蒸馏塔 (5)。 顶部流(m)至少部分地冷却至第一温度水平,随后进一步冷却至一个或多个其它温度水平,第一冷凝物流(n)在冷却至第一温度水平之后形成,并且一个或多个 在进一步冷却到另外的温度水平或水平之后形成另外的冷凝物流(s,t)。 第一冷凝物流(n)被部分地用于形成液体回流,并且另外的冷凝物流(s,t)至少部分地进料到另外的蒸馏塔(9)中,液体流 ),主要含有二甲醚,二氧化碳不足或不含二氧化碳。 本发明还涉及相应的分离装置和用于生产二甲醚的装置(100)。