Team

Prof. Panu Tikka

Dr. in pulping technology. Independent process technology developer, consultant and entrepreneur. Inventor of various pulping processess, such as SuperBatch, FreeFiber.

Eric Enqvist

Dr. in pulping technology. Specialized in non-wood raw-materials and unconventional pulping methods, co-inventor of FreeFiber process.

Ville Tarvo

Dr. in chemical engineering. Specialized in process modeling and industrial pulp bleaching.

Nina Filpus

MSc. in pulping technology. Specialized in laboratory techniques, manager of SPR laboratory since 2007

Heikki Hassi

Dr. in wood chemistry. Long international experience in pulp & paper, chemical and textile fibre industries.

Sakari Siren

MSc. in organic chemistry. Specialized in development of industrial viscose manufacture, laboratory management, and Q&E perspective.

Jarno Hartikainen

MSc. in applied chemistry. Specialized in pulp purification methods and chemical analytics for industrial use.

Roots

sci-puu

SciTech Biorefining + SciTech Laboratory + SciTech Cellulosics

SciTech-Service is a technology development company that offers consulting and laboratory services in biorefining and regenerated cellulosics

Competence areas

Services

SciTech-Service provides consulting and laboratory services in the following areas

 

hexas

SciTech-Service provides consulting and laboratory services in the following areas

viscose sidestream pulp paper,-board dissolving cellulosics biomass

Publications

sci-tech

Tekniikantie 12, Innopoli 02150 Espoo, Finland firstname.lastname@scitech.fi

SciTech Biorefining +358 40 593 5770 SciTech Cellulosics +358 50 321 8550 http://www.scitech.fi

SciTech Laboratory +358 40 549 7448 http://www.eksperimentti.fi/

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Scientific articles

Biorefinery & Pulping

TitleAuthor(s)PublisherYear
Modeling of alkaline extraction chemistry and kinetics of softwood kraft pulp.Kuitunen, Tarvo, Liitiä, Rovio, Vuorinen and AlopaeusHolzforschung.2014
Determination of the contribution of penetration, diffusion and alkali consumption in the impregnation of Eucalyptus grandis chips.Määttänen and TikkaAppita J2013
Determination of phenomena involved in impregnation of softwood chips. Part 2: alkali uptake, alkali consumption and impregnation yield.Määttänen and TikkaN.P.P.R.J.2012
Determination of phenomena involved in impregnation of softwood chips. Part 1. Method for calculating the true penetration degree.Määttänen and TikkaN.P.P.R.J.2012
Towards complete impregnation of wood chips with aqueous solutions. Part I. A retrospective and critical evaluation of the penetration process.Malkov, Tikka and GullichsenPap. Puu.2010
The Effect of Process Variables in Chlorine Dioxide Prebleaching of Birch Kraft Pulp. Part 1. Inorganic Chlorine Compounds, Kappa Number, Lignin, and Hexenuronic Acid Content.Lehtimaa, Tarvo, Kuitunen, Jääskelainen and VuorinenJ. Wood Chem. Technol.2010
Penetration of water into industrial softwood chips – influence of physical properties.Määttänen and TikkaPap. Puu.2009
Penetration of water and black liquor into overthick and treated wood chips.Määttänen and TikkaPap. Puu.2008
Towards complete impregnation of wood chips – new research enables effective processes.Malkov and TikkaTAPPI Fall Tech. Conf. Trade Fair2003
Towards complete impregnation of wood chips with aqueous solutions. Part 5: improving uniformity of kraft displacement batch pulping.Malkov, Tikka, Gustafson, Nuopponen and VuorinenPap. Puu.2003
Solving soap and turpentine related process problems in softwood draft millsTikka, Kovasin and LaxenPulp Pap. Canada2002
Towards complete impregnation of wood chips with aqueous solutions. Part 2. Studies on water penetration into softwood chips.Malkov, Tikka and GullichsenPap. Puu.2002
Efficiency of chip presteaming – result of heating and air escape processes.Malkov, Tikka, Kuzmin and BaltakhinovN.P.P.R.J.2002
Towards complete impregnation of wood chips with aqueous solutions. Part 4. Effects of front-end modifications in displacement batch kraft pulping.Malkov, Tikka and GullichsenPap. Puu.2002
The washing efficiency of digester displacement: new aspects based on laboratory studies and improved calculation procedures.Timonen, Kovasin and TikkaTAPPI Fall Tech. Conf. Trade Fair2002
Softwood fiber damage – a newly discovered enigma in modern kraft fiber lines.Tikka and SundquistPulping Conf.2001
Towards complete impregnation of wood chips with aqueous solutions. Part 3. Black liquor penetration into pine chips.Malkov, Tikka and GullichsenPap. Puu.2001
Behavior of pine wood material during displacement kraft batch cooking.Siistonen, Svedman, Alen and TikkaPap. Puu.1999
Pulping and paper technical characteristics of the Sumatra tropical hardwoods.Lammi, Tikka and SvedmanGen. Conf. Proc.1998
Effects of softwood morphology and chip thickness on pulping with a displacement kraft batch process.Svedman, Tikka and LuhtanenTappi J.1998
Relations between cooking conditions, pulp quality and bleachability as studied using a new superbatch experimental cooking system.Svedman, Tikka and KovasinSection Title: Cellulose, Lignin, Paper, and Other Wood Products1995
Chip thickness vs. kraft pulping performance: experiments by multiple hanging baskets in batch digesters.Tikka, Tähkänen and KovasinTappi J.1993
Present prospects of the neutral sulfite-anthraquinone methodTikka, Virkola and WongPapier (Darmstadt)1989
Substituent effects on carbon-13 chemical shifts of aromatic carbons in β-O-4 and β-5 type lignin model compounds.Hassi, Aoyama, Tai, Chen and GratzlJ. Wood Chem. Technol.1987
Separation of sulfite spent liquor components by ion exclusion chromatographyHassi, Tikka and SjöstromSection Title: Cellulose, Lignin, Paper, and Other Wood Products1981

Bleaching

TitleAuthor(s)PublisherYear
Lignin oxidation mechanisms under oxygen delignification conditions. Part 3. Reaction pathways and modelingKuitunen, Kalliola, Tarvo, Tamminen, Rovio, Liitiä, Ohra-aho, Lehtimaa, Vuorinen and AlopaeusHolzforschung.2011
A Model for Chlorine Dioxide Delignification of Chemical Pulp.Tarvo, Lehtimaa, Kuitunen, Alopaeus, Vuorinen and AittamaaJ. Wood Chem. Technol.2010
Specific Permeability of Wood to Water. Part 1: Longitudinal Specific Permeability of Steamed, Impregnated, and Kraft-Cooked Wood.Pokki, Laakso, Tikka and AittamaaInd. Eng. Chem. Res.2010
Kinetics of Aldehyde Oxidation by Chlorous Acid.Lehtimaa, Kuitunen, Tarvo and VuorinenInd. Eng. Chem. Res.2010
Reactions of aldehydes with chlorous acid and chlorite in chlorine dioxide bleaching.Lehtimaa, Kuitunen, Tarvo and VuorinenHolzforschung.2010
Specific Permeability of Wood to Water. Part 2: Perpendicular Specific Permeability of Steamed, Impregnated, and Kraft-Cooked Wood.Pokki, Laakso, Tikka and AittamaaInd. Eng. Chem. Res.2010
The Kinetics and Stoichiometry of the Reaction between Hypochlorous Acid and Chlorous Acid in Mildly Acidic Solutions.Tarvo, Lehtimaa, Kuitunen, Alopaeus, Vuorinen and AittamaaInd. Eng. Chem. Res.2009
Chlorate formation in chlorine dioxide delignification-an analysis via elementary kinetic modelingTarvo, Lehtimaa, Kuitunen, Alopaeus and VuorinenJ. Wood Chem. Technol.2009
Modelling of chemical pulp bleaching.Tarvo, Kuitunen, Lehtimaa, Tervola, Räsänen, Tamminen, Aittamaa, Vuorinen and HenricsonNord. Pulp Pap. Res. J.2008
Reactions and Kinetics of Cl(III) Decomposition.Lehtimaa, Tarvo, Mortha, Kuitunen and VuorinenInd. Eng. Chem. Res.2008
[AlMnII(H2O)W11O39]7- anion oxidation kinetics and simulative overall studies of catalytic oxygen bleaching.Ruuttunen, Tarvo, Aittamaa and VuorinenNord. Pulp Pap. Res. J.2006

Other scientific articles

TitleAuthor(s)PublisherYear
Automating the NMR analysis of base oils: Finding naphthene signals.Mäkela, Karhunen, Siren, Heikkinen and KilpeläinenFuel.2013
A new concept for web offset printing papers.Teräsvuori, Hassi and PattTappi J1986

Presentations

TitleAuthor(s)PublisherYear
Capturing the Man Made Cellulosic Fibre`s great opportunityHeikki Hassi5th Avancell conference presentation2015
Opportunities in alternative pulp grades for viscose manufactureHeikki Hassi9th Viscose Industry Forum Conference Presentation2015
Future Outlook of Man Made Cellulosic FibresHeikki HassiFinnish Wood- and Polymer Chemistry Association2015
Prospecties of Global Forest IndustriesHeikki HassiIndian Forest Officers Mid Career Training Presentation2010

Patents

Biorefinery & Pulping

TitleInventor(s)Priority number(s)
A builder for an alkaline detergentDamen, Hassi, KettunenFI19880000246
Batch process for preparing pulpMartikainen, Tikka, Timonen, SvedmanFI20030001929
Method for the production of precleaned pulpTikka, Svedman, FantUS20000589706, US19980167423, FI19970004455
Composition for increasing the mass absorption of polar systems in hydrofobic-hydrophilic hybrid materialsBaumann, Burger, Deubzer, TikkaDE1999139866
Batch process for preparing improved kraft pulp.Tikka, SvedmanFI19960002260
Production of prehydrolyzed pulpTikka, KovatsinFI19940000332
Batch process for preparing kraft pulpHijanen, TikkaFI19910003160
Method of wood raw material processingTikka, VirkolaFI19870001730
Method for treating cellulose and alkali solutions obtained from the treatment of celluloseHassi, TikkaFI20145722
Process for preparing kraft pulp using black liquor pretreatment reactionTikkaUS19910794795, FI19900000663, US19900563438
Method for producing high purity ligninTikkaWO2013SE50051
Process for the production of a hemicellulose hydrolysate and special high alpha cellulose pulpTikka, VirkolaFI19870001730, US19880180210, US19890420647, US19900535287
Production of pulp using a gaseous organic agent as heating and reaction-accelerating mediaEnqvist, Tikka, Leopold, LuhtanenFI20030001929
Process for preparing kraft pulpTikkaFI19900000663
Method for recovering hydrolysis productsUusitalo, TikkaFI20060005105

Bleaching

TitleInventor(s)Priority number(s)
Method for bleaching fiber materialSirenFI20110005668
Method for bleaching fibrous material made from atypical raw materialHassi, Siren, Partanen, IsoherranenFI20110005335
Bleaching process of chemical pulpVilponen, TikkaFI20060000314 WO2007FI50168
Bleaching process of chemical pulpVilponen, TikkaWO2007FI50167, FI20060000313
Bleaching of medium consistency pulp with ozone without high shear mixingDe Vos, TikkaUS20010763221, FI19980001808, US20050029732
Bleaching of medium consistency pulp with ozone without high shear mixingDe Vos, TikkaFI19980001808
Bleaching and coating a paper web with peroxide and starchHassi, Johansson, TeittinenUS5637193

Process Control and Measurements

TitleInventor(s)Priority number(s)
Method of controlling alkaline pulping processTikka, VirkolaUS19890330954, US19870136507
Method of determining rapidly the concentration of the total sulphur dioxide and the lignosulphonate present in sulphite pulping process liquorsTikka, VirkolaFI19830004870
Apparatus for continually sampling liquor from a pulp digester.TikkaUS19880176977
Method for rapid determination of the contents of lignin, monosaccharides and organic acids in the process solutions of sulfite pulpingTikka, VirkolaUS19860819136, US19830543120
Method for controlling sulphite pulping and hydrolytic processes by means of rapid furfural analyzerTikka, VirkolaFI19840002488
Method for the rapid determination of the concentrations of lignin, monosaccharides and organic acids in process solutions from sulphite digestionTikka, VirkolaFI19820003574

Others

TitleInventor(s)Priority number(s)
Antimicrobial polymer material and its useLaxen, HassiFI20060005350
Hylsa foer pappersrulle sampt foerfarande foer dess framstaellningHassi, Puotinen, MansikkamäkiFI19880004130
Hylsa foer pappersrulle sampt foerfarande foer dess framstaellningHassi, Puotinen, MansikkamäkiFI19880004129