Method for hydrotreating butanol and octanol raffinate

A technology for hydrotreating and residual liquid, applied in chemical instruments and methods, chemical/physical processes, preparation of organic compounds, etc., can solve the problems of poor recovery efficiency of butanol residual liquid, save resources and improve recycling Efficiency, the effect of improving stability

Active Publication Date: 2021-02-05
DOT CHEM TECH R&D INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the defect of poor recovery benefit of the butanol raffinate in the prior art, thereby providing a method for hydrotreating the butanol raffinate

Method used

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  • Method for hydrotreating butanol and octanol raffinate
  • Method for hydrotreating butanol and octanol raffinate

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Experimental program
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Embodiment 1

[0039] The present embodiment provides a method for hydrotreating butanol raffinate, comprising the steps of:

[0040] Preparation of supported catalyst:

[0041] Use aluminum nitrate to prepare 1L of aluminum nitrate aqueous solution containing aluminum 171.9g / L;

[0042] Use copper nitrate to prepare 1L of copper nitrate aqueous solution containing copper 140.0g / L;

[0043] Use sodium carbonate to prepare the precipitant aqueous solution containing sodium carbonate 156.5g / L;

[0044] Mix the above-mentioned aluminum nitrate aqueous solution and copper nitrate aqueous solution evenly, heat to 50° C., add the precipitant aqueous solution at a stirring rate of 200 rpm, and stop adding the precipitant aqueous solution when the pH value of the reaction solution reaches 8.5. Continue co-precipitation at this temperature and stirring state for 2 hours; filter and wash the precipitate with water; then dry at 120°C for 6 hours, and roast at 550°C for 6 hours in a nitrogen atmospher...

Embodiment 2

[0051] The present embodiment provides a method for hydrotreating butanol raffinate, comprising the steps of:

[0052] Preparation of supported catalyst:

[0053] 300 mesh copper oxide powder 112.5g and 300 mesh TiO 2 Mix 110g of powder, add 15g of water, and knead for 30min to obtain a mixture;

[0054] Send the above-mentioned mixture into an extruder to extrude and shape to obtain a molded product;

[0055] After drying the molding at 120°C for 4 hours, it was calcined at 500°C for 6 hours to obtain 200g of a catalyst with a mass content of 45% copper as the active component.

[0056] Detected by the BET method specific surface area analyzer, the specific surface area of ​​the above-mentioned supported catalyst is 55m 2 / g.

[0057] Hydrotreating butanol raffinate:

[0058] The butanol raffinate is adjusted to a pH of 6.5 with an aqueous solution of trimethylamine containing 70 wt % of water to obtain the butanol raffinate after the pH adjustment for subsequent use;

...

Embodiment 3

[0062] The present embodiment provides a method for hydrotreating butanol raffinate, comprising the steps of:

[0063] Preparation of supported catalyst:

[0064] Prepare 200ml of copper nitrate aqueous solution containing 150.0g / L of copper; then put 162.4g of silicon dioxide into the above-mentioned copper nitrate aqueous solution, soak at a constant temperature of 50°C for 1h, and then dry the impregnated silicon dioxide at 120°C for 4h, Calcined at 450° C. for 4 hours to obtain 200 g of a supported catalyst with a mass content of 15% copper as the active component.

[0065] Detected by the BET method specific surface area analyzer, the specific surface area of ​​the above-mentioned supported catalyst is 125m 2 / g.

[0066] Hydrotreating butanol raffinate:

[0067] The butanol raffinate is adjusted to a pH of 7.0 by using an aqueous solution of trimethylamine containing 70 wt % of water to obtain the butanol raffinate after adjusting the pH for subsequent use;

[0068] ...

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Abstract

The invention relates to the technical field of waste liquid recovery, in particular to a method for hydrotreating butanol and octanol raffinate, which comprises the following steps of: regulating thepH value of the butanol and octanol raffinate to 6-9 by using organic alkali, carrying out hydro-conversion, and separating the hydro-converted product to obtain alcohol. According to the preparationmethod of the butanol and octanol raffinate, the pH value of the butanol and octanol raffinate is limited and adjusted by an organic base, the organic base can play a role of an alkaline assistant, the efficiency of hydro-conversion of aldehyde, ketone, ester and other compounds, especially ester compounds, in the butanol and octanol raffinate into alcohol can be promoted, and the recycling efficiency of the butanol and octanol raffinate is improved. The situation that the recycling efficiency of butanol and octanol raffinate is reduced due to the fact that metal ions in the inorganic base have a passivation effect on a hydrogenation catalyst is prevented.

Description

technical field [0001] The invention relates to the technical field of waste liquid recovery, in particular to a method for hydrotreating butanol raffinate. Background technique [0002] Butanol (butyl alcohol) and octanol (isooctanol is commonly known as octanol, 2-ethylhexanol; 2-ethyl hexanol) can be produced by hydroxyl synthesis in the same device, so they are customarily called butanol . Butyl octanol is an important raw material for the synthesis of fine chemical products, mainly used in the production of plasticizers, solvents, dehydrating agents, defoamers, dispersants, flotation agents, petroleum additives and synthetic fragrances. [0003] The production process of butyl octanol mainly uses propylene and synthesis gas as raw materials. Under the action of a catalyst, the main product n-butyraldehyde and by-product isobutyraldehyde are first produced through carbonylation reaction, and then n-butyraldehyde and isobutyraldehyde are hydrogenated Directly produce n-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/141B01J23/72B01J23/755B01J23/75B01J35/10B01J37/03B01J37/08B01J37/00B01J37/02
CPCC07C29/141B01J23/72B01J23/755B01J23/75B01J23/002B01J35/1019B01J35/1014B01J37/031B01J37/086B01J37/0009B01J37/0201B01J37/088
Inventor 王振凡李春伟于海龙胡伟光黄珍妮宋敬文刘国新顾天宇
Owner DOT CHEM TECH R&D INC
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