Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of technique for preparing dimethyl isophthalate-5-sodium sulfonate

A technology of dimethyl isophthalate and sodium sulfonate, applied in the preparation of sulfonate, organic chemistry and other directions, can solve the problems of many impurities, environmental pollution, difficulty in recycling and treatment, etc.

Active Publication Date: 2016-03-30
SHANDONG JINSHENG NEW MATERIAL TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since sulfur trioxide is used for sulfonation in the production process, the reaction is violent and many impurities are generated, so low-concentration fuming sulfuric acid must be used for sulfonation. The excess sulfuric acid in the sulfonation process will generate a large amount of sodium sulfate, which will be discharged during the neutralization process. The waste water contains a large amount of organic matter and sodium sulfate, which will pollute the environment, and it is difficult to recycle and treat

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
  • A kind of technique for preparing dimethyl isophthalate-5-sodium sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0010] refer to figure 1, the process for preparing dimethyl isophthalate-5-sodium sulfonate is composed of sulfonation kettle A, esterification kettle B, extraction kettle C, stripping kettle D, decolorization gettering kettle E, filter F, intermediate Crystallization kettle G, centrifugal dehydrator H, thermal melting kettle J, fine filter K, terminal crystallization kettle L, secondary dehydrator M, and dryer N are process equipment, which are connected by pipelines to form a production line. Nicotinic sulfuric acid 2 is the main raw material, after the sulfonation process, esterification process, extraction and stripping process, decolorization and impurity removal and filtration process, intermediate crystallization and dehydration process, hot melting and fine filtration process, terminal crystallization dehydration and drying process In the proc...

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

PropertyMeasurementUnit
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention relates to a technique for preparing sodium dimethyl 5-sulfoisophthalate. A sulfonation kettle (a), an esterification kettle (B), an extraction kettle (C), a back washing kettle (D), a decolorization / impurity suction kettle (E), a filter (F), an intermediate crystallizing kettle (G), a centrifugal dehydrator (H), a thermal dissolution kettle (J), a fine filter (K), a terminal crystallizing kettle (L), a secondary dehydrator (M) and a drying machine (N) are used as technological equipment; and m-phthalic acid (1) and fuming sulfuric acid (2) are used as main raw materials. In the technical process of all steps, methanol (4), deionized water (7), a sodium carbonate solution (10), activated carbon (12), oxydol (13), compressed air (14), deionized water (7) and activated carbon (12) are sequentially added into related equipment according to the technical requirements to prepare the sodium dimethyl 5-sulfoisophthalate finished product (27) at specific temperature and time under technological conditions of the technical process of all the steps. The finished product has the advantages of high purity, good quality, low cost and high yield, relieves the environmental pollution, and has favorable economic and social benefits.

Description

technical field [0001] The invention relates to the production process of chemical products, in particular to the technology of extracting useful chemical substances from the production wastewater of three monomers. Background technique [0002] Dimethyl isophthalate-5-sodium sulfonate is commonly known as a three-monomer, which is mainly used to synthesize the third monomer of cationic dyeable polyester, so that the polyester fiber has good affinity for cationic dyes, and can be used for normal dyeing. Pressure dyeing, bright color, complete color spectrum, high color fastness, good antistatic, hygroscopicity, anti-pilling and air permeability, making clothes comfortable to wear. The production method is to sulfonate isophthalic acid first, and then go through methanol esterification, soda ash or caustic soda neutralization, purification and other processes to make products. Since sulfur trioxide is used for sulfonation in the production process, the reaction is violent an...

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 Patents(China)
IPC IPC(8): C07C309/58C07C303/32
Inventor 杨继锋张钦张炎修海涛宋玲玲范鲁涛
Owner SHANDONG JINSHENG NEW MATERIAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products