DE753421C - - Google Patents

Description

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FAHLBERG LIST. ■

AKTIENGESELLSCHAFT lAARi magdeburg Südost, den ' ¹ ^ * lMOVemoer

CHEMICAL FACTORY LLÜLH ^ JJ / ** "* ~ ' " - "" * ■ * - * _£ .

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F 87 395 IVa / 45 1 KV *. ' ^% "'!

Pesticides' sxis SuIf II pulp waste liquor.

Sulfur-containing pesticides have been known for a long time, The simplest way to use sulfur as a spray was to use «LarySulphur suspensions, which are finely ground Sulfur was distributed in "water and sprayed onto the plants as a spray mixture. The effect and retention capacity of the sulfur depend but to a large extent on its degree of delicacy; to increase both an increase in the degree of punity is necessary «, so they went about precipitating the sulfur in sulphurous liquids as a fine flaky precipitate or even as a colloidal solution to apply «The difficulty of using really colloidal sulfur solutions is known to lie in the endeavors of the colloidal particles to cling to one another, to "grow" and so gradually change from the colloidal state to the precipitated one,

The sulphurous lime broth previously used for pest control has the disadvantage that it has a short shelf life and poor Can be metered »In addition, there is the fact that the production method the sulphurous lime broth is a difficult and cumbersome one »

The invention relates to a method for the production of a sulfur-containing one which is particularly suitable for pest control Product made from sulphite pulp liquor.

It has already been proposed to use alkaline liquors Pulp manufacture for the manufacture of pesticides to be used by adding alkali metal cyanides.

You also have physical ones that have been produced by wet means Mixtures of sulfur and sulphite waste liquor for pest control related.

Pastes have also been used for the same purpose

Sulfur, sulfiiyabiange and calcium polysulfide at ordinary "temperature and dried at 50-74 °.

Ss has now been found that in contrast to the known Procedure for the implementation of sulphi ^ abTaage with sulfur and / or Sulphides and / or polysulphides in the presence of sufficient solvents and at a higher temperature in an alkaline solution from sulphite pulp waste liquors, a product with a disproportionately higher content of sulfur-i Compounds are obtained by simply dissolving them in water

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FAHLBERG-LIST _{o Λ ο r,,}

AKTIENGESELLSCHAFT ~ ~ magdeburg sddost, den ι ^ »i <OVeinDer 1

CHEMICAL FACTORY

P. 87 395 IVa / 45 1 2734

can and cannot be used to produce spray solutions shows the toxicity of the barrioin linkages "

The working method according to the new procedure is, for example, the following:

2 to 5 parts of dry residue from sulphite pulp waste liquor and 2.3 parts of sodium sulfite are approximately 12 parts V / ater dissolved and

2 parts of sulfur added. d

Instead of 2 parts of sulfur and 2.3 parts of N & triumsulfi% can even

4.3 parts of alkali polysulphide are used.

Then, while maintaining a p _H is more than 8.5, suitably between 9 and 10 1 - heated for 2 hours under reflux to boiling and then evaporated to dryness in vacuo.

The product obtained in this way is not hygroscopic and easily soluble in cold water with almost no residue. It can for example as an injection agent for combating animal and plant pests, in particular for eradicating the real ones Powdery mildew (Oidium and similar) and as an additive to the washing water in the Sheep laundry find use.

The main components of the new product are: Polysulfides, organic sulfur compounds and colloidal sulfur.

Dry residues can be used for its production or raw sulphite (cell pitch) or more or less thickened Use waste liquor. The waste liquor can also be used beforehand with the addition of aqueous alkali be evaporated. Instead of aqueous sulphite cellulose lye or its evaporation residues! can also use the waste liquor Find use that is obtained after the alcohol has been extracted from the sulphite pulp waste liquor.

In addition, the preparation can be carried out below the boiling point make or shorten the boiling time, resulting in a product with a higher content of unreacted sulfur. on the other hand the content of sulfur compounds increases with extension the cooking time and when working under pressure. Depending on the intended use can the addition of sulfur be increased or decreased, without the product showing changed properties. An addition of

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FAHLBERG-LIST AKTIENGESELLSCHAFT

CHEMICAL FACTORY

F 87 3 ^L J5 IVa / 45 1

MAGDEBURG SOUTH EAST, the

November 12, 1941

Sulphide or polysulphide is not absolutely necessary as this is the case form in the course of the reaction.

With the help of the present proceedings it has thus been possible to a valuable preparation from a waste product of the pulp mill, which has so far only been used to little advantage, the sulphite waste liquor to gain pest control.

Explanation example:

IUüller-Turgau Iopfreben heavily infested with oidium are also infected a 2-form aqueous solution of one according to the above method Sulphite pulp liquor produced preparation sprayed. The infestation disappears completely After 15 days there is still no infection occurred.

Claims (1)

Claim: Process for the production of a particular one for pest control suitable sulphurous dry product from sulphite pulp waste liquor, characterized in that the latter in alkaline solution at elevated temperature with sulfur and / or Sulphides and / or polysulphides ^ converts and then dries. cg