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Method and catalyst for extracting 2-octanone from crude 2-octyl alcohol and hydrogenating to prepare 2-octyl alcohol

A technology for crude sec-octanol and sec-octone, applied in the field of chemical refining, can solve the problems of low selectivity, long reaction time, complicated methods, etc., and achieve the effects of improving catalyst activity, prolonging service life and saving production costs.

Active Publication Date: 2018-11-09
WEIFANG YUANLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN94190945 introduces a preparation method of copper-containing hydrogenation catalyst, which requires a molding matrix of copper-containing hydrogenation reaction catalyst, but the selectivity is low, and product separation and purification are difficult
However, the current method of extracting 2-octanone and hydrogenating 2-octanol from crude 2-octanol to produce 2-octanol mainly has the following defects: (1) the method is complicated and the process conditions are difficult to control; (2) the selectivity and conversion rate are low, and the Not easy to separate; (3) The production method has high requirements on equipment and long reaction time

Method used

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  • Method and catalyst for extracting 2-octanone from crude 2-octyl alcohol and hydrogenating to prepare 2-octyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 A kind of catalyst that produces secondary octanol by hydrogenation of secondary octanone

[0025] A catalyst for producing 2-octanol by hydrogenation of 2-octanone of the present invention is composed of activated carbon carrier and composite catalyst powder. The composite catalyst powder consists of 30 parts of diatomite, 15 parts of nickel oxide, 3 parts of zinc aluminate 2 parts, 2 parts of titanium oxide, 3 parts of niobium oxide, 8 parts of diboron trioxide, 11 parts of aluminum oxide, and 8 parts of zirconia.

[0026] The preparation method of described activated carbon carrier, comprises the steps:

[0027] a Selection of carrier materials

[0028] Select high-quality coconut shells as raw materials. The coconut shells are fresh coconut shells of the year, the outer green peel is removed, the long diameter is 5.5cm, the short diameter is 4.2cm, and the moisture content is 7.5%.

[0029] b alkali dipping

[0030] The above-mentioned coconut shells...

Embodiment 2

[0040] Embodiment 2 A kind of preparation method of the catalyst that produces secondary octanol by the hydrogenation of secondary octanone of the present invention comprises the following steps:

[0041] (1) Weigh diatomite, nickel oxide, zinc aluminate, titanium oxide, niobium oxide, boron trioxide, aluminum oxide, and zirconium oxide according to the proportion of the formula, add appropriate amount of deionized water, and grind for 5.5 hours in a colloid mill. Grind through a 200 mesh sieve.

[0042] (2) Weigh diatomite and dissolve it in deionized water, add zinc aluminate, niobium oxide, diboron trioxide, and aluminum oxide and stir to form a paste. After standing at room temperature for 12 hours, transfer to an oven to dry and grind;

[0043] Then it was placed in a tube furnace, and the temperature was raised to 455° C. at a rate of 10° C. / min under a nitrogen flow, and it was calcined for 0.5 h and then lowered to room temperature to obtain a powder.

[0044] (3) Add...

Embodiment 3

[0047] Example 3 A method of extracting secondary octanone and hydrogenating secondary octanol from crude secondary octanol to produce secondary octanol according to the present invention

[0048] Include the following steps:

[0049] A extracts 2-octyl ketone from crude 2-octanol:

[0050]Extract secondary octanone from crude secondary octanol according to the separation and purification method of partition distillation, wherein the pressure in the first chamber of the first distillation tower is 15kPa, the pressure in the second tower chamber is 12kPa, and the gas phase temperature at the top of the tower is 135°C. The pressure of the second distillation column is 20kPa, and the gas phase temperature at the top of the column is 160°C.

[0051] After testing, the extraction rate of secondary octanone in this step is 99.6%, the purity of secondary octanone is 99.2%, and the proportion of secondary octanol in impurities is 97.8%.

[0052] B hydrogenation reaction:

[0053] T...

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Abstract

The invention provides a method for extracting 2-octanone from crude 2-octyl alcohol and hydrogenating to prepare 2-octyl alcohol. The method comprises a reaction for extracting 2-octanone from crude2-octyl alcohol and a hydrogenating reaction, and the hydrogenating reaction is continuously carried out for 6 h at a temperature of 88 DEG C under a pressure of 3.5 MPa, at a hydrogen flow velocity of 120 ml / min and at a hydrogen / oil volume ratio of 4000:3. The invention also provides a catalyst. The catalyst comprises an active carbon carrier and a composite catalyst powder according to a ratioof 2:3, and the composite catalyst powder comprises 30 parts of diatomite, 15 parts of nickel oxide, 3 parts of zinc aluminate, 2 parts of titanium oxide, 8 parts of boron trioxide, 11 parts of alumina and 8 parts of zirconia. The catalyst has obviously improved catalyst and prolonged service life under same technologic conditions, can create more product values under same production raw materials, and also has the advantages of high selectivity, short reaction period, low cost, saving of the impurity removal process, and significant comprehensive economic benefit.

Description

technical field [0001] The invention belongs to the technical field of chemical refining, and relates to a method for preparing sec-octanol by hydrogenating sec-octanone, in particular to a method for preparing sec-octanol by hydrogenating sec-octanone extracted from crude sec-octanol and its catalyst . Background technique [0002] Alcohols and ketones are important chemicals at the present stage, and are widely used in industry and daily life; ketone hydrogenation is a common method for industrial production of alcohol, and the source of hydrogen atoms in ketone hydrogenation is generally hydrogen. [0003] Secondary octanol is an important chemical raw material, secondary octanol (English name sec-Caprylic alcohol, sec-Octyl alcohol), also known as 2-octanol (2-Caprylic alcohol, 2-Octyl alcohol), alias hexyl methyl carbinol (Hexyl methyl carbinol), 1-methylheptanol (1-Methylheptanol, 1-methylheptylalcohol), 2-hydroxyoctane (2-Hydroxyl octane). Colorless, transparent liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/145C07C31/125B01J23/847
CPCB01J23/002B01J23/8474B01J2523/00C07C29/145C07C31/125B01J2523/27B01J2523/305B01J2523/31B01J2523/41B01J2523/47B01J2523/48B01J2523/56B01J2523/847
Inventor 秦国栋钱瑞一李义田高伟王鹏
Owner WEIFANG YUANLI CHEM
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