Preparation method and applications of alkyl phosphite

A technology of alkyl phosphite and phosphorus trichloride, which is applied in the field of alkyl phosphite, can solve the problems of high medicament cost, low yield, complex synthesis process of alkyl phosphoric acid, etc., and achieve low raw material cost and high production process Simple and convenient for industrial production

Active Publication Date: 2014-07-16
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkyl phosphonic acid with appropriate carbon chain length is an effective flotation collector for wolframite, cassiterite ore, phosphate ro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a kind of preparation method of alkyl phosphite, its steps are as follows:

[0021] (1) Add fatty alcohol and water into the reaction kettle, the ratio of the amount of the two substances is, alcohol: water = 1:1.5, slowly add phosphorus trichloride solution dropwise at room temperature and keep stirring, the amount of the added substances is Ratio is, alcohol: phosphorus trichloride=1:1, react 2~6 hours at 30 ℃ after phosphorus trichloride dropwise; Described fatty alcohol is C 6 ~C 18 straight-chain fatty alcohols, phencyclic fatty alcohols or mixed alcohols with different carbon chains;

[0022] (2) Add caustic alkali at 30°C and keep stirring. The ratio of the amount of substances added is alcohol: alkali = 1: 3.5. After adding caustic alkali, react at 30°C for 0.5-1.5 hours to obtain the product.

Embodiment 2

[0023] Embodiment 2, a kind of preparation method of alkyl phosphite, its steps are as follows:

[0024] (1) Add fatty alcohol and water into the reaction kettle, the ratio of the amount of the two substances is, alcohol: water = 1: 3.0, slowly add phosphorus trichloride solution dropwise at room temperature and keep stirring, the amount of the added substance is Ratio is, alcohol: phosphorus trichloride=1: 1.5, react 2~6 hours at 90 ℃ after phosphorus trichloride dropwise; Described fatty alcohol is C 6 ~C 18 straight-chain fatty alcohols, phencyclic fatty alcohols or mixed alcohols with different carbon chains;

[0025] (2) Add caustic alkali at 90°C and keep stirring. The ratio of the amount of substances added is alcohol: alkali = 1: 5.0. After adding caustic alkali, react at 60°C for 0.5-1.5 hours to obtain the product.

Embodiment 3

[0026] Embodiment 3, a kind of preparation method of alkyl phosphite, its steps are as follows:

[0027] (1) Add fatty alcohol and water into the reaction kettle, the ratio of the amount of the two substances is, alcohol: water = 1:2.0, slowly add phosphorus trichloride solution dropwise at room temperature and keep stirring, the amount of the added substance is Ratio is, alcohol: phosphorus trichloride=1:1.2, react 2~6 hours at 40 ℃ after phosphorus trichloride dropwise; Described fatty alcohol is C 6 ~C 18 straight-chain fatty alcohols, phencyclic fatty alcohols or mixed alcohols with different carbon chains;

[0028] (2) Add caustic alkali at 40°C and keep stirring. The ratio of the amount of substances added is alcohol: alkali = 1: 3.8. After adding caustic alkali, react at 35°C for 0.5-1.5 hours to obtain the product.

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PUM

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Abstract

The invention relates to a preparation method of alkyl phosphite. The prepared alkyl phosphite can be used for a non-sulfide ore floatation collecting agent. The preparation method comprises the following steps: firstly adding fatty alcohol and water into a reaction kettle, slowly dropwise adding phosphorus trichloride at room temperature and continuously stirring, and reacting at 30DEG C-90DEG C after the dropwise addition of phosphorus trichloride is completed, wherein the fatty alcohol is linear-chain fatty acid alcohol of C6-C18, benzene ring fatty alcohol or different carbon chains of mixed alcohol; adding caustic alkali at 30DEG C-90DEG C and continuously stirring, and reacting for 0.5-1.5 hours at 30DEG C-60DEG C after stopping adding of the caustic alkali, thus obtaining the alkyl phosphate. The method for preparing alkyl phosphite is simple in production technology, low in the cost of raw materials, convenient for industrial production, and aiming at different types of ores, different alkyl phosphite can be prepared by changing raw materials fatty alcohol.

Description

technical field [0001] The invention relates to a preparation method of mineral flotation reagent alkyl phosphite and the use of the alkyl phosphite prepared by the method. Background technique [0002] my country is rich in mineral resources, but most of them are low-grade and difficult-to-select minerals. With the continuous mining and utilization, the mineral resources are gradually showing the characteristics of poverty, fineness and miscellaneous, which has caused great difficulties for the development and utilization of my country's mineral resources. Finding and developing efficient flotation reagents is the key to solving this problem. Among many reagents, alkyl phosphoric acid has been widely used in the field of flotation because of its special structure. It is an important class of flotation collectors. . Alkyl phosphonic acid with appropriate carbon chain length is an effective flotation collector for wolframite, cassiterite, phosphate rock and rare earth ore, ...

Claims

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Application Information

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IPC IPC(8): C07F9/142C07F9/141B03D1/014B03D101/02B03D103/04
Inventor 刘养春宋文义刘升林
Owner BLUESTAR LEHIGH ENG INST CO LTD
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