Übersetzung für "Säure und base" in Englisch

This type of reaction occurs, for example, in redox and acid-base reactions.

Buffers are aqueous solutions of a weak acid and the conjugated base thereof.

The unit includes three digital pumps for acids, bases and antifoaming agents.

This regimen requires close monitoring (metabolic status, acid-base and electrolyte status, vital parameters etc.) in an intensive care unit or similar setting.

It is preferably kept constant by a controlled addition of acid and/or base.

Using an aqueous acid and/or base, the corresponding cyanamino, guanidino and ethoxycarbonyl-p-toluenesulphonamido groups are hydrolysed.

However, acid- and/or base-labile systems cannot be alkoxylated successfully under the conditions indicated.

The functional group of the acid and the base may be in the same molecule.

The controlled variable is the pH value, which is influenced through the continuous influx of acid and base.

When we mix an acid and a base in the same proportion then a salt and water originate.

In this lab, we tested pouring BTB in an acid and a base.

A difference between HB and XB is since halogen atoms are Lewis bases, a halogen atom can both donate and accept in a halogen bond.

This regimen requires close monitoring (metabolic status, acid-base and electrolyte status, vital parameters etc.) in an intensive care unit or similar setting.

Purification of 1-octanol by extraction with acid, base and water and subsequent drying is recommended.

In Method (II), the carbamate reaction mixture and the acid are mixed with one another during acidification in such a way that substantially equivalent quantities (val-quantities) of acid and base are reacted with one another per unit of time.

Rather, even slight changes within the aforementioned variants such as changing the acid and/or the base in the case of variant (a), or changing the chlorinated hydrocarbon and/or the aliphatic hydrocarbon in the case of variant (b), or also changing only the cooling process and the crystallization rate, will lead to different crystalline modifications or mixtures of the same, as illustrated by the examples.

A process as claimed in claim 1 for preparing a 3-arylacrylic acid or its derivative I, which comprises reacting a 3-arylpropionic acid derivative III in the presence of acid or base and, in the case where R1 is C1 -C20 -alkyl additionally with a C1 -C20 -alkanol.

The invention also relates to a process for preparing 3-arylacrylic acids and their derivatives I, which comprises reacting a 3-arylpropionic acid derivative III in the presence of acid or base and, in the case where R1 is C1 -C20 -alkyl, additionally with a C1 -C20 -alkanol.

Both dropping funnels are simultaneously emptied over a period of 90 minutes into a reaction vessel containing 100 ml of water at such a rate that equivalent quantities of acid and base are added per unit of time.

Both dropping funnels are simultaneously emptied over a period of 150 minutes into a reaction vessel containing 100 ml of water at such a rate that equivalent quantities of acid and base are added per unit of time.

In conjunction with monopolar membranes, bipolar membranes may be used to separate a salt MX into the acid HX and the base MOH by elctrodialysis.

According to the invention, this is achieved by means of a method which is characterized in that, in a first step, tetraethoxysilane dissolved in an alcohol is hydrolyzed by the addition of water and an acid and, in a second step, water and a quantity of a basic material are added to the hydrolyzed solution, which quantity of a basic material is more than sufficient to neutralize the quantity of acid present, the acid and the basic material being chosen so that in the neutralization step a compound is formed which is sufficiently volatile to escape in the subsequent process steps, after which, if desired, after gelation of the basically reacting hydrolyzed tetraethoxysilane, the reaction mixture is placed in a hermetically sealed container under a pre-pressure of a gas which is so high that during heating to a temperature above the critical temperature, boiling phenomena in the solvent cannot occur.

The organic layer is collected and then washed sequentially with dilute acid, dilute base, a saturated sodium chloride solution and dried.

The salts are prepared by combining equivalent amounts of acid and base, each dissolved in a solvent, and evaporating the solvent.

Utilization of a neutral pH surface layer 12 helps, but does not successfully avoid the electrode erosion problem since the generated excesses of acid and base have been found to be out of balance.

The degree of hydrolysis of the polymers depends mainly on the amount of acid or base used and on the temperature during hydrolysis.

If weak acids and weak bases are employed simultaneously, it is not necessary to maintain an equimolar ratio between acid and base.

In EP-A-300 325, Example 7, it is taught that the reaction of one equivalent of 3-benzoylpropionic acid with one equivalent of morpholine in ethanol yields a crystalline salt composed, as expected, of one part of acid and one part of base.