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The production of feed for an olefin hydration zone is improved by integrating treatment of an alcohol containing stream from a fermentation zone into an alcohol separation section. The process passes a stream comprising alcohol, water and an organic acid to a separation column. The separation colum

The production of feed for an olefin hydration zone is improved by integrating treatment of an alcohol containing stream from a fermentation zone into an alcohol separation section. The process passes a stream comprising alcohol, water and an organic acid to a separation column. The separation column concetrates the alcohol and organic acids into an upper column fraction. An additive for neutralization the organic acid into contact with said upper column fraction and reacts with the organic acid to produce a neutralization product that passes to a lower portion of the separation column. The column provides an overhead stream for an olefin dehydration zone having an increased concentration of alcohol and a reduced concentration of organic acid. A column bottoms stream containing the neutralization product returns as an input stream to supply the neutralization product to a fermentation zone that produces the alcohol containing stream.

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1. Process for preparing an alcohol containing stream from an alcohol producing fermentation zone as a feed for an olefin reaction zone by removing organic acids, said process comprising: a) passing a fermentation stream produced in a fermentation zone to a separation zone, said fermentation stream

1. Process for preparing an alcohol containing stream from an alcohol producing fermentation zone as a feed for an olefin reaction zone by removing organic acids, said process comprising: a) passing a fermentation stream produced in a fermentation zone to a separation zone, said fermentation stream comprising an alcohol, water and an organic acid;b) concentrating the alcohol and organic acid into an upper column fraction in said separation zone;c) injecting an additive for neutralization of said organic acid into contact with said upper column fraction;d) reacting said additive with said organic acid to produce a neutralized product that passes to a lower portion of a separation column within said separation zone;e) recovering a column overhead from said separation zone having an increased concentration of the alcohol and a reduced concentration of said organic acid;f) recovering a column bottoms stream containing said neutralization product; and,g) returning the column bottoms stream from said separation zone to an alcohol producing fermentation zone. 2. The process of claim 1 wherein the fermentation zone produces a fermentation stream comprising an ethanol containing stream and the column overhead stream passes to a reaction zone for the production of ethylene. 3. The process of claim 2 wherein the fermentation zone converts syngas components into ethanol, the fermentation stream includes acetic acid and the neutralization additive comprises sodium hydroxide. 4. The process of claim 3 wherein the neutralization product comprises sodium acetate and the bottoms stream mixes with an aqueous fermentation broth to supply sodium acetate to the fermentation zone. 5. The process of claim 4 wherein the fermentation zone produces a fermentation stream comprising water, 2 to 5 wt % ethanol, at least 0.3 wt % acetate and free acetic acid of at least 0.1 wt %; the column overhead stream comprises 70 to 80 wt % of ethanol and is relatively free of organic acid; and the reaction zone comprises a catalytic dehydration zone. 6. The process of claim 5 wherein the addition of sodium hydroxide neutralizes the column overhead to a pH of about 6.0. 7. The process of claim 1 wherein the fermentation zone contains microorganisms selected from the group consisting of Clostridium ragsdalei, Butyribacterium methylotrophicum, Clostridium ljungdahlii, Clostridium carboxidivorans, and combinations thereof and for the production of the liquid product selected from the group consisting of ethanol, n-butanol, hexanol, acetic acid, butyric acid, and combinations thereof. 8. The process of claim 1 wherein the separation column comprises a distillation column, at least a portion of the fermentation stream enters the distillation column and the columns bottoms stream is recovered from the distillation column. 9. The process of claim 8 wherein the fermentation stream enters a stripping column, the stripping column overhead passes to the distillation column and at least a portion of the distillation column bottoms stream and the stripping column bottoms stream are combined and returned to the fermentation zone. 10. The process of claim 1 wherein a portion of the separation column includes a reflux condenser and the additive is combined with the condensate reflux to the column to provide additive to the upper column fraction. 11. A process for reducing organic acid in an ethanol containing stream from a syngas fermentation zone, said process comprising: a) passing a syngas stream containing at least one of CO or a mixture of CO2 and H2 to a fermentation zone and converting at least a portion of the syngas to ethanol;b) withdrawing a fermentation stream comprising water, 2 to 5 wt % ethanol, at least 0.3 wt % acetate and free acetic acid of at least 0.1 wt %;c) passing the fermentation stream to a separation column and concentrating the ethanol and organic acids into an upper column fraction;d) injecting an additive for neutralization of said acetic acid into contact with said upper column fraction;e) reacting said additive with said acetic acid to produce a neutralization product that passes to a lower portion of the separation column;f) recovering a column overhead that is relatively free of organic acid and has at least 50 wt % of ethanol;g) recovering a column bottoms stream containing said neutralization product;h) returning at least a portion of the column bottoms stream to an aqueous fermentation broth in the fermentation zone. 12. The process of claim 11 wherein at least a portion of the column overhead stream passes to a catalytic dehydration zone for the production of ethylene. 13. The process of claim 12 wherein the neutralization product comprises sodium acetate and a sodium hydroxide is added in sufficient quantity as the additive to neutralize the column overhead to a pH of about 6.0. 14. The process of claim 13 wherein the fermentation zone contains microorganisms selected from the group consisting of Clostridium ragsdalei, Butyribacterium methylotrophicum, Clostridium ljungdahlii, Clostridium carboxidivorans. 15. The process of claim 11 wherein the separation column comprises a distillation column, at least a portion of the fermentation stream enters the distillation column, the columns bottoms stream is recovered from the distillation column, and a column overhead having an ethanol concentration of at least 70 wt % is withdrawn from the distillation column. 16. The process of claim 15 wherein the fermentation stream enters a stripping column, the stripping column overhead passes to the distillation column and at least a portion of the distillation column bottoms stream and the stripping column bottoms stream are combined and returned to the fermentation zone. 17. The process of claim 16 wherein the dehydration zone contacts the alcohol stream with a catalyst selected from the group comprising alumina or alumina-silica. 18. A process for producing ethylene by reducing organic acid in an ethanol containing stream from a syngas fermentation zone and dehydrating the ethanol in an ethanol dehydration zone, said process comprising: i) passing a syngas stream containing at least one of CO or a mixture of CO2 and H2 to a fermentation zone and converting at least a portion of the syngas to ethanol;j) withdrawing a fermentation stream comprising water, 2 to 5 wt % ethanol, at least 0.3 wt % acetate and free acetic acid of at least 0.1 wt %;k) passing at least a portion of the fermentation stream to a distillation column and concentrating the ethanol and organic acids into an upper column fraction;l) injecting an additive for neutralization of said acetic acid into contact with said upper column fraction;m) reacting said additive with said acetic acid to produce a neutralization product that passes to a lower portion of the distillation column;n) recovering a column overhead having at least 50 wt % of ethanol and is relatively free of organic acid;o) recovering a column bottoms stream containing said neutralization product and having a pH in a range of from 5.5 to 8.0 from the distillation column;p) returning at least a portion of the column bottoms stream to an aqueous fermentation broth in the fermentation zone; and,q) passing at least a portion of the column overhead stream to a catalytic dehydration zone for the production of ethylene. 19. The process of claim 18 wherein the additive comprises sodium hydroxide and the neutralization product comprises sodium acetate. 20. The process of claim 18 wherein the fermentation zone contains microorganisms selected from the group consisting of Clostridium ragsdalei, Butyribacterium methylotrophicum, Clostridium ljungdahlii, Clostridium carboxidivorans. 21. The process of claim 15 wherein the fermentation stream enters a stripping column, the stripping column overhead passes to the distillation column, at least a portion of the distillation column bottoms stream and the stripping column bottoms stream are combined and returned to the fermentation zone and a column overhead having an ethanol concentration at least 70 wt % is withdrawn from the distillation column.