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Hydrogenation catalyst precursor, hydrogenation catalyst, and preparation methods of hydrogenation catalyst precursor and hydrogenation catalyst

A hydrogenation catalyst and hydroxide technology, applied in the preparation of hydroxyl compounds, the preparation of organic compounds, chemical elements of heterogeneous catalysts, etc., can solve the problems of easy aggregation of active metals, affecting catalyst activity and product conversion rate, etc. The effect of short reaction time, prevention of agglomeration and uniform grain size

Active Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the catalyst is prepared by the impregnation method, the active metal is easy to aggregate, which affects the activity of the catalyst and the conversion rate of the product

Method used

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  • Hydrogenation catalyst precursor, hydrogenation catalyst, and preparation methods of hydrogenation catalyst precursor and hydrogenation catalyst

Examples

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Comparison scheme
Effect test

preparation example Construction

[0032] The preparation process of the hydrogenation catalyst precursor of the present invention is as follows: ammonia gas and metal hydrochloric acid mixed solution are respectively sprayed continuously on the impeller 2 rotating at high speed from the feed ports 4 and 5 provided on the impeller cover, and the slurry produced by the reaction is fed by the impeller 2 The surroundings fall into the reactor, and the generated part of the slurry enters the circulation line 7 through the circulation pipe inlet 6, and the circulating material enters the high-speed rotating impeller 2 from the circulating material outlet 6 provided on the impeller cover 3, and the slurry generated by the reaction flows from the upper part of the reactor. The overflow port 8 is continuously discharged, and the discharged slurry is filtered, washed, and dried to obtain a hydrogenation catalyst precursor, wherein the reaction temperature is controlled at 20~35°C, the residence time is 5~20min, and the pH...

Embodiment 1

[0036] Take 362.4g Cu(NO 3 ) 2 . 3H 2 O, 371.5g Al(NO 3 ) 3 . 9H 2 O, 51.3g Mg(NO 3 ) 2 . 6H 2 O and 80.6g Mn(NO 3 ) 3 . 6H 2 O was prepared into 2800mL of mixed acidic aqueous solution of metal hydrochlorides. The mixed ammonia gas and the acidic mixed aqueous solution of metal hydrochloride are continuously sprayed into the high-speed rotating impeller 2 from the feed ports 4 and 5 provided on the impeller cover respectively, and the resulting slurry falls into the reactor from around the impeller 2, and the resulting part The slurry enters the circulation pipe 7 through the circulation pipe inlet 6, and the circulating material enters the high-speed rotating impeller 2 from the circulating material outlet 6 provided on the impeller cover 3, and the slurry generated by the reaction is continuously discharged from the overflow port 8 at the top of the reactor. The slurry is filtered, and the filtered samples are taken at the reaction 1h and the reaction 7h resp...

Embodiment 2

[0038] Other conditions are the same as in Example 1, except that the diameter of the nozzle is changed to 15 μm, the volume ratio of the circulation amount of the slurry to the feed amount of the acidic mixed solution is 3:1, the pH value of the slurry at the overflow port is 6.5, and the sample is taken for 1 hour of reaction to obtain the catalyst Prebody a 2 and Catalyst A 2 .

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Abstract

The present invention discloses a hydrogenation catalyst precursor, a hydrogenation catalyst, and preparation methods of the hydrogenation catalyst precursor and the hydrogenation catalyst. The hydrogenation catalyst precursor is the mixture of the following metal hydroxides, wherein the metal is Cu, Al and M, M is one or a plurality of materials selected from Ba, Mn, Mg, Ti and Cr, and the particle size distribution (calculated as the volume fraction) of the hydrogenation catalyst precursor is that the particles having a particle size of less than 20 [mu]m account for less than 10%, the particles having a particle size of 20-50 [mu]m account for 65-90%, and the particles having a particle size of more than 50 [mu]m account for less than 25%. According to the present invention, the hydrogenation catalyst prepared from the hydrogenation catalyst precursor is particularly suitable for the 1,4-butanediol preparation through hydrogenation of dimethyl maleate, has characteristics of has high activity and good stability, and is particularly suitable for the method for producing 1,4-butanediol and co-producing tetrahydrofuran and gamma-butyrolactone.

Description

technical field [0001] The invention relates to a hydrogenation catalyst precursor, a hydrogenation catalyst and a preparation method thereof, in particular to hydrogenation of dimethyl maleate to 1,4-butanediol and co-production of tetrahydrofuran and γ-butyrolactone A hydrogenation catalyst precursor, a hydrogenation catalyst and a preparation method thereof. Background technique [0002] 1,4-Butanediol (BDO) is an important organic and fine chemical raw material, which is widely used in the fields of medicine, chemical industry, textile, papermaking, automobile and daily chemical industry. Its downstream derivative products include tetrahydrofuran, polybutylene terephthalate (PBT), gamma-butyrolactone, polyurethane (PU), coatings, plasticizers, etc. In recent years, due to the rapid growth in the demand for thermoplastic elastic fibers and elastomers, the demand for PTMEG (polytetramethylene ether glycol) and PTMG (polytetrahydrofuran ether) as monomers is strong, making...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C31/20C07C29/149C07D307/33C07D307/08
CPCB01J23/002B01J23/72B01J2523/00C07C29/149C07D307/08C07D307/33B01J2523/17B01J2523/31B01J2523/22B01J2523/72B01J2523/67B01J2523/25C07C31/20
Inventor 朱慧红付秋红孙素华金浩杨光杨涛蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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