DE24921C - Presentation of hop extracts for brewing beer - Google Patents

Description

IMPERIAL

PATENT OFFICE

The four main components of hops: i. the aromatic substance or the ethereal OeI, 2. the bitter substance or lupulin, 3. the binding substance or the resinous substances, 4. the clarifying substances Substances, or the tannin of hops, have such different chemical properties that it through the process of cooking, as it is now customary in brewing, only partially and very much be pulled out incompletely. Two of these become in the course of the brewing process partly volatilized during cooking or afterwards and partly in insoluble form eliminated; one of them, which is very sparingly soluble in water and only with it a small part of the wort instead of the whole wort is associated, is largely lost. The present one aims to address all of these evils and losses Help invention.

It is best to subject freshly picked or dried hops to a distillation with water or steam to get the essential oil, which is the aromatic component, to be deposited. The hops are then extracted with carbon disulfide. The extract is then completely separated from the carbon disulfide and treated with a solution of caustic potash or caustic soda neutralized and used for brewing purposes. It contains the bitter substance and the resinous substances.

In order to produce lupulin for medicinal purposes, the extract mentioned above is used after it has been freed from carbon disulfide, dissolved in alcohol and filtered. The alcoholic Solution is separated from the residue and this residue is dissolved in ether. This solution is shaken with a caustic potash or caustic soda solution and the resulting potash or Soda compound of lupulin by shaking the ethereal solution with distilled water from Aether separated and kept for medical purposes. After exhaustion with carbon disulfide, the hops are with Water vapor extracted. The aqueous extract is then evaporated or like sugar solutions concentrated in a vacuum. This is how you get hops tannin, the clarifying substance. By these various methods the four main constituents of the hops are extracted and separated from one another, instead of being largely lost, as is now the case to go. They also become wholly and perfectly brewing and generating of different types of beer can be used; In addition, lupulin is used for medical purposes Purposes converted into the more appropriate form of a lupulate.

When using the bitter substance produced in this process, the yeast will not, how if this is the case now, it will be bitter, and because of this and because of the high nitrogen content it will be give valuable fodder.

The absence of hops in the wort means savings for the brewer, since no wort is retained in the hops, as is now the case.

By using the aromatic substance produced by this process, the Brewers produce beers with a good and consistent aroma at all times of the year. By this procedure becomes the first value of the

The hops are preserved instead of being diminished day by day, as is now the case.

The most suitable implementation of the method found in practice is as follows:

Taking off the aromatic substance.

You use the hops as freshly as you can get them, and best of all sun-dried, although it may have been dried under mild artificial heat can. The extraction takes place in a metal cylinder of about i, a m in diameter and 3 m in height, which has a double bottom, where the inner bottom is perforated. The lid of the cylinder fits airtight and fits Pipe leads from it to a coiled pipe surrounded by cold water.

Steam is allowed to flow in underneath the perforated floor, which flows through the Hops goes through. The steam ripens the volatile oil with it into the condenser. The outflowing liquid divides into two layers, the upper oily from the aromatic volatile OeI. It is used in bottles without further treatment kept.

The watery layer still contains some volatile oil and, in order to obtain the same, is used to generate steam for a second operation.

Hot air is passed through the cylinder to dry the hops. He can then be packaged for storage or can be used for further treatment stride.

Extraction of the bitter substance and the
Binding agent.

The hops are run in a container with a precisely fitting lid, with carbon disulfide Poured over, stand for a few hours and then remove the latter. Through repeated Treatment removes everything that is soluble in carbon disulfide from the hops and the Carbon disulfide completely or nearly saturated with the soluble substances.

The carbon disulfide solution is then distilled under mild heat and further Use condensed. The extract remains in the still and becomes while it is is still very thin, brought into a much smaller still to separate the Carbon disulfide to complete. This gives the extract a syrupy texture and in this condition it is dissolved in a strong solution of caustic soda. The alkaline solution is best concentrated in a vacuum until it becomes sticky; then it is ready for use and should be stored in closed jars.

After the treatment with carbon disulfide, the hops are placed in the same container Steam treated to drive off the remaining carbon disulfide and further Use to condense.

Extraction of the Clarifying Substance.

The steam treated hops resulting from the last operation described is boiled with water. The liquid is drawn off clear and then best in one Vacuum pan evaporated to a syrupy consistency and then bottled or brought closed vessels in which it is kept for use.

The aromatic substance is extraordinarily easy to oxidize and to a certain extent Also fleeting. These two loss-making properties are caused by the Highly assisted in drying and sulphuring. The latter makes him very small amount of aroma remaining in the hops due to the formation of valeric acid destroyed by the sulphurous acid. Accordingly, the sulfur does not serve any other Purpose than to bleach the hops at the expense of the most valuable part of it, of the aroma.

By contrast, the procedure described makes it the most valuable and indispensable Component in its full natural beauty, so that it can be used for any length of time be stored in closed bottles, protected from oxidation and volatilization can.

The lupulin or the bitter substance is very closely connected with the resinous substances and in this enveloped; in this state the lupulin and the resins are not soluble in water, and not even in liquids that contain alcohol.

The boiling temperature of the wort is sufficient to remove a small part of the resin and the to melt lupulin encased in it; these then remain suspended in the wort. By the alcohol that forms during fermentation is dissolved some lupulin and resin and the whole excess torn down by the yeast and the nitrogenous substance.

In the process described, the lupulin appears in the form of a lupulate and is very easily soluble in the wort in this way; therefore the whole is added Amount dissolved in the beer.

Compared to the other components in the hops, the tannin is the greatest Contain quantities, but with the methods used up to now it is lost, since only a small one Part of the wort is boiled with the hops.

Through the process described, the entire amount of tannin can be used.

It should be boiled with the whole wort; no other clarifying agent is necessary and Any excess tannin should be converted into alcohol by fermentation.

The brewing process is briefly as follows:

When the wort reaches the brewing tub to boil, the tannin, Lupulin and the resin added. Almost the whole thing is solved and only a very small one The part remains floating; the tannin therefore has sufficient time to deal with the nitrogenous To associate substances in all parts of the wort. It is not necessary to strain the wort, but rather it can cool down directly. When the seasoning for the fermentation tub is ready, it will be with Take great care, and before adding yeast, add the aromatic substance to the seasoning mixed.

Claims (2)

Patent claim: 1. The process of separating the bitter substance or lupulin and the conserving substance or resin material from hops by extraction of the same with carbon disulfide, removal of the solvent mediated Distillation and dissolution of the extract in caustic alkalis. 2. The further treatment of the hops, from which the volatile oil, the lupulin and The resin substances were extracted by boiling with water and concentrating the solution, thereby making a tannin extract in a form suitable for use.