Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
  • C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
  • C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
  • C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
  • C07C229/10—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
  • C07C229/16—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of hydrocarbon radicals substituted by amino or carboxyl groups, e.g. ethylenediamine-tetra-acetic acid, iminodiacetic acids
• • C—CHEMISTRY; METALLURGY
  • C05—FERTILISERS; MANUFACTURE THEREOF
  • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
  • C05D9/00—Other inorganic fertilisers
  • C05D9/02—Other inorganic fertilisers containing trace elements
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
  • C07C227/38—Separation; Purification; Stabilisation; Use of additives
  • C07C227/40—Separation; Purification
  • C07C227/42—Crystallisation
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/33—Amino carboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
  • C11D7/22—Organic compounds
  • C11D7/32—Organic compounds containing nitrogen
  • C11D7/3245—Aminoacids
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
  • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
  • C07B2200/13—Crystalline forms, e.g. polymorphs
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2602/00—Systems containing two condensed rings
  • C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
  • C07C2602/04—One of the condensed rings being a six-membered aromatic ring
  • C07C2602/12—One of the condensed rings being a six-membered aromatic ring the other ring being at least seven-membered

Definitions

• Complexing agents for alkaline earth and heavy metal ions are usually synthesized in aqueous solution. For certain applications, they are needed in solid form.
• Conventional processes for the production of solids from solutions are, in particular, crystallization and spray-drying processes. It is known that crystalline solid, as obtained, for example, in evaporation or cooling crystallization process, can contain water of crystallization and is usually less hygroscopic and storage stable under ambient conditions than amorphous solid.
• the solid is obtained amorphously by spray-drying methods (eg in the spray tower or in the spray fluidized bed).
• the solid is often highly hygroscopic and in open storage under ambient conditions, it loses the flowability within a short time. Therefore, measures are described in the literature to increase the storage stability of spray powder, for. B. the compaction or post-treatment of builders for detergents with benzoic acid in US 3,932,316.
• Glycine-N, N-diacetic acid derivatives as complexing agents for alkaline earth and heavy metal ions in various industrial applications are known from WO 94/29421.
• These glycine-N, N-diacetic acid derivatives e.g. B. ⁇ -alanine-N, N-diacetic acid (MGDA) in the form of the trisodium salt, crystallize greatly inhibited, so that conventional crystallization processes are not possible or not economical.
• the aftertreatment of amorphous spray powder of these compounds with additives, eg. B. benzoic acid according to US 3,932,316 is not desirable for some applications and can only improve the storage stability to a limited extent. The stability of a crystalline solid is not achieved.
• the object of the present invention was therefore to provide a virtually non-hygroscopic, stable, preferably crystalline solid of essentially glycine-N, N-diacetic acid derivatives, which is substantially free of additives.
• the present invention relates to a process for producing a preferably crystalline solid which is e.g. for processing and application preferably has a sufficiently low hygroscopicity and substantially glycine-N, N-diacetic acid derivatives of the general formula I comprises
• R is C 1 - to C 30 -alkyl or C 2 - to C 30 -alkenyl, which additionally have substituents of up to 5 hydroxyl groups, formyl groups, C 1 -C 4 -alkoxy groups, phenoxy groups or C 1 -C 4 Carry alkoxycarbonyl groups and by up to 5 non-adjacent oxygen atoms can be interrupted, alkoxylate groups of the formula
• a 1 and A 2 independently of one another, denote 1, 2-alkylene groups having 2 to 4 C atoms, Y is hydrogen, C x - to Ci 2 alkyl, phenyl or Ci- to C 4 alkoxycarbonyl and k is the number 1, 2 or 3 and m and n are each independently of the other numbers from 0 to 50, wherein the sum of m + n is at least 4, phenylalkyl groups having 1 to 20 carbon atoms in the alkyl, a five- or six-membered unsaturated or saturated heterocyclic ring having up to three heteroatoms from the group nitrogen, oxygen and sulfur, which may be additionally benzanellated, all at The meanings for R mentioned phenyl nuclei and heterocyclic rings can additionally carry as substituents up to three Ci to C 4 alkyl groups, hydroxyl groups, carboxyl groups, s
• A is a C 1 - referred to C 2 -alkylene bridge or a chemical bond
• each M independently of one another represents hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium (eg organic amine salts) in the corresponding stoichiometric amounts, which is characterized in that at least one crystalline compound of the formula I is initially introduced as a seed, and spray granulation (preferably in a granulator) with at least one compound of the formula I is carried out.
• germs produced (Alternatively, these germs can also be presented). These germs are in a fluidized bed in the
• the particles produced in this way can be made flexible by a classifying discharge - e.g. with freely adjustable particle sizes - are continuously removed without interrupting the drying process from the drying room.
• a classifying discharge e.g. with freely adjustable particle sizes - are continuously removed without interrupting the drying process from the drying room.
• the process of the present invention is characterized in that at least one preferably crystalline compound of the formula I is initially introduced as germs and then in a conventional manner a spray granulation with at least a compound of formula I, preferably in solution (in particular in aqueous solution, for example about 40%), is performed.
• a spray granulation is carried out with the following parameters:
• Preferred inlet air temperature 90-160 0 C
• preferred exhaust air temperature 40-110 0 C
• preferred product temperature 40
• preferred temperature of the spraying air 70-110 0 C, more preferably at pressure of spraying air: 1-6 bar, preferred temperature of the spray solution: 50-95 0 C.
• liquid raw material for example a 40% aqueous solution of a compound of formula I
• the hot air stream swirling crystal nuclei of compounds of formula I
• This process is preferably operated continuously, wherein preferably a portion of the product is continuously withdrawn from the granulator, which is then treated with an additional annealing step (heat treatment step).
• heat treatment step As a result, the hygroscopicity of the product is lowered, preferably by increasing the crystalline content in the product.
• the product thus treated is the final product, again preferably a part is ground and is introduced as new germs back into the granulator.
• the product with the following temperature profile
• the granulator is preferably a fluidized bed spray granulator equipped, for example, with a cyclone and / or a filter.
• crystalline preferably refers to a crystalline content of at least -60% by weight.
• Consistency as (preferably free-flowing) powder or granules preserved.
• the preferably crystalline solid prepared according to the invention essentially comprises compounds of the formula I, wherein small amounts of starting materials and / or by-products from the preparation of the glycine-N, N-diacetic acid derivatives I may additionally be present.
• Usual purities for the Compounds I are, depending on the synthesis method used, at 70 to 99.9 wt .-%, in particular 80 to 99.5 wt .-%, each based on the solids content.
• the crystalline starting substance can be prepared, for example, by the process described in DE 196 49 681.
• the process according to the invention is preferably suitable for those compounds I in which R is C 1 - to C 2 o-alkyl, C 2 - to C 20 -alkenyl or a radical of the formula
• their alkali metal, ammonium and substituted ammonium salts are preferably used.
• Particularly suitable salts of this type are the sodium, potassium and ammonium salts, in particular the trisodium, tripotassium and triammonium salts, and organic triamine salts having a tertiary nitrogen atom.
• organic amine salts underlying bases are in particular tertiary amines, such as trialkylamines with 1 to 4 C
• Atoms in the alkyl such as trimethyl- and triethylamine
• Trialkanolamines having 2 or 3 C atoms in the alkanol radical preferably triethanolamine, tri-n-propanolamine or triisopropanolamine, into consideration.
• alkaline earth metal salts in particular the calcium and magnesium salts are used.
• the radical R as a straight-chain or branched alk (en) yl, especially C 2 - to C 7 alkyl and alkenyl, particularly linear, derived from saturated or unsaturated fatty acids residues into consideration.
• radicals R are: ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, tert.
• Ci to Ci 2 alkylene bridges A are in particular, polymethylene the formula (CH 2) k / k wherein denotes a number from 2 to 12, especially from 2 to 8, that is 1,2-ethylene, 1, 3 - Propylene, 1,4-butylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, nonamethylene, decamethylene, undecamethylene and dodecamethylene. Hexamethylene, octamethylene, 1,2-ethylene and 1,4-butylene are included particularly preferred.
• Ci 2 alkylene groups may occur, for. B. -CH 2 CH (CH 3 ) CH 2 -, -CH 2 C (CH 3 ) 2CH 2 -, -CH 2 CH (C 2 H 5 ) - or CH 2 CH (CH 3 ) -.
• the C 1 - to C 30 -alkyl and C 2 - to C 30 -alkenyl groups may carry up to 5, in particular up to 3, additional substituents of the type mentioned and may be interrupted by up to 5, in particular up to 3, non-adjacent oxygen atoms.
• Examples of such substituted alk (en) yl groups are -CH 2 OH, -CH 2 CH 2 OH, -CH 2 CH 2 -O-CH 3 , -CH 2 CH 2 -O-CH 2 CH 2 -O-CH 3 , -CH 2 -O-CH 2 CH 3 , -CH 2 -O-CH 2 CH 2 -OH, -CH 2 -CHO, -CH 2 -OPh, -CH 2 -COOCH 3 or -CH 2 CH 2 - COOCH 3 .
• Suitable alkoxylate groups are, in particular, those in which m and n are each independently of the other from 0 to 30, especially from 0 to 15.
• a 1 and A 2 are preferably of butylene oxide and especially of propylene oxide and ethylene oxide derived groups. Of particular interest are pure ethoxylates and pure propoxylates, but also ethylene oxide-propylene oxide block structures may occur.
• Suitable five- or six-membered unsaturated or saturated heterocyclic rings having up to three heteroatoms from the group consisting of nitrogen, oxygen and sulfur, which may additionally be benzanellated and substituted by the radicals mentioned, are:
• N-H-groups in said heterocyclic rings should preferably be in derivatized form, such as N-alkyl moiety.
• phenylalkyl groups and heterocyclic ring bearing alkyl groups for R are benzyl, 2-phenylethyl, 3-phenylpropyl, 4-phenylbutyl, o-, m- or p-hydroxylbenzyl, o-, m- or p-carboxylbenzyl, o-, m- or p-sulfobenzyl, o-, m- or p-methoxy or -ethoxycarbonylbenzyl, 2-furylmethyl, N-methylpiperidin-4-ylmethyl or 2-, 3- or 4-pyridinylmethyl.
• water-solubilizing groups such as hydroxyl groups, carboxyl groups or sulfo groups preferably occur.
• the crystalline solid prepared according to the invention is particularly suitable as a component for solid washing and cleaning agent formulations. Therefore, solid detergents and cleaning formulations which contain the crystalline solid of the invention with sufficiently low hygroscopicity from glycine-N, N-diacetic acid derivatives I as complexing agents for alkaline earth and heavy metal ions in the amounts customary therefor, among other conventional constituents of such formulations, Subject of the present invention. Compositions and customary constituents of such solid washing and cleaning agent formulations are known to the person skilled in the art and therefore need not be discussed further here.
• the starting material (Trilon M ® liquid from BASF AG) was heated under continuous and intensive mixing at 90 0 C and used for the granulation at this temperature. In the following conditions, a stable granulation process was achieved:
• the product prepared was post-treated with a temperature profile starting with a bed temperature of 70 0 C, which was then increased to about 110 - 120 ° C within about one hour and then held at this temperature for about 60 minutes has been.

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