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

1-bromopropane having low acidity

A technology of bromopropane and alkaline conditions, applied in the field of 1-bromopropane products, can solve problems such as consumption

Inactive Publication Date: 2008-04-30
ALBEMARLE CORP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with these additives is the cost associated with their use and they are consumed when they reduce the acid content in the 1-bromopropane product
The consumption rate of the additive will be such that, after a period of time, there is no additive to further reduce the acid present in the 1-bromopropane product

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
  • 1-bromopropane having low acidity
  • 1-bromopropane having low acidity
  • 1-bromopropane having low acidity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The preparation described in Comparative Example A was followed to form the final 1-bromopropane product. No 2,6-di-tert-butyl-4-methylphenol (BHT) was added during the preparation. 3 rounds of testing were performed to test the efficiency of the stabilizer in the 1-bromopropane product. In rounds 1 and 2, a certain amount of BHT was added to a known amount of 1-bromopropane product; in round 3, butylene oxide (abbreviated BOX in Table 1 below) was added to Added to a known amount of 1-bromopropane product. The stability tests described were performed on all three samples. No 1,2-epoxide appeared in run 1 or 2; no phenol was added in run 3, which is a comparative example. The amount of BHT or butylene oxide (BOX) added to the 1-bromopropane product in each run is listed in Table 1. The results for the 1-bromopropane product initially and after 10 and 30 days at 60°C are summarized in Table 1, expressed as the amount present in the final 1-bromopropane product.

[0...

Embodiment 2

[0071] The preparation described in Comparative Example A was carried out to form the final 1-bromopropane product; in addition, 2,6-di-tert-butyl-methyl Phenol (BHT, 50 kg) was added to the 1-bromopropane product mixture; it was seen by GC that a portion of the BHT (about 1000 ppm) was carried over in the purified 1-bromopropane product at the end of the distillation. At the end of step (5), enough butylene oxide is added to the purified 1-bromopropane product to achieve a butylene oxide concentration of about 450-500 ppm. The area percent detection of BHT in the final 1-bromopropane product by GC represented the presence of approximately 2 ppm BHT. The final 1-bromopropane product was subjected to the above acid test. The results for the 1-bromopropane product initially and after 10 days, 12 days, 25 days and 31 days at 60°C are summarized in Table 2, expressed as the amount present in the final 1-bromopropane product . The final 1-bromopropane product was also tested for...

Embodiment 3

[0077] The preparation described in Example 2 was followed including the addition of butylene oxide to form the final 1-bromopropane product. The amount of BHT added was 8 g of BHT per 1489 g of the 1-bromopropane product mixture; after the distillation step, no BHT was detected in the 1-bromopropane by GC nor was any new one detected in the 1-bromopropane product mixture compound of. The results for the 1-bromopropane product initially and after 10 and 30 days at 60°C are summarized in Table 3, expressed as the amount present in the final 1-bromopropane product. The final 1-bromopropane product was also tested for non-volatile residue as described above and the non-volatile residue was 3 ppm.

[0078] table 3

[0079] At the beginning of the stability test

[0080] * Acidity is reported in ppm HBr.

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 invention provides a method comprising, mixing at least one phenol with a 1-bromopropane product mixture to form a phenol-containing 1-bromopropane product mixture, and obtaining the phenol-containing 1-bromopropane product mixture The purified 1-bromopropane product is recovered from the mixture. The present invention also provides a process for the preparation of a 1-bromopropane product mixture from 1-propanol and hydrogen bromide, characterized in that at least one phenol is mixed with the 1-bromopropane product mixture to form a A 1-bromopropane product mixture of phenol, and a purified 1-bromopropane product recovered from the phenol-containing 1-bromopropane product mixture.

Description

technical field [0001] The present invention relates to 1-bromopropane products having a reduced tendency to form acids during storage, and to methods of producing such products. Background technique [0002] 1-Bromopropane (also known as n-propyl bromide or propyl bromide) can be used as a degreasing agent, especially for degreasing metal parts, and in cleaning solutions in circuit board production. In these applications, the presence of certain impurities in the 1-bromopropane is undesirable because these impurities have detrimental effects on the substrate with which the 1-bromopropane comes into contact. At the time of manufacture, the starting 1-bromopropane product mixture contained impurities including 2-bromopropane (isopropyl bromide), 1,2-dibromopropane, monobromoethylketone, 1-propanol, propionaldehyde, One or more of propionic acid, water and hydrogen bromide (HBr). Some of these impurities degrade over time to produce acids such as HBr and propionic acid. The...

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): C07C17/16C07C17/38
CPCC07C17/16C07C17/395C07C17/38C07C19/075C07C17/42
Inventor 文森特·吕克·米泰尔让-菲利浦·特里茨
Owner ALBEMARLE CORP
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com