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Method for preparing strong biodegradable surfactant

A surfactant and biodegradation technology, applied in the direction of ether preparation, alkylene oxide preparation ether, chemical instruments and methods, etc., can solve the problems of poor biodegradation performance

Inactive Publication Date: 2012-03-28
常熟耐素生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first technical problem to be solved in the present invention is to provide m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant; It is prepared by reacting alkane; it has been tested by the cobalt thiocyanate method by the National Cleaning Products Quality Supervision and Inspection Center, and the final biodegradation degree on the seventh day is close to 100% according to the national standard GB / T15818-2006 method; it solves the problem of this type of surface activity. The shortcomings of poor biodegradability of the agent, more in line with environmental protection requirements

Method used

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  • Method for preparing strong biodegradable surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant of the present invention has the following molecular structure:

[0038]

[0039] Wherein: R is a 15-carbon unsaturated straight-chain alkyl group; n is 1.

[0040] The preparation method of the above-mentioned m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant comprises the steps:

[0041] 1) Preparation of raw materials

[0042] Raw material A: decarboxylated cashew nut shell crude oil, which contains about 70% m-pentadecylphenol monophenol and about 20% pentadecylphenol bisphenol.

[0043] 2) Preparation of the product

[0044] ①Add raw material A into the reactor, add catalyst NaOH according to 0.5%wt% of raw material A, heat to 95°C, and dehydrate under vacuum for 0.5 hours;

[0045] ②Heat the temperature of the reaction solution to 130°C, feed ethylene oxide at a ratio of 1:1 of the molar ratio of raw material A to ethylene oxide, and keep the temperature at 13...

Embodiment 2

[0050] The m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant of the present invention has the following molecular structure:

[0051]

[0052] Wherein: R is a 15-carbon unsaturated straight-chain alkyl group; n is 5.

[0053] The preparation method of the above-mentioned m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant comprises the steps:

[0054] 1) Preparation of raw materials

[0055] Raw material A: decarboxylated cashew nut shell crude oil, which contains about 70% m-pentadecylphenol monophenol and about 20% pentadecylphenol bisphenol;

[0056] Raw material B: Purify raw material A, whose main component is unsaturated pentadecylphenol, as raw material B; the preparation steps of said raw material B are as follows:

[0057] Add the decarboxylated cashew nut shell crude oil A to the rectification equipment, and rectify at 240°C and a vacuum of 200 Pa to obtain raw material B, in which the purity of unsaturated m-pentadecy...

Embodiment 3

[0068] The m-pentadecylphenol polyoxyethylene ether strong biodegradable surfactant of the present invention has the following molecular structure:

[0069]

[0070] Wherein R is a 15-carbon unsaturated straight-chain alkyl group; n is 15.

[0071] The preparation method of the above-mentioned m-pentadecyl polyoxyethylene strong biodegradable surfactant comprises the steps:

[0072] 1) Preparation of raw materials

[0073] Raw material A: decarboxylated cashew nut shell crude oil;

[0074] Raw material B:

[0075] The preparation steps of the raw material B are as follows: the raw material A is added to rectification equipment, and the raw material B is obtained by rectification at 270°C and a vacuum of 100 Pa, wherein the purity of unsaturated m-pentadecylphenol can reach 97%;

[0076] 2) Preparation of the product

[0077] ①Add raw material B into the reactor, add catalyst KOH according to 0.6%wt% of raw material B, heat to 100°C, and dehydrate under vacuum for 0.6 ho...

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Abstract

The invention discloses a method for preparing a strong biodegradable surfactant, which comprises the following steps of: (1) the preparation of raw materials: a raw materials B is prepared through carrying out molecular distillation / rectification on a raw material A, i.e. decarboxylated cashew nut shell crude oil, and the rest product is a raw material D; and (2) the preparation of a product: (i) the raw material B is added in a reactor, a basic catalyst is added, and the steps of heating and dehydrating under vacuum are carried out, and (ii) a reaction solution is led in epoxy ethane for reaction, then, acetic acid is added to neutralize, and then the step of discharging is carried out so as to obtain the product, i.e. meta-pentadecyl phenol polyoxyethylene strong biodegradable surfactant which comprises the following molecular structure shown as a formula (referred to a drawing), wherein R is a 15-carbon straight-chain alkyl which can be a saturated / unsaturated alkyl, and n is 1-30. The final biodegradability of the surfactant disclosed by the invention approaches to 100% at a seventh day through a cobalt thiocyanate method test and a detection according to the GB / T15818-2006 method which are carried out by the national detergent quality supervision and inspection center, so that the defect that the surfactant has poor biodegradability is overcome, and the surfactant meets the requirements of environmental protection in a greater degree.

Description

[0001] The present invention is a divisional application with the application number 200910090758.8 and the invention name "pentadecylphenol polyoxyethylene ether strong biodegradable surfactant". technical field [0002] The present invention relates to a kind of surface active agent and its preparation method, especially relates to using decarboxylated cashew nut shell crude oil and cardanol extracted from it as raw materials, and using the main component m-pentadecylphenol to react with ethylene oxide to prepare m-decyl Pentaalkylphenol polyoxyethylene ether surfactant and its preparation method. Background technique [0003] Surfactants are a large class of organic compounds. Their properties are very distinctive: they have many excellent functions such as dispersion, wetting, penetration, emulsification, solubilization, and decontamination; they are extremely flexible in application; they can be widely used in detergents and herbicides , Pesticides, plastic additives, e...

Claims

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Application Information

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IPC IPC(8): C07C43/23C07C41/03C08G65/28B01F17/42C09K23/42
Inventor 邵新明迟钝
Owner 常熟耐素生物材料科技有限公司
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