摘要:
This process for the manufacture of an aqueous solution of (meth)acryloyloxyethylbenzyl-dimethylammonium chloride ((M)ADAMQUAT BZ) by reaction, in the presence of water, of N,N-dimethylaminoethyl (meth)acrylate ((M)ADAME) with benzyl chloride is characterized in that the reaction is carried out continuously in a reactor operating according to the perfectly stirred reactor technology.
摘要:
A compound (I) is prepared by reaction of at least one (meth) acrylate (II) with a heterocyclic alcohol (III), in the presence of at least one catalyst chosen from the chelates of calcium with 1,3-dicarbonyl compounds, such as calcium acetylacetonate. ##STR1## R.sup.1 =H, CH.sub.3 ; A, B=C.sub.2 -C.sub.5 alkylene; R.sup.2 =C.sub.1 -C.sub.4 alkyl.
摘要:
The invention concerns a method for preparing (meth)acrylic esters or anhydrides from acrylic acid of formulae (I), where R is H or Me, and R′ is alkyl and R″ is alkyl or ethyl substituted by dialkylamino whereof the alkyls can form with the nitrogen atom, a 5- or 6-membered heterocycle, capable of bearing one or several alkyl substituents. OII or ═O, or R′ is H and R″ is alkyl, the alcohol R″—OH being primary or secondary; or (II) wherein R′ is H or Me, functioning preferably in the presence of at least one catalyst, wherein is performed a reaction in a reaction R2 with constant equilibrium displacement provided with a first reactor R1 designed for prior dehydration of the reagents to be involved in the reaction.
摘要:
The invention concerns a method for making aqueous solutions of unsaturated quaternary ammonium salts of formula (I) by reacting, in the presence of water, N,N-dimethylaminoethyl acrylate with a quaternizing agent of formula (II): R—Cl, said method is characterized in that it consists in: (a) in a closed reactor containing 5 60 wt. % of N,N-dimethylaminoethyl acrylate required for the reaction and which has been pressurized with air or depleted air at 0.5 to 3 bars, carrying out the reaction by continuously introducing, at a temperature ranging between 35 to 65° C., the quaternizing agent (II), and water, and finally the remaining N,N-dimethylaminoethyl acrylate, until the desired concentration of salt (I) in the water is reached, the water being introduced only when 0–20 wt. % of the amount required for the quaternizing agent (II) reaction has been added; the introduction of the remaining N,N-dimethylaminoethyl acrylate starting only when 20–80 wt. % required for the quaternizing agent (II) reaction has been added; and the pressure at the end of the reaction capable of reaching 9 bars; then (b) in depressurizing while maintaining the oxygen content constant by simultaneous introduction of air and, after returning to atmospheric pressure, eliminating the residual quaternizing agent. In formule (I) and (II). R=methyl or benzyl.
摘要:
This process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the formula (I), by reaction, in the presence of water, of N,N-dimethylaminoethyl acrylate (DAMEA) with a quaternizing agent of formula (II), is characterized in that the said reaction is carried out continuously in a rotating disc agitated column, with introduction of the quaternizing agent in the column bottom and introduction of the DAMEA and the water in the column top, the said reaction being carried out at a temperature of 35 to 60° C. and under a pressure of 10 to 20 bar. R—Cl (II) R=methyl or benzyl radical.
摘要:
A compound (I) is prepared by reacting at least one (meth)acrylate (II) with a heterocyclic alcohol (III), in the presence of a catalyst consisting of a mixture formed (a) of at least one magnesium alkoxide and (b) of a component chosen from the chelates of calcium with 1,3-dicarbonyl compounds, dialkyltin oxides, dialkyltin alkoxides and dialkyltin diesters. ##STR1## R=C.sub.1 -C.sub.4 alkyl. R.sup.1 =H, CH.sub.3 ; A, B=straight or branched C.sub.2 -C.sub.5 hydrocarbon chain; R.sup.2 =C.sub.1 -C.sub.4 alkyl.
摘要:
The present invention relates to a process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts. The salts can correspond to the following formula (I): in which R represents a methyl or benzyl radical, by reaction, in the presence of water, of N,N-dimethyl-amninoethyl acrylate (DAMEA) with a quaternizing agent of formula (II): R—Cl (II) in which R is as defined above. Generally, the reaction is carried out in a closed reactor, which includes all the DAMEA and has been pressurized by air or depleted air to 0.5 to 3 bar, by continuously introducing, at a temperature of 35 to 65° C., the quatenlizing agent (II) and the water, until a concentration of salt (I) in the water is obtained. The water starts to be introduced beginning when 0-20% of the amount by weight of the quaternizing agent (II) necessary for the reaction has been added and it being possible for the pressure at the end of the reaction to reach 9 bar. Next, the reactor can be depressurized while keeping the oxygen content constant by simultaneous introduction of air and, after returning to atmospheric pressure, the residual quaternizing agent may be removed.
摘要:
A compound (I) is prepared by reacting at least one (meth)acrylate (II) with a heterocyclic alcohol (III), in the presence of at least one catalyst chosen from magnesium alkoxides Mg(OR).sub.2. ##STR1## R=C.sub.1 -C.sub.4 alkyl. R.sup.1 =H, CH.sub.3 ; A, B=straight or branched C.sub.2 -C.sub.5 hydrocarbon chain; R.sup.2 =C.sub.1 -C.sub.4 alkyl.
摘要:
The invention relates to special (methyl)acrylaic monomers and concerns more particularly an enhanced process for preparing solutions of alkylimiozolidone (meth)acrylates in water solutions of alkylimidazolidone (meth)acrylates in a light (meth)acrylate.
摘要:
To prepare compound (I), a quaternising agent R3—X⊖ is introduced into a solution, in an organic solvent or a mixture of organic solvents, of a compound of formula (III), at a temperature of 35 to 80° C., and the reaction is then allowed to continue at said temperature until compound (III) has disappeared completely or substantially completely, after which water is added and then an aqueous solution of compound (I) is separated and the water removed as necessary. R1=H or —CH3; R2=one of —CH3, —C2H5, —C3H7 and —C4H9; the two R3 are the same or different and each represents one of —CH3, —C2H5, —C3H7, —C4H9 and —CH2C6H5; and the two X⊖ are the same or different and each represents Cl⊖ or Br⊖.
摘要翻译:为了制备化合物(I),在35℃的温度下将季铵化物R 3 -X'引入式(III)化合物的有机溶剂或有机溶剂的混合物的溶液中 至80℃,然后使所述反应在所述温度下继续,直到化合物(III)完全或基本上完全消失,然后加入水,然后分离出化合物(I)的水溶液,并除去水 R 1 = H或-CH 3; R 2 = -CH 3,-C 2 H 5,-C 3 H 7和-C 4 H 9之一; 两个R 3相同或不同,各自表示-CH 3,-C 2 H 5,-C 3 H 7,-C 4 H 9和-CH 2 C 6 H 5中的一个; 两个X <⊖>相同或不同,分别表示Cl <⊖>或Br <⊖>。