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Dihydromyrcenol polyoxyethylene ether and synthetic method thereof

A technology of myrcenyl polyoxyethylene ether and dihydromyrcenol, which is applied in the field of dihydromyrcenyl polyoxyethylene ether and its synthesis, can solve the problem of large differences in mud content in sand and gravel, and the anti-contamination of water reducers. Problems such as poor mud and limited use, etc., to achieve the effects of narrow molecular weight distribution, high water reduction rate, and increased growth ratio

Inactive Publication Date: 2014-04-09
SICHUAN SEDAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of product has the following disadvantages: for different regions, the mud content of sand and gravel varies greatly, and this type of water reducing agent is poor in mud resistance, which greatly limits its use in areas with high sand and mud content

Method used

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  • Dihydromyrcenol polyoxyethylene ether and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 624g of dihydromyrcenol and 1.44g of potassium hydroxide solid into a 10L dry spray reactor, replace the air in the kettle with nitrogen for 3 times, raise the temperature to 80°C, and start adding ethylene oxide continuously under vacuum in the reactor Alkanes 1776g, control the flow rate and add in 2 hours, the reaction temperature is 80-120°C. Insulate and ripen until the pressure in the reactor no longer drops, about 1 hour. After the reaction is complete, lower the temperature to 80°C and vacuumize to remove low-boiling substances, then add glacial acetic acid to neutralize to pH 5-7 and discharge to obtain a paste.

Embodiment 2

[0035] Add 624g of dihydromyrcenol and 12.0g of potassium hydroxide solid into a 10L dry spray reactor, replace the air in the kettle with nitrogen for 3 times, raise the temperature to 80°C, and start adding ethylene oxide continuously under vacuum in the reactor Alkanes 1776g, control the flow rate and add in 3 hours, the reaction temperature is at 90-130°C. Insulate and ripen until the pressure in the reactor no longer drops, about 1 hour. After cooling down to 80°C and vacuuming out the low boiling point substances, release 1800g of low molecular weight dihydromyrcenol polyoxyethylene ether, then add 30.0g of potassium hydroxide solid, replace the air in the kettle with nitrogen for 3 times, then heat up to 90- After vacuum dehydration at 120°C for 60 minutes, start to add 2400g of ethylene oxide continuously, control the flow rate for 5 hours and complete the addition, the reaction temperature is 100-150°C, heat preservation and aging until the pressure in the reactor no ...

Embodiment 3

[0037] Add 624g of dihydromyrcenol and 3.6g of potassium hydroxide solid into a 10L dry spray reaction kettle, replace the air in the kettle with nitrogen for 3 times, raise the temperature to 80°C, and start adding ethylene oxide continuously under vacuum in the reaction kettle Alkanes 1776g, control the flow rate and add in 3 hours, the reaction temperature is at 80-100°C. Insulate and ripen until the pressure in the reactor no longer drops, about 1 hour. After cooling down to 80°C and vacuuming out the low boiling point substances, release 1800g of low molecular weight dihydromyrcenol polyoxyethylene ether, then add 9.0g of potassium hydroxide solid, replace the air in the kettle with nitrogen for 3 times, then heat up to 90- After vacuum dehydration at 120°C for 60 minutes, start to add 5400g of ethylene oxide continuously, control the flow rate for 9 hours and complete the addition, the reaction temperature is 90-130°C, heat preservation and aging until the pressure in th...

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Abstract

The invention discloses dihydromyrcenol polyoxyethylene ether and a synthetic method thereof. The dihydromyrcenol polyoxyethylene ether is synthesized from the following raw materials: dihydromyrcenol and ethylene oxide in the mol ratio of 1: (5-150) through two steps, in the presence of a catalyst accounting for 0.03-2% of the total weight of the raw materials dihydromyrcenol and ethylene oxide. The dihydromyrcenol polyoxyethylene ether having a large molecular weight is synthesized through two steps; the product is high in saturability and narrow in molecular weight distribution, and also increased in increase ratio and advantageous for synthesizing products higher in molecular weight. A high-performance polycarboxylic acid water reducing agent prepared from the dihydromyrcenol polyoxyethylene ether provided by the invention has good cement particle dispersity maintaining capability, and remains the advantages such as low dosage, high water-reducing rate, good collapse retaining property and environmental friendless; besides, as the high-performance polycarboxylic acid water reducing agent is enhanced in hydrophobicity in a large monomer structure and increased in molecular steric hindrance, the water reducing agent is remarkably enhanced in adaptability to dinas different in silt content and can be widely applied to high-silt content dinas districts.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to the technical field of polyether synthesis, in particular to a dihydromyrcenol polyoxyethylene ether and a synthesis method thereof. Background technique [0002] Polycarboxylate high-performance water reducer is the third generation of high-performance water reducer developed after the ordinary water reducer represented by wood calcium and the high-efficiency water reducer represented by naphthalene. Among the third-generation high-performance water reducers in my country, polyethylene glycol monomethyl ether (MPEG) and allyl alcohol polyoxyethylene ether (APEG) have gradually been replaced by prenyl alcohol polyoxyethylene ether (TPEG) and isobutylene alcohol polyoxyethylene ether (TPEG). Oxyethylene ether (HPEG) substitution. TPEG and HPEG are currently the most widely used large monomers of high-efficiency water-reducing agents in my country with better comprehensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
Inventor 王琦翟艳利
Owner SICHUAN SEDAR CHEM
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