Preparation method for acyclic compound used as foaming agent

A technology of cyclic compounds and foaming agents, which is applied in the field of preparation of acyclic compounds, can solve the problems of complex components, many by-products, and restrictions on flotation indicators, and achieve the effects of optimized flotation performance, short reaction time, and mild reaction conditions

Inactive Publication Date: 2014-05-28
张炜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another example is that some new synthetic agents (such as patent numbers CN1106784A and CN1180702A) have too many complex by-products, and there is no effective parameter index to verify the performance, which greatly restricts the improvement of flotation index

Method used

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  • Preparation method for acyclic compound used as foaming agent
  • Preparation method for acyclic compound used as foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 is the reaction route diagram for the synthesis of novel blowing agents. combine figure 1, generating final products (such as dipropoxyl-ethoxypropanol) including:

[0030] Step 1: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #1 reactor respectively, and stir until the sodium hydride is completely dissolved. Then 160.8g of dipropylene glycol was gradually added into the solution, and the reactants were reacted for two hours at 0°C to generate sodium dipropylene glycol;

[0031] Step 2: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #2 reactor respectively, and stir until the sodium hydride is completely dissolved. Then, 72g of 1-propanol was gradually dropped into the solution, and the reactants were reacted for two hours at 0°C to generate sodium 1-propoxide;

[0032] Step 3: After two hours, gradually add 310g of 1,2-diiodoethane into #2 reactor, raise the temperature and keep it at 60°C, and react with sodium 1-pro...

Embodiment 2

[0040] Similar to the synthetic process of Example 1, the target product in this example is tripropoxy-ethoxypropanol. The generation steps include:

[0041] Step 1: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #1 reactor respectively, and stir until the sodium hydride is completely dissolved. Then, 230.4 g of tripropylene glycol was gradually added into the solution, and the reactants were reacted for two hours at 0° C. to generate sodium tripropylene glycol;

[0042] Step 2: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #2 reactor respectively, and stir until the sodium hydride is completely dissolved. Then, 72g of 1-propanol was gradually dropped into the solution, and the reactants were reacted for two hours at 0°C to generate sodium 1-propoxide;

[0043] Step 3: After two hours, gradually add 310g of 1,2-diiodoethane into #2 reactor, raise the temperature and keep it at 60°C, and react with sodium 1-propoxide in tetrahydrofuran s...

Embodiment 3

[0048] Similar to the synthetic process of Example 1, the target product in this example is tripropoxy-ethoxypentanol. The generation steps include:

[0049] Step 1: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #1 reactor respectively, and stir until the sodium hydride is completely dissolved. Then, 230.4 g of tripropylene glycol was gradually added into the solution, and the reactants were reacted for two hours at 0° C. to generate sodium tripropylene glycol;

[0050] Step 2: Add 20L of tetrahydrofuran solvent and 48g of sodium hydride into #2 reactor respectively, and stir until the sodium hydride is completely dissolved. Next, 105.6 g of 1-pentanol was gradually dropped into the solution, and the reactants were reacted for two hours at 0° C. to generate sodium 1-pentoxide;

[0051] Step 3: After two hours, gradually add 310g of 1,2-diiodoethane into #2 reactor, raise the temperature and keep it at 60°C, and react with sodium 1-pentoxide in tetrahydrof...

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Abstract

The invention belongs to the technical field of a mineral flotation preparation and discloses a method and approach for preparing a novel foaming agent. The method for preparing the foaming agent comprises the following eight steps in all (di-propoxy-ethoxy propanol is used as an example): 1, performing the reaction on dipropylene glycol and sodium hydride to generate sodium dipropylene glycol; 2, performing the reaction on 1-propanol and sodium hydride to generate 1-sodium propoxide; 3, performing the reaction on 2-diiodoethane and 1-sodium propoxide to generate 1-(2-iodoethoxy) propane; 4, performing the reaction on the sodium dipropylene glycol and the 1-(2-iodoethoxy) propane to generate a compound using the di-propoxy-ethoxy propanol as a main body; 5, removing a residual tetrahydrofuran solvent; 6, carrying out impurity removal and purification on the product by using a dialysis membrane; 7, carrying out concentration on the product; 8, purifying the product to obtain the di-propoxy-ethoxy-propanol with the purity of 99.96 percent. Compared with other commercial foaming agents widely and industrially applied, the foaming agent prepared through the method disclosed by the invention has relatively obvious advantages and characteristics on the aspects of fluid dynamics parameters and related flotation performance.

Description

technical field [0001] The invention belongs to the technical field of mineral flotation preparations, and in particular relates to a preparation method of several acyclic compounds containing hydroxyl and connecting carbon atoms used as foaming agents and having good hydrodynamic characteristic values. Background technique [0002] Froth flotation is a beneficiation method that uses air bubbles to transport hydrophobic ore particles from the depth of the pulp to the surface of the pulp, and further purifies them in the foam layer to improve the grade of the concentrate. It can be seen that the generation of ore particle carrier-bubbles with appropriate size and lifespan is an important way to improve the efficiency of flotation equipment and mineral processing indicators. In the flotation process, the addition of an important class of surfactant-foaming agent, which enables the air bubbles in the aerated flotation pulp to attach to the selectively floating mineral particles...

Claims

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Application Information

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IPC IPC(8): C07C43/11C07C41/01B03D1/008B03D101/04
CPCC07C41/16B03D1/008B03D2201/04C07C43/11C07C43/12
Inventor 张炜
Owner 张炜
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