Patents by Inventor Willem Frederik Roos

Willem Frederik Roos has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10315925
    Abstract: The invention provides a method and a plant for producing urea ammonium nitrate (UAN). The method involves the use of a condensation section, optionally in combination with a medium pressure decomposition section, between the dissociation and neutralization sections. The invention further provides a method of modifying an existing UAN plant. The advantages of the process of the invention are that the emission of CO2 can be reduced, the plant capacity can be increased and the high capital expenditure needed for CO2 compression equipment is reduced.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: June 11, 2019
    Assignee: Stamicarbon B.V.
    Inventors: Johannes Henricus Mennen, Fredericus Henricus Maria Buitink, Willem Frederik Roos
  • Publication number: 20170260061
    Abstract: The invention provides a method and a plant for producing urea ammonium nitrate (UAN). The method involves the use of a condensation section, optionally in combination with a medium pressure decomposition section, between the dissociation and neutralization sections. The invention further provides a method of modifying an existing UAN plant. The advantages of the process of the invention are that the emission of CO2 can be reduced, the plant capacity can be increased and the high capital expenditure needed for CO2 compression equipment is reduced.
    Type: Application
    Filed: November 26, 2015
    Publication date: September 14, 2017
    Applicant: Stamicarbon B.V.
    Inventors: Johannes Henricus MENNEN, Fredericus Henricus Maria BUITINK, Willem Frederik ROOS
  • Patent number: 8835005
    Abstract: The present invention relates to a process for the preparation of granules comprising the steps of: providing a granulation zone comprising particles, the particles being kept in motion; providing a first feed stream comprising a liquid composition into the granulation zone, the liquid composition being applied onto or over the moving particles in the granulation zone; withdrawing a product stream comprising granules from the granulation zone, the granules being the result of layered growth of the moving particles in the granulation zone; wherein a second feed stream comprising granulation nuclei is fed into the granulation zone, wherein the granulation nuclei have a particle size distribution characterized by a standard deviation of the particle size that is less than 15% of the mean particle size, and wherein the second feed stream comprises between 0.05 wt % and 50 wt % of the product stream.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 16, 2014
    Assignee: Stamicarbon B.V.
    Inventors: Willem Frederik Roos, Fredericus Henricus Maria Buitink
  • Patent number: 8622325
    Abstract: The present invention relates to a process for the production of granules from a liquid composition with a decreased dust production, the process steps are as follows: applying the liquid composition onto solid particles that are kept in a continuous movement by a gas stream in a granulation zone of an oblong granulator, thereby depositing and solidifying liquid composition around the solid particles to increase the size of the particles and thereby form grown solid particles; discharging a stream of the grown solid particles from the granulation zone, dividing, in a size-sorting apparatus, the stream of grown solid particles into individual streams based on the size of the grown solid particles to thereby produce streams of undersized, oversized, and desired-sized grown solid particles; transferring the stream of oversized grown solid particles to a size-reducing apparatus; crushing the stream of oversized grown solid particles in the size-reducing apparatus, thereby reducing the particle size of the oversiz
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: January 7, 2014
    Assignee: Stamicarbon B.V.
    Inventors: Jozef Hubert Meessen, Willem Frederik Roos, Johannes Lambertus Kursten
  • Publication number: 20120231277
    Abstract: The present invention relates to a process for the preparation of granules comprising the steps of: providing a granulation zone comprising particles, the particles being kept in motion; providing a first feed stream comprising a liquid composition into the granulation zone, the liquid composition being applied onto or over the moving particles in the granulation zone; withdrawing a product stream comprising granules from the granulation zone, the granules being the result of layered growth of the moving particles in the granulation zone; wherein a second feed stream comprising granulation nuclei is fed into the granulation zone, wherein the granulation nuclei have a particle size distribution characterized by a standard deviation of the particle size that is less than 15% of the mean particle size, and wherein the second feed stream comprises between 0.05 wt % and 50 wt % of the product stream.
    Type: Application
    Filed: August 10, 2010
    Publication date: September 13, 2012
    Applicant: Stamicarbon B.V.
    Inventors: Willem Frederik Roos, Fredericus Henricus Maria Buitink
  • Publication number: 20120187223
    Abstract: The present invention relates to a process for the production of granules from a liquid composition with a decreased dust production, said process comprising the steps of: applying the liquid composition onto solid particles that are kept in a continuous movement by a gas stream in a granulation zone of an oblong granulator, thereby depositing and solidifying said liquid composition around said solid particles to increase the size of the particles and thereby form grown solid particles; discharging a stream of said grown solid particles from the granulation zone, dividing, in a size-sorting apparatus, said stream of said grown solid particles into individual streams based on the size of said grown solid particles to thereby produce streams of undersized, oversized, and desired-sized grown solid particles; transferring said stream of said oversized grown solid particles to a size-reducing apparatus; crushing said stream of said oversized grown solid particles in said size-reducing apparatus, thereby reducing t
    Type: Application
    Filed: May 11, 2010
    Publication date: July 26, 2012
    Applicant: STAMICARBON B.V.
    Inventors: Jozef Hubert Meessen, Willem Frederik Roos, Johannes Lambertus Kursten