DE1771848C - Process for removing acid from crude, acidic pentaerythritol tetranitrate - Google Patents

Description

3. The method according to claim i or 2, characterized in that it contains less than 0.01 ⁰ Z ₀ nitric acid HNO _;

which contains up to 10 ^U / ₀ alkali. 25 According to the procedure for working up the crude penta

4. The method according to claim 3, characterized in that the kenn- erythritol tetranitrate reaction mixture is used records that for washing water is used commercial process, consequently the reac will, which contains an alkali hydroxide as alkali. mixture diluted with cold water, the penta

5. The method according to claim 3, characterized thereby obtained erythrittetranitrat by filtration and that z.-ichnet that for washing water used 30 product then a series of washes with which contains an alkali carbonate as an alkali. subjected to boiling water, taking on each

6. The method according to claim 1 to 5, characterized in that the washing process is followed by a filtration stage. Also after indicates that the acidic pentaerythritol- ten treatments with boiling water contains tetranitrate in the liquid explosive in a, however, the pentaerythritol tetranitrate still 0.2% ratio of liquid explosives to penta-peleric acid HNO ₃ .

erythritol granitrate in the range of about 0.25: 1 to In U.S. Patent 2,294,592, the nitrate

10: 1 is dissolved or dispersed. tion of pentaerythritol to pentaerythritol tetranitrate and

7. The method according to claim 1 to 6, characterized from dipeniaerythritol to dipentaerythril hexanitrate It is noted that washing is carried out using concentrated nitric acid alone or in proportion of water to pentaerythritol tetranitrate in the 40 bond with concentrated sulfuric acid. Range from about 0.5: 1 to 20: 1 carried out will. nitrided batch after the completion of nitration

H. The method according to claims 1 to 7, thereby normally allowed to flow in water to the characterized that the Pe.itaerythrittetranil.at win nitrated polyols / u. From the aforementioned dispersed in the liquid explosive and U.S. 45. patent states that preferably Dispersion is allowed to run into the water. Water in the nitriding mixture instead of the nitriding charge 9. The method according to claim 1 to 7, characterized in that the water is run, and it is further characterized that a low-melting hm a working method for such a nitration be-explosive melted in the water and wrote that no dilution with water was necessary and then the pentaerythritol tetranitrate 50 is borrowed. According to the aforementioned USA patent is added. the product is worked up by filtering it off,

with cold water until it is essentially acid-free,

then with hot water, then with a

Excess of 2% sodium carbonate solution and then washed with water and dried. on

The invention relates to a method of removing this way it is according to the said USA.-Patcnt-

aη acid from crude, acidic pentaerythritol font possible, a better separation of the pentaerythritol

Irunitrate, as it is crythrittctranilrals from the acid nitration mixture from the Dipcntaerythritol hexanitrate

Cwonncn will, with simultaneous production of, to achieve that in the reaction mixture due to

Mixtures of explosives. 60 d _he presence of a small amount Dipcntaerythrit

N a ο u m describes in "Shooting and explosives", in most commercial grades of pentaerythritol

) resiJen and Leipzig, 1927, p. 244, the production of is also formed. This work-up method

entaerylhrittetranitrat with an acidity below is also no more successful than others at the

, 01 "/, Nitric acid HNO _n . The finely powdered removal; of acid from pentaerythritol tetranilrate.

'entaerythritol turns into nitric acid with a spc / ili- (<j The cause of the difficulty of separation

: given a weight of 1.52, while the tenipenic acid of the Pcntaerythriltctranitrat is not

ature known through effective cooling between 25 and 30 C. It is believed, however, that the acid

. is held. As the nitration progresses, the nitrated pentaerythritol begins to become very stuck

unit that the alkali or the water is not stranded, which can be unsafe to handle.

is. the Knsialle / ti penetrate, in order to obtain the captured A solid solvent or dispersing medium-

or to remove trapped acid, explosives should have a melting point below 100C

It has now been found that when dissolving or have, so that in the molten state it is in opposition

Dispersion of Pentaery.hrittetranitrat in crude water at atmospheric pressure

(urine, which can be trapped or captured nitric, preferably the explosive has a melting

> contains acid, in a liquid explosive of low point below 90 C. The expression »liquid explosive

gei.r sensitivity as pentaerythritic nitrate in substance «, as it is used here, concludes accordingly

Presence of an excess of water contained in the explosives or liquid at ambient temperature

IVntaerythritol granitrate containing acid easily from io at ambient temperature solid explosives that

is extracted from the water and in this way liquefies a

IVntaerythritol granitrate is obtained, which are essentially a.

lieiien is acid-free. The resulting pentaerythritol to liquid or low-melting solids

■ .etrani'.rat and compositions thereof with the solvent or dispersing medium explosives

like explosives can be less than 0.005% ENT _:; 15 for pentaerythritol tetranitrate, which according to the invention

cntlialten and show improved explosives can be used, include the nitrotoluenes, such as

^ h.iftcn. for example an extraordinarily high amount of trinitrotoluene and dinitroioluene, and the nitrated ones

i ivpiinilliehke. in comparison with similar explosive polyols such as triniethylol ethane trinitrate, propylene glycol

M.iiT / us.imniensei / ungen, the cm by acetone bared dinitrate. Butylene glycol dinitrate, diethylene glycol

ü'üies Pentaerythrittetranitrat »on comparable 20 dinitrate and Dipentae ^ ythrithexanitru *

I) _{contain NO 1} -IiChalt. The relative proportions of explosives with low

The method defined at the beginning is therefore less sensitive to pentaerythritol tetranitrate

diiiigs according to characterized in that the acidic is not critical. The function of the liquid or

t! ..! term pentaerythritol granitrate η liquid or · · liquid low-melting solid explosive

s.f.niol / an explosive that is a solution or dis- 15 is there. Dissolve pentaerythritol granitrate

rvruiermittel for pentaerythritol tetranitrate is, dissolved or to disnergize, whereby the through the penta-

b / Λ dispersed, r> with an excess of water erythritol tetranitrate retained acid is released,

washed that contained in the pentaerythritol tetranitrate so that it is more easily extracted into the aqueous phase

Acid extracted through this water and the explosive can be. It should therefore be a sufficient amount

s! t ff mixture · η in itself known way of which 30 can be used to add all pentaerythritol tetranitrate

acidic water is separated. dissolve or disperse the minimum amount will

Ft from the German Patentsclr 498,950 it was therefore by the solubility or dispersibility of DISOE ^r

known. Manufacture explosives by determining pentaerythritol tetraitrate in the explosive.

Mixtures of solid and liquid polyvalent usually 0.25 parts of explosives are lower

Alcohols. 1. B. Mixtures of glycerine and sorbitol 35 Sensitivity for each part of pentaerythritol translate

or \ on ethylene glycol and sorbitol, nitrated. By the sufficient. Much larger quantities can be used.

common nitration of such mixtures were to be det, and amounts of 10 parts of explosives with it

Avoided difficulties associated with nitration of low sensitivity per part of pentaerythritol tetra-

Solid polyhydric alcohols on their own and special nitrate have proven to be satisfactory. Normal

However, in terms of separation and washing 40, it is not desirable to use more liquid

of the products. The patent shows, however, to use explosives than for the separation of the

no way to produce a nitration-based acid before T \ km pentaerythritol tetranitrate is required,

th, solid at room temperature, crystalline in saltpeter- since the sensitivity and explosive power of the

acid esters, such as pentaerythritol tetranitrate, which can be adversely affected in the ren, if not at

Free crystals from trapped nitric acid. 45 such a quantity of explosives is not harmful

In the case of the method characterized above according to the effect or an improved effect in the combider Invention, the water can contain a small amount of nation of pentaerythritol tetranitrate and explosive alkali included, but this is not essential "nd staffs that may be obtained as a product of the invention is actually formed in accordance with the procedure in the case of certain explosives. Usually lie such as nitrotoluene, which therefore equals the amounts with a ratio of blasts by means of aqueous alkali solution 50 being hydrolyzed should not be advisable. substance with low sensitivity to pentaerythritol

The low sensitivity explosive is said to be tetranitrate in the range of about 0.75: 1 to about 5: 1. a solvent or dispersing medium for penta-combinations of pentaerythritol tetranitrate with be erythritol granitrate when the explosives in explosives with lower sensitivity than liquid or molten state. The 55 pentaerythritol are known. The combination expression In the present generation, “dispersed” is made up of 1 part of pentaerythritol tetranitrate with 1 part of trifindene commonly used to disperse and nilrotoluene is widely used and considered Dissolve to include. When the explosives are referred to as Pentolite. The making of this material Low sensitivity to ambient conditions is described, inter alia, in U.S. Patent 2,407,805 is a solid and not a liquid, but is described in a fio. A temperature in the cited patent can be liquefied, in which it comprises indescribable process for its manufacture ensures that it can be handled, it can disperse 235 parts by weight of pentasols Temperature used at which it is eiythrittetranitrat in the form of crystals in 955 liquid is. In this case it is preferred that it be major water. 235 parts by weight of trinitrotoluene A low-melting substance is involved, the emergency «5 are dissolved in 250 parts by weight of warm acetone, Agility to avoid the pentaerythritol granitrate and this clear solution is in a fine stream during its dissolution or dispersion in the, with stirring, to the suspension of the pentaerythritol liquid Explosives given to tetranitrate in water at a high temperature. The resulting

Product is granular and, as such, can be used as a solid explosive to add to the water

be, or it can be at an elevated temperature of or the aqueous alkali to add the water

Heated from SO to fl5 ^ü C to a semi-flowable or the alkali, if necessary, to a temperature

To create mixture that bring in the solidified form in which the explosive has melted.

or in UulMorm in containers. 5 and then the pemaerythiittetranitral flow in to

It can be seen that the application of the lethal. The "PentaerytliriUetranitral dissolves or dispenses

Now the production of Pentolite is yawed in the liquid blasting air droplets, which in

allows, without it is necessary, the pentad the water or the alkali suspended or dispersed

to rid crythrittetranilrat of acid first, as it is greed, and the acid will dissolve in the water,

was the usual method so far. All that is required is the dispersion of liquid explosives and water

so that the crude, acidic pentaerythritol or alkali is gui led to ensure that

nilrat in the molten trinitrotoluene in turn - all the acid from the Pcnlaerythnttelranitrat

waiting for an excess of water to be dispersed or removed. Then the spicnj ^ iofl will be particles

is resolved. The resulting pentolite separated one from the water or alkali, once

higher sensitivity than after the usual decay- washed 15 or more times with water and gel-dried-

rcn manufactured pentolite. net.

In a similar way, this allows for rounding-off depending on the nature of the explosive being used

Proced the use of raw, acidic low sensitivity and its relative amounts

Pentaerythril octranitrate in the formulation of with respect to IVntaerythr <etraniirats is the Eud-

Dinitrotoluol - Pentaeiyiluiltetranitrui - joint product, a solution or D: .peision of the lVniaerv-

tongues and similar compositions that contain tetranitrate in the explosive, a holder 1 esi-

Trilhyloläthantrinilrat and diethylene glycol dinitrate substance, cm white bupastoscr 1 substance or a viscous one

contain. Compositions with three components' liquid wedge. It can be used as an explosive

can also be produced, for example the agents in all kinds of slurry formulations

Three-component compositions made from pentaery 25 wendel are developed and develop properties that \ u; i

thritlelranitrat - trinitrotoluene - DipentaeiAthrilhcxa- each of the components thereof are contributed

nilrat according to U.S. Patent 2,407,805. For example, when the product is Pentolite. it can

The water is used in a sufficient quantity as Pentolite produced by other processes

applies to a suspension of liquid explosives to be used. The product according to the invention is

to form luminescence, which can be easily handled, but by a PeiUaerythriiielranitralko component

and characterized by the mn low acidity present in your PcniaerythriUeiranitral, which in many

To absorb acid. As a result, at least I all are practically free of nitric acid HNO ₁ , despite

0.5 parts of water for every "sell" of liquid explosives - the fact that crude penlaerylhritol granite is used as

substances, including pentaerythritol granitrate. Aiisgangsmaierial is used. Im I flicks liberated

Very large amounts of water can be used.

den, however, of course no necessary wedge to the tetranitral on the one hand of acid and l' ^v st or disper-

Use of such large quantities that the other hand in the explosives with lower amounts of it

having aggregate volumes inconvenient sensitivity, thereby being united in one process

are. From this circle surmount; the amount of water is what, according to the state of the art, is divided into two

Usually not about 20 times the weight of the 40 separate and different processing grooves

liquid explosives, including pentaerythritol. Outside of the ha! the received pro

telnmilrats. Juki a higher sensitivity.

(If desired, a small amount of water can be added to the water

Amount of alkali to be added to the absorption of the acidic pentaerythritol tetranilrate, which after a

Acid support. Since the Penlaerythril tetranitral 45 nitration process has been made, as well as on

See only: if it contains small amounts of acid, it is not concretised polyol mixtures which are produced by simultaneous

agile, more than 10 percent by weight of the solution to nitration of two or more polyols, for example

AIk.ili to use, and in most lalls wise mixtures of pentaerythritol with trimethylol-

vvenigcr al., I "I ₁ , appropriate. In many lalls 0.1" / "methane, ethylene glycol, diethylene glycol !, propylcii-

Alkali sufficient. .io glycol. Sorbitol or mannitol.

Any alkali can be used;

sometimes sodium hydroxide. Potassium hydroxide, sodium bond with the penlaeryth; iltetrariitral formed

carbonate, ammonium hydroxide and potassium carbonate. Polyol nitrate as the liquid or lowest level

The alkali should be water-soluble, so that the contaminants are used to achieve the atislre-

Cleaning of the explosive mixture with solid 3s bung '

Alkali is avoided. (You should not use water or alkali. In

In the execution of the fulfillment liquid in this 1 -'all in which the liquid explosive, which is released by

Usually it is desirable that the beginning is present first. Disperse with the c'.arin

Penlacrylhrillelranilral is present in the liquid explosive or dissolved Pentaerylhritlclninilral is for

to dissolve or disperse. When the explosive fm removal of acid from the crude koni'.riericn

If it is a solid, it is necessary to wash the explosive with the product only with water or alkali

low sensitivity to melt and then the egg required.

Pentiicrylhrilleiianilrat in the liquefied explosive The nitration of pentaerythiil is known and

Minor. Thereafter, the liquid explosive does not form part of the present invention. As usual, will

stolllösung oilei -dispersion in an excess of (<$ Penlaeiv ihril normally in (ieucnwarl of water

\ V; isser oiler aqueous alkali run and concentrated with ·. ·! · Nitric acid niliieil The IVnta-

daiin {! lcichmäflig or homogeneously dispcigicil. erylhiillelianiliat l-ann from tier Kcaktionsiuiscluiug

I s isl iedoi Ii; 'iieli möglirh, ilen llüssigi-n odei iiied- by diluting in-ii water, whereupon it aiislälli. nc-

7 8 y

be won. If nitric acid is used, it contains pitric acid and that the remaining acid is very low

a mixture of sulfuric acid and water since only a total of 0.05 ° / ₀ when is slowly removed,

or sulfuric acid alone can be added to remove the seventh through tenth wash treatments

Dilute reaction mixture and that are nitrated. It is also evident that after this

To precipitate polyol. If a mixture of concentrated 5 method no product can be practically manufactured

trated nitric acid and sulfuric acid, which contains only 0.01% HNO ₃ , can be used, which can be explained

the pentaerythritol tetranitrate falls along with why the acetone solution method is used

tender reaction. if pentaerythritol tetranitrate with such low

The obtained raw pentaerythritol granitrate may like acidity is required. then subjected to the process according to the invention io Another part of this acidic pentaerythritol

The trapped or residual acid is converted into tetranitrate, which contains 0.43 per _{cent of} nitric acid

remove. It is not necessary to then subject the crude product to the process according to the invention,

usual washing process to remove the acid to 25 parts of dinitrotoluene are quickly at 95 ° C in a

subject, since in the process according to the invention all the same amount by weight of water is stirred in, with each other

acid contained therein is removed. By simply 15 forming a dispersion of it in the water. 25 parts

The amount of water or aqueous pentaerythritol tetranitrate can slowly be tested

Like alkali to be easily determined, the mixture required is given, and the mixture is quickly established

around an essentially acid-free pentaerythritol tetra- stirred. The pentaerythritol granitrate dissolves in the

to produce nitrate. Dinitrotoluene, and an emulsion results which in

In some cases it is convenient to let the penta cold water flow. The grainy one

erythritol tetranitrate repeated solid product according to the invention is separated off, washed and dried

·. Submit treatments if that is out of the acidic net. The acidity of the product is 0.02 NHO ₃ . Reaction mixture recovered crude product. This experiment is carried out using 35 parts

Contains a fair amount of acid. Whether several dinitrotoluene and 15 parts of the pentaerythritol tetra-

Treatments and how many are required depends on how many nurats are repeated with 35 parts of water. The acid

the acidity of the product after the first treatment is 0.004% HNO ₃ . recovered pentaerythritol tetranitrate. Ordinary is
however, a treatment according to the invention is sufficient. Example 2

The following examples illustrate that 25 g of commercially available trinitrotoluene are used at 95.degree

currently preferred embodiments of the invention. 30 melted in a beaker. 10.7 g raw penta

_B. ... erythritol granitrate, which contains 0.24% HNO ₃

e ι s ρ 1 e dissolved _in ^ _εηι g _esc h _m olzenen trinitrotoluene, and the

hl wed

g g,

1 part of pentaerythritol is slowly stirring and the molten mixture is slowly stirring

Cooling to 6 parts by weight of 97.3% aqueous in 35 g of cold water is run. The mixture

Given nitric acid. The addition requires about 35 is then filtered at slightly above room temperature,

1 hour, during this time the temperature is washed with water and dried. The acid reverberation

temperature between 25 and 30 ⁰ C kept. The mixture of the granular product is 0.006 ° / ₀ HNO _3. is then stirred for another half hour, in one

Excess of cold water transferred, several Example 3

Stirred minutes and filtered to remove the precipitated 40

Remove pentaerythritol granitrate. The collected 25 g of commercially available trinitrotoluene are divided

Pentaerythritol tetranitrate is melted in an excess of stirring at 95 to 100 ^° C. under 25 g of water

transferred to cold water, the mixture becomes several zen. 10.7 g of crude pentaerythritol tetranitrate, the 0.24%,

Stirred minutes, filtered and again _{containing cold HNO 3} , is slowly added to the mixture

Water transferred, stirred and filtered. The product 45 and dispersed therein. The hot mixture becomes sth

is analyzed, and a content of 0.4% is stirred for ¹ l for _{2 hours.} The pentaerythritol granitrate disper

Nitric acid HNO ₃ found. yaws in the trinitrotoluene. The mixture is dam

A portion of this crude, acidic product is cooled to room temperature and filtered. The acid

ten consecutive actual treatments amount of the obtained granular product

with boiling water with a filtration step after 0.003% HNO ₃ . subject to any treatment. The acidity of the

Pentaerythritol tetranitrate is added after each step

is correct, with the following results being obtained:

25 parts of dipentaerythritol hexanitrate are at 90 b <

treatment

1. Treatment.

2. Treatment.

3. Treatment.

4. Treatment.

5. Treatment.

6. Treatment. 10. Treatment.

Acid content of 55 95 "C quickly dissolved in 25 parts of water. 25 parts of pentaerythritol pentaerythritol tetranitrate, which contains 0.4% HNO ₃ tetranitrate, are then slowly added with rapid stirring

give. The pentaerythritol tetranitrate dispersed in the 0.43% HNOj dipentaerythritol hexanitrate, resulting in a 0.30% HNO ₃ ⁶ O emulsion-like mixture which is _{poured into cold water 0.31% HNO 3} . The granular product is separated from 0.31% HNO ₃ , washed and dried. The 0.27% HNO ₃ acidity of the product is 0.03% HNO ₃ . 0.25% ENT ₃ This product is then used for half an hour

0.20% HNO ₃ 65 subjected to another water washing treatment at 90 to 95 "(the mixture is cooled, and since it can be seen that even after ten treatments the product is filtered off. The resulting product with boiling water the product still 0, 2% SaI- contains 0.005% HNO ₃ .

Example 5

A 50: 50-PentoIite is prepared as follows: 1.36 kg granular trinitrotoluene are added under stirring at 85 ⁰ C in a container under 5.44 kg V / .isser melted. 1.5 kg of crude pentaerythritol tetranitrate containing 0.31% HNO ₃ and 8.6% water are added to the mixture and dispersed therein by stirring at 85 to 95 ° C. for 30 minutes. 4.08 kg of hot water (9O ⁰ C) are added to the mixture, and heating is terminated. The mixture is stirred while gradually cooling until small pentolite spheres are formed. The mixture is then cooled to 60 ° C. and filtered, washed with water and air-dried overnight. The acid content of the recovered small Pentolitekügelchen is 0.003 ° / ₀ HNO _3.

The product is tested for particle size with the following results:

Particle size mm (mesh)

> 2 mm

0.84 to 2 mm
0.59 to 0.84 mm
0.44 to 0.59 mm
0.25 to 0.44 mm

• ^ 0.25 mm

Bulk density g / cm ³

0.71
0.74
0.75
0.74
0.80

U, / O

The product is subjected to a melt test to compare its melt properties with two commercial 50:50 pentolite compositions to determine.

1000 g of the pemolite from Example 5 melt completely within 15 minutes when placed on a steam table at 1.05 kg / cm ² pressure. A temperature of 99 to 100 ^° C. is necessary in order to obtain the consistency required for pouring.

1000 g of a commercially available 50:50 pentolite melt in about 10 minutes on a steam table with a pressure of 1.05 kg / cm ² . A temperature of 93 ° C is necessary to get the consistency suitable for pouring.

1000 g of a second commercially available 50:50 Pentoiites require 30 minutes to melt on a steam table at 1.05 kg / cm ^{a pressure.} It is a temperature of 104 ⁰ C is required to obtain a Gießkonsistenz, but the pentolite is still very thick at this temperature.

150 g detonators are poured from each of these pentolia mixtures in the molten state, and the sensitivity of the cast igniter is determined. In addition to the three pentolites described above 1.50 g detonators are made using mixtures of the molten pentolite from Example 5 in combination with the proportion of trinitrotoluene flakes in poured in the amounts given in the table below.

ίο composition sensitivity 50: 50-i'entolite off BeisDiel 5 Detonator No. 1 90 parts of 50:50 pentolite »5 example 5.10 parts TNT Flakes Detonator No. 1 80 parts of 50:50 pentolite Example 5, 20 parts TNT- Flakes Detonator No. 1 ³⁰ 75 Part 50:50 pentolite Example 5, 25 parts TNT- Flakes Detonator No. 4 70 parts of 50:50 pentolite Example 5, 30 parts TNT- ^a 5 flakes Detonator No. 6 50:50 pentolite, mechanical ground mixture ¹ Detonator No. 3 Commercially available 50:50 pen tolite No. 1 (50.54 ° / _n 3 ° pentaerythritol granitrate, 49.46 ° / ₀ TNT) Detonator No. 3 80 parts commercially available 50:50 Pentolite No. 1, 20 parts of TNT flakes .... Detonator No. 6 35 Commercially available 50:50 pen tolite No. 2 (47.30 ° / " Pentaerythritol granitrate, 52.70 ⁰ Z ₀ TNT) Detonator No. 1 80 parts commercially available ♦ ° 50: 50-Pentoüte No. 2, 20 parts of TNT flakes .... Detonator No. 6

¹ Determined over the course of 3 days of production.

The increased sensitivity of the 4 »pentolite mixture according to the invention in comparison with the two investigated commercial pentolite mixtures are clear from the above results. This improved Sensitivity is retained, even if the Pentolite is mixed with up to 20 parts of TNT flakes will. The presence of 25-30 parts of TNT flakes decreases the sensitivity considerably, but the resulting mixture is still at least just as sensitive as the mixtures of commercially available pentolites with 20 parts of TNT.

Claims (2)

Pentaerythritol tetranitrate, and the claims: the product is separated out by adding concentrated sulfuric acid with stirring and 1. Process for removing acid from crude,. len completed. Abliltrierl The cooled Pentaerythrittetrasäurehaltigem pentaerythritol tetranitrate, as nitrate from 5 directly and first with 50 ^(/ ₀ derived IGCR the acidic Nitrierungsmischung, sulfuric acid, and then washed with water. Os with simultaneous production of explosives contains trapped nitric acid and mixtures thereof, characterized characterized by dissolving in hot AoUon, including a little that the acidic pentaerythritol tetranitrate is added to ammonium carbonate, and filtering the liquid or molten explosive, which is a hot solution in twice its volume of solvent or dispersant for pentaerythritol 90% alcohol , whereby the pentaerythritol tetranitrate is dissolved or dispersed, is precipitated with a nitrate in the form of fine needles. Washed excess of water, which is purified in the penia. Acid containing erythritol tetranitrate by this. According to a variant of this method, the Water extracted and the explosives mixture in 15 acetone solution of Pentaeryihriletranitrat with stirring In a known manner from the acidic ren allowed to flow into an excess of water Water is separated. will. The pentuerythritol granitrate falls in pure form 2. The method according to claim 1, characterized in crystals from which abliltnert. washed with water draws that as liquid explosives nitrated and dried. Toluenes and / or nitrated PiMyo'e, in particular 50 Both processes are time-consuming and costly. Trinitrotoluene and / or trimethylolethane trinitrate, but these are some of the known ways of working, be used. with which pentaerythritol tetranitrate with an acid