Continuous process for producing a tenside in a tube reactor

A surfactant and catalyst technology, applied in chemical instruments and methods, preparation of carboxylic acid amides, preparation of organic compounds, etc., can solve the problems of wide residence time, high content of subcomponents, high heat load, etc., and achieve narrow residence time Effects of distribution, shortened reaction time, increased space-time yield

Active Publication Date: 2017-08-01
CLARIANT INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process has the disadvantage of a broad residence time distribution, which leads to an increasing formation of undesired by-products
Due to the large reaction volume in the reaction system and the associated unfavorable temperature distribution, the heat load is too high, which negatively affects the color of the product
[0007] The method also has the disadvantage of a strong foaming during the removal of the co-biont
Foam formation results in low pressures that may not be achieved for complete removal of commensals
In order to ensure the removal of co-growths, higher temperatures or lower throughputs must be used, which results in a higher temperature load of the final product
However higher temperature loads lead to higher content of secondary components and worse color

Method used

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  • Continuous process for producing a tenside in a tube reactor
  • Continuous process for producing a tenside in a tube reactor
  • Continuous process for producing a tenside in a tube reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Cocoyl Glucamide from Aqueous N-Methyl Glucamine and Coconut Oil

[0037] An N-methylglucamine melt at a temperature of 135°C was prepared from an aqueous solution of N-methylglucamine and sodium hydroxide by means of a thin-film evaporator operated continuously at 145°C. The melt was mixed with a coconut oil melt (Gustavheess (Material No.: 204403)) at a temperature of 40°C by means of a static mixer at 130°C. The mixture was buffered in a continuously stirred reactor and then reacted in a tubular reactor. The residence time was 35 minutes in the stirred reactor and 11 minutes in the tubular reactor. The temperature was 130°C in the stirred vessel and 100°C in the tubular reactor. The product produced can be discharged at the end of the tubular reactor without further processing.

Embodiment 2

[0038] Example 2: Cocoyl Glucamide from Aqueous N-Methyl Glucamine and Coconut Oil Using a Phase Transfer Material

[0039] An N-methylglucamine melt at a temperature of 135°C was prepared from an aqueous solution of N-methylglucamine and sodium hydroxide by means of a thin-film evaporator operated continuously at 145°C. The melt, propylene glycol and coconut oil melt (Gustavheess (Material No.: 204403)) at a temperature of 40°C were mixed by a static mixer at 130°C. The mixture was buffered in a continuously stirred reactor and then reacted in a tubular reactor. The residence time was 25 minutes in the stirred reactor and 8 minutes in the tubular reactor. The temperature was 100°C in the stirred vessel and 95°C in the tubular reactor. The product produced can be discharged at the end of the tubular reactor without further processing.

Embodiment 3

[0040] Example 3: Oleyl Glucamides from Aqueous N-Methyl Glucamine and Sunflower Oil

[0041] A dry N-methylglucamine melt was prepared from an aqueous N-methylglucamine solution cascaded with sodium hydroxide through two series of stirred tanks operated continuously at 135°C. The melt was mixed with a propylene glycol additive and sunflower oil (Cargill (Agripur AP88, material number: 233301 )) at a temperature of 80°C by means of a static mixer at 120°C. The mixture was buffered in a continuously stirred reactor and then reacted in a tubular reactor. The residence time was 55 minutes in the stirred reactor and 21 minutes in the tubular reactor. The temperature was 110°C in the stirred vessel and 100°C in the tubular reactor. The product produced can be discharged at the end of the tubular reactor without further processing.

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PUM

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Abstract

The invention relates to a continuous method for producing a tenside, containing a compound of the formula (1), wherein R2 is a fatty acid alkyl residue and R1 is a linear or branched C1 to C12 hydrocarbon residue, and x is in the range from 1 to 15 by conversion of fatty acid alkyl esters or fatty acid triglycerides having an N-n-alkylized polyhydroxy compound in the presence of an alkali catalyst or a catalyst selected from hydroxides or alcoholates of the 2nd and 4th secondary group of the periodic system at a temperature in the range from 40 to 300 DEG C.

Description

technical field [0001] The present invention relates to a continuous process for the preparation of surfactants, especially polyhydroxy fatty acid amides such as N-methylglucamide, in a tubular reactor. Surfactants can, for example, be used as surface-active substances, for example in detergent formulations. The method according to the invention allows the continuous production of surfactants in high yield and purity. Background technique [0002] For use in detergent formulations, personal care products and plant protection, a large number of nonionic surfactants exist. An alternative to many conventional surfactants are polyhydroxy fatty acid amides, which are valuable and frequently used surface active compounds. [0003] Thus, the polyhydroxy fatty acid amides can be used, for example, alone or in admixture with anionic, cationic and / or nonionic surfactants as cleaners, detergents, fabric treatments, etc., and in the form of solid products (e.g. powders, granules , pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C233/18C07C233/20
CPCC07C231/02C07C233/18C07C233/20B01J19/1812B01J19/242B01J2219/24C07C231/00
Inventor J·阿佩尔D·海特曼S·维尔纳
Owner CLARIANT INT LTD
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