Method for preparing anhydrous formaldehyde by dehydrogenation of absolute methanol

A technology of anhydrous formaldehyde and anhydrous methanol, applied in the chemical industry, can solve the problems of low formaldehyde selectivity, high reaction temperature, and the use of precious metals

Inactive Publication Date: 2016-06-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are low selectivity of formaldehyde in the above route, poor stability of the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: According to m 铜 :m 锌 =1:5, respectively weigh 0.15g copper nitrate and 0.91g zinc nitrate and dissolve them in 100mL deionized water, place them in a 250mL flask after dissolving, then add 2.00g SiO 2 The carrier powder is uniformly dispersed in the above solution. The flask was placed in an oil bath at 80°C, and 1M Na was added dropwise under vigorous stirring 2 CO 3 The solution was adjusted to a system pH of 8. After aging for 1 hour, it was filtered while hot, washed, and dried overnight. Catalyst 1 was prepared by calcining (550°C, Air, 4h), tableting, crushing, and sieving (40-60 mesh). MicromeriticsASAP2010 physical adsorption instrument was used to measure the specific surface area of ​​the sample. Before the test, the sample was vacuum-processed at 110 and 350°C for more than 3 hours, so that the vacuum degree reached about 10-6torr, and then tested at the temperature of liquid nitrogen (-196°C). The specific surface area was calculated using t...

Embodiment 2

[0018] Example 2: Adjust m 铜 :m 锌 =1:2, respectively weighed 0.38g copper nitrate and 0.91g zinc nitrate and dissolved in 100mL deionized water, and other conditions were the same as Example 1 to prepare catalyst 2. Nitrogen adsorption and desorption experiments show that the specific surface of the material is 75m 2 / g.

Embodiment 3

[0019] Example 3: Adjusting m 铜 :m 锌 =1:1, respectively weighed 0.76g copper nitrate and 0.91g zinc nitrate and dissolved in 100mL deionized water, and other conditions were the same as Example 1 to prepare catalyst 3. Nitrogen adsorption and desorption experiments show that the specific surface of the material is 60m 2 / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The patent of the invention belongs to the technical field of chemical industry, and specifically relates to the preparation and application of a catalyst for preparing anhydrous formaldehyde by direct dehydrogenation of anhydrous methanol. The catalyst uses one or both of copper and zinc oxide as the active ingredient, the corresponding metal salt as the precursor, sodium carbonate, etc. as the precipitating agent, and the sample is prepared by the deposition precipitation method, and then filtered, washed, dried and The catalyst is finally prepared by roasting and other processes. The catalyst prepared by the method shows high activity, selectivity and stability in the process of catalyzing the dehydrogenation of anhydrous methanol to produce anhydrous formaldehyde. At a temperature of 400-600°C, nitrogen is used as a carrier gas, the feed ratio of methanol is in the range of 1-40 vol%, the conversion rate of methanol is 10-90%, and the selectivity of formaldehyde is as high as 60-99%. The preparation process of the catalyst is simple, the cost is low, the catalytic effect is good and the stability is high, and the catalyst has potential industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to the preparation and application of a catalyst for preparing anhydrous formaldehyde by direct dehydrogenation of anhydrous methanol. Background technique [0002] As the simplest aldehyde, formaldehyde is an important organic chemical raw material, widely used in organic synthesis, synthetic materials, coatings and other industries to produce pentaerythritol, paraformaldehyde, phenolic resin, urea-formaldehyde resin, amino resin, etc. . In recent years, with the continuous expansion of people's demand for engineering plastics, dyes and urotropine drugs with excellent performance, the demand for anhydrous formaldehyde has also increased significantly. However, at present, industrially, formaldehyde is mainly prepared by oxidation of methanol, and the obtained formaldehyde contains a large amount of water. In addition, formaldehyde and water easily form azeot...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C47/04C07C45/00B01J23/80
Inventor 王峰李利花徐杰张超锋王业红张健张志鑫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap