DE1261384B - Process for the production of guar gum from guar seeds - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

A231

German class: 53 k - 4/01

Number: 1261 384

File number: St 21495 IV a / 53 k

Filing date: December 21, 1963

Open date: February 15, 1968

The invention relates to a method for obtaining guar gum from guar seed by separation the inner shell of the seeds from the outer shell and the core using a swelling process.

So far, the separation of the core from the inner shell, the guar gum after grinding obtained by repeated peeling, grinding and classifying processes. Despite frequent repetition of this Operations that require expensive equipment will, however, be a sharp separation of the inner shell from the Core not achieved. As a result, only 10 to 30 per cent of the guar gum present in the processed seed becomes won.

Processes are also known in which the guar seed is subjected to a swelling process. A freezing process is then connected to this swelling process, in which the swollen seed is cooled ⁰ C to -10 -30 to. Such a freezing process requires a cooling apparatus which requires high investment and maintenance costs. The operating costs are also significantly increased by the freezing process. In addition, there is an extremely unfavorable influence on the end products of the process. The guar gum undergoes such a structural change that its binding capacity and thus its quality is reduced. In one of the known methods, the cores also take part in the freezing process and thawing process. This reduces their vitamin content and the digestibility of the protein.

In one of these methods, which include a freezing process, the seeds first become mechanical crushed, after which the core components should be able to be sieved off according to their friability. In fact, however, the outer layer of the kernels adheres to the inner wall of the inner shell and leaves it cannot be released from it by the mechanical treatment. Also through the subsequent source and Freezing treatment loosens those stuck to the individual pieces of the broken inner shell Core particles not properly removed from the inner shell, so that pure guar gum is not obtained.

In another known method, the seed is not crushed and unpeeled to the swelling process and then subjected to the freezing process. But since the water has to diffuse through the outer shell of the seeds, the swelling process takes a very long time. After subsequent comminution, the components should be separated mechanically, by flotation or by electrostatic means. This separation is therefore incomplete - there is no process for the production of guar gum
Guar seed

Applicant:

Dipl.-Ing. Friedrich Kurz,

2084 Rellingen, Vossmoorweg 35;

John zum Felde & Classen G. m. B. H.,

2000 Hamburg 1, Alstertor 21;

Friedrich Prince of Saxe-Coburg and Gotha,

2000 Hamburg, An der Alster 15

Named as inventor:

Dr. Gerhard Stalmann, 2050 Hamburg-Bergedorf

constantly, as the individual core parts are already being crushed, which is to be carried out by hammer mills are so wrapped together that they can no longer be separated at all.

The invention consists in that the seeds before swelling in water in a known manner of freed of the outer shell and, after swelling, squeezed, dried and sifted.

The advantage of the invention is that a significantly lower cost of systems than before is required. Since the seeds are freed from the outer shell before they are swollen, a strong swelling of the inner shell and thus a substantial softening of the same achieved, so that when it is then squeezed, the core is pushed out of the inner shell and thus completely is separated. A freezing process that adversely affects both the inner shell and the core is no longer required. After drying and sighting, pips fall on the one hand free guar gum and, on the other hand, guar gum free cores. Since the accumulating kernels are no longer as before with inner shell mass and are therefore difficult to digest for the cattle, so they stand now available as high-quality protein-containing feed.

Since after being crushed, the kernels are often still connected to the crushed inner shell, the dried material is grated before sifting, so that the kernels of the dried Tear off or break off inner shells.

809 508/181

The swelling process is carried out in water for about 12 hours, so that the volume increases inner shell is reached about three times. The swollen material is then between Pinch roller pairs passed through, so that the less swollen and harder kernels from the soft inner shell to be pushed out.

Through the subsequent drying, which is carried out e.g. in belt or floor dryers the moisture absorbed during swelling is removed again.

During the subsequent rasp, the material is passed between corrugated rubber rollers, so that the kernels that are still attached to the inner shell mass adhere, break off and can be separated from this during the subsequent sighting.

Claims (2)

Patent claims: 1. Process for obtaining guar gum from guar seed by separating the inner shell the seeds from the outer shell and the core using a swelling process, characterized in that the seeds before swelling in water in a known Way freed from the outer shell and squeezed after swelling, dried and sifted will. 2. The method according to claim 1, characterized in that the dried material before Sifting is rasped. Considered publications:
British Patent No. 749 766. 809 508/181 2.68 © Bundesdruckerei Berlin