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Process for the preparation of acetylated derivatives of starchy materials

A kind of acetylated derivatives, acetylated technology, applied in food and/or ink composition, elasticity, solid composition of acetylated derivatives, medicine, adhesive, thermoplastic preparation field, can solve problems such as acetic acid distillation

Active Publication Date: 2016-08-31
ROQUETTE FRERES SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, when the starchy acetylated derivatives have a high DS, to the applicant's knowledge, in a continuous process for the production of acetylated derivatives of starchy materials, it has hitherto not been possible to convert the acetic acid trapped in the viscous phase to almost fully distilled

Method used

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  • Process for the preparation of acetylated derivatives of starchy materials
  • Process for the preparation of acetylated derivatives of starchy materials
  • Process for the preparation of acetylated derivatives of starchy materials

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preparation example Construction

[0019] A first subject of the invention is a process for the continuous preparation of solid compositions of acetylated derivatives of starchy materials, comprising the following steps:

[0020] a) a step in which the reaction of acetylating the starchy material with acetic anhydride and / or acetic acid is carried out in the presence of a catalyst so as to obtain a reaction medium in the form of a sticky mass of the acetylated starchy material,

[0021] b) the optional step of neutralizing the catalyst,

[0022] c) a step of evaporating the reaction medium, in particular solidifying said reaction medium, and

[0023] d) A step of recovering the reaction medium thus depleted of acetic acid and solidified.

[0024] In the present study, applicants have noted that acetylated derivatives of starchy materials are soluble in acetic acid and / or acetic anhydride above a threshold DS corresponding to a DS of at least greater than 1.6.

[0025] For the purposes of the present invention...

Embodiment 1

[0138] Example 1: Preparation of acetylated starch by a method involving LIST CRP and comparison with conventional methods

[0139] Processing:

[0140] Potato flour: 1800g anhydrous+33g water (1.8% moisture content)=1833g,

[0141] Acetic anhydride: 3400 g (3 equivalents, i.e. relative to 100 mol % of starch, to obtain a theoretical DS of 3) + 187 g (excess to compensate for the amount consumed by hydrolysis) = 3587 g

[0142] Acetic acid: 680g,

[0143] Catalyst: methanesulfonic acid: 18g,

[0144] Total mass: 6118g

[0145] reaction

[0146] Acetic anhydride, acetic acid, potato flour and catalyst were transferred to a LIST Co-Rotating-Processor (CPR) 10-batch reactor / stirrer / evaporator sold by the company LIST SA. The reaction was carried out at 130°C for 1 hour and 20 minutes. During this step, the potato flour changes from a heterogeneous suspension to a homogeneous medium.

[0147] Next, a solution of 16.33 g of sodium acetate in acetic acid was introduced into...

Embodiment 2

[0168] Example 2: Production of potato-based Powdered Maltodextrin Acetate:

[0169] Step 1: React

[0170] Combine the following ingredients:

[0171] 42.55 kg of maltodextrin based on potato flour with a maximum DE of 5 and a moisture content of 6%, i.e. 40 kg dry weight,

[0172] 90kg acetic anhydride,

[0173] 8kg sodium acetate,

[0174] cold added to

[0175]Double jacket 1m equipped with IKA Turbotron RFG06 agitator and full reflux condenser system 3 Reactor with the condenser having a heat transfer fluid adjusted to 18°C.

[0176] The thermal regulation set point was set at 80°C. The reaction medium goes from 13°C to 81°C in 14 minutes and then from 81°C to 135°C in 1 minute. The reaction was maintained for 26 minutes. The temperature of the reaction crude product increased from 135°C to 131°C, then decreased from 131°C to 122°C over 2 minutes, and then stabilized.

[0177] During the reaction, the reaction medium boils vigorously with the bulk liquid stre...

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Abstract

The present invention relates to a continuous process for the preparation of acetylated derivatives of starchy materials. The invention also relates to a solid composition of at least one acetylated derivative of starchy material obtained by said method. The invention also relates to the use of said composition for the preparation of thermoplastic, elastic, viscous, pharmaceutical and / or ink compositions.

Description

technical field [0001] The present invention relates to a continuous process for the preparation of acetylated derivatives of starchy materials. The invention also relates to a solid composition of at least one acetylated derivative of starchy material obtained by said process. The present invention relates to the use of said composition for the preparation of thermoplastic, elastic, adhesive, pharmaceutical, food and / or ink compositions. Background technique [0002] Starch is a mixture of two polymers, amylose and amylopectin, formed from D-glucose units interconnected by α-(1-4) and α-(1-6) linkages, the latter linkage causing branched chains in the molecular structure. Amylose is a relatively linear glucose polymer, while amylopectin is a branched polymer. The ratio between the amounts of the two polymers depends on the source of the starch. [0003] Acetylated derivatives of starchy materials are used in various fields, especially food, pharmaceuticals, fibers, mono...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor C·凯捷
Owner ROQUETTE FRERES SA