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Years of experience in the production of aluminium oxides and decades of continuous development have made Silkem a widely recognised manufacturer of special materials in the fields of zeolites, silicates, special alumina and boehmites.

Silkem sells its products in more than 40 markets. The company’s strategic advantage and an important part of its development strategy are its flexibility and the dynamic ability to adapt in meeting quality and logistic needs of its customers. Close cooperation with customers and own development of new products enable a continuous expansion and specialisation of the production programme.

Company history

Silkem was founded in 1992 on the basis of 40 years of experience in the production of aluminium hydrates and other types of alumina in Kidričevo, Slovenia. After production in the red section of the old alumina plant was closed down, successful adaptations and an innovative approach allowed for the start of two basic production programmes: zeolites with silicates and special alumina.

Environmental requirements have allowed for a fast assertion of synthetic zeolites in the production of detergents. To adapt to new production methods (dry mixing) in the mid-1990s, Silkem also began with production of zeolites and silicates in granulated form with additional components of detergents. At the turn of the 21st century, the company developed the production of ultra pure zeolite, which resulted in new sales opportunities in plastic production. With development of granulation and calcination of zeolite powders, which was concluded in 2011, the company’s position in this market was further strengthened and new opportunities in other application fields emerged. In 2017 the production programme of granulates was expanded to dried silicates with high bulk density.

The development of special alumina was directed towards the use in refractory materials. In a short span of time, the company became an important supplier of highly calcined and fine ground alumina. So as to meet customer requirements, the first line for the production of tabular alumina was set up in 2003 and within a few years, capacities doubled. In 2007 the sales programme for the refractory industry was expanded with sintered spinels. Special methods in the preparation of raw materials and additional processing of the final products have allowed Silkem to expand the production programme to calcined and tabular alumina with special properties, enabling their use in other application fields. Changes in the MAL Group, the parent company of Silkem since 2001, have resulted in a new ownership structure after 2012. The ownership share in Silkem Hungary enabled Silkem to expand its range of products from the special alumina programme.

In 2015 production capacities and own development allowed for the start of the boehmite production programme.

Quality policy

The quality of the company’s products and services is dictated by industry standards and Silkem’s commitment to continuous development and improvements in this field. The observance of standards and the company’s commitment are the driving force of progress and continuous improvement of quality in all fields of operations. The company’s main objective is to perfect customer's needs and requirements.

The company strives to continuously improve its quality with careful selection of raw materials and suppliers, which meet the standards of quality and environmental protection. Continuous improvements are aimed at regularly maintaining and implementing quality control under ISO 9001 (which is confirmed by the certificate), while also complementing the processes.

All employees strive towards achieving and maintaining quality in the broadest sense. In Silkem, quality assurance has outgrown the frameworks of industry standards, rules and regulations, as it has become a part of everyday processes.

Environmental responsibility

Environmental protection is an important part of the partner relationship between the company and the community. Environmental impacts are closely monitored and regulated by the extensive legislation and procedures for obtaining appropriate permits. The company meets the requirements set forth by the national and international environmental legislation and has acquired the environmental permit.

Silkem introduces the best available technologies, which are described in BREF notes and which ensure lower emission levels and better energy efficiency. As an environmental permit holder, the company monitors environmental impacts with emission monitoring, while additionally takes care of the optimal and effective use of energy under the ISO 50001 standard (certificate) and of industrial water.


Company info

SILKEM, d.o.o.
Tovarniška cesta 10
SI – 2325 Kidričevo

+386 (0)2 79 91 200 
+386 (0)2 79 91 230

Email: This email address is being protected from spambots. You need JavaScript enabled to view it. 

Registration number: 5584060000
Tax identification number: 21270481
VAT number: SI21270481

SILKEM proizvodnja zeolitov, d. o. o. is registered with the Ptuj District Court
Share capital: EUR 2,999,968.00
Activity code: 23.990 Manufacture of other non-metallic mineral products

Bank accounts:

IBAN SI56042020000231476, SWIFT KBMASI2X (Nova Kreditna banka Maribor)
IBAN SI56290000003153909, SWIFT BACXSI22 (UniCredit Banka Slovenija)
IBAN SI56300000002164882, SWIFT SABRSI2X (Sberbank banka d.d.)
IBAN SI56330000003723239, SWIFT HAABSI22 (Addiko Bank d.d.)

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