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Reclaiming and treating method for phenolic aldehyde sewage

A sewage recycling and phenolic technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problem of large changes in process parameters, inability to generate phenolic resin, and complex composition of phenolic resin sewage. and other problems, to achieve the effect of reasonable molecular distribution structure and clear links

Inactive Publication Date: 2010-03-03
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of phenolic resin sewage is complex, the structure of phenolic derivatives presents different states, and the composition of other phenolic sewage is complex
In the original heating polycondensation method, the recyclates in the GPC graph of the recovered phenolic resin appear in a variety of heterogeneous distributions, and stable phenolic resins cannot be produced, nor can they be methylated.
During the use of downstream products, the process parameters change greatly, and products with stable quality cannot be formed

Method used

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  • Reclaiming and treating method for phenolic aldehyde sewage

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Embodiment 1

[0018] The preparation of the primary phenolic resin of embodiment 1 wide distribution

[0019] In the industrialized production process, the sewage is first sent into the reactor, heated to raise the temperature, the content of phenol and formaldehyde is measured, and the ratio of phenol and formaldehyde is adjusted in proportion. Formaldehyde can be divided into two additions, and the total addition amount is preferably phenol: formaldehyde = 1: 0.65-1.05. Polycondensation is divided into two steps, the first step is to add acid, heat 96-100 ℃ polycondensation reflux. At this time, some formaldehyde should be added to make up for the lack of formaldehyde. After the reaction is stable, the phenol content should be measured, and the second formaldehyde should be added. Separators are used to separate the treated sewage into layers. The upper layer is for sewage to be sent to the next process for deep oxygen treatment. The stratified resin is sent to the polymerization react...

Embodiment 2

[0023] The preparation of embodiment 2 advanced phenolic resins

[0024] Step B is to put the phenolic resin of the above embodiment 1 into the reaction kettle, add an acidic catalyst, and adopt the "recovery resin quality control" process technology of polymerization constant temperature, reaction constant speed, and hydroxyl positioning, so that the phenolic resin sewage treatment can recycle the primary phenolic resin Resin, converted into high-grade special phenolic resin. The Mw molecular weight of recovered resins with different structures is stabilized between 3500-3700.

[0025] The recovered resin that enters the reactor is heated to 75-85°C and stirred for 1 hour. After 1.5 hours the temperature was raised to 95°C. Keep it for 20-40 minutes, measure the viscosity according to the ISO2884 standard, if there is no change in the measured viscosity, add an acidic catalyst, the acidic catalyst can be hydrochloric acid, oxalic acid, p-toluenesulfonic acid. The dosages a...

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Abstract

The invention discloses a method for recycling and treating pnenolic aldehyde sewage water. The method is that first preparing widely distributed preliminary formaldehyde-phenol resin, then after catalysis, polymeric fixing temperature, reaction fixing speed and monohydric fixing position, obtaining senior formaldehyde-phenol resin. The Mw molecular weight of the obtained formaldehyde-phenol resinis stabilized between 3500-3700, the interlinkage is clear and the distributing structure of the molecular is reasonable, which can be used in the special fields of fire resistive material, polishingresistive material, forming material and the like.

Description

technical field [0001] The invention relates to the treatment of sewage generated in the production process of phenolic resin, that is to say, the invention relates to a method for recycling and treating phenolic sewage. Background technique [0002] At present, in the recycling and treatment of phenolic sewage, due to the large number of phenolic resin models, different catalysts are used. The composition of phenolic resin sewage is complex, the structure of phenolic derivatives presents different states, and the composition of other phenolic sewage is complex. In the original heating polycondensation method, various heterogeneous distributions appear in the recyclates in the GPC graph of the recovered phenolic resin, and stable phenolic resin cannot be generated, nor can it be methylated. During the use of downstream products, the process parameters vary greatly, and products with stable quality cannot be formed. Contents of the invention [0003] The present invention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/58C02F103/38
Inventor 唐路林孟祥金魏红忠焦秋岭
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD