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

Synthetic method for preparing dibutyltin dilaurate

A kind of technology of dibutyltin cinnamate, synthesis method

Inactive Publication Date: 2015-06-03
JIANGSU XINLU CHEM NEW MATERIAL
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned improved processes have their own advantages, but there are generally problems such as many preparation steps and the use of many solvents and additives, which increase the production cost to a certain extent.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1

[0026] Add 700g of benzene in the reactor as a solvent, then add 400.6g of lauric acid and 303.8g of dibutyl tin dichloride, control the reaction temperature at 35°C, and drop 300g of tripropylamine under normal pressure for 3.5 hours until the material pH=7.5 when the reaction ends.

[0027] Add 230 g of water and 15 g of hydrochloric acid into the reactor, and separate and collect the aqueous layer solution when the pH of the aqueous layer after standing and stratifying is 6.5.

[0028] Heat the material to 50°C to evaporate the solvent. When there is no more solvent distilled out in the distillation condenser, stop vacuuming and heating, and control the vacuum pressure to an absolute pressure of 0.009MPa.

[0029] Filter the distilled product to obtain the product dibutyltin dilaurate.

[0030] The product dibutyltin dilaurate synthesized by the present embodiment has a yield of 85.1%.

Embodiment 2

[0032] In the reactor, add 840g sherwood oil as solvent, then add 400.6g lauric acid and 303.8g dibutyl tin dichloride, control reaction temperature 30 ℃, drop 220g dipropylamine in 3 hours under normal pressure, to material pH= At 7:00 the reaction ended.

[0033] Add 200 g of water and 18 g of hydrochloric acid into the reactor, and separate and collect the aqueous layer solution when the pH of the aqueous layer after standing and stratifying is 6.

[0034] Heat the material to 40°C to evaporate the solvent. When there is no more solvent in the distillation condenser, stop vacuuming and heating, and control the vacuum pressure to an absolute pressure of less than 0.008MPa.

[0035] Filter the distilled product to obtain the product dibutyltin dilaurate.

[0036] The product dibutyltin dilaurate synthesized by the present embodiment has a yield of 89.4%.

Embodiment 3

[0038] In the reactor, add 800g benzene as solvent, then add 400.6g lauric acid and 303.8g dibutyl tin dichloride, control reaction temperature 30 ℃, drop 230g triethylamine in 4 hours under normal pressure, to material pH= At 8 o'clock the reaction ended.

[0039] Add 230 g of water and 15 g of hydrochloric acid into the reactor, and separate and collect the aqueous layer solution when the pH of the aqueous layer after standing and stratifying is 7.

[0040] Heat the material to 50°C to evaporate the solvent. When there is no more solvent in the distillation condenser, stop vacuuming and heating, and control the vacuum pressure to an absolute pressure of less than 0.007MPa.

[0041] Filter the distilled product to obtain the product dibutyltin dilaurate.

[0042] The product dibutyltin dilaurate synthesized by the present embodiment has a yield of 88.6%.

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 synthetic method for preparing dibutyltin dilaurate. The synthetic method comprises the following step: by taking lauric acid and dibutyltin dichloride as raw materials, performing synthetic reaction under the action of a solvent under the condition that a molar ratio of lauric acid to dibutyltin dichloride is 2:1. The synthetic method is characterized in that a catalyst is also added in a synthetic process, wherein the catalyst is any one or a mixture of any two of tripropylamine, triethylamine and dipropyl amine, or is a mixture of tripropylamine, triethylamine and dipropyl amine. According to the synthetic method for preparing dibutyltin dilaurate disclosed by the invention, dust raw materials are not involved, an alkalization process can be eliminated, washing wastewater can be recycled, and the discharge quantity of wastewater can be reduced; the cyclic utilization efficiency can be improved, and the production cost can be reduced; and moreover, the synthetic method is simple in production equipment, ensures that reaction and separation can be completed by using a single kettle (reactor), and ensures that the cost can be saved.

Description

technical field [0001] The invention relates to a synthesis method for preparing dibutyltin dilaurate, which belongs to the field of organic synthesis. Background technique [0002] Dibutyltin dilaurate is an organotin additive. Dibutyltin dilaurate is a light yellow or colorless oily liquid at room temperature and formed at low temperature. White crystal, can be used in PVC plastic additives, has excellent lubricity, transparency, and weather resistance. Good resistance to sulfide pollution. It can be used as a stabilizer in soft transparent products, as a high-efficiency lubricant in hard transparent products, and can also be used as a catalyst for the crosslinking reaction of acrylate rubber and carboxyl rubber, the synthesis of polyurethane foam and polyester, room temperature vulcanized silicone rubber catalyst. [0003] The current general synthesis process is: use tetrabutyltin and tin tetrachloride as raw materials to react to obtain dibutyltin dichloride, then di...

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): C07F7/22
Inventor 不公告发明人
Owner JIANGSU XINLU CHEM NEW MATERIAL
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