发明名称 |
Catalytic prepn. of methanol from synthesis gas contg. hydrogen@, carbon mon:oxide and carbon di:oxide - by sepg. methyl formate from prod. and feeding back to reactor to increase yield |
摘要 |
In the catalytic prepn. of methanol from synthesis gas contg. hydrogen, carbon monoxide and carbon dioxide at 220-300 deg. C and at 20-120 bar pressure to give a methanol-contg. vapour. The vapour is drawn off and cooled to 20-60 deg. C giving a condensate contg. water, methanol and methyl formate and a gaseous mixture of hydrogen, carbon monoxide and carbon dioxide which is fed back to the reactor. A methyl formate-contg. fraction with 10-100 wt.% of methyl formate is sepd. from condensate and fed back to the reactor and mixed with synthesis gas. The methyl formate fraction is sprayed into the synthesis gas as a fluid. The methyl formate fraction is heated to 170-240 deg. C by the synthesis gas before being fed to the reactor. The fraction contains at least 30 wt.% of methyl formate, and is sepd. by distn. under pressure of 1-7 bar. The synthesis gas may have methyl formate from an extraneous source added before it enters the reactor. The methyl formate reacts with excess hydrogen to give further methanol. ADVANTAGE - Makes better use of the synthesis gas, giving increased yield of methanol. In an example, a synthesis gas contg. 3 vol.% CO2, 10 vol%CO, 70 vol% H2 and 17 vol% of CH4+N2 was reactred in a reactor (2) at 250 deg. C and 50 bar in the presence of a copper-zinc catalyst. A condensed product contg. 85.94 g of methanol and 0.65 g of methyl formate per hour was obtained and fed to a distillation column (17) working at 60 deg. C. The vapour produced was cooled to 20 deg. C giving a fluid product contg. 30 wt.% of methyl formate which was pumped (19) back to the synthesis gas line (1). Methanol prodn. rose to 86.65 g/h. |
申请公布号 |
DE4239904(A1) |
申请公布日期 |
1994.06.01 |
申请号 |
DE19924239904 |
申请日期 |
1992.11.27 |
申请人 |
METALLGESELLSCHAFT AG, 60323 FRANKFURT |
发明人 |
KOENIG, PETER, DR., 6000 FRANKFURT;SUPP, EMIL, 6057 DIETZENBACH;MOELLER, FRIEDRICH-WILHELM, DR., 6382 FRIEDRICHSDORF |
分类号 |
C07C29/151 |
主分类号 |
C07C29/151 |
代理机构 |
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