Process for producing anhydrous formaldehyde by dehydrogenation of methanol

An anhydrous formaldehyde and methanol technology, applied in the chemical industry, can solve the problems of low methanol conversion rate and high catalyst reaction temperature, and achieve the effects of improving conversion rate, increasing specific surface area, and reducing the content of extra-framework titanium

Inactive Publication Date: 2017-09-15
册亨荣畅化工科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a process for the production of anhydrous formaldehyde by metha

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example one

[0019] A process for producing anhydrous formaldehyde by methanol dehydrogenation. A copper-based catalyst is prepared. The copper-based catalyst is made of soluble copper salt, titanium silicon molecular sieve and auxiliary agents. Weigh 8 kg of soluble copper salt copper nitrate and 80 kg titanium silicon molecular sieve As well as the nitrate of zinc nitrate as the auxiliary agent, zinc nitrate 2kg; the soluble copper salt copper nitrate and the auxiliary zinc nitrate are uniformly precipitated on the surface of the titanium silicon molecular sieve carrier, and the acidic modifier is added to it and modified under the action of microwave, microwave power It is 300w, the temperature is controlled at 61℃, the reaction time is 60min, after the reaction is completed, it is dried at 80℃ and calcined in air at 400℃ to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 301m 2 / g.

[0020] Using methanol as the raw material...

Example Embodiment

[0022] Example two

[0023] A process for the production of anhydrous formaldehyde by methanol dehydrogenation. A copper-based catalyst is prepared. The copper-based catalyst is made of soluble copper salt, titanium silicon molecular sieve and additives. Weigh 20 kg of soluble copper salt copper chloride and titanium silicon molecular sieve 80kg and the auxiliary metal bismuth nitrate, namely bismuth nitrate 6kg; the soluble copper salt copper chloride and the auxiliary zinc nitrate are uniformly precipitated on the surface of the titanium silicon molecular sieve carrier, and the acid modifier is added to it and modified under the action of microwave, The microwave power is 500w, the temperature is controlled at 80℃, and the reaction time is 100min. After the reaction, it is dried at 100℃ and calcined in air at 600℃ to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 376m. 2 / g.

[0024] Using methanol as the raw material and the inert g...

Example Embodiment

[0026] Example three

[0027] A process for the dehydrogenation of methanol to produce anhydrous formaldehyde. A copper-based catalyst is prepared. The copper-based catalyst is made of soluble copper salt, titanium silicon molecular sieve and additives. Weigh 16 kg of soluble copper salt copper sulfate and 80 kg of titanium silicon molecular sieve And the nitrate of metal manganese as the auxiliary agent, namely manganese nitrate 4kg; the soluble copper salt copper sulfate and the auxiliary manganese nitrate are uniformly precipitated on the surface of the titanium silicon molecular sieve carrier, and the acidic modifier is added to it and modified under the action of microwave, microwave power It is 400w, the temperature is controlled at 70℃, and the reaction time is 80min. After the reaction is completed, it is dried at 90℃ and calcined in air at 500℃ to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 351m. 2 / g.

[0028] Using methan...

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Abstract

The invention belongs to the technical field of chemical industry, and in particular relates to a process for producing anhydrous formaldehyde by dehydrogenation of methanol, a soluble copper salt and an additive are homogeneously precipitated on the surface of a titanium silicon molecular sieve carrier, after cooling, an acid modifier is added for modification under microwave effect, and after the completion of the reaction, the anhydrous formaldehyde is obtained by drying and air roasting. The methanol is used as a raw material, and an inert gas is used as a carrier gas. The reaction is carried out in a fixed bed reactor. A copper based catalyst is filled in a reaction tube, and the reaction tube is sent to the reactor for reaction. Through the acid modification under the microwave effect, the synergistic effect of the Cu base and the titanium silicon molecular sieve can be effectively enhanced, the dispersion of the catalyst is significantly increased, the titanium content outside the framework of the molecular sieve is reduced, and the effective framework titanium content is increased.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a process for producing anhydrous formaldehyde by dehydrogenating methanol. Background technique [0002] Formaldehyde is the simplest aldehyde in the aliphatic series. It has very active chemical properties and can be used to synthesize a variety of compounds. It is one of the important basic chemical raw materials, widely used in chemical industry, medicine, dyestuff and agriculture and other fields. Most of them are used as raw materials for urea-formaldehyde resins, phenolic resins and amino resins, and secondly for the production of chemical products such as polyoxymethylene, trimethylolpropane, pentaerythritol, urotropine, pyridine and isoprene. Formaldehyde can also be used as Synthetic spices, synthetic explosives, synthetic chelating agents, synthetic auxiliary agents and synthetic important intermediates, etc. [0003] Industrial production of formaldehyde m...

Claims

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Application Information

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IPC IPC(8): C07C45/00C07C47/04B01J29/89
CPCC07C45/002B01J29/89B01J37/035B01J37/346B01J2229/18B01J2229/37C07C47/04
Inventor 杨春显
Owner 册亨荣畅化工科技发展有限公司
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