DE1443985C3 - Process for the production of light-colored sulfofatty acids or sulfofatty acid derivatives and, if necessary, their salts - Google Patents

Description

to promote by vigorous stirring or similar measures. It is highly recommended that you distribute it to promote the solid bleach in the sulfonation product by diluting the latter with water, e.g., by adding aqueous slurries of the solid bleaches.

The bleached process products can now be converted into their salts in a manner known per se are, if necessary, previously removed excess sulfonating agent.

example

The crude sulfonation product whose processing is described in this example was a hydrogenated gas from Palmkernfettsäureäthylester (JZ = 0.4) by introducing a prepared with a 20-fold amount of air diluted sulfur trioxide at 80 ⁰ C. In the course of one hour, 1.3 moles of sulfur trioxide were added per mole of fatty acid residue; then the reaction product was kept at 80 ° C. for a further 15 minutes and then cooled to room temperature. The sulfonation product had a sulfur trioxide content of about 7.8 percent by weight.

The oxidizing agents given below were used in an amount equal to 3% of the weight of the crude Sulphonation product in the form of 40% aqueous

ίο solutions or slurries stirred in. then the mixture was heated to 60 ° C. and held at this temperature for 1 hour. After that it was neutralized with 10% sodium hydroxide solution. The color values of the neutralized product were with Measured in a ^ 'cell using a Lovibond tintometer. The concentration of the to be measured Solutions were adjusted to 5 percent by weight based on crude acidic sulfonation product.

Bleach

NaBO ₂ -H ₂ O ₂
Na ₂ O ₂

Composition of sulfuric acid in the sulfonation product

° / o SO ₃

64
64

before i after

Reaction with the bleach

% H ₂ O

36
36

VoSO ₃

60

52% H ₂ O

40 48

yellow

2.5
13th

Color values

Red

0.6

2.7

blue

0 0

Claims (4)

1 2 salts by bleaching the sulfonation products of patent claims: fatty acid esters which contain 6 to 28 carbon atoms in the fatty acid residue, but apart from the am 1. Further development of the process for the extraction of light-colored, capillary-active sulfonic acids 5 hydrogen atoms contained in the carbon atom of the fatty acid residue, no further, with sulfur tripartite fatty acid esters and optionally their oxide sulfonable or sulfatable groups, by bleaching the crude sulfonation, with hydrogen peroxide and given products of Fatty acid esters, which in the case of fatty acids neutralize the bleached sulfonation radicals from 6 to 28 carbon atoms, but otherwise ducks. The process is characterized in that, apart from the hydrogen atoms present on the a-carbon atom of the fatty acid esters, no white monohydric alcohols with a sulfur trioxide-containing sulfur trioxide-sulfonatable or inert gas stream in the absence of solvent-sulfatable groups are present, with water - Teln sulfonation peroxide obtained in a manner known per se and optionally neutralization of the bleached sulfonation product at 100 ° C not exceeding temperatures with hydrogen peroxide bleaching or tent 1179 931, whereby one is obtained by treatment with compounds that are prepared under the conditions of Fatty acid esters of monohydric alcohols form hydrogen peroxide with treatment, and with a sulfur trioxide-containing inert gas stream in the concentration of the related hydrogen-absence of solvents in peroxide being chosen so that at the beginning of the bleaching - jek Otherwise obtained sulphonation product "or mathematically considered - the hydrogen peroxide content of the water, which does not exceed 100 ° C, and the hydrogen peroxide present bleaches or swellings formed with excess sulfur trioxide, which do not dilute under the conditions of the handic acid is to form hydrogen peroxide as a 20% swelling, and where the concentration of the hydrogen content used is not lower than the concentration of hydrogen peroxide used and, on the other hand, no lower water than an SO ₃ -H ₂ O mixture of peroxides, so that at the beginning of the bleaching 90 Corresponds to percent by weight SO _{3 content.} The invention relates to a further development of the water content of the hydrogen peroxide and the method of the main patent. This is characterized by the presence of excess sulfur trioxide, that as a compound which is not more dilute than the 3o conditions of treatment hydrogen peroxide contains 20% sulfuric acid and on the other hand that of its salts, its peroxide hydrates and its water content no lower than one Addition compounds to organic substances SO ₃ -H ₂ O mixture of 90 percent by weight SO ₃ - can be used. Content corresponds, thereby marked- As examples are the peroxides of the alkalis and net that one as compounds which among the 35 alkaline earths, in particular the peroxides of sodium, Treatment Conditions Hydrogen Peroxide Potassium, Magnesium, Calcium, Strontium, Ba- form, to name its salts, its peroxydhydrates and riums. To the hydroperoxides of water its addition compounds to organic hydrogen peroxide include those of the borates, carbon Substances are used. nates, orthophosphates, pyro- and polyphosphates, 2. The method according to claim 1, characterized in particular derived from the tripolyphosphates indicates that the oxidizing agent is converted into substances, said compounds being pre-form from aqueous solutions or slurries, preferably sodium or potassium as a cation used, which can be 20 to 80 percent by weight. The addition compounds of the cent oxidizing agent. Hydrogen peroxide to organic substances 3. The method according to claim 1 and 2, characterized 45 hear those of urea or hexamethylene characterized, that you can get treatment at tetramine. Temperatures in the range of 20 to 100 ° C. Most of these substances react with the performs. excess present in the sulfonation product 4. The method according to claim 1 and 3, characterized gene sulfur trioxide or identified with the from the sulfur, that sulfuric acid is formed with the addition of water to the 5 <> trioxide to be bleached crude sulfonation product prior to the addition of the salt formation. This salt formation is for Bleaching agent which, in an amount of 2 to 6%, enables the process according to the invention to be carried out from the weight of the crude sulfonation to be bleached - insignificant as there is excess sulfonating agent application product is to be used, or is available together. with this water added, with the water- 55 The amounts of the amount to be used according to the invention are 4 to 0.25 times the weight of the substances that make up the amount of bleaching agent under the working conditions, and that the conditions hydrogen peroxide are formed, are the im Bleach for 30 to 120 minutes in the case of the main temperature patent, the amounts of hydrogen that are 30 to 80, preferably 40 to superoxide equivalent. Also with regard to the remaining 60 ° C. ^6o working conditions, such as temperature reaction times, dilution of the sulfonation products to be bleached with water, which is When the bleaching agent is used or during the same period, the information in the main patent applies. 65 If the bleaching agent is added in a solid state, The patent 1179 931 describes a method for so it is advisable to distribute this as finely as possible Obtaining light-colored capillary-active sulphonic acids form to process and their uniform distribution Fatty acid esters and, if appropriate, their development in the sulfonation product to be bleached