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AssigneeRhodia Inc.
InventorsRichard Wai-Chun Liu, Philip Dean Hill, Thomas Edwin Pruitt, Forrest Lee Sanders, Albert Yi Yang
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There is a process for removing by-product tar during the manufacture of isopropyl alcohol. The process comprises the following: a) reacting propylene with concentrated sulfuric acid and water to form isopropyl alcohol and a spent acid having a by-product tar; b) capturing at least a portion of the isopropyl alcohol; c) contacting the spent acid with a gas in bubble form; d) allowing a least a portion of the tar to separate from the remainder of the spent acid to form a layer of tar and a layer of cleaned acid solution; e) capturing the tar; and h) recycling the cleaned acid solution to step a) as a source of sulfuric acid. There is also a process for removing by-product tar during the manufacture of methyl ethyl ketone. The process is substantially the same except that 1-butene is substituted for propylene. There is also a process for removing tar from a spent acid.
A process for removing by-product tar during the manufacture of isopropyl alcohol, comprising:
A process for removing by-product tar during the manufacture of methyl ethyl ketone, comprising:
The process of clam 9, wherein the cleaned acid solution is heated to form concentrated sulfuric acid prior to return to step a).
The process of clam 10, wherein the captured tar is subsequently fluidized by addition of dilute sulfuric acid and a surfactant thereto, and wherein the fluidized tar is incinerated to form sulfur dioxide, and wherein the sulfur dioxide is converted to sulfur trioxide, and wherein the sulfur trioxide is contacted with dilute sulfuric acid to form an enriched concentrated sulfuric acid for return to step a).
A process for removing tar from a spent acid, comprising:
Dependencies are inferred from the claim text.