CN105037218A - Production process for dodecyl hydroxysulfobetaine - Google Patents

Abstract

The invention relates to a production process for dodecyl hydroxysulfobetaine. According to the production process for the dodecyl hydroxysulfobetaine, dodecyl hydroxysulfopropylbetaine is prepared by dissolving sodium metabisulfite into water, dropwise adding epoxy chloropropane after a solution is clear by precipitating and filtering, adding a solvent and a catalyst, and dropwise adding dodecyl dimethyl tertiary amine, wherein a finished product is a colorless transparent liquid. The production process has the advantages of being perfect and low in cost; the dodecyl hydroxysulfobetaine is the colorless transparent liquid with free amine content reduced by 0.5% and sodium chloride content reduced by 1%; and the product is better in appearance color and higher in purity, and the quality of the finished product is improved.

Description

Dodecyl hydroxy sulfo lycine production technique

Technical field

The present invention relates to sultaine production field, be specifically related to a kind of dodecyl hydroxy sulfo lycine production technique.

Background technology

The dodecyl hydroxy sulfo lycine that traditional technology is produced is micro-yellow liquid, and oil is high from amine content, sodium chloride content is also higher, also do not have technique can realize making dodecyl hydroxy sulfo lycine be water white liquid at present, free amine content reduces by 0.5%, sodium chloride content reduces by 1%, product appearance color is better, and purity is higher.

Summary of the invention

In order to solve the problem, the present invention proposes a kind of dodecyl hydroxy sulfo lycine production technique, perfect technology, realizing product is water white liquid, and free amine content reduces by 0.5%, and sodium chloride content reduces by 1%, product appearance color is better, and purity is higher, improves quality of finished.

In order to reach foregoing invention object, the present invention proposes following technical scheme:

Dodecyl hydroxy sulfo lycine production technique, described dodecyl hydroxyl sulfopropyl betaine is that Sodium Pyrosulfite is dissolved in water, then sedimentation and filtration solution transparent after, drip epoxy chloropropane, then solubilizing agent, add catalyzer, drip with Dodecyl Dimethyl Amine and obtain, finished product is finally colourless transparent liquid.

The dodecyl hydroxy sulfo lycine technological process of production:

The first step: Sodium Pyrosulfite is dissolved in water, then drip with epoxy chloropropane, dropping temperature controls between 55-85, the mol ratio of its reaction is: 1:1.8-1.89, after dropping terminates, insulation 4-6 hour, blowing of then lowering the temperature, the 3-chlorine 2-hydroxypropyl sulfonic acid that crystallization water dumping obtains work in-process powdery is received;

Second step: the 3-chlorine 2-hydroxypropyl sulfonic acid of work in-process powdery is received water-soluble after, with Dodecyl Dimethyl Amine under basic catalyst and organic solvent existent condition, drip, the mol ratio of its reaction is: 1.0-1.01:0.77, range of reaction temperature is: 70 DEG C-90 DEG C, reaction times 6-8 hour, soaking time 4-6 hour, it is colourless transparent liquid that reaction terminates product.

Described organic solvent is ethanol, Virahol.

Advantage of the present invention is perfect technology, and cost is low, and dodecyl hydroxy sulfo lycine is water white liquid, and free amine content reduces by 0.5%, and sodium chloride content reduces by 1%, and product appearance color is better, and purity is higher, improves quality of finished.

Embodiment

Dodecyl hydroxyl sulfopropyl betaine is that Sodium Pyrosulfite is dissolved in water, then sedimentation and filtration solution transparent after, drip epoxy chloropropane, then solubilizing agent, add catalyzer, drip with Dodecyl Dimethyl Amine and obtain, finished product is finally colourless transparent liquid.

The technical process of dodecyl hydroxy sulfo lycine:

The first step: Sodium Pyrosulfite is dissolved in water, then drip with epoxy chloropropane, dropping temperature controls between 55-85, the mol ratio of its reaction is: 1:1.8-1.89, after dropping terminates, insulation 4-6 hour, blowing of then lowering the temperature, the 3-chlorine 2-hydroxypropyl sulfonic acid that crystallization water dumping obtains work in-process powdery is received.

Second step: the 3-chlorine 2-hydroxypropyl sulfonic acid of work in-process powdery is received water-soluble after, with Dodecyl Dimethyl Amine under basic catalyst and organic solvent (such as: ethanol, Virahol) existent condition, drip, the mol ratio of its reaction is: 1.0-1.01:0.77, range of reaction temperature is: 70 DEG C-90 DEG C, reaction times 6-8 hour, soaking time 4-6 hour, it is colourless transparent liquid that reaction terminates product.

The key technical indexes of dodecyl hydroxy sulfo lycine:

Chinese: dodecyl hydroxyl sulfopropyl betaine;

Outward appearance and proterties: colourless transparent liquid;

Specification: 30 ± 2%;

PH value: 6.0-8.0;

Sodium-chlor :≤5%;

Unhindered amina :≤0.5%.

Dodecyl hydroxy sulfo lycine effect: dodecyl hydroxy sulfo lycine (DSB) can produce the abundant fine and smooth foam being better than other betaines tensio-active agent, and there is good cleanup action, effectively can reduce the excitatory of other component in daily chemical products formula system, for shampoo, body lotion, cleaning emulsion, skin care product, as low stimulation in foam type cleansing milk, for shampoo, body wash has foam more better than CAB, more low irritant; It is the tensio-active agent of the high-efficiency low-carbon of real environment-friendly type.

Claims (3)

1. dodecyl hydroxy sulfo lycine production technique, it is characterized in that described dodecyl hydroxyl sulfopropyl betaine is that Sodium Pyrosulfite is dissolved in water, then sedimentation and filtration solution transparent after, drip epoxy chloropropane, then solubilizing agent, add catalyzer, drip with Dodecyl Dimethyl Amine and obtain, finished product is finally colourless transparent liquid.

2. dodecyl hydroxy sulfo lycine production technique according to claim 1, is characterized in that the dodecyl hydroxy sulfo lycine technological process of production:

The first step: Sodium Pyrosulfite is dissolved in water, then drip with epoxy chloropropane, dropping temperature controls between 55-85, the mol ratio of its reaction is: 1:1.8-1.89, after dropping terminates, insulation 4-6 hour, blowing of then lowering the temperature, the 3-chlorine 2-hydroxypropyl sulfonic acid that crystallization water dumping obtains work in-process powdery is received;

Second step: the 3-chlorine 2-hydroxypropyl sulfonic acid of work in-process powdery is received water-soluble after, with Dodecyl Dimethyl Amine under basic catalyst and organic solvent existent condition, drip, the mol ratio of its reaction is: 1.0-1.01:0.77, range of reaction temperature is: 70 DEG C-90 DEG C, reaction times 6-8 hour, soaking time 4-6 hour, it is colourless transparent liquid that reaction terminates product.

3. dodecyl hydroxy sulfo lycine production technique according to claim 2, is characterized in that described organic solvent is ethanol, Virahol.