Copper-based catalyst as well as manufacture method and application thereof

A technology of copper-based catalysts and manufacturing methods, applied in the fields of carbon-based compound preparation, chemical instruments and methods, physical/chemical process catalysts, etc.

Pending Publication Date: 2019-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is still room for improvement in the production methods of acetoin in the prior art in terms of harmful impurity content or industrial implementation

Method used

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  • Copper-based catalyst as well as manufacture method and application thereof
  • Copper-based catalyst as well as manufacture method and application thereof
  • Copper-based catalyst as well as manufacture method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0139] According to an embodiment of the present invention, the step (2-1) may include the step (2-1-1).

[0140] Step (2-1-1): under the conditions of temperature 100-200° C. and pressure 0.1-5 MPa, contact the ketone compound represented by the formula (II) with the catalyst precursor for 2-60 hours.

[0141] According to one embodiment of the present invention, in the step (2-1-1), there is no particular limitation on the method of contacting the ketone compound represented by the formula (II) with the catalyst precursor, specifically For example, it can be mentioned that the ketone compound represented by the formula (II) is contacted with the catalyst precursor in the form of a gaseous state or a gas mixture, or specifically such as making the ketone compound represented by the formula (II) The ketones are adsorbed by the catalyst precursor in gaseous state or gas mixture until a predetermined content is reached.

[0142] According to one embodiment of the present invent...

Embodiment 1

[0227] The preparation method of copper-based catalyst H1 is as follows:

[0228] (1-1) Weigh 122 g of copper nitrate, 103 g of ytterbium nitrate and 88 g of aluminum nitrate respectively, dissolve them in 1 L of deionized water, and prepare solution A1. Weigh 16 g of potassium hydroxide and 24 g of potassium bicarbonate respectively, dissolve them in 1L of deionized water, and configure solution B1. Add 1L of deionized water into a 5L beaker, raise the temperature and maintain it at 75°C, add solutions A1 and B1 dropwise at the same time under the condition of continuous stirring, control the pH value to maintain around 8.0, and continue stirring for 2 h after the dropwise addition is completed , followed by static aging for 2 h, and filtered to obtain precipitate C1.

[0229] (1-2) Dry the precipitate C1 at 110°C for 24 hours, then bake it at 400°C for 5 hours, then add graphite powder with 3% weight of the precipitate as a lubricant, press into tablets, and then bake at 40...

Embodiment 2

[0234] The preparation method of copper-based catalyst H2 is as follows:

[0235] (1) Using the catalyst H1 prepared in Example 1 as the catalyst precursor;

[0236] (2) Grind the above catalyst precursor H1 into powder, add the H1 powder into the straight sample tube of TP-5082 chemical adsorption instrument, raise the temperature to 100°C under nitrogen atmosphere, and switch to the volume fraction of acetoin It is 1% acetoin / nitrogen mixed gas, the treatment time is 48 hours, and the temperature is lowered to take out as catalyst H2.

[0237] Through element analysis, the weight content of CuO of catalyst H2 is 40.1%, Yb 2 o 3 The weight content is 44.0%, K 2 The weight content of O is 2.6%, Al 2 o 3 The weight content of acetoin is 12.1%, and the weight content of acetoin is 1.2%.

[0238] Before the catalyst H2 is used for the reaction of glycol dehydrogenation to prepare hydroxy ketones, the following steps are used for pretreatment:

[0239] (3-1) Weigh 10 g of c...

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Abstract

The invention relates to a copper-based catalyst as well as a manufacture method thereof and application of the copper-based catalyst serving as a dehydrogenation catalyst to manufacture of hydroxyketone compounds, such as acetylmethylcarbinol. The copper-based catalyst comprises copper and at least one auxiliary metal and alkali metal in IIA group metal, VII group non-noble metal, VIB group metal, VIIB group metal, IIB group metal and lanthanide series metal which are selected from the periodic table of the elements, and further comprises at least one ketone additive selected from a ketone compound as shown in a formula (II) and a ketone compound as shown in a formula (II'). The copper-based catalyst shows high acetylmethylcarbinol selectivity when serving as a dehydrogenation catalyst tomanufacture acetylmethylcarbinol. R1-C (=0)-CH (OH)-R2 (II) R1-C(=0)-CH (=0)-R2 (II'), in the formulas (II) and (II'), all groups are as defined in the specification.

Description

technical field [0001] The invention relates to a copper-based catalyst, in particular to a copper-based dehydrogenation catalyst. The invention also relates to a method for producing the copper-based catalyst and its application as a dehydrogenation catalyst in the production of hydroxyketone compounds such as acetoin. Background technique [0002] Acetoin, also known as 3-hydroxybutanone, naturally exists in many foods such as corn, grapes, apples, meat, etc. It is a widely used edible spice with a pleasant creamy fragrance, mainly used as cream, dairy products , yoghurt and strawberry type and other spices production. Acetoin is also an intermediate of many drugs. [0003] The acetaldehyde condensation method is currently the main production process of food additive grade acetoin in China. Because the thiazolium salt catalyst used in this process is expensive and difficult to effectively separate from the product, the commercially available acetoin food additive will m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/78B01J23/80C07C45/00C07C49/17
Inventor 乔凯周峰苏杰马会霞翟庆铜张淑梅
Owner CHINA PETROLEUM & CHEM CORP
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