Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for formaldehyde catalyst through adopting iron molybdenum method and methanol oxidation

A catalyst, oxidation technology, used in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor catalyst stability, low formaldehyde selectivity, etc.

Pending Publication Date: 2018-11-16
常州新日催化剂股份有限公司
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of the catalyst prepared by this method is relatively poor, and the selectivity of formaldehyde is not high

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for formaldehyde catalyst through adopting iron molybdenum method and methanol oxidation

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] A method for preparing a formaldehyde catalyst by iron-molybdenum method methanol oxidation, the catalyst preparation method comprising the steps of:

[0022] (1) Step 1: Control the temperature of the reactor at 80°C-150°C, the pressure at 0.1MPa-0.8MPa, and the stirring speed at 100r / min-250r / min, and remove 1.2-1.5Kg molybdenum salt with 20Kg 50-90°C Ionized water is configured as 0.22-0.28mol / L molybdenum salt solution, 0.5-0.8Kg iron salt and 5Kg 50-90°C deionized water are configured as 0.56-0.89mol / L iron salt solution, and then added in parallel with a metering pump The precipitation reaction is carried out in the reaction kettle. During the reaction process, the pH of the system is controlled at 1.0-6.0, and the reaction time is controlled at 1h-3h. Stop after 2h-4h to obtain slurry;

[0023] (2) Step 2: Wash the slurry with deionized water, then filter with a filter press, and continue to wash the filter cake with deionized water for 2-7 times to obtain a qua...

Embodiment 1

[0036] Control the temperature of the reaction kettle at 110°C-135°C, the pressure at 0.15MPa-0.5MPa, and the stirring speed at 100r / min-250r / min, and add the prepared molybdenum salt solution and iron salt solution into the reaction kettle in parallel with a metering pump Carry out precipitation reaction, control the pH of the system at 1.8-3.5 during the reaction process, and control the reaction time at 1h-3h. After the co-current precipitation reaction is completed, continue to maintain the above reaction temperature, pressure and stirring speed for the crystallization reaction of precipitation, 2h-4h After stopping, a slurry was obtained. Filter the slurry with a stainless steel filter to obtain the filter cake and filtrate, wash the filter cake with deionized water 3 times to obtain the washed filter cake, dry the washed filter cake in a drying oven at 100-150°C for 8 hours to obtain the catalyst activity Precursor.

Embodiment 1-1

[0038] Mix 2-4% of the total amount of lubricant into the active precursor, pulverize and mix evenly, and the mixed material is pressed into shape with a rotary tablet press, and the size is (4.0-4.5mm*4.0-5.0mm*1.5- 2.5mm) hollow cylinder, the hollow cylinder was activated at 350°C-380°C for 4 hours to obtain the finished catalyst FMAL-1-1.

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 invention relates to the technical field of manufacture of formaldehyde catalysts, and particularly to a preparation method for a formaldehyde catalyst through adopting an iron molybdenum method and methanol oxidation. The preparation method for the formaldehyde catalyst through adopting the iron molybdenum method and methanol oxidation includes the following steps: step I: slurry preparation;step II, filter cake preparation; step III, precursor preparation, step IV, smashing, step V, pressing and step VI, preparation of a finished product. According to the preparation method for the formaldehyde catalyst through adopting the iron molybdenum method and methanol oxidation, the hydro-thermal synthesis reaction is carried out at higher temperature and pressure, so as to obtain the precursor with uniform grain sizes and larger grain sizes, and the catalyst prepared through adopting the precursor can be used for methanol oxidation for preparation of the formaldehyde, and in the reaction, high activity and selectivity are obtained.

Description

technical field [0001] The invention relates to the technical field of formaldehyde catalyst manufacture, in particular to a method for preparing a formaldehyde catalyst by iron-molybdenum oxidation of methanol. Background technique [0002] Formaldehyde is an important organic chemical raw material and one of the important derivatives of methanol, with a production capacity of about 35 million tons this year, and has become a chemical product that is produced and consumed on a large scale. The industrial production methods of formaldehyde are divided into silver method and iron-molybdenum method according to the catalyst type. The advantages of the iron-molybdenum method in the production process have attracted widespread attention. [0003] Methanol oxidation to formaldehyde iron-molybdenum catalyst is the reaction of methanol and excess air to form formaldehyde at a temperature of 300-350 ° C. The conversion rate of methanol is high and the content of formic acid is low. ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/881C07C45/38C07C47/54
CPCB01J23/881C07C45/38C07C47/54
Inventor 刘先国魏士新邹红旭王康军宋大朋
Owner 常州新日催化剂股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com