Method and apparatus for preparing isopropyl alcohol
US-9895625-B2 · Feb 20, 2018 · US
Method for purifying phenol
US10532968B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10532968-B2 |
| Application number | US-201716071553-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 10, 2017 |
| Priority date | Nov 14, 2016 |
| Publication date | Jan 14, 2020 |
| Grant date | Jan 14, 2020 |
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- Title
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Abstract
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The present invention relates to a method for purifying phenol, which comprises: supplying a feed comprising phenol, acetone, hydroxyacetone and water to a distillation column at 60° C. to 95° C.; separating the feed into a first fraction, which comprises the acetone, and separates to the upper part of the distillation column and a second fraction, which comprises the phenol, and separates to the lower part of the distillation column; and recovering the first fraction and the second fraction, respectively.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for purifying phenol, comprising: supplying a feed comprising phenol, acetone, hydroxyacetone and water to a distillation column at 60 to 95° C.; separating the feed into a first fraction which comprises the acetone and separates to the upper part of the distillation column and a second fraction which comprises the phenol and separates to the lower part of the distillation column; and recovering the first fraction and the second fraction, respectively, wherein the distillation column comprises a middle inlet to which the feed is input; a first line from which the first fraction is extracted; and a second line from which a second fraction is extracted, wherein the distillation column does not comprise a middle outlet, and wherein the feed comprises 40 to 70 wt % of the phenol, 15 to 45 wt % of the acetone, 0.02 to 5 wt % of the hydroxyacetone, and 9 to 11 wt % of water with respect to the total weight of the feed. 2. The method of claim 1 , wherein the feed is prepared by oxidizing an alkylaryl compound to prepare a reaction mixture comprising an alkylaryl hydroperoxide and an unreacted alkylaryl compound and performing a cleavage reaction on the reaction mixture. 3. The method of claim 2 , wherein the feed comprises one or more selected from the group consisting of cumene, α-methyl styrene, methanol, acetaldehyde, formaldehyde, cumylphenol, dicumyl peroxide, an α-methyl styrene dimer, mesityl oxide, 2-methylbenzofuran and phenol tar. 4. The method of claim 1 , wherein the feed is supplied to the column at 75 to 95° C. 5. The method of claim 1 , wherein the feed has a pH of 3 to 10. 6. The method of claim 1 , wherein the hydroxyacetone in the second fraction is contained at 200 ppm or less based on weight of the second fraction.
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Classifications
by azeotropic distillation · CPC title
Other features of fractionating columns {; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30} · CPC title
- C07C37/78Primary
by azeotropic distillation · CPC title
Phenol · CPC title
Azeotropic distillation · CPC title
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- What does patent US10532968B2 cover?
- The present invention relates to a method for purifying phenol, which comprises: supplying a feed comprising phenol, acetone, hydroxyacetone and water to a distillation column at 60° C. to 95° C.; separating the feed into a first fraction, which comprises the acetone, and separates to the upper part of the distillation column and a second fraction, which comprises the phenol, and separates to t…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07C37/78. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 14 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).