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Method for preparing catalyst applied to low-carbon olefin selective oxidization for undersaturation aldehyde preparation

一种选择氧化、低碳烯烃的技术，应用在碳基化合物制备、化学仪器和方法、有机化合物的制备等方向，能够解决催化剂性能变差、催化剂组分不均匀、催化剂高转化率与高选择性高稳定性不能兼得等问题，达到选择性好、活性高的效果

Inactive Publication Date: 2009-11-18
SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the problems in the patents listed above that the catalyst components are not uniform due to the different solubility of the catalyst precursors, thereby deteriorating the performance of the catalyst, and the problems that the high conversion rate of the catalyst cannot be combined with high selectivity and high stability, the present invention aims to In providing an improved catalyst preparation method, by adding a complexing agent in the dissolution process of the catalyst precursor, a catalyst with high activity and good selectivity is obtained, and the oxidation reaction can be carried out under relatively mild conditions, That is to say, the present invention is intended to provide a kind of preparation method of the catalyst that light olefin synthesizes unsaturated aldehyde through selective oxidation reaction

Method used

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  • Method for preparing catalyst applied to low-carbon olefin selective oxidization for undersaturation aldehyde preparation
  • Method for preparing catalyst applied to low-carbon olefin selective oxidization for undersaturation aldehyde preparation
  • Method for preparing catalyst applied to low-carbon olefin selective oxidization for undersaturation aldehyde preparation

Examples

Experimental program
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Effect test

Embodiment 1～5

[0024] Dissolve 1000 grams of ammonium paramolybdate tetrahydrate in 2 liters of distilled water, and record it as solution A; 297.6 grams of bismuth nitrate pentahydrate, 192.6 grams of iron nitrate nonahydrate, 755.5 grams of cobalt nitrate hexahydrate, 27.5 grams of nickel nitrate hexahydrate, Dissolve 9.5 grams of potassium nitrate and 5.5 grams of cesium nitrate in 1.5 liters of distilled water, and record it as solution B. Add solution B to solution A under stirring, and add a complexing agent to the above mixed solution, and continue stirring at 60° C. for 5 hours. Afterwards, the above slurry was transferred to an oven at 100° C. for 18 hours to dry to obtain a dry slurry. Take 70 grams of dry slurry and 30 grams of SiC powder, mix them uniformly, and punch them into hollow columnar particles with an outer diameter of 5 mm, an inner diameter of 2 mm, and a length of 5 mm. The catalyst particles obtained are roasted in air to obtain a composition of 70 (Mo 12 Bi 1.3 F...

Embodiment 6～8

[0032] Dissolve 1000 grams of ammonium paramolybdate tetrahydrate and a certain amount of citric acid in 1 liter of distilled water, and record it as solution A; add an appropriate amount of bismuth nitrate pentahydrate, iron nitrate nonahydrate, cobalt nitrate hexahydrate and other components of the precursor Body salts were dissolved in 1 liter of distilled water, and recorded as solution B. Solution B was added to solution A with stirring, and stirring was continued at 70° C. for 4 hours. Then transfer the above slurry to an oven for 12 hours at 170°C to dry to obtain a dry slurry; take the above dry slurry and mix it with an appropriate amount of heat-conducting agent powder mechanically, and form it into a hollow column with an outer diameter of 5 mm, an inner diameter of 2 mm, and a height of 3 mm. particles, and then put the catalyst particles in the air to roast to obtain the catalyst. When roasting, the volume space velocity of the air relative to the catalyst is 100...

Embodiment 9～10

[0040] Dissolve 1000 grams of ammonium paramolybdate tetrahydrate in 3 liters of distilled water, and record it as solution A; dissolve an appropriate amount of bismuth nitrate pentahydrate, ferric nitrate nonahydrate, cobalt nitrate hexahydrate and other components of the precursor salt and tartaric acid in 0.5 liters of distilled water, recorded as solution B, wherein the molar ratio of tartaric acid to metal ions is 2:1. Solution A was added to solution B with stirring, and stirring was continued at 40° C. for 6 hours. Afterwards, transfer the above slurry to an oven for 24 hours at 70°C to obtain a dry slurry; add a certain amount of heat-conducting agent powder to the above dry slurry, mix it evenly by mechanical means, and slice it into pieces with an outer diameter of 5mm, an inner diameter of 2mm, Hollow columnar particles with a height of 3 mm, and then the hollow particles were calcined in air for 5 hours to obtain a catalyst. Air volume space velocity is 500h durin...

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PUM

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Abstract

The invention provides a method for preparing catalyst containing Mo, Bi, Fe and Co multiple oxide, which is applied to low-carbon olefin selective oxidization for undersaturation aldehyde preparation; the method comprises the following steps: preparing precursor compound of the components for preparing the catalyst into aqueous solution in the presence of organic complexing agent; then drying, molding and roasting to obtain the catalyst. When the catalyst is applied to low-carbon olefin (such as propylene or isobutene / tertiary butyl alcohol) selective oxidization for undersaturation aldehyde preparation, the catalyst features high activity, good selectivity, stable property, and moderate reaction conditions; in addition, the preparation process of the catalyst is simple and feasible, is easy to repeat, thus being suitable for industrialized enlargement.

Description

technical field [0001] The present invention relates to a kind of catalyst used in the chemical reaction process of producing aldehyde with olefin in the field of chemical industry and its preparation process, and also relates to the process of producing aldehyde with this catalyst, in particular to a kind of catalyst used for low The catalyst for the selective oxidation of carbon olefins to prepare unsaturated aldehydes and its preparation method also relates to a process in which the catalyst is used for the selective oxidation of light olefins to prepare unsaturated aldehydes. Background technique [0002] Acrylic acid and methacrylic acid are two important organic chemical products, which are usually prepared by two-step oxidation of the corresponding alkenes. For example, the production of acrylic acid is to selectively oxidize propylene to acrolein, and then continue to oxidize to obtain acrylic acid; the production of methacrylic acid is to use isobutylene or tert-but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883B01J23/882B01J23/881B01J23/843B01J23/78B01J23/80B01J23/889B01J23/835C07C47/21C07C47/22C07C45/34C07C45/35
CPCC07C45/37B01J23/8892B01J21/18B01J23/002C07C45/35B01J23/8876B01J27/224B01J2523/00C07C47/22B01J2523/15B01J2523/43B01J2523/54B01J2523/68B01J2523/842B01J2523/845B01J2523/13B01J2523/72B01J2523/847B01J2523/27B01J2523/14
Inventor 罗鸽温新赵小岐李雪梅庄岩马建学邵敬铭
Owner SHANGHAI HUAYI ACRYLIC-ACID CO LTD
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