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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 methanol dehydrogenation, to solve the technical problems of high reaction temperature and low conversion rate of methanol in existing catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A process for producing anhydrous formaldehyde by methanol dehydrogenation, preparing a copper-based catalyst, the copper-based catalyst is made of soluble copper salt, titanium-silicon molecular sieve and additives, and 8 kg of soluble copper salt copper nitrate and 80 kg of titanium-silicon molecular sieve are weighed And the nitrate of the additive metal zinc, that is, zinc nitrate 2kg; the soluble copper salt copper nitrate and the additive zinc nitrate are evenly precipitated on the surface of the titanium-silicon molecular sieve carrier, and an acidic modifier is added to it and modified under the action of microwaves. It is 300w, the temperature is controlled at 61°C, the reaction time is 60min, after the reaction is completed, it is dried at 80°C, and air roasted at 400°C to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 301m 2 / g.

[0020] Using methanol as a raw material and inert gas nitrogen as a carrier gas, th...

Embodiment 2

[0023] A process for methanol dehydrogenation to produce anhydrous formaldehyde, preparing a copper-based catalyst, the copper-based catalyst is made of soluble copper salt, titanium-silicon molecular sieve and auxiliary agent, weigh 20kg of soluble copper salt copper chloride, titanium-silicon molecular sieve 80kg and the nitrate of auxiliary metal bismuth, that is, 6kg of bismuth nitrate; the soluble copper salt copper chloride and the auxiliary agent zinc nitrate are uniformly deposited on the surface of the titanium-silicon molecular sieve carrier, and an acidic modifier is added thereto and modified under microwave action. The microwave power is 500w, the temperature is controlled at 80°C, and the reaction time is 100min. After the reaction is completed, it is dried at 100°C and air roasted at 600°C to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 376m 2 / g.

[0024] Using methanol as a raw material and inert gas argon as a ...

Embodiment 3

[0027] A process for methanol dehydrogenation to produce anhydrous formaldehyde, prepare copper-based catalyst, said copper-based catalyst is made of soluble copper salt, titanium-silicon molecular sieve and auxiliary agent, weigh 16kg of soluble copper salt copper sulfate, 80kg of titanium-silicon molecular sieve And 4kg of manganese nitrate as the additive metal manganese nitrate; uniformly precipitate the soluble copper salt copper sulfate and the additive manganese nitrate on the surface of the titanium-silicon molecular sieve carrier, add an acidic modifier to it and modify it under the action of microwaves, the microwave power It is 400w, the temperature is controlled at 70°C, the reaction time is 80min, after the reaction is completed, it is dried at 90°C, and air roasted at 500°C to obtain a copper-based catalyst. After testing, the specific surface area of ​​the catalyst is 351m 2 / g.

[0028] Using methanol as a raw material and inert gas helium as a carrier gas, the...

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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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