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Green, safe and environment-friendly device and method for industrial continuous large-scale production of formaldehyde-free aqueous adhesive

A water-based adhesive, safe and environmentally friendly technology, used in combination devices, adhesive types, chemical instruments and methods, etc., can solve the production goals that do not meet the reaction principle of atomic economy, are not suitable for continuous large-scale production, and are disadvantageous. Continuous large-scale production and other problems, to achieve the effect of improving molecular weight and polymerization conversion rate, reducing evaporation heat consumption, and avoiding explosion

Active Publication Date: 2021-12-31
新元化学(山东)股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the polymer preparation process, solvent precipitation combined with centrifugation or filtration separation is used, and centrifuges or filters are used for solid-liquid separation, which not only produces a large amount of solid-liquid mixed solvent, but also has a high pressure for separation and recovery. The mother liquor contains a considerable proportion of low-molecular-weight polymers, which cannot be reused, resulting in a large amount of hazardous waste, which does not conform to the reaction principle of atomic economy and the production goal of green chemistry, and is not suitable for industrial continuous large-scale production
[0005] In summary, there is an urgent need to develop a green, safe and environmentally friendly production device, which is suitable for the industrialized continuous large-scale production of aldehyde-free water-based adhesives, and solves the problem of using centrifuges or filters to generate hazardous waste, which is not conducive to continuous large-scale industrialization. production problem

Method used

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  • Green, safe and environment-friendly device and method for industrial continuous large-scale production of formaldehyde-free aqueous adhesive
  • Green, safe and environment-friendly device and method for industrial continuous large-scale production of formaldehyde-free aqueous adhesive
  • Green, safe and environment-friendly device and method for industrial continuous large-scale production of formaldehyde-free aqueous adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] A green, safe and environment-friendly production device for an aldehyde-free water-based adhesive, which includes three parts: a polymerization reaction system, a solvent recovery system, and an ammoniation reaction system;

[0076] The polymerization reaction system includes a raw material metering tank, and the raw material metering tank is connected with a tubular reactor 9 through a dissolution mixing tank 6;

[0077] Described solvent recovery system comprises that spray drying tower 17 is connected, and described tubular reactor 9 is connected with spray drying tower 17 by feed kettle 14; Described spray drying tower 17 top is passed electric heater 32 and steam heater 31 is connected with the gas-liquid separator 28, and the bottom of the spray drying tower 17 is connected with the spray drying tower receiving tank 18; the steam heater 31 is also connected with the inert carrier gas pipeline, and the bottom of the gas-liquid separator 28 is connected with the raw...

Embodiment 2

[0080] The green safety environment-friendly production device of the non-aldehyde water-based adhesive described in embodiment 1, difference is:

[0081] The raw material metering tank described in the polymerization reaction system includes a maleic anhydride metering tank 1, a styrene metering tank 2, a diene monomer metering tank 3, a solvent metering tank 4, and a recovery solvent tank 5, which are respectively connected to a dissolution mixing tank 6.

[0082] The dissolution mixing tank 6 described in the polymerization reaction system is connected to the tubular reactor 9 through the feed pump 7 and the preheater 8 respectively. Preheating the mixed raw materials in the dissolution mixing tank 6 through the preheater 8 is more beneficial to the polymerization reaction.

[0083] The tubular reactor 9 is arranged in series with 2 to 10 stages of tubular reactors. The multi-stage tubular reactors are arranged in series, which is beneficial to prolong the reaction residen...

Embodiment 3

[0089] The green, safe and environment-friendly production device of the aldehyde-free water-based adhesive as described in embodiment 2, the difference is:

[0090] In the solvent recovery system, the feed tank 14 is connected to the spray drying tower 17 through a metering pump 16;

[0091] Described spray drying tower 17 is also connected with gas-liquid separator 28 by primary cyclone separator 19, secondary cyclone separator 21, induced draft fan 23, spray washing tower 24 and condenser 27, and gas-liquid separator 28 is connected Connect with steam heater 31 through blower 30; This setting can make the vaporized component (mainly solvent) and inert carrier gas in spray drying tower 17 carry a small amount of dust, and pass through primary cyclone separation 19, secondary cyclone separation 21 successively , for solid particle separation;

[0092] The first-level cyclone separator 19 and the second-level cyclone separator 21 are respectively connected with the first-leve...

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Abstract

The invention relates to a green, safe and environment-friendly device and method for industrial continuous large-scale production of a formaldehyde-free aqueous adhesive. The device comprises a polymerization reaction system, a solvent recovery system and an ammonification reaction system. The method comprises three steps of polymerization reaction, solvent recovery and ammonification reaction. The polymerization reaction system adopts a circulation loop technology, and the reaction is controlled through a tubular reactor; the solvent recovery system adopts inert gas N2 or CO2 for circulating spray drying; and the ammoniation reaction system adopts a powdery material gas-solid continuous ammoniation process, and ammonia gas is diluted by air. The green, safe and environment-friendly production process of the formaldehyde-free water-based adhesive has the advantages of being green, safe, environment-friendly, simple in process, mild in reaction condition, good in atom economy and the like, full-process automatic control can be achieved, labor is saved, and the method is suitable for continuous industrial production of the formaldehyde-free water-based adhesive.

Description

technical field [0001] The invention relates to the technical field of adhesives for wood-based panels, in particular to a green, safe and environment-friendly production device for aldehyde-free water-based adhesives. Background technique [0002] In the current wood-based panel production, "trialdehyde glue" (urea-formaldehyde resin, phenolic resin and melamine-formaldehyde resin) prepared from formaldehyde occupies a large proportion, exceeding 80%. The boards using "trialdehyde glue" will release free formaldehyde for a long time, pollute the indoor environment, and seriously threaten the health of residents. With the improvement of people's living standards, the consumption concept of green ecology is increasingly recognized, and more and more attention is paid to the environmental protection and health of the home environment. The formaldehyde emission of panel products has become a matter of great concern to consumers. Only higher standards of environmental protection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/24B01J19/18B01D53/18B01D53/14B01D50/00B01D1/18C08F222/08C08F212/08C08F212/36C08F232/08C09J135/06
CPCB01J19/242B01J19/18B01D1/18C08F222/08C09J135/06B01D53/18B01D53/1406B01D2257/406C08F212/08C08F212/36C08F232/08Y02P70/10
Inventor 解乐福邵军强苗晓亮刘晓敏丛飞周建民赵伟洁
Owner 新元化学(山东)股份有限公司
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