Pneumatic conveyance method for methionine

{
  "publication_number": "US10981735B2",
  "country": "US",
  "kind": "B2",
  "title": "Pneumatic conveyance method for methionine",
  "abstract": "The present invention provides a method of airflow transportation of methionine that can minimize the crushing of methionine, which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas. In the method of airflow transportation of methionine of the present invention, if the D50 of methionine is in the range of 150 to 425 μm, the increase rate of the fine powder can be suppressed to 1.5% or less by maintaining the mixing ratio at 4 to 10 kg-methionine/kg-carrier gas, and can be suppressed to 1% or less by maintaining the mixing ratio at 5 to 10 kg-methionine/kg-carrier gas.",
  "claims": [
    "1. A method of airflow transportation of methionine which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas.",
    "2. The method of airflow transportation of methionine according to claim 1 which is characterized in that the mixing ratio is in the range of 5 to 10 kg-methionine/kg-carrier gas.",
    "3. The method of airflow transportation of methionine according to claim 1, which is characterized in that the D50 before the transportation of methionine is in the range of 150 to 425 μm.",
    "4. The method of airflow transportation of methionine according to claim 2, which is characterized in that the D50 before the transportation of methionine is in the range of 150 to 425 μm."
  ],
  "description_excerpt": "This application claims priority to and the benefit of Japanese Patent Application No. 2017-096909 filed May 16, 2017, the entire contents of which are incorporated herein by reference.\n\nThe present invention relates to a method for transporting airflow of methionine.\n\nMethionine produced through such methionine production process as shown in Patent Document 1 is a powder or a granule, which required transport from the end unit of the manufacturing process to a storage unit such as a tank and further to a filling unit in which methionine is weighed and filled in the container to accomplish its product package.\n\nAirflow transportation with a carrier gas in the pipe is preferable for transportation within the manufacturing apparatus because it is easy to avoid problems of scattering and contamination, but suitable conditions for airflow transportation have been unknown because there is no literature referring to airflow transportation of methionine.\n\nWhile the produced methionine is transported by airflow in the pipe, the methionine is crushed by collision with the lower part of the pipe or the bent pipe part, etc., thereby reduced handleability because of clogging of valves etc., provided in pipes caused by powdering, and product quality of methionine itself is lowered due to increase in fine powder. Therefore, the crushing during transportation must be avoided as much as possible in order to facilitate transportation and provide methionine of good quality as a product.",
  "cpc": [
    "B65G 53/04",
    "B65G 2812/165",
    "B65G 53/66",
    "C07C 319/26",
    "C07C 323/58"
  ],
  "ipc": [
    "B65G 53/04",
    "B65G 53/66"
  ],
  "assignees": [
    "Sumitomo Chemical Co Ltd"
  ],
  "inventors": [
    "Yoshiyuki Koizumi",
    "Naoya YAMASHIRO",
    "Rikuri UEJIMA"
  ],
  "filing_date": "2018-05-15",
  "publication_date": "2021-04-20",
  "grant_date": "2021-04-20",
  "priority_date": "2017-05-16",
  "application_number": "US-201816613481-A",
  "family_id": "64273844",
  "cited_by_count": 0,
  "citations": [
    "JPS60152451A",
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    "CN1291528A",
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    "JP2004043102A",
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    "JP2010111641A",
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    "WO2013005838A1",
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  ]
}