Unlock instant, AI-driven research and patent intelligence for your innovation.

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., can solve the problems of inability to generate phenolic resin, large changes in process parameters, complex composition, etc. To achieve the effect of clear links and reasonable molecular distribution structure

Inactive Publication Date: 2008-07-09
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
View PDF0 Cites 5 Cited by
  • 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

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
  • Reclaiming and treating method for phenolic aldehyde sewage

Examples

Experimental program
Comparison scheme
Effect test

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, and 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 r...

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. Viscosity was measured according to ISO2884 standard. After 1.5 hours, the temperature was raised to 95°C. Keep it for 20-40 minutes, and measure when there is no change in viscosity. Add acidic catalyst, acidic catalyst can be hydrochloric acid, oxalic acid, p-toluenesulfonic acid. The dosages are: hy...

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 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 resin is 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, polishing resistive 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

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): C02F9/04C02F1/58C02F103/38
Inventor 唐路林孟祥金魏红忠焦秋岭
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD