B01J2/30

Urea production method

The present invention is a urea production method, including: a first concentration step of concentrating an aqueous urea solution; a granulation step of producing solid urea from the concentrated urea solution generated in the first concentration step; a urea recovery step of treating exhaust gas from the granulation step and recovering urea dust in the exhaust gas to generate a recovered aqueous urea solution, the granulation step being configured so as to treat a concentrated urea solution containing an additive; and a second concentration step of concentrating the recovered aqueous urea solution as an additional concentration step, wherein the concentrated recovered urea solution generated in the second concentration step is joined to the concentrated urea solution in the downstream of the first concentration step, and an additive is added downstream of the first concentration step.

METHOD FOR REDUCING STICKING, CRUSTING AND CLUMPING OF SALT STORED IN SALT PILES
20240067853 · 2024-02-29 ·

A formulation for treating salt to reduce sticking, crusting and clumping of stored salt caused by absorption of water from the air includes desugared sugar beet molasses, admixtures of desugared sugar beet molasses exhibiting anti-sticking, anti-crusting and anti-clumping properties when applied to the salt, desugared sugar beet molasses processed to reduce pectin levels, admixtures of desugared sugar beet molasses processed to reduce pectin levels and also exhibiting anti-sticking, anti-crusting and anti-clumping properties when applied to the salt, sugar cane molasses, admixtures of sugar cane molasses exhibiting anti-sticking, anti-crusting and anti-clumping properties when applied to the salt, concentrated molasses solids (CMS), concentrated bypass syrup (CBS), concentrated syrup byproduct (CSB), raffinate, concentrated molasses solids (CMS) processed to remove chlorides, concentrated syrup byproduct (CSB) processed to remove chlorides, raffinate processed to remove chlorides, potassium acetate, glycerin and mixtures thereof.

Granular mixed oxide material and thermal insulating composition on its basis

Hydrophobized granular material comprising from 30 to 95% by weight of a pyrogenic mixed oxide based on silica and at least one oxide of metal M selected from of Al, Ti and Fe with the content of metal M oxide in the mixed oxide being from 01 to 10% by weight, and from 5 to 70% by weight of at least one IR-opacifier selected from the group consisting of silicon carbide, zirconium dioxide, ilmenites, iron titanates, zirconium silicates, manganese oxides, graphites, carbon blacks and mixtures thereof.

Granular mixed oxide material and thermal insulating composition on its basis

Hydrophobized granular material comprising from 30 to 95% by weight of a pyrogenic mixed oxide based on silica and at least one oxide of metal M selected from of Al, Ti and Fe with the content of metal M oxide in the mixed oxide being from 01 to 10% by weight, and from 5 to 70% by weight of at least one IR-opacifier selected from the group consisting of silicon carbide, zirconium dioxide, ilmenites, iron titanates, zirconium silicates, manganese oxides, graphites, carbon blacks and mixtures thereof.

Urea granules comprising lignosulfonate coating
11987535 · 2024-05-21 · ·

A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carcarboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.

Urea granules comprising lignosulfonate coating
11987535 · 2024-05-21 · ·

A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carcarboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.

PITCH GRANULES WHICH ARE SOLID AT ROOM TEMPERATURE
20190241813 · 2019-08-08 · ·

Pitch granules including a core made up of a first composition including at least one pitch, the composition having a penetrability at 25? C. of 0 to 45 1/10 mm, a ring-and-ball softening temperature (TBA) of 55? C. to 175? C., understanding the penetrability as measured according to standard EN 1426 and the TBA as measured according to standard EN 1427, and a layer encapsulating at least one portion of the surface of the core, the layer being made up of a coating composition including at least one anti-caking agent.

PITCH GRANULES WHICH ARE SOLID AT ROOM TEMPERATURE
20190241813 · 2019-08-08 · ·

Pitch granules including a core made up of a first composition including at least one pitch, the composition having a penetrability at 25? C. of 0 to 45 1/10 mm, a ring-and-ball softening temperature (TBA) of 55? C. to 175? C., understanding the penetrability as measured according to standard EN 1426 and the TBA as measured according to standard EN 1427, and a layer encapsulating at least one portion of the surface of the core, the layer being made up of a coating composition including at least one anti-caking agent.

COATED GRANULAR FERTILIZERS, METHODS OF MANUFACTURE THEREOF, AND USES

A coated fertilizer comprises a fertilizer granule; and a coating disposed on a surface of the fertilizer granule, wherein the coating comprises a poly(lactic acid); a second polymer comprising a poly(butylene succinate), a cellulose triacetate, or a combination comprising at least one of the foregoing; and a sealant. Methods of making the coated fertilizer are also disclosed.

COATED GRANULAR FERTILIZERS, METHODS OF MANUFACTURE THEREOF, AND USES

A coated fertilizer comprises a fertilizer granule; and a coating disposed on a surface of the fertilizer granule, wherein the coating comprises a poly(lactic acid); a second polymer comprising a poly(butylene succinate), a cellulose triacetate, or a combination comprising at least one of the foregoing; and a sealant. Methods of making the coated fertilizer are also disclosed.