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Cyclize, a spin-off from the University of Stuttgart, has developed a technology to defossilize the chemical industry using mixed plastic waste and CO2 as raw materials to produce synthesis gas (a gas mixture of carbon monoxide and hydrogen). This synthesis gas is a fundamental building block for advanced chemicals and is used in making plastics, methanol, hydrogen, and e-fuels. Until now, synthesis gas has been obtained through the linear use of fossil resources such as natural gas. The innovative plasma-based process replaces fossil resources with waste materials, enabling a circular carbon economy and avoiding hundreds of megatons of CO2 annually by 2050.

HTGF-Manager: Johannes Weber
Added to portfolio 06. Feb 2024

MinCell Exit

MinCell develops innovative technologies and recipes for foam-glass gravel and board production. We are aiming to be the cost leader with high quality in this segment (me-too product). Having successfully finished our R&D and testing phase, we are in the process of setting up our manufacturing and distribution footprint for the European market.

Exit since August 2014.

HTGF-Manager: Dr. Andreas Olmes
In portfolio 14. Dec 2010 – 06. Aug 2014


My Recycling is developed by Resourcify GmbH from Hamburg. The app is the easiest solution for businesses to easily manage all of their waste, collections, and recyclers in one app, and for waste management companies to seamlessly connect with their customers online. Our vision is zero-waste: enabled with the digital transformation of the waste sector as the foundation for the circular economy.

HTGF-Manager: Johannes Weber
Added to portfolio 16. Apr 2018


saperatec has developed an innovative technology to conserve and recover valuable and scarce materials through a recycling process. The firm initially plans to focus on photovoltaic modules and in the long term diversify its business into other areas. The innovative technology will in the long-term be adapted to other areas.

HTGF-Manager: Jens Baumgärtner
Added to portfolio 20. Jan 2011

Terrawater Exit

Terrawater produces process water and drinking water out of Sea- and waste water. Additionally it is possible, to concentrate waste water for better disposal.

Exit since Sep. 2011. Purchaser: TAPROGGE ESACO GmbH

HTGF-Manager: Klaus Lehmann
In portfolio 10. Aug 2007 – 16. Sep 2011

traceless materials

The circular bioeconomy startup traceless materials has developed a holistically sustainable alternative for plastics and bioplastics that is fully compostable in nature, contributing to solve the global plastic pollution.

HTGF-Manager: Johannes Weber
Added to portfolio 23. Apr 2021