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Catalyst used for preparing ethyl alcohol through acetic acid hydrogenation and preparation methods thereof

A catalyst, a technology for producing ethanol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of large heat release, operating rate of less than 60%, and the price of acetic acid, and achieve mild reaction conditions, The effect of solving the overcapacity of acetic acid

Active Publication Date: 2014-08-27
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the average operating rate of domestic acetic acid plants is less than 60%, and the production of acetic acid is relatively surplus, resulting in a continuous decline in the price of acetic acid. Therefore, it is urgent to develop downstream products of acetic acid and improve the industrial chain of the acetic acid industry.
[0006] The above-mentioned published results show that the application of supported Pt catalyst in the hydrogenation of acetic acid shows good catalytic performance, but the loading of Pt is still high, reaching more than 0.5%, and the preparation method is mainly based on the conventional impregnation method , in view of the large heat release during the hydrogenation reaction of acetic acid, resulting in a short catalyst life, optimizing the catalyst preparation method and selecting a good support and additives will further improve the interaction between the metal and the support, improve the hydrogenation activity and thermal stability of the catalyst sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084](1) Add 54.45g of basic cobalt carbonate, 6g of molybdenum oxide, 14.89g of 85% phosphoric acid, and 5.18g of potassium nitrate into 100mL of deionized water, heat and dissolve at 100°C for 4 hours under constant stirring, and obtain clear and transparent Co-Mo-P-K mixture;

[0085] (2) Dissolving 128.2g of magnesium nitrate in the solution obtained in step (1) to form a Co-Mo-P-K-Mg mixed solution;

[0086] (3) After mixing 142g of silicon dioxide powder and 10g of scallop powder evenly, add the Co-Mo-P-K-Mg mixed solution prepared in step (2), knead and shape, dry at 120°C and roast at 400°C 4h, make catalyst precursor;

[0087] (4) Dissolve 2.66g of chloroplatinic acid in 100mL of deionized water, then put 200g of the catalyst precursor prepared in step (5) into the chloroplatinic acid solution for 2h, filter and dry at 200°C to obtain the catalyst. It is recorded as catalyst H, wherein the contents of Pt, Co, Mo, P, and K are 0.5%, 15%, 2%, 2%, and 1%, respectively...

Embodiment 2

[0089] (1) Add 54.45g of basic cobalt carbonate, 6g of molybdenum oxide, 14.89g of 85% phosphoric acid, and 5.18g of potassium nitrate into 100mL of deionized water, heat and dissolve at 100°C for 4 hours under constant stirring, and obtain clear and transparent Co-Mo-P-K mixture;

[0090] (2) Dissolving 128.2g of magnesium nitrate in the solution described in step (1) to form a Co-Mo-P-K-Mg mixed solution;

[0091] (3) Add the mixed solution prepared in step (2) to the silica sol (473.3g, containing 30% SiO 2 )-ammonia water (40mL) mixed solution, adjust the pH value of the solution to 5-6, continue to stir for 1h after the dropwise addition is complete, and let the precipitate age for 2h;

[0092] (4) Filter and wash the filter cake with deionized water until the conductivity of the washing solution is 10-100 μS / cm;

[0093] (5) Add 10g of squat powder to the filter cake, mix evenly, add 200mL of 5% dilute nitric acid solution, stir and form, dry at 120°C, and roast at 400...

Embodiment 3

[0096] (1) Add 54.45g of basic cobalt carbonate, 6g of molybdenum oxide, 14.89g of 85% phosphoric acid, and 5.18g of potassium nitrate into 100mL of deionized water, heat and dissolve at 100°C for 4 hours under constant stirring, and obtain clear and transparent Co-Mo-P-K mixture;

[0097] (2) Dissolving 128.2g of magnesium nitrate in the solution obtained in step (1) to form a Co-Mo-P-K-Mg mixed solution;

[0098] (3) After mixing 142g of silica powder and 10g of scallop powder evenly, add the Co-Mo-P-Mg mixed solution prepared in step (2), knead and shape, dry at 120°C and roast at 400°C 4h, make catalyst precursor;

[0099] (4) Dissolve 1.64g of platinum nitrate in 100mL of deionized water, then put 200g of the catalyst precursor prepared in step (5) into the platinum nitrate solution for 2h, filter and dry at 200°C to obtain the catalyst. It is recorded as catalyst J, wherein the content of Pt, Co, Mo, P, and K is 0.5%, 15%, 2%, 2%, and 1%, respectively, the content of c...

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Abstract

The invention discloses a catalyst used for preparing ethyl alcohol through acetic acid hydrogenation, wherein the catalyst is low in active component content. The catalyst comprises an active component, a first addition agent, a second addition agent, a third addition agent, a fourth addition agent and a carrier. Based on the mass percent, accounting for the catalyst, of the active component, the ratio of the active component to the four addition agents is 0.1-0.5:5-15:1-5:0.5-2:0.5-2, and the balance is the carrier. The invention further discloses two new preparation methods for the hydrogenation catalyst. The load of the catalyst active component is very low, the reaction conditions of the catalyst are mild, the acetic acid conversion rate and the ethyl alcohol selectivity can reach up to over 98% basically, and the preparation methods are suitable for industrialization and widely used for preparing the ethyl alcohol through acetic acid hydrogenation, and the problem of excess production capacity of acetic acid is solved.

Description

technical field [0001] The invention relates to a hydrogenation catalyst, in particular to a catalyst used for direct hydrogenation of acetic acid to produce ethanol and a preparation method thereof. Background technique [0002] Ethanol has a wide range of uses and can be used to make beverages, flavors, dyes, fuels, etc. Ethanol with a volume fraction of 70%-75% is also commonly used as a disinfectant in medical treatment. Ethanol is a good solvent, which can dissolve many inorganic substances and many organic substances. Ethanol is also commonly used as a reaction solvent to dissolve both organic and inorganic substances participating in the reaction, increase the contact area, and increase the reaction rate. At present, my country's industry mainly produces ethanol through the fermentation of corn, cassava and other grains, and enterprises can only passively bear the losses caused by rising grain prices. Therefore, considering that ethanol production is subject to flu...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/652C07C31/08C07C29/149
Inventor 赵国强陈耀壮赖崇伟王莉应理
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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