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

Integrated Process for Recovery of Metal Catalysts in the Production of High Purity Terephthalic Acid

A production process and catalyst technology, applied in the field of integrated technology, can solve problems such as corrosion

Inactive Publication Date: 2016-08-17
RELIANCE INDUSTRIES LIMITED
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strong acids can cause corrosion throughout the process

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
  • Integrated Process for Recovery of Metal Catalysts in the Production of High Purity Terephthalic Acid
  • Integrated Process for Recovery of Metal Catalysts in the Production of High Purity Terephthalic Acid
  • Integrated Process for Recovery of Metal Catalysts in the Production of High Purity Terephthalic Acid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0055] example 1:

[0056] in the attached figure 1 In a typical device, methyl acetate and water are added to the reaction tower where oxalic acid exists in a weight ratio of 1:5 and stirred. The reaction was continued at 65°C for 30 minutes. After the reaction was complete, the whole mixture was distilled and the oxalic acid was isolated by cooling. The percentages of acetic acid and methanol formed were 55 and 45, respectively.

example 2

[0058] in the attached figure 2 A typical equipment in a is divided into a methyl acetate hydrolysis section and a catalyst recovery unit for a high-purity terephthalic acid (PTA) process. This example follows the steps of Example 1. The 10% oxalic acid solution containing acetic acid is separated by a cooling process and sent to the high purity terephthalic acid catalyst recovery unit where cobalt and manganese are separated as oxalate.

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 present disclosure provides a process for recovering a PTA oxidation catalyst during the production of PTA (high purity terephthalic acid) using an acid catalyst containing a reactant stream obtained by hydrolysis of an organic ester.

Description

[0001] This application is a Patent Supplement to Indian Patent Application 1585 / MUM / 2011 filed on May 27, 2011, the entire contents of which are hereby expressly incorporated by reference. technical field [0002] The present invention relates to an integrated process involving the recovery of metal catalysts in the production of high purity terephthalic acid (PTA) utilizing an acid catalyst containing a reactant stream obtained from the hydrolysis of an organic ester. Background technique [0003] Methyl acetate is produced in large quantities as a by-product of high-purity terephthalic acid (PTA) production plants and polyvinyl alcohol (PVA) production plants. Since methyl acetate is a low-value solvent, methyl acetate is either sold at a low price, or hydrolyzed into methanol and acetic acid with higher value, and a conventional distillation process is required after the hydrolysis reaction. The hydrolytic conversion is not easy to reach equilibrium, and the large amount...

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): C07C51/09C07C51/265C07C51/41C07C51/43C07C53/08C07C55/07C07C63/26C07C63/24
CPCC07C51/09C07C51/265C07C51/412C07C51/43C07C53/08C07C63/24C07C63/26C07C55/07Y02P20/10
Inventor P·V·乌帕拉P·阿杜里T·马修U·拉特纳帕克希A·夏尔马T·乌基尔R·S·加德奇
Owner RELIANCE INDUSTRIES LIMITED
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com